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National Insurance: detailed information

Guidance on National Insurance, including how to get a National Insurance number and check your record. As well as rates, paying, refunds, voluntary contributions and pensions.

• From: HM Revenue & Customs, Department for Work and Pensions and HM Treasury
• Published: 8 February 2024

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• National Insurance: introduction
  • Guide

Check your record online

• Check your National Insurance record
  • Transaction

National Insurance numbers

• Find your National Insurance number
  • Answer
• Apply for a National Insurance number
  • Guide
• Get a National Insurance number for a looked after child
  • 2 January 2025
  • Guidance

Rates

• National Insurance rates and categories
  • Guide
• Self-employed National Insurance rates
  • Answer
• Reduced rate National Insurance for married women
  • Answer

Paying and refunds

• Pay voluntary Class 2 National Insurance contributions if you do not pay through Self Assessment
  • Guide
• Pay voluntary Class 3 National Insurance
  • Guide
• Paying voluntary National Insurance contributions if you’ve worked or lived abroad
  • Guide
• Check how to claim a National Insurance refund
  • Simple smart answer
• National Insurance credits
  • Guide
• National Insurance if you work abroad
  • Answer

Voluntary contributions

• Voluntary National Insurance
  • Guide

Pensions

• National Insurance and tax after State Pension age
  • Guide
• Additional State Pension
  • Guide