Free financial calculator

Investment Growth Calculator

Project how a starting investment and regular monthly contributions could grow after fees and inflation.

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Adjust the assumptions

Investment Growth Calculator

Project how a starting investment and regular monthly contributions could grow after fees and inflation.

Figures are estimates. You can adjust every assumption.

Result

£0

View year-by-year breakdown +
YearContributionsGrowthBalance

Questions answered

What this calculator helps you work out

  • What could my investments be worth in 10, 20 or 30 years?
  • How much of the final value comes from deposits versus growth?
  • How could annual fees and inflation change the outcome?

Common questions

Investment Growth Calculator FAQs

How is investment growth calculated?+

Your starting balance grows at the assumed monthly equivalent of the annual return. Each contribution is then added and participates in future growth.

Does the result include inflation?+

Yes. The main projection is nominal, and the results also show an inflation-adjusted value in today’s money.

Are investment returns guaranteed?+

No. This is an illustrative projection, not a forecast or financial advice. Actual returns can be lower or negative.

Go beyond the result

How Much Should I Invest Each Month?

See a worked example, the trade-offs to consider and the assumptions that can change the answer.

Read the guide →