Free UK money calculators

Know what it really costs, before you decide

Loans, credit cards, savings and ISAs, pensions, tax codes, EV charging and household running costs: clear answers for UK households, with the working shown and no sign-up.

471 calculators and guides2026/27 UK tax year figuresFree no sign-up

Most used calculators

💷Loan repayment calculator£500 to £50,000 💳Credit card repayment calculatorTime and interest 🏦Savings calculatorsGrowth, goals and monthly saving 🧮Pension tax relief calculatorGross, relief and real cost 🔎Tax code checkerType a code, see what it means 🧮Electricity cost calculatorAny appliance, any price 🔌EV charging cost calculatorCost per charge and per mile 🎯Pension for £30,000 a yearAbout £436,310 at 4%

Browse by topic

💷Loan RepaymentsMonthly cost of personal loans122 pages ⏱️Short-Term LoansSmall loans over 3 to 12 months40 pages 💳Credit Card RepaymentsTime and interest to clear a card34 pages 🏦Savings and ISAsSavings growth, interest and ISA rules147 pages 🧓PensionsTax relief, pot size and how much you need31 pages 🧾Tax CodesWhat 1257L, BR, 0T and K codes mean25 pages ⚡Energy and Running CostsAppliances, EV charging and heat pumps65 pages

How these calculators work

Each calculator uses a standard formula and shows its assumptions next to the result. Loan payments are equal monthly instalments. Savings growth compounds monthly with money added at the end of each month. Running costs multiply watts by hours by your price per kWh.

The tables on each page are produced by the same code as the tool, so you can compare the page with the calculator and see the same numbers.

Estimates, not advice

These are planning tools, not financial advice. Rates, fees and rules change and your own situation will differ. Use the results to ask better questions, then check the details with your lender, provider or a regulated adviser.