Invest Ksh 500,000 at Standard Chartered Bank Kenya for 20 years.
At Standard Chartered Bank Kenya's current weighted-average deposit rate of 3.14%, a Ksh 500,000 deposit grows to about Ksh 936,161 after 20 years — about Ksh 436,161 in interest, assuming monthly compounding and no withdrawals.
Final balance
Ksh 936,161
1.87× your deposit
Deposited
Ksh 500,000
One-off, no withdrawals
Interest earned
Ksh 436,161
At 3.14% p.a.
Year by year
Contributions form the floor; interest compounds on top.
Could you earn more elsewhere?
The same Ksh 500,000 in Cytonn Money Market Fund — currently Kenya's top-yielding MMF at 9.39% net of 15% WHT — would grow to about Ksh 3,246,389 over the same 20 years. Run your own numbers on the compound interest calculator.