Relief At Source API

Version and status
Available in Sandbox Yes
Sandbox base URL
Available in Production Yes
Production base URL


Check a pension scheme member residency for tax purposes. Pension scheme administrators need this for relief at source claims.

Before you start

You will need the pension scheme member’s:

  • full name
  • date of birth
  • National Insurance number



You can use the sandbox environment to test this API.

It does not currently support stateful behaviour, but you can use the payloads described in Resources to test specific scenarios.

You must set up a test user which is an organisation for this API using the Create Test User API.



View API endpoints
Why do these endpoints look different?

The endpoints for this API now use the Open API Specification (OAS).

The API has not changed. You do not need to make any updates to your application if you already use this API.