Tools · Savings
Compound Interest Calculator
See how savings grow with compound interest — add regular deposits, pick any compounding frequency, and watch the balance build year by year. Free, and nothing is stored.
Deposits are added at the end of each compounding period. Leave the deposit at zero for a one-off lump sum.
- Future value
- KES 2,707,041
- Total deposited
- KES 1,000,000
- Interest earned
- KES 1,707,041
| Year | Deposits | Interest | Balance |
|---|---|---|---|
| 1 | KES 0 | KES 104,713 | KES 1,104,713 |
| 2 | KES 0 | KES 115,678 | KES 1,220,391 |
| 3 | KES 0 | KES 127,791 | KES 1,348,182 |
| 4 | KES 0 | KES 141,172 | KES 1,489,354 |
| 5 | KES 0 | KES 155,955 | KES 1,645,309 |
| 6 | KES 0 | KES 172,285 | KES 1,817,594 |
| 7 | KES 0 | KES 190,326 | KES 2,007,920 |
| 8 | KES 0 | KES 210,255 | KES 2,218,176 |
| 9 | KES 0 | KES 232,272 | KES 2,450,448 |
| 10 | KES 0 | KES 256,594 | KES 2,707,041 |
01How compounding works
Each period, interest is added to your balance — and the next period's interest is then calculated on that larger balance. Over years, this “interest on interest” is what separates compound growth from a flat, simple-interest return.
Two levers matter most: time, because the effect accelerates the longer you leave it, and regular deposits, because every deposit starts compounding the moment it lands.
02Common questions
What is compound interest?
Compound interest is interest earned on both your original amount and the interest already added to it. Because each period's interest starts earning its own interest, the balance grows faster over time than it would with simple interest.
How does compounding frequency change the result?
The more often interest is compounded — monthly rather than annually, say — the sooner it starts earning interest itself, so the final balance is slightly higher for the same headline rate.
Can I include regular deposits?
Yes. Set a regular deposit and the calculator adds it at the end of each compounding period, then shows the year-by-year balance. Leave the deposit at zero to model a one-off lump sum.
Does a higher rate guarantee this return?
No — the calculator assumes the rate you enter holds for the whole term. Real returns on investments vary; only a fixed-rate deposit or bond gives you a rate that is actually locked in.
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