Estimate your Income Tax and Class 4 National Insurance for the 2026/27 tax year (6 April 2026 to 5 April 2027), based on your self-employed profit. Our free UK tax calculator is built by chartered accountants for sole traders, freelancers, and contractors.
This calculator gives an estimate only and uses standard England, Wales & Northern Ireland rates. It does not account for Scottish rates, Gift Aid, pension contributions, Marriage Allowance, or other reliefs. For an exact figure tailored to your situation, book a free consultation.
The first £12,570 of your income is tax-free, reducing by £1 for every £2 earned over £100,000.
20% Basic rate up to £50,270, 40% Higher rate up to £125,140, and 45% Additional rate above that.
6% on profits between £12,570 and £50,270, and 2% on profits above £50,270. Class 2 NI no longer applies.