Turning a target into a monthly saving
Start with a specific goal, the money already allocated to it and a realistic deadline. Use only savings available for this goal; an emergency fund earmarked for unexpected bills should not also be counted as a house deposit. The output estimates a regular contribution under the entered return assumption.
Worked example
For a £10,000 goal with £4,000 already saved and two years remaining, zero growth means saving £250 a month: (£10,000 − £4,000) ÷ 24. Interest can reduce the contribution required, but a variable rate can fall. Run the zero-growth case as a useful comparison.
Interpreting the result
The calculation projects your initial balance and regular payments over the selected period. Check that the saving amount fits your monthly budget. If not, compare a longer deadline, a smaller goal or an additional initial contribution rather than simply raising the assumed return.
Checks before relying on the numbers
For a fixed near-term deadline, consider access restrictions and the possibility of an investment loss. The tool does not account for changing goal prices, tax on interest, withdrawal penalties or interruptions to saving. Revisit the target when the expected cost changes.
Read the saving or investing guide →
Personal Fortune · Updated 25 September 2026. Educational illustrations, not personal financial advice. Our approach and corrections.