UK Self-Employed Tax Calculator
Estimate your self-assessment tax bill
Calculate income tax, National Insurance and take-home profit for the 2026/27 tax year.
Total income minus allowable business expenses.
Monthly profit before tax
£5,000.00
Estimated monthly net
£3,842.62
Common amounts:
Your estimated tax and take-home profit
Estimate based on self-employed profit for the tax year. Your actual tax bill may differ if you have other income or expenses.
Payments on Account
£6,944.30
HMRC may ask you to pay this in advance towards next year's bill. Usually due in two instalments: 31 Jan and 31 Jul.
Tax Breakdown
Income
Tax and National Insurance
Key Deadlines
5 Oct
Register
31 Jan
File & Pay
31 Jul
2nd Payment
About the Self-Employed Tax Calculator
Use this UK self-employed tax calculator to estimate your Income Tax, National Insurance and take-home profit for the 2026/27 tax year.
Enter your annual business profit after allowable expenses to see an estimate of your tax bill, Class 2 NI, Class 4 NI and net income.
The calculator can also help you understand possible payments on account, which HMRC may ask you to pay in advance towards your next tax bill.
This tool is designed for freelancers, sole traders and self-employed individuals in England, Wales and Northern Ireland.