Home Loan Affordability Rules in South Africa
South African banks apply five affordability rules before approving a home loan: an instalment capped at roughly 30% of gross income, a full debt and expense check, a clean credit record, verified income documents, and — for most buyers — a deposit. bond.co.za explains each rule below and what it means for how much you can borrow.
By bond.co.za Editorial Team, Home loan content editor · Reviewed by Registered Mortgage Originator · Published 2026-09-28 · Last verified 2026-09-28
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How is home loan affordability calculated?
Every South African bank runs the same five checks, in some order, before it decides how much to lend.
Home loan affordability in South Africa is calculated by checking five things: your income against an instalment cap, your disposable income after debt and expenses, your credit record, your proof of income, and your deposit or loan-to-value position. All five exist because the National Credit Act requires every credit provider to individually assess whether a specific consumer can afford a specific loan before granting it — a bank cannot simply lend against income alone.
| Rule | What it checks | Why it matters |
|---|---|---|
| The instalment cap | Your bond instalment is capped at roughly 30% of your gross monthly income. | This is the starting ceiling every South African bank applies before it looks at anything else. |
| The disposable-income check | Existing debt orders and living expenses are subtracted from your income first — if what is left over is less than the instalment cap, the lower figure wins. | Two applicants on the same salary can qualify for very different loan amounts once their debt is factored in. |
| The credit record check | No unpaid defaults or judgments, and a credit score that meets the bank’s internal threshold. | A clean record is checked regardless of income, as part of the affordability assessment every credit provider must run under the National Credit Act. |
| The income verification rule | Recent payslips and bank statements for salaried applicants; 6–12 months of business bank statements and financials for self-employed applicants. | Banks assess proven income, not stated income — the documents you provide decide whether the first three rules are actually met. |
| The deposit / loan-to-value rule | A deposit is not always required — 100% bonds exist for qualifying buyers — but a bigger deposit lowers the loan amount needed and can improve the rate offered. | This rule does not raise your instalment cap; it changes how much of the purchase price still has to pass it. |
Documents for the income verification rule are listed in full in the home loan documents guide, and the credit record rule is covered in the credit score guide.
The instalment cap
Your bond instalment is capped at roughly 30% of your gross monthly income.
The disposable-income check
Existing debt orders and living expenses are subtracted from your income first — if what is left over is less than the instalment cap, the lower figure wins.
The credit record check
No unpaid defaults or judgments, and a credit score that meets the bank’s internal threshold.
The income verification rule
Recent payslips and bank statements for salaried applicants; 6–12 months of business bank statements and financials for self-employed applicants.
The deposit / loan-to-value rule
A deposit is not always required — 100% bonds exist for qualifying buyers — but a bigger deposit lowers the loan amount needed and can improve the rate offered.
How much must I earn to qualify for a R2 million home loan?
Applying the instalment-cap rule on its own, assuming no deposit and no existing debt.
Financing the full R2,000,000 with no deposit, over a 20-year term at the prime rate of 10.75% (South African Reserve Bank (SARB), last updated 2026-09-23), the estimated monthly instalment works out to R 20 305. Applying the 30% instalment-cap rule in reverse, a gross monthly income of roughly R 67 682 would be needed to meet that rule alone.
A deposit reduces the loan amount and therefore the income this rule requires; existing debt reduces the instalment you can actually afford, which raises it. See the how much home loan can I get guide for income tiers across other loan sizes.
How much home loan can I get on a R60,000 salary?
Applying the instalment-cap rule forward, from income to loan amount.
| Gross monthly salary | Max instalment (30%) | Estimated home loan |
|---|---|---|
| R 60 000 | R 18 000 | R 1 772 999 |
Assumes no existing debt, the prime rate of 10.75% (South African Reserve Bank (SARB), last updated 2026-09-23) and a 20-year term. Existing debt, a different term or the rate a specific bank offers will change this figure — it is an illustration of the instalment-cap rule, not a quote.
What is the monthly payment on a R100,000 home loan?
A per-R100,000 figure you can scale to any loan size.
At the prime rate of 10.75% (South African Reserve Bank (SARB), last updated 2026-09-23) over a 20-year term, a R100,000 home loan carries an estimated monthly instalment of R 1 015.
Because a fixed-rate, fixed-term bond repayment scales in a straight line with the loan amount, this per-R100,000 figure also works as a rough multiplier: a R900,000 bond costs approximately nine times as much a month, and a R1,500,000 bond approximately fifteen times as much, all else being equal. For an exact figure on your own loan size, use the home loan calculator.
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Straight answers about home loan affordability rules
How is home loan affordability calculated in South Africa?
South African banks calculate home loan affordability by applying five checks: an instalment cap of roughly 30% of your gross monthly income, a disposable-income check that subtracts your existing debt and living expenses, a credit record check for defaults and judgments, verification of your income through payslips or business financials, and a deposit or loan-to-value check. All five sit inside a single legal requirement: under the National Credit Act, every credit provider must individually assess whether a specific consumer can afford a specific loan before granting it — which is why the same income can produce different approved amounts at different banks.
How much must I earn to qualify for a R2 million home loan?
Assuming the full R2 000 000 is financed with no deposit and no existing debt, over a 20-year term at the prime rate of 10.75% (SARB, last updated 2026-09-23), the estimated monthly instalment is R 20 305. Applying the 30% instalment-cap rule, that means a gross monthly income of roughly R 67 682 would be needed to qualify on this rule alone. A deposit lowers the loan amount and therefore the required income; existing debt raises it.
How much home loan can I get on a R60,000 salary?
On a gross salary of R60,000 a month with no existing debt, the 30% instalment cap allows an estimated monthly instalment of R 18 000. At the prime rate of 10.75% (SARB, last updated 2026-09-23) over a 20-year term, that instalment could support an estimated home loan of roughly R 1 772 999. Existing debt, a shorter term or a different rate offer would change this figure.
What is the monthly payment on a R100,000 home loan?
At the current prime rate of 10.75% (SARB, last updated 2026-09-23) over a 20-year term, a R100,000 home loan carries an estimated monthly instalment of R 1 015. Because bond repayments scale in a straight line with the loan amount at a fixed rate and term, this figure also works as a quick per-R100,000 unit: a R900,000 bond costs roughly nine times as much a month, a R1,500,000 bond roughly fifteen times as much.
Do South African banks use a fixed debt-to-income ratio like other countries?
No. Some countries apply a single fixed debt-to-income ratio to every applicant. South African affordability rules work differently: the National Credit Act requires each credit provider to individually assess whether a specific consumer can afford a specific loan, using that applicant’s actual income, debt and expenses rather than one ratio applied uniformly. The 30% instalment-cap figure is an industry rule of thumb within that individual assessment, not a rate set in law.
Can self-employed applicants qualify under the same affordability rules?
Yes — self-employed applicants are assessed under the same five rules as salaried applicants, including the same instalment cap and disposable-income check. The difference is entirely in the income verification rule: instead of payslips, self-employed applicants typically provide 6–12 months of business bank statements and annual financial statements to prove the income the other rules are measured against.
Informational disclaimer
This guide is for information purposes only and does not constitute financial advice. It does not guarantee approval, a specific interest rate or a specific loan amount. Every bank runs its own affordability assessment under the National Credit Act, and your actual outcome depends on your full financial position and the property. Speak to a registered mortgage originator or your bank for an assessment based on your circumstances.
Last updated: 2026-09-28. Prime rate used for illustrations: 10.75% (South African Reserve Bank (SARB), last updated 2026-09-23). Instalment-cap rule of thumb: instalment not exceeding 30% of gross monthly income over a 20-year term, as at 2026-09-28.
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