UK Tax and NI Calculator
This UK Tax and NI Calculator estimates your Income Tax and National Insurance contributions based on your gross employment income. It provides a clear breakdown of your tax and NI liability for the selected tax year.
What Is Income Tax?
Income Tax is a tax on your earnings. In the UK, most employees have Income Tax deducted automatically through the PAYE (Pay As You Earn) system. The amount you pay depends on your income, your Personal Allowance, and the tax bands that apply to you.
What Is National Insurance?
National Insurance is a separate contribution that helps fund the UK's state benefits system, including the State Pension, NHS and unemployment benefits. Employees pay Class 1 National Insurance on their earnings above a certain threshold.
How Income Tax Is Calculated
Your Income Tax is calculated as follows:
- Start with your gross income (salary, bonuses, commission).
- Subtract your Personal Allowance (£12,570 for 2026/27).
- Apply the appropriate tax bands to your taxable income.
- For England, Wales and NI: 20% basic rate, 40% higher rate, 45% additional rate.
- For Scotland: different bands apply (starter, basic, intermediate, higher, advanced, top).
How National Insurance Is Calculated
Employee National Insurance is calculated on your earnings above the Primary Threshold. For 2026/27:
- Earnings between £12,570 and £50,270: 8%
- Earnings above £50,270: 2%
- No NI on earnings below £12,570
What Is a Tax Code?
Your tax code tells your employer how much tax-free income you're entitled to. The standard code is 1257L, which means you have the full Personal Allowance of £12,570. If your circumstances change, your tax code may be adjusted.
What Is the Personal Allowance?
The Personal Allowance is the amount of income you can earn before you start paying Income Tax. For 2026/27, the standard Personal Allowance is £12,570. If your income exceeds £100,000, your Personal Allowance starts to taper.
How Does Salary Sacrifice Affect Tax and NI?
Salary sacrifice reduces your taxable pay and National Insurance contributions. By sacrificing part of your salary in exchange for a non-cash benefit, your Income Tax and NI liability can decrease. This calculator applies salary sacrifice to both Income Tax and NI calculations.
How Does Pension Affect Tax and NI?
Pension contributions are usually deducted from your gross pay. If your pension scheme operates under a net pay arrangement, contributions reduce your taxable income, which can lower your Income Tax. This calculator models pension contributions as deductions from gross pay.
UK Tax and NI Example
Illustrative example only
Gross salary: £50,000 • Monthly pay • 2026/27 • Tax code: 1257L • England • No pension • No student loan
Gross Pay (Annual)£50,000.00
Personal Allowance£12,570.00
Taxable Income£37,430.00
Income Tax£7,486.00
National Insurance£2,994.40
Total Tax & NI
£10,480.40
Estimated Take-Home Pay
£39,519.60
Monthly Take-Home Pay
£3,293.30
Effective Tax Rate
15.0%
Effective NI Rate
6.0%
What This Calculator Does Not Include
- Self-employed Income Tax or Class 4 National Insurance.
- Capital Gains Tax or dividend income.
- Marriage Allowance or other transferable tax allowances.
- Benefits-in-kind or company car tax.
- All possible HMRC tax-code adjustments.
- Employer National Insurance contributions.
Frequently Asked Questions
1. What is a UK Tax and NI calculator?
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A UK Tax and NI calculator estimates your Income Tax and National Insurance contributions based on your employment income, tax code and other factors. It provides a breakdown of your tax liability and net pay.
2. What is the difference between Income Tax and National Insurance?
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Income Tax is a tax on your income that goes to the government to fund public services. National Insurance is a separate contribution that funds the State Pension, NHS and other benefits. Both are deducted from your pay through PAYE.
3. How much Income Tax will I pay on £50,000?
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On a £50,000 salary in 2026/27 with a standard tax code (1257L) in England, you would pay approximately £7,486 in Income Tax and £2,994 in National Insurance, leaving you with approximately £39,520 take-home pay.
4. What is the Personal Allowance for 2026/27?
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The standard Personal Allowance for 2026/27 is £12,570. This is the amount of income you can earn before paying Income Tax. If your income exceeds £100,000, your Personal Allowance starts to taper.
5. What are the Income Tax bands for 2026/27?
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For England, Wales and Northern Ireland in 2026/27: Basic rate 20% (£12,571-£50,270), Higher rate 40% (£50,271-£125,140), Additional rate 45% (above £125,140). Scottish rates are different.
6. What is the National Insurance rate for 2026/27?
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For 2026/27, employee National Insurance is 8% on earnings between £12,570 and £50,270, and 2% on earnings above £50,270. There is no NI on earnings below £12,570.
7. How does a pension contribution affect my tax?
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Pension contributions can reduce your Income Tax liability because they are deducted from your gross pay (under net pay arrangements) or receive tax relief. This lowers your taxable income, meaning you pay less Income Tax.
8. Does salary sacrifice reduce National Insurance?
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Yes, salary sacrifice can reduce your National Insurance contributions because it lowers your earnings that are subject to NI. The reduction applies to both employee and employer NI in most cases.
9. What is the difference between Scottish and English tax rates?
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Scotland has different Income Tax bands compared to the rest of the UK. Scottish taxpayers pay starter (19%), basic (20%), intermediate (21%), higher (42%), advanced (45%) and top (48%) rates. English taxpayers pay basic (20%), higher (40%) and additional (45%) rates.
10. Why is my payslip different from this calculator?
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This calculator provides estimates based on the information you provide. Your actual payslip may differ due to your specific tax code, employer payroll adjustments, benefits-in-kind, pension scheme rules, or other deductions not included in this calculator. Always refer to your official payslip for exact figures.
⚠️ Important: This calculator provides estimates only and is not tax advice. It is not an official HMRC calculator. Actual payslips can differ. Tax codes can contain adjustments. Employer payroll systems may calculate deductions differently. Scottish Income Tax differs from the rest of the UK. Pension and salary-sacrifice arrangements can affect calculations. Student loan deductions depend on the applicable plan. Complex situations should be reviewed with an appropriately qualified professional.
Related Calculators
For a broader range of tax calculations, you may also find SmartTaxCalculator.com a useful resource for exploring different tax scenarios.