Free tool

See what your investing habit could grow into.

Pop in what you're starting with, what you can add each month, and how long you'll leave it — this shows the maths behind compound growth, not a prediction of what will actually happen.

Your numbers

Changes the symbol shown only — the maths itself isn't converted between currencies.

£
£
years
%

Global equity index funds have historically returned roughly 5–8% a year after inflation — this is an assumption, not a guarantee.

Projected value after 15 years
£0
Based on the inputs to the left — a hypothetical outcome, not a forecast.
Starting
£0
Contributed
£0
Growth
£0

Balance over time

How your starting amount, contributions, and growth stack up year by year.

Starting amount Contributions Growth
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This calculator is a general educational tool, not personalised financial advice or a forecast of returns. It assumes a fixed annual return applied monthly, contributions made at the end of each month, and doesn't account for fees, tax, or inflation. Real investments fluctuate and can lose value — capital is at risk.

That's the theory — want to see how it applies to what you actually hold? Chat with your real portfolio →
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MrJesse121 provides general financial education and commentary for informational purposes only. Nothing on this site or in any review is personalised financial advice or a recommendation to buy, sell, or hold any investment. Capital is at risk and past performance isn't a guide to future results. If you need advice specific to your situation, speak to an FCA-authorised financial adviser.