Money

National Insurance in the UK: Who Pays and Why It Matters

2 min read

In this guide
  1. Quick answer
  2. Who pays and who is protected?
  3. Why you need your National Insurance number
  4. When do you stop paying?
  5. Common mistakes
  6. FAQ
    1. Is it the same as income tax?
  7. Key takeaways
  8. Related guides
  9. Sources

Look at your first UK payslip and you will see a deduction called National Insurance contributions. They count toward the State Pension and some benefits, so it matters who pays and how your record is built. This guide uses the figures published on GOV.UK in October 2026.

Quick answer

  • You pay mandatory National Insurance if you are 16 or over and either an employee earning more than £242 per week from one job, or self-employed with profits above £12,570 a year.
  • If you earn between £129 and £242 a week as an employee, or have self-employed profits of £7,105 or more, you usually do not pay but your record is protected.
  • Voluntary contributions may fill gaps.

Who pays and who is protected?

Situation Result
Employee earning over £242 per week from one job Pays
Self-employed, profit over £12,570 a year Pays
Employee earning £129 to £242 per week No payment, but contributions treated as paid
Self-employed, profit £7,105 or more No payment, but contributions treated as paid

Why you need your National Insurance number

It makes sure contributions and tax are recorded against your name only. Read how to get one in our National Insurance number guide.

When do you stop paying?

Employees stop paying Class 1 contributions at State Pension age. Self-employed people stop paying Class 4 from 6 April after reaching State Pension age. There are different classes depending on your employment status and income.

Common mistakes

  • Thinking National Insurance and Income Tax are the same.
  • Ignoring gaps in your record. See State Pension qualifying years.
  • Paying voluntarily without checking you need to.

FAQ

Is it the same as income tax?

No. See UK Income Tax rates.

Key takeaways

  • Check your payslip.
  • Protect your record.
  • Consider voluntary contributions for gaps.

Last updated: October 2026. General information, not tax advice. Thresholds change each tax year, so confirm on GOV.UK.

Sources

  • GOV.UK: National Insurance

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