Monthly saving needed to hit a target by your deadline.
Monthly saving needed
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Current grows to
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Gap to close
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Total you contribute
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Your breakdown
Updates live as you type
Item
Amount
Worked example
Suppose your goal is KES 1,000,000 in five years, you already have KES 100,000 saved, and you expect a 10% annual return, compounded monthly. The KES 100,000 left untouched grows to about KES 164,531 over the 60 months, so the gap the new contributions must close is about KES 835,469. To fill that gap with a level monthly saving at 10% a year, you need to put away KES 10,789.01 a month.
Item
Value
Goal
KES 1,000,000
Current savings grown (60 mo at 10%)
KES 164,530.89
Gap to close
KES 835,469.11
Required monthly saving
KES 10,789.01
Total you contribute
KES 647,340.41
Growth earned on contributions
KES 188,128.70
You contribute KES 647,340 of your own money across the five years, and compounding adds the remaining KES 188,129 to reach the goal. The chart below splits the KES 1,000,000 target into your contributions and the growth.
How it is calculated
The tool first grows your existing savings forward to the goal date using monthly compounding, where the future value is the current balance times (1 plus the monthly rate) raised to the number of months. The monthly rate is the annual return divided by 12. Whatever that future value does not cover is the gap the regular contributions must fill. The required monthly saving comes from inverting the future-value-of-an-annuity formula: the payment equals the gap times the monthly rate, divided by (1 plus the monthly rate) raised to the number of months minus one. If the expected return is zero, the contribution is simply the gap split evenly across the months. The chart above counts your starting balance plus every contribution as money you put in, and the rest as growth. In Kenya, returns on money market funds or unit trusts are quoted before the 15% withholding tax on interest, so use a net return here if you want the contribution to be on the safe side.
Frequently asked questions
How much should I save each month to reach my goal?
It depends on the target, how long you have, what you have saved already, and the return you earn. This calculator grows your current savings at the expected rate, then works out the level monthly contribution that closes the remaining gap by your deadline. A higher expected return lowers the monthly amount, but money in a fixed deposit or money market fund carries less risk than higher-return options.
What return rate should I use for savings in Kenya?
Kenya money market funds have historically offered returns in the 9% to 13% range per year, while fixed-deposit accounts at banks vary by tenor and institution. Unit trusts and government securities such as Treasury bills can offer similar or higher gross rates. Because the 15% withholding tax on interest applies to most of these products, use the net after-tax return, which is roughly 85% of the quoted gross rate, to make your projection conservative.
What happens if my current savings already exceed the goal when grown?
If your existing savings, grown at the expected return over the time available, already meet or exceed the target, this calculator shows a required monthly saving of zero. You do not need to contribute anything further, and your current balance will reach the goal on its own at the chosen return. You can lower the expected return or shorten the time horizon to see the breakeven point.
How does compound interest help a savings goal in Kenya?
Compound interest means your returns earn further returns each period. On a 10% annual return compounded monthly, KES 100,000 grows to about KES 164,700 over 5 years without any additional contributions. Starting early amplifies this because each year of extra time multiplies the base, which is why the required monthly saving drops sharply when you extend your timeline by even one year.