Required monthly saving
£578
Set a target amount and timeframe, then estimate the monthly amount you need to save to reach your goal.
Required monthly saving
£578
Target amount
£100,000
Total monthly deposits
£69,330
Projected investment growth
£30,670
Projected balance by year.
Start (Y1)
£7,202
End (Y10)
£100,583
Total interest
£31,253
Total contributed
£69,330
See how contributions and interest build over time.
Year 1
£7,202
Contributed (year)
£6,933
Total contributions
£6,933
Total interest
£269
Year 2
£14,924
Contributed (year)
£6,933
Total contributions
£13,866
Total interest
£1,058
Year 3
£23,204
Contributed (year)
£6,933
Total contributions
£20,799
Total interest
£2,405
Year 4
£32,083
Contributed (year)
£6,933
Total contributions
£27,732
Total interest
£4,351
Year 5
£41,604
Contributed (year)
£6,933
Total contributions
£34,665
Total interest
£6,939
Year 6
£51,813
Contributed (year)
£6,933
Total contributions
£41,598
Total interest
£10,215
Year 7
£62,761
Contributed (year)
£6,933
Total contributions
£48,531
Total interest
£14,229
Year 8
£74,499
Contributed (year)
£6,933
Total contributions
£55,464
Total interest
£19,035
Year 9
£87,086
Contributed (year)
£6,933
Total contributions
£62,397
Total interest
£24,689
Year 10
£100,583
Contributed (year)
£6,933
Total contributions
£69,330
Total interest
£31,253
Investment markets do not move in a straight line. Some years are strong, some are weak, and short-term declines are part of long-term investing. That is why this calculator is best used for planning ranges, not promises.
The default 7% rate is a real-return style assumption that many long-term planners use. A common framing is roughly 10% nominal growth over long periods in broad US equities, minus about 3% inflation, leaving around 7% in today's purchasing-power terms. In other words, your goal and monthly figure are interpreted in today's money.