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National Insurance calculator

Quickly calculate how much you owe in National Insurance if you're earning money from employment or self-employment.

Your situation

Outlined number oneImage of an arrow
Self-employed income
£
Self-employed expenses
?
£
How did you make money?

Tax and profit

Outlined number two
  • Total earnings
    £49,000
    £1,000 tax-free Trading Allowance
    ?
  • NI contributions
    £2,126
    Class 4 NI: £2,126
  • Income tax
    £7,086
  • What you’re left with
    £39,788

How your National Insurance contributions are calculated

When you’re self-employed, you have to pay your National Insurance contributions yourself in your annual Self Assessment, together with any income tax you might owe.

National Insurance breakdown

You pay no NI contributions on the first £12,570 that you make.

You will also have to pay £2,126 (6%) on your income between £12,570 and £48,000.

Stay on top of National Insurance changes

Whether you’re employed or self-employed, you’ll likely have to pay National Insurance to qualify for certain state benefits.

Consult with an accredited tax accountant in a 30 minute, 1-1 tax advice session to stay on top of it.

What is National Insurance?

National Insurance is a tax that we all have to pay in the UK to be entitled to claim certain state provided benefits. You have to pay it whether you’re employed or self-employed – although the type (or class) that you pay is determined by your employment status. 

Here are some of the benefits that you’re entitled to as a result of paying National Insurance:

  • Job Seeker’s Allowance
  • State Pension
  • Use of the NHS
  • Maternity Allowance
  • Statutory sick pay

What do I pay?

Well, of course, you could just use our National Insurance calculator above to see exactly what you’ll end up paying, but if you’d like a breakdown of the rates, check out the table below.

NI class Who pays? How? How much?
Class 1 Employees earning over £12,570 Deducted from salary 8% (or 2% if you earn over £242 per week)
Class 1A/1B Employers Paid via PAYE 13.8%
Class 2 Abolished from the 2024/25 tax year
Class 3 Voluntary contributions Direct Debit £17.45 per week
Class 4 Self-employed earning over £12,570 Self assessment 6% (or 2% if you earn over £50,270)

Wow, the 2022/23 calculation looks weird…

Well, let’s say 2022 was a weird year. After four chancellors, three prime ministers and numerous mini and maxi financial budgets, the National Insurance rate changed quite a lot of times. As a result, your calculation isn’t as straightforward as it is in more stable tax years. Take a look at our blog on the 2022 budget to see what happened.

Do I pay National Insurance if I earn less than the Personal Allowance?

No, not from the 2024/25 tax year.

When you earn less than £12,570 in a tax year, you’re now exempt from paying both Income Tax and National Insurance. The first £12,570 of your income is known as the Personal Allowance. You don’t pay Income Tax on it unless you earn over £100,000, at which point you start to lose your eligibility to it. 

The table above shows you how much National Insurance you’ll owe based on your earnings.

Still got questions?

Calculating your tax is one thing, but there’s nothing like speaking to a real, human expert, right? Get matched with your very own accredited accountant who will file your tax return and also give you a one-off tax advice consultation. Just £269, all in. 

Looking for tax help?

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