UK Money & Finance Calculators
Saving, investing, tax and debt calculators for UK households — clear, accurate and free to use.
Compound Interest
See how your savings grow with compound interest. Add a lump sum and monthly contributions, choose the rate and term, and view total interest earned.
Money & FinanceISA
Project tax-free growth in a Stocks & Shares or Cash ISA. Stay within the 20,000 annual allowance and see how much your ISA could be worth over time.
Money & FinanceIndex Fund Growth
Project long-term index fund growth with monthly investing. Factor in the platform/fund fee to see the real after-cost value of your portfolio.
Money & FinanceLoan Repayment
Calculate monthly repayments on a personal or car loan from the amount, APR and term. See the total interest and total cost over the life of the loan.
Money & FinanceSavings Goal
Find out how much to save each month to hit a target by a set date, allowing for interest on your savings and any amount you have already put aside.
Money & FinancePension
Estimate your pension pot at retirement from current savings and monthly contributions, including employer contributions and expected investment growth.
Money & FinanceSalary / Take-Home Pay
Work out your 2026/27 take-home pay after Income Tax, National Insurance, pension and student loan. England, Wales & NI bands, verified against gov.uk.
Money & FinanceCredit Card Payoff
See how long it takes to clear a UK credit card and the total interest, based on your balance, APR and monthly payment. Shows the cost of paying only the minimum.
Money & FinanceInflation
See how inflation erodes the value of money over time. Find what a sum will be worth in today's money, and what today's costs might be in future.
Money & FinanceEmergency Fund / FIRE
Work out the emergency fund you need from your monthly expenses, plus your FIRE number using the 4% rule. Two essentials for UK financial independence planning.
ExpertInvestment Comparison
Compare buy-to-let against a Stocks & Shares ISA, index fund, cash ISA, savings and bonds over your amount and timeframe - with UK tax built in (Section 24, CGT, dividend tax).