UK Calculators
25 free calculators for UK pay, tax, property and everyday finances — with clear workings and sources.
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Popular calculators
Income Tax Calculator
Estimate income tax by band, including the personal allowance taper on higher incomes.
Mortgage Repayment Calculator
Monthly payments and total interest for a repayment or interest-only mortgage.
National Insurance Calculator 2026/27
Estimate employee Class 1, employer National Insurance and self-employed Class 4 contributions.
Payroll Calculator
Estimate payslip deductions, net pay, employer National Insurance, pension and total employment cost.
Percentage Calculator
Percentage of a number, percentage change and one number as a percentage of another.
Self-Employed Tax Calculator
Estimate Income Tax, Class 4 NI, take-home profit and a monthly tax set-aside on trading profit.
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Money & Tax
8 calculators
Income tax, take-home pay, National Insurance, dividends, gains and pension relief.
Property
4 calculators
Mortgage repayments, affordability, Stamp Duty and buy-to-let rental yield.
Business
3 calculators
Corporation tax, VAT positions and the numbers behind running a UK company.
Savings & Investments
3 calculators
Interest, compounding and what regular contributions grow into over time.
Loans & Credit
3 calculators
Loan repayments, total interest and how long credit card balances take to clear.
Everyday
4 calculators
Percentages, ages, fuel costs and metric or UK imperial unit conversions.
Built for clarity
Clear workings. Informed decisions.
Understand what goes into an estimate with clear explanations, worked examples and visible assumptions. Relevant sources and review dates help you check the figures before making a decision.
- Visible workings and assumptions
- Official sources where relevant
- Tax year and review dates
- No login needed
Recently reviewed
- Income Tax Calculator
- Mortgage Repayment Calculator
- National Insurance Calculator 2026/27
- Payroll Calculator
- Percentage Calculator