Calculators

Compound Interest Calculator

Free compound interest calculator. See how savings grow with daily, monthly, quarterly or annual compounding and regular monthly contributions.

£
£
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Enter your values and press Calculate.

How to use the Compound Interest calculator

Compound interest means you earn interest on your interest. The longer money stays invested, the more dramatic the effect — which is why starting early matters more than starting big.

This calculator is for illustration only and does not account for taxes, fees or inflation.

Formula

A = P(1 + r/n)nt for the initial deposit, where P is principal, r the annual rate, n compounding periods per year and t years. Monthly contributions are added at the end of each month and compound at the equivalent monthly rate.

Frequently asked questions

What is APY?

Annual percentage yield is the real yearly return once compounding is included. A 5% rate compounded monthly gives an APY of about 5.116%.

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