How is a personal loan repayment calculated in Kenya?

Most Kenyan personal loans use the reducing-balance method, where interest is charged each month on the outstanding balance. The fixed monthly instalment is found with the standard amortisation formula so the loan is fully repaid by the end of the term.

What interest rates apply to personal loans in Kenya?

Bank personal loans typically run around 12–18% a year on a reducing balance. Digital and mobile lenders and microfinance often charge 18–36% or more once fees are annualised, so always compare the effective annual rate, not the headline monthly figure.

What is the difference between reducing balance and flat rate?

On reducing balance, interest is charged only on the amount still owed, so it falls as you repay. On a flat rate, interest is charged on the full original amount for the whole term, which makes the true cost much higher than the quoted rate. This calculator uses reducing balance.

Does this include loan fees and insurance?

No. The calculation covers principal and interest only. Kenyan lenders often add a one-off arrangement or processing fee, credit-life insurance and excise duty on fees, so the real cost can be a little higher than shown.

Does this calculator store my data?

No. All figures are computed locally in your browser and nothing is uploaded, so your loan details stay private.

Kenya Personal Loan Calculator

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This Kenya personal loan calculator shows your monthly repayment and the total cost of borrowing, using the reducing-balance method that Kenyan banks apply.

How it works

The fixed monthly instalment comes from the standard amortisation formula:

M = P × r × (1 + r)^n / ((1 + r)^n − 1)

where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the number of monthly payments. Each month interest is charged on the remaining balance only, so as you repay, more of each instalment goes to principal.

Total interest is (M × n) − P, and total repaid is M × n.

Example

Borrowing KES 500,000 at 14% over 3 years (36 months) gives a monthly instalment of about KES 17,090, with roughly KES 115,000 of total interest and around KES 615,000 repaid in all. A higher digital-credit rate of 30% would push both the instalment and total cost up sharply.

Notes

Always compare the effective annual rate, not a monthly headline — digital loans look small monthly but annualise high.
Reducing balance is far cheaper than a flat rate for the same quoted percentage.
Lenders usually add a processing fee, credit-life insurance and excise duty, so budget a little above this estimate.