Income Tax Calculator
Enter your salary for the 2026/27 tax year (6 April 2026 to 5 April 2027). It works out income tax, National Insurance and student loan, including the effect of salary sacrifice and SIPP contributions. England, Wales and Northern Ireland rates.
Your marginal rate
Of each extra £1 of salary, how much goes on income tax, NI and student loan, with your pension and loan settings held the same. The marker is you.
Monthly payslip
Annual figures ÷ 12. Bonus months will look different
Rules applied
- Personal allowance £12,570. It drops by £1 for every £2 of adjusted net income over £100,000 and is gone at £125,140, which makes the effective rate in that band 60% (62% with NI).
- Income tax 20% on the first £37,700 of taxable income, 40% up to £125,140, 45% above.
- Employee NI (Class 1) 8% on earnings between £12,570 and £50,270, 2% above. Worked out on an annual basis; payroll does it per pay period, so a bonus month can differ a little. Benefits in kind don't attract employee NI.
- Salary sacrifice comes off your pay before tax, NI and student loan are worked out, so you save all three. Your employer also saves 15% employer NI on it.
- SIPP (relief at source). You pay 80%, the provider claims 20% from HMRC. The gross amount also widens your basic and higher rate bands and reduces adjusted net income, which can restore the personal allowance above £100k. The extra relief over 20% is claimed through self-assessment, shown here as a reclaim.
- Student loan 9% over the threshold: Plan 1 £26,900, Plan 2 £29,385, Plan 4 £33,795, Plan 5 £25,000. Postgraduate loan 6% over £21,000, on top of any undergraduate plan.
- Employer NI 15% over £5,000, shown for context. It isn't deducted from your pay.
- Not covered. Scottish income tax rates, savings interest, dividends, capital gains, self-employed or rental income, the High Income Child Benefit Charge, and tax code adjustments for things like underpayments from earlier years.
- This is an estimate to check your payslip and self-assessment against, not tax advice.