How Much Can I Borrow in 2026? APRA's 3% Buffer and 6x DTI Limit Explained

How Much Can I Borrow in 2026? APRA's 3% Buffer and 6x DTI Limit Explained HEHomeLoanAI Editorial·2 July 2026 How much can you borrow in 2026? The APRA buffer and DTI cap in plain numbers In May 2026, APRA confirmed that its 3% serviceability buffer remains in place. Combined with a 6x debt-to-income (DTI) cap on new lending from February 2026, these two rules determine the upper limit of what any Australian bank can lend you — regardless of your credit score, deposit size, or employment stability. Here is the direct answer: when a bank assesses your mortgage application, it tests whether you can afford repayments at your loan's product rate plus 3 percentage points. If the product rate is 5.69%, the assessment rate is 8.69%. This roughly 3% gap between what you actually pay and what the bank tests against is what constrains your maximum loan size. Separately, from February 2026, banks must cap new lending where DTI exceeds 6x at 20% of their portfolio. The 3% buffer: how it caps your borrowing power The serviceability buffer works as follows. A lender takes your loan's advertised rate and adds 3.0 percentage points. It then calculates whether your net income can cover the repayments at that higher rate, plus a margin for living expenses (typically the Household Expenditure Measure, or HEM). Example: you apply for a variable loan at 5.69%. The bank tests your ability to repay at 8.69%. On a $500,000 principal-and-interest loan over 30 years, the difference is substantial: Actual monthly repayment at 5.69%: approximately $2,900 Assessment monthly repayment at 8.69%: approximately $3,920 The bank must be satisfied you can service $3,920 per month, not $2,900. That $1,020 monthly gap is the buffer at work. For every $100,000 of borrowing, the buffer adds roughly $200–210 per month to the assessed repayment. The practical effect: a single borrower with no dependants earning $100,000 per year (roughly $6,250 per month after tax and Medicare Levy) might qualify for approximately $450,000–$520,000 under the buffer, depending on living expenses, other debts, and the lender's specific model. Without the buffer, the same borrower might qualify for $650,000 or more.

The 6x DTI cap: a hard ceiling

Since February 2026, APRA requires banks to limit new residential mortgage lending where the debt-to-income ratio is 6 or above to no more than 20% of new lending in each portfolio. DTI is calculated as total debt divided by gross annual income. This is a portfolio-level restriction, not a per-borrower ban — but the practical consequence is that if your DTI exceeds 6, your application goes into a limited pool. Banks ration these slots, often reserving them for borrowers with very strong compensating factors: high deposits, low LVR, professional incomes, or existing customer relationships.

What 6x DTI means in practice:

Gross income $80,000: maximum total debt approximately $480,000 Gross income $100,000: maximum total debt approximately $600,000 Gross income $150,000: maximum total debt approximately $900,000 Gross income $200,000: maximum total debt approximately $1,200,000 Total debt includes the mortgage you are applying for plus any existing debts — car loans, personal loans, credit card limits, existing mortgages, and HELP/HECS debt (depending on the lender's treatment).

The interaction: two constraints, one ceiling

Your borrowing power is limited by whichever constraint bites harder. Consider these examples: A couple with a combined gross income of $160,000 and one car loan of $25,000: DTI cap allows total debt up to $960,000 (6 x $160,000). Subtracting the car loan leaves $935,000 for a mortgage. The 3% buffer at a 5.69% product rate and typical living expenses for a couple yields a borrowing capacity closer to $700,000–$780,000. Result: the buffer, not the DTI cap, is the binding constraint for this couple. Now consider a high-income single borrower earning $300,000 with minimal living expenses: DTI cap allows total debt up to $1,800,000. The 3% buffer might allow borrowing up to $1,400,000–$1,600,000 depending on the lender's expense model. Result: the buffer and DTI cap are both relevant, but the buffer is still likely the tighter limit. For most borrowers, the 3% serviceability buffer is the binding constraint. The 6x DTI cap primarily affects borrowers at the upper end of their income-to-debt range or those carrying significant existing debt.

What you can do to maximise borrowing power

Reduce existing debt before applying. A $20,000 car loan at 5% adds approximately $380 per month to your committed outgoings in the bank's serviceability calculator — that alone can reduce your mortgage capacity by $50,000–$70,000. Close unused credit cards. Even a $10,000 credit card limit with a zero balance is treated as a potential liability at the full limit — typically at 3.0%–3.8% of the limit per month in the expense calculation. Closing an unused $10,000 card can add $30,000–$40,000 to your borrowing capacity. Minimise living expenses where the HEM benchmark allows. The bank uses the higher of your declared living expenses and the HEM. If your declared expenses are above HEM, reducing discretionary spending for three to six months before applying can improve the calculation. Apply with a lender that treats your income type favourably. Some lenders accept 90% of bonus or overtime income; others only 50% or zero. Some lenders accept one year of self-employed financials with strong supporting evidence; others require two full years. Matching your income profile to the right lender's policy is often worth far more than a 0.10% rate difference. Data sources APRA confirmed the 3% serviceability buffer remains in place as at May 2026. The 6x DTI portfolio cap has been in effect since February 2026. Actual borrowing capacity depends on the lender's internal credit policy, living expense model, income treatment rules, and prevailing interest rates — the examples above are indicative only. Source: APRA, as at July 2026. Frequently Asked Questions Q: Does the 3% buffer apply to fixed-rate loans too? A: Yes. For fixed-rate loans, the buffer is applied to the product's revert rate (the variable rate the loan reverts to after the fixed period ends), not the fixed rate itself. This can be a constraint if the revert rate is significantly higher than the fixed rate. Q: What if my DTI is above 6 — can I still get a loan? A: Possibly. The 20% cap applies at the portfolio level, meaning each bank can allocate a limited number of high-DTI loans. You will need strong compensating factors: a large deposit, low LVR, stable professional income, and ideally an existing relationship with the lender. Expect more scrutiny and potentially a longer approval timeline. Q: Does the buffer ever change? A: APRA reviews the buffer periodically. It was reduced from 2.5% to the current 3.0% in October 2021 and has remained at 3.0% since. Any change would be publicly announced. If you are planning to buy in 2026-27, factor in the 3% buffer as a conservative baseline. Q: Can I borrow more through a non-bank lender? A: Non-bank lenders are not regulated by APRA and are not subject to the same buffer or DTI rules. However, they must still comply with responsible lending obligations, and their interest rates are typically higher than bank rates to compensate for looser credit standards. The trade-off is higher monthly repayments for higher borrowing capacity. Next steps Your maximum borrowing amount depends on the lender, the product, and how your specific income and expenses are treated under that lender's policy. An Arrivau licensed adviser can run your numbers against multiple lenders' serviceability calculators to identify where your borrowing capacity is strongest — and provide a realistic range before you start house hunting. An adviser will respond within one business day. Disclaimer: This article provides general information only and does not constitute financial or credit advice. APRA rules, lender policies, and interest rates may change. Consult a licensed mortgage adviser for a personalised borrowing capacity assessment. #borrowing-power#apra#serviceability#2026 Not sure what rate you'd get? Ask the AI — free, unbiased, and no sign-up required. It knows current Australian lending rules and can run the numbers for you. Ask the AI assistant → Keep reading Borrowing Power Self-employed borrowing power in 2026: how lenders read your income