Investment Growth Calculator UK
Investments don't grow in a straight line, so this shows three scenarios side by side: cautious, middle and strong growth.
Estimates for information only, using 2026/27 rates for England, Wales and Northern Ireland unless stated. Not financial or tax advice; check your own situation with HMRC or a qualified adviser.
How it works
Each scenario compounds your starting amount and monthly contributions at a different yearly return, after fees.
Turn on inflation adjustment to see the results in today's money.
Past returns are no guide to the future. Investments can fall as well as rise.
Frequently asked questions
What return should I assume?+
Long-run global stock returns have averaged roughly 5β7% a year after inflation, but with big swings. Cautious planners use lower figures.
How much do fees matter?+
A lot over time: 1% a year in fees can reduce a 30-year pot by around a quarter.