Self-Employed Tax Calculator UK 2026/27
Use our free UK Self-Employed Tax Calculator to instantly estimate your take-home pay, National Insurance contributions (Class 2 & 4), and total income tax liability for 2026/2027. Calculate the true cost of being a Sole Trader.
Your Details
Enter your annual earnings for the year.
Total Year Take Home
£0
Net Cash after Tax & NI
Estimates based on 2026/27 tax rates for a UK resident in England or Northern Ireland. Does not include Student Loan repayments or Payments on Account.
Could you save by incorporating?
See how your current earnings would look if you operated as a Limited Company instead.
Estimates only. Actual savings depend on salary levels, expenses, and retained profits.
Why switch your accounting to AJH Financial?
We don't just calculate your tax; we help you minimize it. Our proactive approach ensures you maximize every allowance you're entitled to.
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Quarterly checks to explain your position.
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What is Self-Employed Tax in the UK?
Self-employed tax is the income tax and National Insurance (NI) you pay on your business profits in the UK. If you are a sole trader, you pay income tax via the Self Assessment tax return system. This tax is calculated after deducting all allowable business expenses from your gross income, meaning you strictly pay tax on your net profits.
How to calculate self-employed tax: 1. Record your gross income for the tax year. 2. Deduct allowable business expenses to find your net profit. 3. Apply your Tax-Free Personal Allowance (currently £12,570). 4. Calculate Income tax (20% basic, 40% higher) and required National Insurance contributions.
The UK tax year runs from 6 April to 5 April. Using professional Sole Trader Accountants to ensure your allowances are fully utilized guarantees you retain maximum earnings without overpaying HMRC.
Frequently Asked Questions
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These figures use 2026/27 rates for England and Northern Ireland and only the details you have typed in. Scotland and Wales set some of their own rates, and allowances, reliefs, other income and your tax code can all change the answer considerably.
We check the rates behind these tools against GOV.UK and believe them correct to the best of our knowledge, but we cannot guarantee the result is accurate for your circumstances and do not accept responsibility for decisions made on it. Please do not file a return or commit to anything on this figure alone — do your own research, and speak to a qualified accountant who can see your full position.
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Open itWant someone to check this properly?
Send us the numbers and one of our accountants will tell you what the real position looks like. Fixed fees, agreed up front, and the first conversation costs nothing.