What is a debt-to-income ratio?

Your debt-to-income ratio is the share of your gross monthly income that goes towards debt repayments. You add up all your monthly debt instalments and divide by your gross monthly income. A lower ratio means more breathing room and makes you a lower risk to lenders.

What is a good DTI ratio in South Africa?

As a general guide, a DTI at or below 36% is considered healthy, 37% to 43% is manageable but tight, and above 43% is high. South African banks do not use a single fixed cut-off, but lower ratios improve your chances of approval and a better interest rate.

Do banks use DTI when I apply for credit?

Yes. Under the National Credit Act, lenders must assess affordability before granting credit. They look at your income, existing debt commitments and living expenses. Your DTI is a quick proxy for that assessment, though banks also factor in your credit record and declared expenses.

Debt-to-Income Ratio Calculator South Africa — DTI & Affordability

What Your DTI Ratio Tells You

Your debt-to-income ratio is one of the clearest single numbers for judging financial health. It answers a simple question: of every rand you earn before tax, how much is already promised to debt? Lenders lean on it because it is a fast, honest signal of whether you can absorb another repayment. The lower your ratio, the more margin you have for emergencies, savings and the inevitable interest-rate increases — and the more comfortably a bank can say yes to new credit.

The Bands Lenders Think In

There is no single legislated cut-off in South Africa, but the widely used guideline is straightforward. A ratio at or below 36% is considered healthy — you have comfortable room. Between 37% and 43% is manageable but tight, with little buffer if rates rise or an emergency hits. Above 43% is high: a large share of your income is committed before you have bought groceries, and new credit becomes hard to obtain. These are guidelines, not guarantees — a bank's own affordability assessment also weighs your declared living expenses and credit record.

How to Improve It

There are only two levers: reduce the debt side or grow the income side. Of the two, attacking debt is usually faster and fully within your control. Clearing small balances frees up their instalments immediately, which is where a structured payoff plan helps — our debt snowball calculator shows the fastest route. Tightening spending with a simple 50/30/20 budget frees up the extra payment that makes it happen. Avoid the common trap of consolidating debt only to run the cleared cards back up — that pushes your ratio straight back where it started.

Disclaimer: Finance Atlas is not a registered Financial Services Provider (FSP). This calculator provides estimates for educational purposes only and does not constitute financial advice. Lenders apply their own affordability assessments under the National Credit Act, which may differ from this ratio.