Invest Ksh 100,000 at Guardian Bank for 20 years.
At Guardian Bank's current weighted-average deposit rate of 8.17%, a Ksh 100,000 deposit grows to about Ksh 509,603 after 20 years — about Ksh 409,603 in interest, assuming monthly compounding and no withdrawals.
Final balance
Ksh 509,603
5.10× your deposit
Deposited
Ksh 100,000
One-off, no withdrawals
Interest earned
Ksh 409,603
At 8.17% p.a.
Year by year
Contributions form the floor; interest compounds on top.
Could you earn more elsewhere?
The same Ksh 100,000 in Cytonn Money Market Fund — currently Kenya's top-yielding MMF at 9.39% net of 15% WHT — would grow to about Ksh 649,278 over the same 20 years. Run your own numbers on the compound interest calculator.