Best UK Tax Calculators Online (2025)
Free UK tax calculators for income tax, National Insurance, self-employment, payroll, and VAT. HMRC-aligned rates for the 2024–25 tax year.
Guide Overview
Whether you are a PAYE employee checking your tax code, a self-employed sole trader estimating Class 2 and Class 4 National Insurance, or a small business running payroll, these free UK calculators give you instant clarity. All tools use 2024–25 HMRC rates and run in your browser with no signup.
Focus: free UK tax calculators for employees, freelancers, and small businesses
Income Tax and Personal Allowance
UK income tax is calculated on taxable income after subtracting your personal allowance, currently £12,570. Our UK income tax calculator applies the correct marginal rates: 20 percent basic rate up to £50,270, 40 percent higher rate up to £125,140, and 45 percent additional rate above that. It also handles the personal allowance taper for incomes above £100,000. Enter your gross salary or self-employment profits and see your total tax liability in seconds.
Self-Employment National Insurance
Self-employed workers in the UK pay two classes of National Insurance: Class 2 at £3.45 per week if profits exceed £6,725, and Class 4 at 6 percent on profits between £12,570 and £50,270 plus 2 percent above that. Our self-employment calculator breaks down both classes and shows your effective NI rate. Pair it with the income tax calculator to see your combined tax bill before filing your Self Assessment.
Employer Payroll and Auto-Enrolment
Running UK payroll requires calculating employer NI contributions, employee PAYE withholding, and workplace pension auto-enrolment. Our UK payroll calculator handles all three, showing the total employer cost alongside the employee take-home pay. It covers the NI secondary threshold, pension minimum contributions, and the employment allowance where applicable.
VAT for UK Businesses
If your taxable turnover exceeds the VAT registration threshold of £90,000, you must charge VAT on your sales. The VAT calculator handles standard rate (20 percent), reduced rate (5 percent), and zero-rated calculations. Use it to convert between VAT-inclusive and VAT-exclusive prices for invoicing and bookkeeping.
Tools in This Guide
Use these tools in sequence based on your workflow needs.
UK Income Tax Calculator
Calculate UK income tax and National Insurance contributions using 2025/26 PAYE bands for England, Scotland, and Wales.
Use tool →UK Self-Employment Tax Calculator
Calculate UK National Insurance contributions (Class 2 and Class 4) for self-employed workers based on net profits.
Use tool →UK Payroll Calculator
Estimate UK take-home pay by pay frequency using PAYE tax and National Insurance assumptions.
Use tool →VAT Calculator
Calculate VAT (Value Added Tax) for any country. Add or remove VAT from any amount with country-specific rates.
Use tool →Frequently Asked Questions
Are these UK tax calculators free?
What tax year do the UK calculators use?
Can I use these calculators for my Self Assessment?
Do the UK payroll calculators include pension auto-enrolment?
Last updated: June 1, 2025