Tool · Investing

Compound interest calculator

See how your money grows over time — and how much of your final pot comes from growth rather than contributions.

Your inputs

£
£
1%6%12%

Global index funds have historically returned ~6–9% after inflation adjustment. Use 5% for a conservative estimate.

1yr20yr40yr
%

Raise this to model directing pay rises into savings.

Final pot value
£0
Total contributed
£0
Your money in
Total growth
£0
% came from compounding
Portfolio growth over time
Growth
Contributions

Illustrative only. Returns are not guaranteed. Past performance of global markets does not guarantee future results. Does not account for inflation, taxes, or charges unless held in an ISA or pension wrapper.