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Compound Growth Explained

Compounding means growth can itself generate further growth, but an investment return is never guaranteed.

Last reviewed: 24 September 2026

Contributions matter

Regular contributions can be as important as the assumed growth rate, particularly early on.

Time changes the illustration

Because growth compounds, extending the period can materially change an illustration. That does not make the assumed rate certain.

Use scenarios, not predictions

Try several rates and contribution amounts. Treat each result as maths based on assumptions, not a forecast of what an investment will deliver.

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