Invest Ksh 5,000,000 at Kingdom Bank for 15 years.
At Kingdom Bank's current weighted-average deposit rate of 10.22%, a Ksh 5,000,000 deposit grows to about Ksh 23,010,410 after 15 years — about Ksh 18,010,410 in interest, assuming monthly compounding and no withdrawals.
Final balance
Ksh 23,010,410
4.60× your deposit
Deposited
Ksh 5,000,000
One-off, no withdrawals
Interest earned
Ksh 18,010,410
At 10.22% p.a.
Year by year
Contributions form the floor; interest compounds on top.
Could you earn more elsewhere?
The same Ksh 5,000,000 in Cytonn Money Market Fund — currently Kenya's top-yielding MMF at 9.39% net of 15% WHT — would grow to about Ksh 20,337,282 over the same 15 years. Run your own numbers on the compound interest calculator.