Form

Apply to pay voluntary Class 3 National Insurance contributions

Paying Class 3 contributions can close gaps in your National Insurance record which could benefit you, find out when you should make them and how to pay using form CA5603.

Documents

Apply to pay voluntary Class 3 National Insurance contributions

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Details

Use form C5603 to apply to pay voluntary Class 3 National Insurance contributions.

Paying voluntary contributions can close gaps in your National Insurance record but there are time limits for doing this. The form explains:

  • how paying could help you
  • when you should not make payments
  • who can make payments
  • time limits
  • how to pay
  • how to apply for a refund

It will also help you find out:

  • how many qualifying years you have for your State Pension
  • if paying will increase the amount you’ll get

Please send the completed form to:

National Insurance Contributions and Employer Office
HM Revenue and Customs
BX9 1AN

Updates to this page

Published 4 April 2014
Last updated 26 September 2018 + show all updates
  1. The option to pay by quarterly bill has been added to the form.

  2. English and Welsh versions of the form have been updated with new contact details for the Future Pension Centre, information about voluntary contributions and revised payment methods.

  3. Rates, allowances and duties have been updated for the tax year 2017 to 2018.

  4. Rates, allowances and duties have been updated for the tax year 2016 to 2017.

  5. Amendments to PDF to ensure factual accuracy and to reflect legislative change.

  6. Rates, allowances and duties have been updated for the tax year 2015 to 2016.

  7. Added translation

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