Tool
Compound interest
What a sum grows to at a rate over the years, and how much of that is interest on interest.
a month
%
As an AER - the yearly rate after monthly interest, as UK savings accounts quote it.
years
With interest
£23,581
Just saved, no interest
£17,000
Interest earned you
+£6,581(+38.7% more)
Growth over time
With interest from £5,000 on 1 Jan 2026 to £23,581 on 1 Jan 2036, up £18,581.
1 Jan 2026 · £5,000+£18,5811 Jan 2036 · £23,581
With interest No interest
An illustration from the figures above, not a forecast. Facts, not financial advice.
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