How Much Loan Can You Afford in Kenya? A Practical Guide to Borrowing Within Your Means

Lenders calculate affordability based on rules that protect them from default. Those rules do not always protect you from a very difficult few years. This guide walks you through how to calculate the maximum loan you can realistically carry — using your net take-home pay, not the gross salary figure on your payslip.

Start With the Right Number: Net Salary, Not Gross

This is the most important point in the whole article, so let us get it right immediately.

When a bank says your loan repayment cannot exceed 40% of your salary, they mean 40% of your net take-home pay — what actually lands in your M-Pesa or bank account after PAYE, SHIF, NSSF, and the Housing Levy have been deducted. Not your gross salary. Not the figure your employer quotes when you were hired.

The difference matters more than most people realise. On a KES 80,000 gross salary, your deductions in 2026 typically look like this:

You earned KES 80,000 on paper. You received roughly KES 60,000. If you had used your gross salary to calculate affordability — as many people do — you would have overstated your capacity by nearly KES 20,000 per month. Over a 36-month loan, that is a KES 720,000 miscalculation.

The 40% Rule: What Banks Actually Use

Most Kenyan banks apply a debt-to-income (DTI) ratio of 40%. This means your total monthly loan repayments — from every lender combined — should not exceed 40% of your net monthly salary. Some lenders stretch this to 50%, but that is a level most financial advisors consider high-risk territory.

The 40% figure covers all active loans: your bank personal loan, your SACCO repayment, your mobile loan deduction, any logbook loan, your mortgage. Everything. It is not 40% available for a new loan — it is 40% for all debt service combined.

A Worked Example: KES 80,000 Gross Salary

Here is how the calculation works in practice.

• Gross salary: KES 80,000
• Net take-home (after all statutory deductions): KES 58,400
• 40% DTI ceiling (total loan repayments): KES 23,360/month
• Existing SACCO loan repayment: KES 8,000/month
• Available for a new loan: KES 15,360/month

With KES 15,360 per month available, how much can you actually borrow?

A longer term gives you a larger loan for the same monthly payment, but you pay more in total interest. A shorter term costs you more each month but less over the life of the loan. The calculator at the end of this article lets you run either scenario in seconds.

Quick Reference: Gross Salary → What You Can Borrow

The table below assumes no existing debt and a 40% DTI limit. These are ceiling figures — not targets.

Net take-home figures are estimates — your exact deductions depend on NHIF/SHIF opt-outs, pension contributions, and other employer-specific deductions. Use the PAYE calculator above to get your actual number.

Why 40% Is Already Tight

Hitting the 40% limit is not the same as being comfortable. Run the numbers on a typical Nairobi budget and you will see why.

Take the KES 80,000 gross example. Net take-home: KES 58,400. Now consider what basic monthly life costs:

• Rent: KES 15,000–25,000 (a decent 1-bedroom outside the CBD)
• Food: KES 8,000–12,000
• Transport: KES 4,000–6,000
• Electricity and water: KES 2,500–4,000
• Airtime and internet: KES 1,500–2,500

That is KES 31,000 to KES 49,500 in basic living costs — before school fees, medical expenses, clothes, or any savings. Add 40% of net (KES 23,360) for loan repayments, and you are at KES 54,360 to KES 72,860 in total outgoings on KES 58,400 income. The numbers barely work on the optimistic end and do not work at all on a realistic one.

This is not an argument against borrowing. It is an argument for borrowing less than the maximum the bank will approve.

A More Conservative Approach

Many personal finance practitioners recommend limiting loan repayments to 30% of net salary rather than 40%. The extra 10% gives you room to build savings, handle emergencies, and actually enjoy your income rather than routing it straight to lenders.

Two rules worth applying before you sign any loan agreement:

1. Build a 3-month emergency fund first. If your net salary is KES 58,400, you want KES 175,000 sitting somewhere safe before you add a monthly loan obligation. Without it, the first job loss, hospital bill, or car repair sends you back to borrow more — at worse terms.
2. Never borrow for a depreciating asset you do not need. A new TV, a holiday, a phone upgrade — these feel pressing in the moment and forgotten within months. The loan stays for years. If the item loses value the moment you buy it and your life would be fine without it, borrowing for it is a costly mistake.

How Lenders Size Different Types of Loans

Unsecured personal loans

Banks typically cap these at 3 to 6 times your net monthly salary. On a KES 58,400 net salary, that is a ceiling of KES 175,200 to KES 350,400 — and the repayment must still fit within the 40% DTI limit. If the maths does not work at 3×, the bank will not lend you 6×.

Car loans

Lenders generally finance up to 70–80% of the vehicle's value. You pay the balance as a deposit. But the monthly repayment still has to fit inside your DTI allowance. A car that costs KES 1.8 million, financed at 80% (KES 1.44 million) over 48 months at 16% p.a., generates a monthly repayment of roughly KES 40,000. If that exceeds 40% of your net salary, the bank says no — or offers you a smaller loan.

Mortgages

Mortgage lenders assess net salary, income stability (employment type, tenure), and all existing debt. The housing payment — principal, interest, insurance, and land rates — is typically capped at 40% of net monthly income. Some lenders will also consider a spouse's income to lift the ceiling. The key factor most people underestimate is that a mortgage runs 15 to 25 years. Your income will change, your expenses will change. Borrow conservatively.

Warning Signs You Are Already Over-Borrowed

These are not hypotheticals. If any of the following describe you right now, the answer to "can I afford another loan?" is probably no — and the real question is how to reduce what you already owe.

• You are taking a new loan to repay an existing one. This is the clearest sign that the debt has outgrown the income.
• You are skipping meals or cutting essential spending to meet loan repayments. A loan should fund your life, not cost you it.
• Your CRB status is at risk — you have missed payments, received notices, or are one month behind on any facility.
• You have no savings at all. Zero. Every shilling is committed before it arrives. This means one bad month — a missed payment, a car breakdown, a sick child — creates a crisis.
• You cannot name, off the top of your head, all your active loans and their repayment dates. If you have lost track of what you owe and to whom, the number of facilities has grown beyond what one salary can comfortably manage.

The Right Way to Calculate Before You Apply

Do this calculation in order, every time, before any loan application:

1. Find your net take-home pay. Not gross. Use a PAYE calculator if you are not sure — deductions change each tax year and the difference is significant.
2. List every active loan repayment. Bank loan, SACCO deduction, mobile loan, buy-now-pay-later arrangement, anything. Add them up.
3. Apply the 40% ceiling to your net salary. That is the maximum total debt service allowed. Subtract your existing repayments.
4. The result is the maximum monthly payment for a new loan. Put that number into a loan calculator and work backwards to find the loan amount you can support at the rate and term available.
5. Apply a personal ceiling of 30%, not 40%. Use 40% as a hard upper limit — a guardrail, not a target. Aim for 30% and give yourself breathing room.

Banks are in the business of lending money. Their job is to assess your risk to them — which is not exactly the same as your risk to yourself. You are the one who will be eating ugali every night for 36 months if the repayment is too high. Run the numbers yourself before you walk through the door.