Savings & ISAs calculators
Project how your savings grow, see how much of your interest is tax-free, and compare tax-free ISA wrappers against ordinary savings accounts — including the 25% Lifetime ISA bonus, Junior ISAs for children, and the effect of inflation on your money's real value.
Compound interest
See how a starting amount plus regular monthly contributions grows over time — with a year-by-year breakdown of contributions vs interest earned.
Open calculatorSavings & ISAsSavings goal
Work out how much you need to save each month to reach a target amount — from a starting balance, an interest rate, and a timeframe.
Open calculatorSavings & ISAsSavings tax
See how much of your savings interest is tax-free under the Personal Savings Allowance — and how much is taxed at your marginal rate.
Open calculatorSavings & ISAsInflation impact
See how inflation erodes the buying power of a sum of money over time — and how much more you'd need in the future to match what it buys today.
Open calculatorSavings & ISAsCash ISA
See how a Cash ISA grows tax-free over time, how much of your £20,000 annual ISA allowance you're using, and roughly how much tax you're avoiding by keeping it in the wrapper.
Open calculatorSavings & ISAsLifetime ISA
See how a Lifetime ISA grows with the 25% government bonus on top of your own contributions — and what you'd lose withdrawing early for anything other than a first home or retirement.
Open calculatorSavings & ISAsJunior ISA
See how a Junior ISA grows tax-free until a child turns 18, and how much of the £9,000 annual Junior ISA allowance a given contribution uses.
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