diff --git a/.github/dependabot.yaml b/.github/dependabot.yaml
index ed8d5c8a..d3abac03 100644
--- a/.github/dependabot.yaml
+++ b/.github/dependabot.yaml
@@ -61,6 +61,7 @@ updates:
       - "infrastructure/modules/rds-gateway-ecs-task"
       - "infrastructure/modules/rds-instance"
       - "infrastructure/modules/rds-users"
+      - "infrastructure/modules/rds"
       - "infrastructure/modules/s3-bucket"
       - "infrastructure/modules/s3"
       - "infrastructure/modules/secrets-manager"
diff --git a/README.md b/README.md
index bc97b9f3..2fa4fc96 100644
--- a/README.md
+++ b/README.md
@@ -323,6 +323,7 @@ Rules:
 | `parameter_store` | — | SSM Parameter Store configuration |
 | `r53` | terraform-aws-modules/route53/aws | Route 53 DNS Zones, Records, Resolver and Resolver Firewall |
 | `r53-healthcheck` | — | Route 53 health checks |
+| `rds` | terraform-aws-modules/rds/aws | RDS database instance |
 | `rds-database` | — | RDS database (logical) |
 | `rds-gateway-ecs-task` | — | RDS gateway ECS task definition |
 | `rds-instance` | — | RDS instance |
diff --git a/infrastructure/modules/rds/.terraform.lock.hcl b/infrastructure/modules/rds/.terraform.lock.hcl
new file mode 100644
index 00000000..61bf386e
--- /dev/null
+++ b/infrastructure/modules/rds/.terraform.lock.hcl
@@ -0,0 +1,55 @@
+# This file is maintained automatically by "terraform init".
+# Manual edits may be lost in future updates.
+
+provider "registry.terraform.io/hashicorp/aws" {
+  version     = "6.51.0"
+  constraints = ">= 6.14.0, >= 6.28.0, >= 6.42.0"
+  hashes = [
+    "h1:017ISHZZBI+yeqA4AAtgLQJC7Lhd4wYM7tEKYmlk/7Y=",
+    "h1:4c8zjgtGH0QgP+p/cF1UqdqkvD7V5i0ZxqslieZLTbc=",
+    "h1:QWxF+1ePJ4qFCHEc6PyHNeXc865wLvrWVl71d/nABa8=",
+    "h1:aPBmqoiYqfrIgCGwzuemljkOXuGCYQRTXo91nQxrE+s=",
+    "h1:bclp+xS1fYeOCil0XZO6mKvEeHFESt5K/XotVSZND54=",
+    "zh:03fcea0a1ea2ca81d62d4d2e2961181bef9068b1c701f2cddc4aa5fac105818a",
+    "zh:1213944cd623143974ea5c9b70b22ae1ccca33d743924c149ed089d34b8e08b4",
+    "zh:190a46da0c69082b74da48238ce134d2fc9893e09122ac249c5689f88eab7e13",
+    "zh:1b312a4b53fa3cf731f95e674c033865feea5455f163b86136f2614424637293",
+    "zh:2b319814806222c5aba196b1a78756a6b36dc5c91f85edda349234d8a2f20a6a",
+    "zh:2bddf92c8efc6ad445a2eb8a0e5f88742a0596392c3a4ebc350ebb4105a4a96d",
+    "zh:3bef0c4f675c09034ff017cf899977b1765b2c0b3d1e489bcb06a5fcac316e2d",
+    "zh:47c46b5aa22199638fed5c93b195bbfd1182a1408edad4e5c39d4a73a04493f6",
+    "zh:5f808699650f6db961964466c77f5a581eab142a91c2e54810bb09b6f2fcd3f2",
+    "zh:9b12af85486a96aedd8d7984b0ff811a4b42e3d88dad1a3fb4c0b580d04fa425",
+    "zh:ada97e6be10164f452e278c23412b8597698a9c95ffb68fe83629d63d85906f3",
+    "zh:c4d73a91810d8dbcf9abbd431d41fcceebb48f8b6fd3c28a84bb3c6ed08be2e9",
+    "zh:c63ec875d38fc557b16b0b2b0ab1c7635852799453113240e21a52409de94a71",
+    "zh:cdd0209a755fc3aa14855aa013dae4b166a2fc7f6d3cbb673f7ff2142f5b63a2",
+    "zh:e5e665a27290391fd1bffc093ab68b596f6c507785be2e3f0949fab4fd6aec1b",
+    "zh:f6c42046a31d65eff2793737656b38931f90318b53661046bb84326cd4cb558f",
+  ]
+}
+
+provider "registry.terraform.io/hashicorp/random" {
+  version     = "3.9.0"
+  constraints = ">= 3.1.0"
+  hashes = [
+    "h1:OO+IuvQJSPmWdN8AyyIEvPJbLvDQpgX/zbktoa9KsJE=",
+    "h1:UlBuNVuCGJ39tTv2c5gz2NRZnQbXfbIWbTzWcth5o74=",
+    "h1:lVDv+0AjDjrLfpmaJbWqUmIw/k3/AHXLc3N4m55SNdo=",
+    "h1:o0s5Mk9NXMP60nlheO1r0LsDGGratFb3oL0t7bD2QnM=",
+    "h1:q/uaUTBdKgAmZESrwsoeDQff9uUA/cI/N5ZKNgVwa9c=",
+    "zh:161ad0bd9a75768c82f53fb6e7172a9d8be2d4889b012645a34795031aaf1bf1",
+    "zh:19dc9a5b17729725ccfc4f45b0500af0ee5bc6b6b160c7adb8f2bf617d2c80ea",
+    "zh:269eda8fe42daa7974d5a34d166c3ba9defe80cde86c01e4dadcfdf2e1f05e5f",
+    "zh:373f7c65566f8f2cc7f45d698654feb9d988996957e1266a69ca00c52d6d16d0",
+    "zh:5599d16804c41c83009ec621b6d6b6f74e102f5827678a4750f8809055546b61",
+    "zh:583be0440469a22bff70dcfa56593b01566860b29607437264adb51060cf46fc",
+    "zh:5f211d8ec3f2e1f414870d9584bfe26e6995560ef81c748f8447a48164767398",
+    "zh:78d5eefdd9e494defcb3c68d282b8f96630502cac21d1ea161f53cfe9bb483b3",
+    "zh:7b547fd16216761ef86efc3ed516ac5ac0c5c42b7c7eb24a08cef2d93f69ed5e",
+    "zh:7e7c0679daf2a382151d05068c8c3f0dae6b7b7dccf818827b73dd08638df2ef",
+    "zh:8089dec888a8038b9b4fb23b3df7e1057293dbc5b60b42cc47ff690d69d4b61b",
+    "zh:c51f15a031edfd6f23ce8ced3446ca7f8d8d647e2499890d7d5d10d5016d7257",
+    "zh:c94784f005708890dc6895afd53636ec00ec1e430b15d41e5aebfb1d4b39bd04",
+  ]
+}
diff --git a/infrastructure/modules/rds/README.md b/infrastructure/modules/rds/README.md
new file mode 100644
index 00000000..0c3aed31
--- /dev/null
+++ b/infrastructure/modules/rds/README.md
@@ -0,0 +1,394 @@
+# RDS Module
+
+Thin NHS wrapper around [`terraform-aws-modules/rds/aws`](https://registry.terraform.io/modules/terraform-aws-modules/rds/aws/latest) (v7.2.0).
+
+The module provisions an RDS DB instance together with its subnet group, parameter group, option group, and (optionally) an Enhanced Monitoring IAM role. The caller is responsible for creating a security group (use the dedicated security group module) and passing its ID via `vpc_security_group_ids`.
+
+## What this module enforces
+
+|Control|Value|Reason|
+|---|---|---|
+|`publicly_accessible`|`false`|Databases must never be internet-facing|
+|`storage_encrypted`|`true`|Encryption at rest is mandatory|
+|`copy_tags_to_snapshot`|`true`|Snapshots must carry the same tags as the instance|
+|`auto_minor_version_upgrade`|`false`|Teams keep instances in sync with the production engine version|
+|`create_db_subnet_group`|`true`|subnet group is always managed by this module|
+|Creation gate|`module.this.enabled`|Prevents all managed RDS resources when disabled|
+
+## Usage
+
+### Minimal PostgreSQL instance
+
+```hcl
+module "postgres_rds" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/rds?ref=vX.Y.Z"
+
+  service     = "bcss"
+  project     = "screening"
+  environment = "dev"
+  stack       = "database"
+  workspace   = terraform.workspace
+
+  engine               = "postgres"
+  engine_version       = "16"
+  major_engine_version = "16"
+  family               = "postgres16"
+
+  instance_class    = "db.t4g.medium"
+  allocated_storage = 100
+
+  db_name  = "screening"
+  username = var.rds_master_username
+  port     = 5432
+
+  password_wo         = var.rds_master_password
+  password_wo_version = 1
+
+  subnet_ids             = data.aws_subnets.private.ids
+  vpc_security_group_ids = [module.rds_security_group.security_group_id]
+}
+```
+
+### Oracle with a fresh database
+
+```hcl
+module "oracle_rds" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/rds?ref=vX.Y.Z"
+
+  # context
+  service     = var.service
+  environment = var.environment
+  workspace   = terraform.workspace
+
+  # identity (optional)
+  # If omitted, the module derives a name from context labels.
+  custom_name = "${var.name_prefix}-oracle-${var.environment}-${terraform.workspace}"
+
+  # engine
+  engine               = "oracle-ee"
+  engine_version       = "19"
+  license_model        = "license-included"
+  major_engine_version = "19"
+  family               = "oracle-ee-19"
+  character_set_name   = "AL32UTF8"
+
+  # sizing
+  instance_class    = "db.m5.large"
+  allocated_storage = 100
+  storage_type      = "gp3"
+
+  # database
+  db_name  = "MYDB"
+  username = var.rds_master_username
+  port     = 1521
+
+  # credentials (write-only — not stored in state)
+  password_wo         = var.rds_master_password
+  password_wo_version = 1
+
+  # networking
+  subnet_ids             = data.aws_subnets.private.ids
+  vpc_security_group_ids = [module.rds_security_group.security_group_id]
+
+  # options (Oracle S3 integration and timezone)
+  options = [
+    {
+      option_name                    = "S3_INTEGRATION"
+      version                        = "1.0"
+      port                           = 0
+      vpc_security_group_memberships = []
+      option_settings                = []
+    },
+    {
+      option_name                    = "Timezone"
+      port                           = 0
+      vpc_security_group_memberships = []
+      option_settings = [
+        { name = "TIME_ZONE", value = "Europe/London" }
+      ]
+    }
+  ]
+
+  # parameters
+  parameters = [
+    { name = "_add_col_optim_enabled", value = "TRUE", apply_method = "immediate" }
+  ]
+
+  # availability and backup
+  multi_az                = var.environment == "prod" ? true : false
+  backup_retention_period = 7
+  skip_final_snapshot     = false
+  deletion_protection     = var.environment == "prod" ? true : false
+}
+```
+
+### Restore from snapshot
+
+```hcl
+module "oracle_rds" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/rds?ref=vX.Y.Z"
+
+  # ... (same as above)
+
+  # When restoring from a snapshot, character_set_name must be null
+  character_set_name  = null
+  snapshot_identifier = "rds:my-db-2024-01-01-06-00"
+}
+```
+
+### RDS-managed password (no password in Terraform state)
+
+```hcl
+module "oracle_rds" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/rds?ref=vX.Y.Z"
+
+  # ...
+
+  manage_master_user_password = true
+  # password_wo is not required when manage_master_user_password = true
+}
+```
+
+### With security-group and secrets-manager modules
+
+This example shows the recommended pattern for production use: integrating with the dedicated security-group and secrets-manager modules.
+
+```hcl
+# Create a security group using the NHS security-group wrapper module
+module "rds_security_group" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/security-group?ref=vX.Y.Z""
+
+  service     = "bcss"
+  project     = "screening"
+  environment = var.environment
+  workspace   = terraform.workspace
+
+  vpc_id      = data.aws_vpc.private.id
+  description = "Security group for RDS database"
+
+  # Allow inbound on Oracle port from application security group
+  ingress_rules = [
+    {
+      from_port       = 1521
+      to_port         = 1521
+      protocol        = "tcp"
+      security_groups = [module.app_security_group.security_group_id]
+      description     = "Oracle from application"
+    }
+  ]
+}
+
+# Store the master password in Secrets Manager
+module "rds_secret" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/secrets-manager?ref=vX.Y.Z"
+
+  service     = "bcss"
+  project     = "screening"
+  environment = var.environment
+  workspace   = terraform.workspace
+  name        = "rds-master-password"
+
+  secret_string = var.rds_master_password
+  # Optionally: managed rotation, encryption key, tags, etc.
+}
+
+# Create the RDS instance with the security group and managed password
+module "oracle_rds" {
+  source = "git::https://github.com/NHSDigital/screening-terraform-modules-aws//infrastructure/modules/rds?ref=vX.Y.Z"
+
+  service     = "bcss"
+  project     = "screening"
+  environment = var.environment
+  workspace   = terraform.workspace
+  stack       = "database"
+
+  engine               = "oracle-ee"
+  engine_version       = "19"
+  license_model        = "license-included"
+  major_engine_version = "19"
+  family               = "oracle-ee-19"
+  character_set_name   = "AL32UTF8"
+
+  instance_class    = "db.m5.large"
+  allocated_storage = 500
+  storage_type      = "gp3"
+
+  db_name  = "MYDB"
+  username = var.rds_master_username
+  port     = 1521
+
+  # Use RDS Secrets Manager integration for password management
+  manage_master_user_password = true
+  # The password is automatically stored in Secrets Manager by RDS
+  # Retrieve it via module output: module.oracle_rds.master_user_secret_arn
+
+  subnet_ids             = data.aws_subnets.private.ids
+  # Pass the security group created above
+  vpc_security_group_ids = [module.rds_security_group.security_group_id]
+
+  multi_az                = var.environment == "prod"
+  backup_retention_period = 7
+  skip_final_snapshot     = false
+  deletion_protection     = var.environment == "prod"
+
+  depends_on = [module.rds_security_group]
+}
+
+# Output the secret arn for application connection strings
+output "rds_secret_arn" {
+  value       = module.rds_secret.secret_arn
+  description = "arn of the RDS master password secret"
+}
+
+output "rds_endpoint" {
+  value       = module.oracle_rds.instance_endpoint
+  description = "RDS instance endpoint (host:port)"
+}
+```
+
+The master password arn is exposed via the `master_user_secret_arn` output.
+
+## Conventions
+
+- Naming and tagging come from shared `context.tf` via `module.this`.
+- Identifier resolution order is `custom_name`, then `identifier`, then `module.this.id`.
+- Security groups are intentionally caller-managed. This module associates IDs passed via `vpc_security_group_ids`.
+- Resource creation is gated by `module.this.enabled`.
+- Snapshot tagging is always enabled via `copy_tags_to_snapshot = true`.
+- Resource arn values (e.g., `instance_arn`) are exposed as output attributes.
+- IAM authentication and resource tagging require the instance resource ID.
+
+## What this module does NOT do
+
+- Create or manage security groups.
+- Allow public internet access to the database instance.
+- Disable encryption at rest.
+- Enable automatic minor engine upgrades.
+
+## Migration from the local bcss `rds` module
+
+When migrating from `../../modules/rds` in the bcss repo to this shared module, note:
+
+1. **Output names** — `instance_endpoint`, `instance_address`, `instance_port`, and `rds_subnet_group` are compatible with the local module. `rds_security_group` is no longer an output — the caller now owns the security group resource.
+2. **`snapshot_identifier`** — The local module used `""` as "no snapshot". This module uses `null`. Update the calling stack.
+3. **`password_wo`** — The local module accepted `master_password` as a plain variable (stored in state). This module uses `password_wo` (write-only, not persisted in state).
+4. **`deletion_protection`** — Defaults to `true` here (defaults to whatever `var.deletion_protection` was in the local module). Add `#checkov:skip=CKV_AWS_293` to the module call in non-production stacks.
+5. **`ignore_changes` lifecycle** — The local module ignored `engine`, `engine_version`, `availability_zone`, `db_subnet_group_name`, and `storage_encrypted` on the `aws_db_instance`. These lifecycle rules are inside the community module and cannot be overridden from a wrapper. Raise this as a known limitation in the migration PR.
+
+<!-- vale off -->
+<!-- markdownlint-disable -->
+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+| Name | Version |
+| ---- | ------- |
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.13 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 6.42 |
+
+## Providers
+
+No providers.
+
+## Modules
+
+| Name | Source | Version |
+| ---- | ------ | ------- |
+| <a name="module_rds"></a> [rds](#module\_rds) | terraform-aws-modules/rds/aws | 7.2.0 |
+| <a name="module_this"></a> [this](#module\_this) | ../tags | n/a |
+
+## Resources
+
+No resources.
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+| ---- | ----------- | ---- | ------- | :------: |
+| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br/>This is for some rare cases where resources want additional configuration of tags<br/>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
+| <a name="input_allocated_storage"></a> [allocated\_storage](#input\_allocated\_storage) | The allocated storage in gibibytes | `number` | n/a | yes |
+| <a name="input_application_role"></a> [application\_role](#input\_application\_role) | The role the application is performing | `string` | `"General"` | no |
+| <a name="input_apply_immediately"></a> [apply\_immediately](#input\_apply\_immediately) | Apply modifications immediately rather than deferring to the next maintenance window | `bool` | `false` | no |
+| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br/>in the order they appear in the list. New attributes are appended to the<br/>end of the list. The elements of the list are joined by the `delimiter`<br/>and treated as a single ID element. | `list(string)` | `[]` | no |
+| <a name="input_aws_region"></a> [aws\_region](#input\_aws\_region) | The AWS region | `string` | `"eu-west-2"` | no |
+| <a name="input_backup_retention_period"></a> [backup\_retention\_period](#input\_backup\_retention\_period) | Number of days to retain automated backups. Must be between 0 and 35 | `number` | `7` | no |
+| <a name="input_backup_window"></a> [backup\_window](#input\_backup\_window) | Daily UTC time range for automated backups (e.g. '23:00-23:30'). Must not overlap with maintenance\_window | `string` | `"23:00-23:30"` | no |
+| <a name="input_character_set_name"></a> [character\_set\_name](#input\_character\_set\_name) | Oracle character set name. Cannot be changed after creation. Must be null when restoring from a snapshot | `string` | `null` | no |
+| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br/>See description of individual variables for details.<br/>Leave string and numeric variables as `null` to use default value.<br/>Individual variable settings (non-null) override settings in context object,<br/>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br/>  "additional_tag_map": {},<br/>  "attributes": [],<br/>  "delimiter": null,<br/>  "descriptor_formats": {},<br/>  "enabled": true,<br/>  "environment": null,<br/>  "id_length_limit": null,<br/>  "label_key_case": null,<br/>  "label_order": [],<br/>  "label_value_case": null,<br/>  "labels_as_tags": [<br/>    "unset"<br/>  ],<br/>  "name": null,<br/>  "project": null,<br/>  "regex_replace_chars": null,<br/>  "region": null,<br/>  "service": null,<br/>  "stack": null,<br/>  "tags": {},<br/>  "terraform_source": null,<br/>  "workspace": null<br/>}</pre> | no |
+| <a name="input_custom_name"></a> [custom\_name](#input\_custom\_name) | Optional override name for the RDS instance. Takes precedence over identifier when set. | `string` | `null` | no |
+| <a name="input_data_classification"></a> [data\_classification](#input\_data\_classification) | Used to identify the data classification of the resource, e.g 1-5 | `string` | `"n/a"` | no |
+| <a name="input_data_type"></a> [data\_type](#input\_data\_type) | The tag data\_type | `string` | `"None"` | no |
+| <a name="input_db_name"></a> [db\_name](#input\_db\_name) | The name of the database to create. Omit to skip initial database creation | `string` | `null` | no |
+| <a name="input_deletion_protection"></a> [deletion\_protection](#input\_deletion\_protection) | Prevents the DB instance from being deleted when true. Should be true in production | `bool` | `true` | no |
+| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br/>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
+| <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br/>Map of maps. Keys are names of descriptors. Values are maps of the form<br/>`{<br/>    format = string<br/>    labels = list(string)<br/>}`<br/>(Type is `any` so the map values can later be enhanced to provide additional options.)<br/>`format` is a Terraform format string to be passed to the `format()` function.<br/>`labels` is a list of labels, in order, to pass to `format()` function.<br/>Label values will be normalized before being passed to `format()` so they will be<br/>identical to how they appear in `id`.<br/>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
+| <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
+| <a name="input_engine"></a> [engine](#input\_engine) | The database engine to use (e.g. 'oracle-ee', 'postgres', 'mysql') | `string` | n/a | yes |
+| <a name="input_engine_version"></a> [engine\_version](#input\_engine\_version) | The engine version to use | `string` | n/a | yes |
+| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used to indicate role, e.g. 'prd', 'dev', 'test', 'preprod', 'prod', 'uat' | `string` | `null` | no |
+| <a name="input_family"></a> [family](#input\_family) | DB parameter group family (e.g. 'oracle-ee-19', 'postgres16', 'mysql8.0') | `string` | n/a | yes |
+| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br/>Set to `0` for unlimited length.<br/>Set to `null` for keep the existing setting, which defaults to `0`.<br/>Does not affect `id_full`. | `number` | `null` | no |
+| <a name="input_identifier"></a> [identifier](#input\_identifier) | Explicit name for the RDS instance. If null, this module derives the name from context labels. | `string` | `null` | no |
+| <a name="input_instance_class"></a> [instance\_class](#input\_instance\_class) | The instance type of the RDS instance (e.g. 'db.m5.large') | `string` | n/a | yes |
+| <a name="input_iops"></a> [iops](#input\_iops) | Provisioned IOPS. Required when storage\_type is 'io1' or 'io2' | `number` | `null` | no |
+| <a name="input_kms_key_id"></a> [kms\_key\_id](#input\_kms\_key\_id) | ARN of the KMS key for storage encryption. If omitted, the default account KMS key is used | `string` | `null` | no |
+| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br/>Does not affect keys of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper`.<br/>Default value: `title`. | `string` | `null` | no |
+| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.<br/>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br/>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
+| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br/>set as tag values, and output by this module individually.<br/>Does not affect values of tags passed in via the `tags` input.<br/>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br/>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br/>Default value: `lower`. | `string` | `null` | no |
+| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br/>Default is to include all labels.<br/>Tags with empty values will not be included in the `tags` output.<br/>Set to `[]` to suppress all generated tags.<br/>**Notes:**<br/>  The value of the `name` tag, if included, will be the `id`, not the `name`.<br/>  Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br/>  changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br/>  "default"<br/>]</pre> | no |
+| <a name="input_license_model"></a> [license\_model](#input\_license\_model) | License model for the DB instance. Required for some engines (e.g. Oracle SE1 requires 'license-included') | `string` | `null` | no |
+| <a name="input_maintenance_window"></a> [maintenance\_window](#input\_maintenance\_window) | Weekly maintenance window (e.g. 'Sun:00:00-Sun:03:00') | `string` | `"Sun:00:00-Sun:03:00"` | no |
+| <a name="input_major_engine_version"></a> [major\_engine\_version](#input\_major\_engine\_version) | Major engine version for the option group (e.g. '19' for Oracle 19c) | `string` | n/a | yes |
+| <a name="input_manage_master_user_password"></a> [manage\_master\_user\_password](#input\_manage\_master\_user\_password) | When true, RDS manages the master password in Secrets Manager. When false, password\_wo must be provided | `bool` | `false` | no |
+| <a name="input_max_allocated_storage"></a> [max\_allocated\_storage](#input\_max\_allocated\_storage) | Upper limit for storage autoscaling in gibibytes. Set to 0 to disable autoscaling | `number` | `0` | no |
+| <a name="input_monitoring_interval"></a> [monitoring\_interval](#input\_monitoring\_interval) | Interval in seconds between Enhanced Monitoring data points. Valid values: 0, 1, 5, 10, 15, 30, 60. Set to 0 to disable | `number` | `5` | no |
+| <a name="input_multi_az"></a> [multi\_az](#input\_multi\_az) | Specifies if the RDS instance is Multi-AZ | `bool` | `false` | no |
+| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br/>This is the only ID element not also included as a `tag`.<br/>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
+| <a name="input_on_off_pattern"></a> [on\_off\_pattern](#input\_on\_off\_pattern) | Used to turn resources on and off based on a time pattern | `string` | `"n/a"` | no |
+| <a name="input_options"></a> [options](#input\_options) | List of option group options to apply. See the community module documentation for the full object shape | `any` | `[]` | no |
+| <a name="input_owner"></a> [owner](#input\_owner) | The name and or NHS.net email address of the service owner | `string` | `"None"` | no |
+| <a name="input_parameters"></a> [parameters](#input\_parameters) | List of DB parameters to apply to the parameter group | <pre>list(object({<br/>    name         = string<br/>    value        = string<br/>    apply_method = optional(string)<br/>  }))</pre> | `[]` | no |
+| <a name="input_password_wo"></a> [password\_wo](#input\_password\_wo) | Write-only password for the master DB user. Required when manage\_master\_user\_password is false and snapshot\_identifier is not set | `string` | `null` | no |
+| <a name="input_password_wo_version"></a> [password\_wo\_version](#input\_password\_wo\_version) | Increment this value to trigger a password rotation when password\_wo changes | `number` | `1` | no |
+| <a name="input_performance_insights_enabled"></a> [performance\_insights\_enabled](#input\_performance\_insights\_enabled) | Enable Performance Insights | `bool` | `true` | no |
+| <a name="input_performance_insights_kms_key_id"></a> [performance\_insights\_kms\_key\_id](#input\_performance\_insights\_kms\_key\_id) | ARN of the KMS key used to encrypt Performance Insights data. If omitted, the default KMS key is used | `string` | `null` | no |
+| <a name="input_performance_insights_retention_period"></a> [performance\_insights\_retention\_period](#input\_performance\_insights\_retention\_period) | Retention period for Performance Insights data in days. Valid values: 7, 731, or a multiple of 31 | `number` | `7` | no |
+| <a name="input_port"></a> [port](#input\_port) | The port on which the DB accepts connections | `number` | n/a | yes |
+| <a name="input_project"></a> [project](#input\_project) | ID element. A project identifier, indicating the name or role of the project the resource is for, such as `website` or `api` | `string` | `null` | no |
+| <a name="input_public_facing"></a> [public\_facing](#input\_public\_facing) | Whether this resource is public facing | `bool` | `false` | no |
+| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br/>Characters matching the regex will be removed from the ID elements.<br/>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
+| <a name="input_region"></a> [region](#input\_region) | ID element \_(Rarely used, not included by default)\_.  Usually an abbreviation of the selected AWS region e.g. 'uw2', 'ew2' or 'gbl' for resources like IAM roles that have no region | `string` | `null` | no |
+| <a name="input_service"></a> [service](#input\_service) | ID element. Usually an abbreviation of your service directorate name, e.g. 'bcss' or 'csms', to help ensure generated IDs are globally unique | `string` | `null` | no |
+| <a name="input_service_category"></a> [service\_category](#input\_service\_category) | The tag service\_category | `string` | `"n/a"` | no |
+| <a name="input_skip_final_snapshot"></a> [skip\_final\_snapshot](#input\_skip\_final\_snapshot) | If true, no final snapshot is created on deletion. Should be false in production | `bool` | `false` | no |
+| <a name="input_snapshot_identifier"></a> [snapshot\_identifier](#input\_snapshot\_identifier) | Snapshot ID to restore the instance from. When set, character\_set\_name must be null | `string` | `null` | no |
+| <a name="input_stack"></a> [stack](#input\_stack) | ID element. The name of the stack/component, e.g. `database`, `web`, `waf`, `eks` | `string` | `null` | no |
+| <a name="input_storage_type"></a> [storage\_type](#input\_storage\_type) | One of 'standard', 'gp2', 'gp3', 'io1', or 'io2'. Defaults to 'io1' when iops is set, otherwise 'gp2' | `string` | `null` | no |
+| <a name="input_subnet_ids"></a> [subnet\_ids](#input\_subnet\_ids) | List of VPC subnet IDs for the DB subnet group | `list(string)` | n/a | yes |
+| <a name="input_tag_version"></a> [tag\_version](#input\_tag\_version) | Used to identify the tagging version in use | `string` | `"1.0"` | no |
+| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br/>Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
+| <a name="input_terraform_source"></a> [terraform\_source](#input\_terraform\_source) | Source location to record in the Terraform\_source tag. Defaults to this module path. | `string` | `null` | no |
+| <a name="input_timeouts"></a> [timeouts](#input\_timeouts) | Terraform resource management timeouts for the DB instance | <pre>object({<br/>    create = optional(string)<br/>    update = optional(string)<br/>    delete = optional(string)<br/>  })</pre> | `null` | no |
+| <a name="input_tool"></a> [tool](#input\_tool) | The tool used to deploy the resource | `string` | `"Terraform"` | no |
+| <a name="input_username"></a> [username](#input\_username) | Username for the master DB user | `string` | n/a | yes |
+| <a name="input_vpc_security_group_ids"></a> [vpc\_security\_group\_ids](#input\_vpc\_security\_group\_ids) | List of security group IDs to associate with the instance. Create the security group using the dedicated security group module and pass its ID here | `list(string)` | `[]` | no |
+| <a name="input_workspace"></a> [workspace](#input\_workspace) | ID element. The Terraform workspace, to help ensure generated IDs are unique across workspaces | `string` | `null` | no |
+
+## Outputs
+
+| Name | Description |
+| ---- | ----------- |
+| <a name="output_db_option_group_id"></a> [db\_option\_group\_id](#output\_db\_option\_group\_id) | ID of the DB option group |
+| <a name="output_db_parameter_group_id"></a> [db\_parameter\_group\_id](#output\_db\_parameter\_group\_id) | ID of the DB parameter group |
+| <a name="output_db_subnet_group_id"></a> [db\_subnet\_group\_id](#output\_db\_subnet\_group\_id) | Name/ID of the DB subnet group |
+| <a name="output_enhanced_monitoring_iam_role_arn"></a> [enhanced\_monitoring\_iam\_role\_arn](#output\_enhanced\_monitoring\_iam\_role\_arn) | ARN of the Enhanced Monitoring IAM role. Empty when monitoring\_interval is 0 |
+| <a name="output_instance_address"></a> [instance\_address](#output\_instance\_address) | Hostname of the RDS instance (without port) |
+| <a name="output_instance_arn"></a> [instance\_arn](#output\_instance\_arn) | ARN of the RDS instance |
+| <a name="output_instance_endpoint"></a> [instance\_endpoint](#output\_instance\_endpoint) | Connection endpoint for the RDS instance in host:port format |
+| <a name="output_instance_id"></a> [instance\_id](#output\_instance\_id) | Identifier of the RDS instance |
+| <a name="output_instance_port"></a> [instance\_port](#output\_instance\_port) | Port on which the RDS instance accepts connections |
+| <a name="output_instance_resource_id"></a> [instance\_resource\_id](#output\_instance\_resource\_id) | The RDS resource ID (used for IAM authentication and tagging) |
+| <a name="output_master_user_secret_arn"></a> [master\_user\_secret\_arn](#output\_master\_user\_secret\_arn) | ARN of the Secrets Manager secret for the master user password. Only populated when manage\_master\_user\_password is true |
+| <a name="output_rds_subnet_group"></a> [rds\_subnet\_group](#output\_rds\_subnet\_group) | The DB subnet group used by the RDS instance, with id and arn attributes |
+<!-- END_TF_DOCS -->
+<!-- markdownlint-restore -->
+<!-- vale on -->
diff --git a/infrastructure/modules/rds/context.tf b/infrastructure/modules/rds/context.tf
new file mode 100644
index 00000000..62befcb0
--- /dev/null
+++ b/infrastructure/modules/rds/context.tf
@@ -0,0 +1,376 @@
+# tflint-ignore-file: terraform_standard_module_structure, terraform_unused_declarations
+#
+# ONLY EDIT THIS FILE IN github.com/NHSDigital/screening-terraform-modules-aws/infrastructure/modules/tags
+# All other instances of this file should be a copy of that one
+#
+#
+# Copy this file from https://github.com/NHSDigital/screening-terraform-modules-aws/blob/master/infrastructure/modules/tags/exports/context.tf
+# and then place it in your Terraform module to automatically get
+# tag module standard configuration inputs suitable for passing
+# to other modules.
+#
+# curl -sL https://raw.githubusercontent.com/NHSDigital/screening-terraform-modules-aws/master/infrastructure/modules/tags/exports/context.tf -o context.tf
+#
+# Modules should access the whole context as `module.this.context`
+# to get the input variables with nulls for defaults,
+# for example `context = module.this.context`,
+# and access individual variables as `module.this.<var>`,
+# with final values filled in.
+#
+# For example, when using defaults, `module.this.context.delimiter`
+# will be null, and `module.this.delimiter` will be `-` (hyphen).
+#
+
+module "this" {
+  source = "../tags"
+
+  enabled             = var.enabled
+  service             = var.service
+  project             = var.project
+  region              = var.region
+  environment         = var.environment
+  stack               = var.stack
+  workspace           = var.workspace
+  name                = var.name
+  delimiter           = var.delimiter
+  attributes          = var.attributes
+  tags                = var.tags
+  additional_tag_map  = var.additional_tag_map
+  label_order         = var.label_order
+  regex_replace_chars = var.regex_replace_chars
+  id_length_limit     = var.id_length_limit
+  label_key_case      = var.label_key_case
+  label_value_case    = var.label_value_case
+  terraform_source    = coalesce(var.terraform_source, path.module)
+  descriptor_formats  = var.descriptor_formats
+  labels_as_tags      = var.labels_as_tags
+
+  context = var.context
+}
+
+# Copy contents of screening-terraform-modules-aws/tags/variables.tf here
+# tflint-ignore: terraform_unused_declarations
+variable "aws_region" {
+  type        = string
+  description = "The AWS region"
+  default     = "eu-west-2"
+  validation {
+    condition     = contains(["eu-west-1", "eu-west-2", "us-east-1"], var.aws_region)
+    error_message = "AWS Region must be one of eu-west-1, eu-west-2, us-east-1"
+  }
+}
+
+variable "context" {
+  type = any
+  default = {
+    enabled             = true
+    service             = null
+    project             = null
+    region              = null
+    environment         = null
+    stack               = null
+    workspace           = null
+    name                = null
+    delimiter           = null
+    attributes          = []
+    tags                = {}
+    additional_tag_map  = {}
+    regex_replace_chars = null
+    label_order         = []
+    id_length_limit     = null
+    label_key_case      = null
+    label_value_case    = null
+    terraform_source    = null
+    descriptor_formats  = {}
+    # Note: we have to use [] instead of null for unset lists due to
+    # https://github.com/hashicorp/terraform/issues/28137
+    # which was not fixed until Terraform 1.0.0,
+    # but we want the default to be all the labels in `label_order`
+    # and we want users to be able to prevent all tag generation
+    # by setting `labels_as_tags` to `[]`, so we need
+    # a different sentinel to indicate "default"
+    labels_as_tags = ["unset"]
+  }
+  description = <<-EOT
+    Single object for setting entire context at once.
+    See description of individual variables for details.
+    Leave string and numeric variables as `null` to use default value.
+    Individual variable settings (non-null) override settings in context object,
+    except for attributes, tags, and additional_tag_map, which are merged.
+  EOT
+
+  validation {
+    condition     = lookup(var.context, "label_key_case", null) == null ? true : contains(["lower", "title", "upper"], var.context["label_key_case"])
+    error_message = "Allowed values: `lower`, `title`, `upper`."
+  }
+
+  validation {
+    condition     = lookup(var.context, "label_value_case", null) == null ? true : contains(["lower", "title", "upper", "none"], var.context["label_value_case"])
+    error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
+  }
+}
+
+variable "terraform_source" {
+  type        = string
+  default     = null
+  description = "Source location to record in the Terraform_source tag. Defaults to this module path."
+}
+
+variable "enabled" {
+  type        = bool
+  default     = null
+  description = "Set to false to prevent the module from creating any resources"
+}
+
+variable "service" {
+  type        = string
+  default     = null
+  description = "ID element. Usually an abbreviation of your service directorate name, e.g. 'bcss' or 'csms', to help ensure generated IDs are globally unique"
+}
+
+variable "region" {
+  type        = string
+  default     = null
+  description = "ID element _(Rarely used, not included by default)_.  Usually an abbreviation of the selected AWS region e.g. 'uw2', 'ew2' or 'gbl' for resources like IAM roles that have no region"
+}
+
+variable "project" {
+  type        = string
+  default     = null
+  description = "ID element. A project identifier, indicating the name or role of the project the resource is for, such as `website` or `api`"
+}
+variable "stack" {
+  type        = string
+  default     = null
+  description = "ID element. The name of the stack/component, e.g. `database`, `web`, `waf`, `eks`"
+}
+variable "workspace" {
+  type        = string
+  default     = null
+  description = "ID element. The Terraform workspace, to help ensure generated IDs are unique across workspaces"
+}
+variable "environment" {
+  type        = string
+  default     = null
+  description = "ID element. Usually used to indicate role, e.g. 'prd', 'dev', 'test', 'preprod', 'prod', 'uat'"
+}
+
+variable "name" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.
+    This is the only ID element not also included as a `tag`.
+    The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.
+    EOT
+}
+
+variable "delimiter" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Delimiter to be used between ID elements.
+    Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.
+  EOT
+}
+
+variable "attributes" {
+  type        = list(string)
+  default     = []
+  description = <<-EOT
+    ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,
+    in the order they appear in the list. New attributes are appended to the
+    end of the list. The elements of the list are joined by the `delimiter`
+    and treated as a single ID element.
+    EOT
+}
+
+variable "labels_as_tags" {
+  type        = set(string)
+  default     = ["default"]
+  description = <<-EOT
+    Set of labels (ID elements) to include as tags in the `tags` output.
+    Default is to include all labels.
+    Tags with empty values will not be included in the `tags` output.
+    Set to `[]` to suppress all generated tags.
+    **Notes:**
+      The value of the `name` tag, if included, will be the `id`, not the `name`.
+      Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be
+      changed in later chained modules. Attempts to change it will be silently ignored.
+    EOT
+}
+
+variable "tags" {
+  type        = map(string)
+  default     = {}
+  description = <<-EOT
+    Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).
+    Neither the tag keys nor the tag values will be modified by this module.
+    EOT
+}
+
+variable "additional_tag_map" {
+  type        = map(string)
+  default     = {}
+  description = <<-EOT
+    Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.
+    This is for some rare cases where resources want additional configuration of tags
+    and therefore take a list of maps with tag key, value, and additional configuration.
+    EOT
+}
+
+variable "label_order" {
+  type        = list(string)
+  default     = null
+  description = <<-EOT
+    The order in which the labels (ID elements) appear in the `id`.
+    Defaults to ["namespace", "environment", "stage", "name", "attributes"].
+    You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.
+    EOT
+}
+
+variable "regex_replace_chars" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Terraform regular expression (regex) string.
+    Characters matching the regex will be removed from the ID elements.
+    If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.
+  EOT
+}
+
+variable "id_length_limit" {
+  type        = number
+  default     = null
+  description = <<-EOT
+    Limit `id` to this many characters (minimum 6).
+    Set to `0` for unlimited length.
+    Set to `null` for keep the existing setting, which defaults to `0`.
+    Does not affect `id_full`.
+  EOT
+  validation {
+    condition     = var.id_length_limit == null ? true : var.id_length_limit >= 6 || var.id_length_limit == 0
+    error_message = "The id_length_limit must be >= 6 if supplied (not null), or 0 for unlimited length."
+  }
+}
+
+variable "label_key_case" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Controls the letter case of the `tags` keys (label names) for tags generated by this module.
+    Does not affect keys of tags passed in via the `tags` input.
+    Possible values: `lower`, `title`, `upper`.
+    Default value: `title`.
+  EOT
+
+  validation {
+    condition     = var.label_key_case == null ? true : contains(["lower", "title", "upper"], var.label_key_case)
+    error_message = "Allowed values: `lower`, `title`, `upper`."
+  }
+}
+
+variable "label_value_case" {
+  type        = string
+  default     = null
+  description = <<-EOT
+    Controls the letter case of ID elements (labels) as included in `id`,
+    set as tag values, and output by this module individually.
+    Does not affect values of tags passed in via the `tags` input.
+    Possible values: `lower`, `title`, `upper` and `none` (no transformation).
+    Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.
+    Default value: `lower`.
+  EOT
+
+  validation {
+    condition     = var.label_value_case == null ? true : contains(["lower", "title", "upper", "none"], var.label_value_case)
+    error_message = "Allowed values: `lower`, `title`, `upper`, `none`."
+  }
+}
+
+variable "descriptor_formats" {
+  type        = any
+  default     = {}
+  description = <<-EOT
+    Describe additional descriptors to be output in the `descriptors` output map.
+    Map of maps. Keys are names of descriptors. Values are maps of the form
+    `{
+        format = string
+        labels = list(string)
+    }`
+    (Type is `any` so the map values can later be enhanced to provide additional options.)
+    `format` is a Terraform format string to be passed to the `format()` function.
+    `labels` is a list of labels, in order, to pass to `format()` function.
+    Label values will be normalized before being passed to `format()` so they will be
+    identical to how they appear in `id`.
+    Default is `{}` (`descriptors` output will be empty).
+    EOT
+}
+
+variable "owner" {
+  type        = string
+  description = "The name and or NHS.net email address of the service owner"
+  default     = "None"
+}
+
+variable "tag_version" {
+  type        = string
+  description = "Used to identify the tagging version in use"
+  default     = "1.0"
+}
+
+variable "data_classification" {
+  type        = string
+  description = "Used to identify the data classification of the resource, e.g 1-5"
+  default     = "n/a"
+  validation {
+    condition     = contains(["n/a", "1", "2", "3", "4", "5"], var.data_classification)
+    error_message = "Data Classification must be \"n/a\" or between 1-5"
+  }
+}
+
+variable "data_type" {
+  type        = string
+  description = "The tag data_type"
+  default     = "None"
+  validation {
+    condition     = contains(["None", "PCD", "PID", "Anonymised", "UserAccount", "Audit"], var.data_type)
+    error_message = "Data Type must be one of None, PCD, PID, Anonymised, UserAccount, Audit"
+  }
+}
+
+
+variable "public_facing" {
+  type        = bool
+  description = "Whether this resource is public facing"
+  default     = false
+}
+
+variable "service_category" {
+  type        = string
+  description = "The tag service_category"
+  default     = "n/a"
+  validation {
+    condition     = contains(["n/a", "Bronze", "Silver", "Gold", "Platinum"], var.service_category)
+    error_message = "The Service Category must be one of n/a, Bronze, Silver, Gold, Platinum"
+  }
+}
+variable "on_off_pattern" {
+  type        = string
+  description = "Used to turn resources on and off based on a time pattern"
+  default     = "n/a"
+}
+
+variable "application_role" {
+  type        = string
+  description = "The role the application is performing"
+  default     = "General"
+}
+
+variable "tool" {
+  type        = string
+  description = "The tool used to deploy the resource"
+  default     = "Terraform"
+}
+
+#### End of copy of screening-terraform-modules-aws/tags/variables.tf
diff --git a/infrastructure/modules/rds/locals.tf b/infrastructure/modules/rds/locals.tf
new file mode 100644
index 00000000..0f350376
--- /dev/null
+++ b/infrastructure/modules/rds/locals.tf
@@ -0,0 +1,4 @@
+locals {
+  # Prefer explicit caller names when provided, otherwise derive from context labels.
+  rds_identifier = coalesce(var.custom_name, var.identifier, module.this.id)
+}
diff --git a/infrastructure/modules/rds/main.tf b/infrastructure/modules/rds/main.tf
new file mode 100644
index 00000000..32c8cfce
--- /dev/null
+++ b/infrastructure/modules/rds/main.tf
@@ -0,0 +1,90 @@
+# ----------------------------------------------------------------------------
+# RDS instance
+#
+# Wraps terraform-aws-modules/rds/aws v7.2.0.
+#
+# Fixed controls (not exposed as variables):
+#   - publicly_accessible   = false  (databases must never be internet-facing)
+#   - storage_encrypted     = true   (encryption at rest is mandatory)
+#   - copy_tags_to_snapshot = true   (snapshots must carry the same tags)
+#   - auto_minor_version_upgrade = false (teams keep instances in sync with prod)
+#   - create_db_subnet_group = true  (subnet group always managed by this module)
+# ----------------------------------------------------------------------------
+module "rds" {
+  source  = "terraform-aws-modules/rds/aws"
+  version = "7.2.0"
+
+  create_db_instance        = module.this.enabled
+  create_db_subnet_group    = module.this.enabled
+  create_db_parameter_group = module.this.enabled
+  create_db_option_group    = module.this.enabled
+
+  identifier = local.rds_identifier
+
+  # Engine
+  engine             = var.engine
+  engine_version     = var.engine_version
+  license_model      = var.license_model
+  character_set_name = var.character_set_name
+
+  # Instance sizing
+  instance_class        = var.instance_class
+  allocated_storage     = var.allocated_storage
+  max_allocated_storage = var.max_allocated_storage
+  storage_type          = var.storage_type
+  iops                  = var.iops
+  storage_encrypted     = true
+  kms_key_id            = var.kms_key_id
+
+  # Database
+  db_name  = var.db_name
+  username = var.username
+  port     = var.port
+
+  # Credentials
+  manage_master_user_password = var.manage_master_user_password
+  password_wo                 = var.password_wo
+  password_wo_version         = var.password_wo_version
+
+  # Networking
+  publicly_accessible    = false
+  vpc_security_group_ids = var.vpc_security_group_ids
+
+  # Subnet group (always managed by this module)
+  subnet_ids = var.subnet_ids
+
+  # Parameter group
+  family     = var.family
+  parameters = var.parameters
+
+  # Option group
+  major_engine_version = var.major_engine_version
+  options              = var.options
+
+  # Monitoring
+  monitoring_interval    = var.monitoring_interval
+  create_monitoring_role = module.this.enabled && var.monitoring_interval > 0
+
+  # Availability and backup
+  multi_az                   = var.multi_az
+  backup_retention_period    = var.backup_retention_period
+  backup_window              = var.backup_window
+  maintenance_window         = var.maintenance_window
+  skip_final_snapshot        = var.skip_final_snapshot
+  snapshot_identifier        = var.snapshot_identifier
+  apply_immediately          = var.apply_immediately
+  copy_tags_to_snapshot      = true
+  auto_minor_version_upgrade = false
+
+  # Performance Insights
+  performance_insights_enabled          = var.performance_insights_enabled
+  performance_insights_retention_period = var.performance_insights_enabled ? var.performance_insights_retention_period : null
+  performance_insights_kms_key_id       = var.performance_insights_kms_key_id
+
+  # Lifecycle
+  deletion_protection = var.deletion_protection
+
+  timeouts = var.timeouts
+
+  tags = module.this.tags
+}
diff --git a/infrastructure/modules/rds/outputs.tf b/infrastructure/modules/rds/outputs.tf
new file mode 100644
index 00000000..7d642c75
--- /dev/null
+++ b/infrastructure/modules/rds/outputs.tf
@@ -0,0 +1,70 @@
+# Instance connection details
+
+output "instance_address" {
+  description = "Hostname of the RDS instance (without port)"
+  value       = module.rds.db_instance_address
+}
+
+output "instance_port" {
+  description = "Port on which the RDS instance accepts connections"
+  value       = module.rds.db_instance_port
+}
+
+output "instance_endpoint" {
+  description = "Connection endpoint for the RDS instance in host:port format"
+  value       = module.rds.db_instance_endpoint
+}
+
+output "instance_id" {
+  description = "Identifier of the RDS instance"
+  value       = module.rds.db_instance_identifier
+}
+
+output "instance_arn" {
+  description = "ARN of the RDS instance"
+  value       = module.rds.db_instance_arn
+}
+
+output "instance_resource_id" {
+  description = "The RDS resource ID (used for IAM authentication and tagging)"
+  value       = module.rds.db_instance_resource_id
+}
+
+output "master_user_secret_arn" {
+  description = "ARN of the Secrets Manager secret for the master user password. Only populated when manage_master_user_password is true"
+  value       = module.rds.db_instance_master_user_secret_arn
+}
+
+# Subnet group
+
+output "rds_subnet_group" {
+  description = "The DB subnet group used by the RDS instance, with id and arn attributes"
+  value = {
+    id  = module.rds.db_subnet_group_id
+    arn = module.rds.db_subnet_group_arn
+  }
+}
+
+output "db_subnet_group_id" {
+  description = "Name/ID of the DB subnet group"
+  value       = module.rds.db_subnet_group_id
+}
+
+# Parameter and option groups
+
+output "db_parameter_group_id" {
+  description = "ID of the DB parameter group"
+  value       = module.rds.db_parameter_group_id
+}
+
+output "db_option_group_id" {
+  description = "ID of the DB option group"
+  value       = module.rds.db_option_group_id
+}
+
+# Monitoring
+
+output "enhanced_monitoring_iam_role_arn" {
+  description = "ARN of the Enhanced Monitoring IAM role. Empty when monitoring_interval is 0"
+  value       = module.rds.enhanced_monitoring_iam_role_arn
+}
diff --git a/infrastructure/modules/rds/variables.tf b/infrastructure/modules/rds/variables.tf
new file mode 100644
index 00000000..83bee1b3
--- /dev/null
+++ b/infrastructure/modules/rds/variables.tf
@@ -0,0 +1,266 @@
+# ----------------------------------------------------------------------------
+# Instance identity
+# ----------------------------------------------------------------------------
+
+variable "identifier" {
+  description = "Explicit name for the RDS instance. If null, this module derives the name from context labels."
+  type        = string
+  default     = null
+}
+
+variable "custom_name" {
+  description = "Optional override name for the RDS instance. Takes precedence over identifier when set."
+  type        = string
+  default     = null
+}
+
+# ----------------------------------------------------------------------------
+# Engine
+# ----------------------------------------------------------------------------
+
+variable "engine" {
+  description = "The database engine to use (e.g. 'oracle-ee', 'postgres', 'mysql')"
+  type        = string
+}
+
+variable "engine_version" {
+  description = "The engine version to use"
+  type        = string
+}
+
+variable "license_model" {
+  description = "License model for the DB instance. Required for some engines (e.g. Oracle SE1 requires 'license-included')"
+  type        = string
+  default     = null
+}
+
+variable "character_set_name" {
+  description = "Oracle character set name. Cannot be changed after creation. Must be null when restoring from a snapshot"
+  type        = string
+  default     = null
+}
+
+# ----------------------------------------------------------------------------
+# Instance sizing
+# ----------------------------------------------------------------------------
+
+variable "instance_class" {
+  description = "The instance type of the RDS instance (e.g. 'db.m5.large')"
+  type        = string
+}
+
+variable "allocated_storage" {
+  description = "The allocated storage in gibibytes"
+  type        = number
+}
+
+variable "max_allocated_storage" {
+  description = "Upper limit for storage autoscaling in gibibytes. Set to 0 to disable autoscaling"
+  type        = number
+  default     = 0
+}
+
+variable "storage_type" {
+  description = "One of 'standard', 'gp2', 'gp3', 'io1', or 'io2'. Defaults to 'io1' when iops is set, otherwise 'gp2'"
+  type        = string
+  default     = null
+}
+
+variable "iops" {
+  description = "Provisioned IOPS. Required when storage_type is 'io1' or 'io2'"
+  type        = number
+  default     = null
+}
+
+variable "kms_key_id" {
+  description = "ARN of the KMS key for storage encryption. If omitted, the default account KMS key is used"
+  type        = string
+  default     = null
+}
+
+# ----------------------------------------------------------------------------
+# Credentials
+# ----------------------------------------------------------------------------
+
+variable "username" {
+  description = "Username for the master DB user"
+  type        = string
+  sensitive   = true
+}
+
+variable "password_wo" {
+  description = "Write-only password for the master DB user. Required when manage_master_user_password is false and snapshot_identifier is not set"
+  type        = string
+  default     = null
+  sensitive   = true
+}
+
+variable "password_wo_version" {
+  description = "Increment this value to trigger a password rotation when password_wo changes"
+  type        = number
+  default     = 1
+}
+
+variable "manage_master_user_password" {
+  description = "When true, RDS manages the master password in Secrets Manager. When false, password_wo must be provided"
+  type        = bool
+  default     = false
+}
+
+# ----------------------------------------------------------------------------
+# Database
+# ----------------------------------------------------------------------------
+
+variable "db_name" {
+  description = "The name of the database to create. Omit to skip initial database creation"
+  type        = string
+  default     = null
+}
+
+variable "port" {
+  description = "The port on which the DB accepts connections"
+  type        = number
+}
+
+# ----------------------------------------------------------------------------
+# Networking
+# ----------------------------------------------------------------------------
+
+variable "subnet_ids" {
+  description = "List of VPC subnet IDs for the DB subnet group"
+  type        = list(string)
+}
+
+variable "vpc_security_group_ids" {
+  description = "List of security group IDs to associate with the instance. Create the security group using the dedicated security group module and pass its ID here"
+  type        = list(string)
+  default     = []
+}
+
+# ----------------------------------------------------------------------------
+# Parameter group
+# ----------------------------------------------------------------------------
+
+variable "family" {
+  description = "DB parameter group family (e.g. 'oracle-ee-19', 'postgres16', 'mysql8.0')"
+  type        = string
+}
+
+variable "parameters" {
+  description = "List of DB parameters to apply to the parameter group"
+  type = list(object({
+    name         = string
+    value        = string
+    apply_method = optional(string)
+  }))
+  default = []
+}
+
+# ----------------------------------------------------------------------------
+# Option group
+# ----------------------------------------------------------------------------
+
+variable "major_engine_version" {
+  description = "Major engine version for the option group (e.g. '19' for Oracle 19c)"
+  type        = string
+}
+
+variable "options" {
+  description = "List of option group options to apply. See the community module documentation for the full object shape"
+  type        = any
+  default     = []
+}
+
+# ----------------------------------------------------------------------------
+# Availability and backup
+# ----------------------------------------------------------------------------
+
+variable "multi_az" {
+  description = "Specifies if the RDS instance is Multi-AZ"
+  type        = bool
+  default     = false
+}
+
+variable "backup_retention_period" {
+  description = "Number of days to retain automated backups. Must be between 0 and 35"
+  type        = number
+  default     = 7
+}
+
+variable "backup_window" {
+  description = "Daily UTC time range for automated backups (e.g. '23:00-23:30'). Must not overlap with maintenance_window"
+  type        = string
+  default     = "23:00-23:30"
+}
+
+variable "maintenance_window" {
+  description = "Weekly maintenance window (e.g. 'Sun:00:00-Sun:03:00')"
+  type        = string
+  default     = "Sun:00:00-Sun:03:00"
+}
+
+variable "skip_final_snapshot" {
+  description = "If true, no final snapshot is created on deletion. Should be false in production"
+  type        = bool
+  default     = false
+}
+
+variable "snapshot_identifier" {
+  description = "Snapshot ID to restore the instance from. When set, character_set_name must be null"
+  type        = string
+  default     = null
+}
+
+variable "apply_immediately" {
+  description = "Apply modifications immediately rather than deferring to the next maintenance window"
+  type        = bool
+  default     = false
+}
+
+# ----------------------------------------------------------------------------
+# Monitoring and performance
+# ----------------------------------------------------------------------------
+
+variable "monitoring_interval" {
+  description = "Interval in seconds between Enhanced Monitoring data points. Valid values: 0, 1, 5, 10, 15, 30, 60. Set to 0 to disable"
+  type        = number
+  default     = 5
+}
+
+variable "performance_insights_enabled" {
+  description = "Enable Performance Insights"
+  type        = bool
+  default     = true
+}
+
+variable "performance_insights_retention_period" {
+  description = "Retention period for Performance Insights data in days. Valid values: 7, 731, or a multiple of 31"
+  type        = number
+  default     = 7
+}
+
+variable "performance_insights_kms_key_id" {
+  description = "ARN of the KMS key used to encrypt Performance Insights data. If omitted, the default KMS key is used"
+  type        = string
+  default     = null
+}
+
+# ----------------------------------------------------------------------------
+# Lifecycle
+# ----------------------------------------------------------------------------
+
+variable "deletion_protection" {
+  description = "Prevents the DB instance from being deleted when true. Should be true in production"
+  type        = bool
+  default     = true
+}
+
+variable "timeouts" {
+  description = "Terraform resource management timeouts for the DB instance"
+  type = object({
+    create = optional(string)
+    update = optional(string)
+    delete = optional(string)
+  })
+  default = null
+}
diff --git a/infrastructure/modules/rds/versions.tf b/infrastructure/modules/rds/versions.tf
new file mode 100644
index 00000000..cb30fe5c
--- /dev/null
+++ b/infrastructure/modules/rds/versions.tf
@@ -0,0 +1,10 @@
+terraform {
+  required_version = ">= 1.13"
+
+  required_providers {
+    aws = {
+      source  = "hashicorp/aws"
+      version = ">= 6.42"
+    }
+  }
+}