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Loan Repayment Calculator (Kenya, 2026)
KES 100,000 at 15% p.a. over 24 months = KES 4,849/month, KES 116,376 total, KES 16,376 total interest. Below: the amortisation math, a first-12-months preview for the worked example, and an interactive widget for any principal, rate, and term.
Worked example: KES 100,000 at 15% over 24 months
| Principal | KES 100,000 |
| Annual rate (reducing balance) | 15% |
| Term | 24 months |
| Monthly payment | KES 4,849 |
| Total paid over the term | KES 116,368 |
| Total interest | KES 16,368 |
The formula: monthly = P × r × (1+r)^n / ((1+r)^n − 1), where P = principal, r = monthly rate, n = number of months. Kenyan lenders publish this as "reducing balance".
Amortisation preview: first 12 months of the example
| Month | Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| Month 1 | KES 4,849 | KES 1,250 | KES 3,599 | KES 96,401 |
| Month 2 | KES 4,849 | KES 1,205 | KES 3,644 | KES 92,758 |
| Month 3 | KES 4,849 | KES 1,159 | KES 3,689 | KES 89,068 |
| Month 4 | KES 4,849 | KES 1,113 | KES 3,735 | KES 85,333 |
| Month 5 | KES 4,849 | KES 1,067 | KES 3,782 | KES 81,551 |
| Month 6 | KES 4,849 | KES 1,019 | KES 3,829 | KES 77,722 |
| Month 7 | KES 4,849 | KES 972 | KES 3,877 | KES 73,845 |
| Month 8 | KES 4,849 | KES 923 | KES 3,926 | KES 69,919 |
| Month 9 | KES 4,849 | KES 874 | KES 3,975 | KES 65,944 |
| Month 10 | KES 4,849 | KES 824 | KES 4,024 | KES 61,920 |
| Month 11 | KES 4,849 | KES 774 | KES 4,075 | KES 57,845 |
| Month 12 | KES 4,849 | KES 723 | KES 4,126 | KES 53,720 |
Month 1 is mostly interest (KES 1,250 of KES 4,849); by month 12 principal repayment overtakes interest. The remaining 12 months follow the same reducing curve. Prepay early to skip disproportionate interest.
Typical Kenyan loan rates in 2026
Loan repayment is dominated by two levers: the annual interest rate and the term. Longer terms lower the monthly payment but increase total interest, sometimes dramatically. A KES 1,000,000 loan at 15% over 5 years costs KES 428,000 in total interest; the same loan over 10 years costs KES 936,000 in interest. Double the term, more than double the interest.
Rates for Kenyan borrowers in 2026: bank personal loans 14 to 18% p.a., mortgages 13 to 16%, SACCO loans 12 to 14% on reducing balance, asset finance 14 to 18%. Mobile lender apps price by flat fee, not APR, so are not directly comparable here.
The calculator shows pure interest cost. Real loans add arrangement fees (1 to 2.5% of the loan), legal fees for mortgages (roughly 1% plus stamp duty), and credit-life insurance (small but recurring). Add those to the total before you decide.
Try your own numbers
Enter any principal, annual rate, and term in months. The calculator returns the monthly payment, total paid, and total interest.
KES
%
months
Result
Monthly payment
KES 17,089
Total paid
KES 615,197
Total interest
KES 115,197
Visual breakdown
KES 615,197
Total paid
- Principal (yours)81.3%KES 500,000
- Interest (lender keeps)18.7%KES 115,197
See how much of every loan goes to interest. Shorter term = smaller red slice.
How does a loan repayment calculator work?
It uses the standard amortisation formula: monthly payment = P × r × (1+r)^n / ((1+r)^n − 1), where P is the principal, r is the monthly rate (annual/12), and n is the number of months. Each payment mixes interest (on the remaining balance) and principal.
What does a KES 100,000 loan at 15% over 24 months cost?
Monthly payment KES 4,849. Total paid KES 116,376. Total interest KES 16,376 over the two-year term.
What rate should I use for Kenyan loans?
Bank personal loans in Kenya sit around 14 to 18% APR in 2026. Mortgages 13 to 16%. SACCO loans 12 to 14% on reducing balance. Mobile lender apps are not directly comparable; see the specific calculators.
Does the calculator include arrangement fees?
No. It shows the pure interest cost of the loan. Add the one-off arrangement fee, legal fees, and any insurance to the total cost picture before signing.
What if my rate changes during the loan?
This calculator assumes a fixed rate. Variable-rate loans (most Kenyan mortgages link to Central Bank Rate plus a margin) reprice when CBR moves. Use the current rate as a baseline and re-run each time.
Is the reducing-balance method the same as amortisation?
Yes. Kenyan lenders use "reducing balance" to describe the standard amortisation method, where interest accrues on the outstanding principal (which reduces with each payment). This calculator uses the same maths.
Related
Verified 30 August 2026. Method: standard reducing-balance amortisation (identical to the formula used by Kenyan banks and SACCOs). No third-party rate feed required.