Skip to main content
Table of contents

National Insurance

Endpoint URL:

Documentation URL:

Contact:

  • SDSTeam@hmrc.gov.uk

Description:

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.