UK financial calculators,
written by people who read the legislation.
Five focused tools covering stamp duty, mortgage repayments, income tax, pension contributions, and savings growth — each with the formulas, the official source, and the edge cases the other calculators miss.
The Tools
Five calculators · 2026/27 tax yearStamp Duty Calculator
SDLT for England & Northern Ireland, LBTT for Scotland, LTT for Wales. First-time buyer relief and additional-property surcharge included.
Mortgage Calculator
Monthly repayments, total interest, and amortisation for UK fixed, discount, and tracker mortgages. BoE base rate referenced.
Income Tax Calculator
Take-home pay for 2026/27 with England, Scotland (6-band), and Wales differences. NI, student loans, and pension relief included.
Pension Calculator
Tax relief at 20% / 40% / 45%, relief at source vs net pay, annual allowance warnings, and projected future value.
Savings Calculator
Compound growth with regular deposits. ISA tax-free comparison against PSA allowance for basic, higher, and additional rate payers.
"Every figure on this site traces back to a line of HMRC or gov.uk legislation. If a band changes, we update within the week."
— The Editor · Read the full methodology