Free financial calculators for the United Kingdom. Mortgage, tax, investment, and retirement calculators with UK-specific rates and rules.
This page collects free calculators built around the UK financial system — mortgages, ISAs, Stamp Duty, pensions, and loans. Every calculator uses pounds sterling, British English, and UK-specific terminology, so you can plan with figures that actually reflect how things work here.
The UK tax year runs from 6 April to 5 April the following year, and HMRC administers income tax, National Insurance, and Stamp Duty Land Tax. Long-term savings are commonly held in ISAs (Individual Savings Accounts) or a Lifetime ISA, alongside the State Pension. The Bank of England sets the base rate that influences mortgage and savings rates across the country (example rates used in our calculators are for illustration only — actual rates vary by lender and change frequently).
The Mortgage Calculator estimates your monthly repayments, while the Stamp Duty Calculator works out the Stamp Duty Land Tax due on a property purchase. The Income Tax Calculator and Take-Home Pay Calculator show how much tax and National Insurance comes off your salary, and the ISA Calculator helps you project tax-free savings growth.
Yes. Every calculator on this site is completely free, with no signup, account, or hidden charges required.
Yes, the income tax and take-home pay calculators are based on the UK tax year, which runs from 6 April to 5 April the following year.
No — all rates shown in examples are illustrative only and do not reflect current market rates. Mortgage, loan, and savings rates change frequently and vary by lender, so always enter your own quoted rate.
Yes, every calculator works on mobile, tablet, and desktop browsers with no app download needed.
Disclaimer: The information provided on this page is for educational purposes only. Always consult a qualified financial advisor or tax professional before making financial decisions.