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National Insurance

Overview

This API retrieves an annual summary of an individual taxpayer's class 1 total earnings and class 2 National Insurance contributions due for a given tax year.

Its primary use is for the calculation of a self-employed taxpayer's National Insurance liability within the Self Assessment tax calculation.

The sandbox endpoint is https://test-api.service.hmrc.gov.uk.

Documentation

National Insurance documentation

Endpoint

https://api.service.hmrc.gov.uk

Contact

SDSTeam@hmrc.gov.uk