2026/27 tax year
Self-Assessment Tax Calculator
Enter your self-employed income and expenses to see your Income Tax, Class 4 National Insurance, and what you're left with - for England, Wales and Northern Ireland.
£
per year£
per year£
per year£
per yearStudent loan plan
Only self-employment and other non-employment income is covered here. If you also have PAYE employment income, HMRC combines the two using rules this calculator doesn't model - speak to an accountant for an exact figure. Class 4 National Insurance is charged on trading profit only, not on other income or pension contributions.
Trading profit£0
Total taxable income£0
Personal Allowance£12,570
Income Tax£0
Class 4 National Insurance£0
Effective tax rate0.0%
What you're left with
£0