Self Assessment Tax Calculator UK 2026/27
Estimate your Self Assessment tax liability for 2026/27.
£
£
£
| Item | Annual |
|---|---|
| Total Taxable Income | £35,000 |
| Income Tax | −£4,486 |
| Class 2 NI (£3.45/week × 52) | −£179 |
| Class 4 NI | −£1,346 |
| Take-Home (after all tax) | £28,989 |
Payments on Account: Your tax bill exceeds £1,000, so HMRC requires advance payments of £3,006 in January and £3,006 in July.
2025/26 rates. England, Wales & Northern Ireland only. Assumes standard personal allowance.
Self Assessment is the system HMRC uses to collect income tax from people with income not taxed at source. Use the main Salary Take Home UK above to estimate your tax liability based on your total income.
How It Works
Self Assessment calculates your income tax, Class 4 National Insurance (if self-employed), and any other tax owed for the tax year.
Self-employed Class 4 NI rates 2026/27:
- 6% on profits between £12,570 and £50,270
- 2% on profits above £50,270
Class 2 NI (fixed rate): £3.45 per week (if profits exceed £12,570)
Use our main Salary Take Home UK to estimate income tax. For the full Self Assessment picture, consult HMRC's official calculator or a tax accountant.