UK Income Tax Calculator (2025/26 Estimate)
Use this quick calculator to estimate UK income tax, National Insurance, and your annual/monthly take-home pay.
How to calculate income tax in the UK
When people search for “calculate income tax in UK,” they usually want one thing: a clear estimate of what they will actually keep from their salary. The UK system can feel complicated because tax is not a single deduction. You often have multiple deductions at once:
- Income Tax
- National Insurance (NI)
- Student loan repayments (if applicable)
- Pension contributions
The calculator above gives a practical estimate for the 2025/26 tax year and helps you see your total deductions in one place.
UK tax bands used in this calculator (2025/26 estimate)
England, Wales, and Northern Ireland
| Taxable Band | Rate |
|---|---|
| Personal Allowance (usually first £12,570) | 0% |
| Basic Rate (next £37,700 taxable income) | 20% |
| Higher Rate (next £87,440 taxable income) | 40% |
| Additional Rate (remaining taxable income) | 45% |
Scotland
| Taxable Band | Rate |
|---|---|
| Starter | 19% |
| Basic | 20% |
| Intermediate | 21% |
| Higher | 42% |
| Advanced | 45% |
| Top | 48% |
Step-by-step method to estimate tax
1) Start with your gross annual income
Combine your salary and other taxable income. If you make salary sacrifice pension contributions, deduct those from employment income first.
2) Work out your Personal Allowance
Most people get a £12,570 Personal Allowance. If adjusted net income is above £100,000, your allowance is reduced by £1 for every £2 over £100,000 until it reaches zero.
3) Calculate taxable income
Taxable income = total income after salary sacrifice minus Personal Allowance.
4) Apply income tax bands
Apply each tax rate to the relevant slice of taxable income, not your whole income.
5) Add National Insurance
Employees normally pay NI on employment income above the NI threshold. This calculator applies annual thresholds and rates for an estimate.
6) Add student loan deductions (if any)
Repayments are based on income above your plan threshold. Different plans have different thresholds.
Common mistakes people make
- Taxing all income at one rate: UK tax is progressive, so each band is taxed separately.
- Ignoring NI: Many people calculate income tax only and forget NI, which materially changes take-home pay.
- Forgetting Personal Allowance taper: Income above £100,000 can significantly increase effective tax.
- Not accounting for pension salary sacrifice: Salary sacrifice can reduce both income tax and NI.
Tips to legally reduce your tax bill
- Increase pension contributions (especially via salary sacrifice where available).
- Use ISAs to shelter savings and investment returns from tax.
- Claim all allowable expenses if self-employed.
- Check your tax code and update HMRC if your circumstances changed.
- Use marriage allowance or other reliefs if you qualify.
Final note
This page is designed for quick planning and education. Real payroll outcomes can differ due to tax code adjustments, benefits in kind, bonus timing, weekly/monthly payroll calculations, and specific reliefs. For major financial decisions, verify figures with HMRC guidance or a qualified tax adviser.