Savings Calculator
Work out what your savings could grow to with regular monthly contributions.
Final balance
£30,940.79
- Total contributions
- £25,000.00
- Interest earned
- £5,940.79
Assumes interest is compounded monthly and contributions are made at the end of each month.
v1.0 · Reviewed September 2026
How this is worked out
The balance grows each month at one twelfth of the annual rate, and the monthly contribution is added at the end of each month.
Worked example
- Starting balance £1,000
- £200 a month
- 4%
- 10 years
120 monthly steps of growth and contributions
£30,940.79, of which £25,000.00 is your own money
Assumptions and limits
- Assumes one unchanging rate for the whole period and monthly compounding. An account quoting an annual equivalent rate paid yearly will differ slightly.
- Contributions are added at the end of each month, so paying in at the start would earn a little more.
- Ignores tax on interest above your personal savings allowance, and ignores inflation, so the final figure is in today's pounds only in name.