Savings Calculators
Savings & Investment Calculators
Free UK savings calculators — ISA growth, compound interest, premium bonds and investment projections.
Grow your wealth with confidence. Our savings calculators show how your money grows with compound interest, compare ISA types, and help you plan for every financial goal.
Savings Calculator
Calculate how your savings grow with compound interest. Model regular contributions and different interest rates.
Open calculator →Regular Savings Calculator
Calculate how regular monthly savings grow over time with compound interest.
Open calculator →ISA Growth Calculator
Calculate how your ISA savings grow tax-free. Updated for the 2026/27 ISA allowance of £20,000 per year.
Open calculator →ISA Switch Calculator
Calculate whether switching your ISA to a higher rate or better investment platform would leave you better off.
Open calculator →Compound Interest Calculator
Calculate the effect of compound interest on any sum. See the dramatic difference compounding makes versus simple interest.
Open calculator →Premium Bonds Calculator
Estimate your Premium Bond prize chances and expected annual return. Updated with the latest NS and I prize rate.
Open calculator →Emergency Fund Calculator
Calculate the right size for your emergency fund. Experts recommend 3 to 6 months of essential expenses.
Open calculator →Investment Calculator
Calculate how investments grow with regular contributions and compound returns. Model ISA, pension and other investments.
Open calculator →Safe Savings FSCS Checker
Check whether your savings are FSCS protected. The scheme covers up to £85,000 per person per UK authorised institution.
Open calculator →Fixed-Rate Savings Calculator
Calculate returns on fixed-rate savings bonds. Compare total interest earned against easy-access account rates.
Open calculator →Savings Interest Calculator
Calculate daily, monthly and annual interest on any savings balance. Understand the difference between AER and gross rates.
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