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Class 4 National Insurance: how much do you need to pay?

  • 1 min read
  • Last updated 10 May 2022

You need to pay Class 4 National Insurance contributions if you’re self-employed and earning over £9,501 a year (in 2020/21).

Most people pay it through your Self Assessment tax return bill.

How much do I need to pay?

In the 2022/23 tax year, your Class 4 National Insurance contributions are:

  • 10.25% per week on profits over £12,570 from July 2023 (and 10.25% on profits above £9,880 between April and July)
  • 3.25% on profits over £50,270.

This is on top of your Class 2 National Insurance contributions (about £3.15 a week).

National Insurance calculator – give it a go!

Annual self-employment income
£
Self-employment expenses
£
Select tax year
How NI is calculated on your income
No contributions
£9,500
At 9%
£39,500
NI contributions you need to make
£3,714
Class 2 NI: £159
No Class 4 NI on your first £9,500
Class 4 NI at 9% on your next £39,500: £3,555
You also need to pay income tax
£7,300
View how the income tax is calculated

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How your National Insurance contributions are calculated

As a self-employed you have to pay your National Insurance contributions yourself during your annual Self Assessment, together with any income tax you might owe.

National Insurance breakdown

You pay no NI contributions on the first £9,500 that you make.

You will need to pay Class 2 NI worth £159.

You will also have to pay £3,555 (9%) on your income between £9,500 and £49,000.

How can I pay it?

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