Savings & debt calculators
Compound interest, savings goals, ISAs and paying debt down faster.
4 calculators · cited to gov.uk · 2026/27
Compound interest calculator Watch savings grow year by year, with the split between what you paid in and what the interest added. Savings goal calculator How long a target will take, or what you need to put away each month to hit it by a date. Loan repayment calculator Monthly payment, total interest and how much an overpayment saves on a personal loan. Credit card payoff calculator How long a balance takes to clear at your APR and payment, and what paying more saves.
Guides for savings & debt
Clear explanations of the rules behind these calculators, checked against gov.uk for 2026/27.