APRA Borrowing Power 2026: How the 3% Buffer + 6× DTI Cap Determines Your Maximum Loan

How much can you borrow for a home loan in Australia in 2026? The short answer: a single earner on $100,000 with no dependants or debts can borrow approximately $500,000 to $530,000. A couple on $200,000 combined can borrow approximately $1.05 million to $1.15 million. These numbers are not set by the bank's advertised rate — they are dictated by APRA's 3% serviceability buffer, which forces lenders to assess your ability to repay at roughly 9.2% to 9.5%, regardless of the rate you actually sign up for. Here is the full picture of what determines your borrowing capacity, and how to maximise it under current rules.

Data source and as-at date

All figures in this article reflect APRA's macroprudential settings as confirmed at the July 2026 quarterly review. The 3% serviceability buffer remains unchanged. The countercyclical capital buffer remains at 1% of risk-weighted assets. The high-DTI lending cap — requiring banks to keep new lending at a debt-to-income ratio of 6 or above to no more than 20% of new loans per portfolio — has been in force since February 2026. Owner-occupier variable rates are taken at approximately 6.2% to 6.5% (RBA cash rate 4.35%). All borrowing power examples are estimates using standard HEM living expense benchmarks and assume no other liabilities unless otherwise stated.

How the 3% Buffer Translates to Real Borrowing Power

The buffer works simply but its effect is dramatic. If your actual loan rate is 6.3%, the bank must assess whether you can afford repayments at 9.3%. At 6.3%, a $500,000 loan costs about $3,100 per month in principal and interest repayments over 30 years. At 9.3%, that same loan costs about $4,130 — a 33% increase. The bank tests you against the higher number.

Here is what the buffer does to maximum borrowing at different income levels, comparing assessed-at-actual-rate versus assessed-with-3%-buffer:

Single earning $80,000:

Without buffer (assessed at 6.3%): could borrow approximately $550,000
With 3% buffer (assessed at 9.3%): can borrow approximately $400,000 to $420,000
Reduction: roughly $130,000 to $150,000 (24-27% less)

Single earning $120,000:

Without buffer: approximately $860,000
With buffer: approximately $600,000 to $640,000
Reduction: roughly $220,000 to $260,000

Couple earning $200,000:

Without buffer: approximately $1,430,000
With buffer: approximately $1,050,000 to $1,150,000
Reduction: roughly $280,000 to $380,000

Couple earning $300,000:

Without buffer: approximately $2,170,000
With buffer: approximately $1,600,000 to $1,750,000
Reduction: roughly $420,000 to $570,000

The pattern holds across all income levels: the buffer removes roughly 20% to 30% of what a simple rate-based calculation would allow. Higher-income borrowers experience a smaller percentage reduction because living expenses assessed under the HEM (Household Expenditure Measure) take up a smaller share of their income, but the absolute dollar reduction is larger.

The 6× DTI Cap: When It Bites and When It Does Not

The 6× debt-to-income cap works differently from the buffer. While the buffer applies to every single loan application, the DTI cap is a portfolio-level restriction — banks may not exceed 20% of new lending at DTI of 6 or above. For individual borrowers, this means:

If your total debt (including the proposed mortgage, any existing home loans, car loans, personal loans, and HECS) divided by gross annual income equals 6 or above, the bank can still approve you, but you are competing for a limited allocation within that bank's lending book. In practice, banks may apply internal DTI limits that are stricter than the regulatory cap to stay comfortably within the 20% threshold.

The DTI cap tends to constrict borrowing at higher income and debt levels:

Couple earning $150,000 with no other debt: maximum mortgage at 6× DTI = $900,000. The serviceability buffer at 9.3% would typically allow about $780,000 to $850,000, so the buffer remains the binding constraint.
Couple earning $250,000 with no other debt: maximum at 6× DTI = $1,500,000. The buffer allows about $1,300,000 to $1,450,000. The buffer still binds.
Couple earning $200,000 with a $40,000 car loan: maximum total debt at 6× = $1,200,000; after deducting the car loan, mortgage cap = $1,160,000. The buffer allows about $1,050,000. Still close, but the gap narrows.

For most first home buyers and moderate-income borrowers, the DTI cap is not the binding constraint — the buffer is. The DTI cap becomes relevant for high-income borrowers in expensive markets (Sydney, Melbourne) looking to borrow at or near their absolute maximum, or for investors with existing property debt.

The Invisible Drag: How Credit Cards, HECS, and Consumer Debt Reduce Your Borrowing Power

Three common items reduce borrowing capacity far more than most borrowers expect.

Credit cards. A $10,000 credit card limit reduces borrowing capacity by approximately $30,000 to $40,000 — even if the balance is zero. Lenders assess the full limit as a potential liability, not the current balance. If you have three cards with $5,000 limits each, that is $15,000 in assessed limits, reducing your maximum loan by roughly $45,000 to $60,000. Close unused cards and reduce remaining limits to the minimum needed before applying.

HECS-HELP debt. Lenders treat HECS as a liability deducted from net income. Under the 2026-27 marginal repayment system, a borrower earning $100,000 with a $50,000 HECS debt repays approximately $4,571 per year — about $380 per month. At a 9.3% assessment rate, this reduces borrowing capacity by roughly $40,000. Someone earning $140,000 with a $60,000 HECS debt repays approximately $7,300 per year — about $608 per month — reducing borrowing capacity by approximately $65,000.

Not all lenders treat HECS identically. Some subtract HECS repayments from net income before calculating serviceability. Others apply a flat income haircut. The difference can be material — a broker can identify lenders that are more favourable for applicants with significant HECS debt.

Car loans and personal loans. A $30,000 car loan at 8% over five years costs about $608 per month. At a 9.3% assessment rate, that payment consumes roughly $65,000 in borrowing capacity. Paying off the car loan before applying for a mortgage is almost always the correct financial sequence.

Non-Bank Lenders: Lower Buffers, Different Trade-offs

One pathway to higher borrowing capacity is applying through a non-bank lender. Non-ADI (authorised deposit-taking institution) lenders are not bound by APRA's 3% buffer. Some assess serviceability at 1.5% to 2% above the loan rate instead of 3%.

This translates to meaningfully higher borrowing capacity. A single borrower on $100,000 assessed at the loan rate plus 2% (approximately 8.3% total) could borrow approximately $570,000 to $600,000 — about $50,000 to $80,000 more than under the full 3% buffer.

The trade-off is the interest rate. Non-bank lenders typically charge 0.5% to 1.5% above the major bank variable rate. Whether the higher rate is worth the extra borrowing capacity depends on the property, the market, and how long you expect to stay at that rate. If you plan to refinance to a bank loan within two to three years once your equity position improves, the temporary rate premium may be outweighed by being able to purchase the property now rather than waiting.

How Different Income Types Affect the Assessment

Not all income is treated equally for serviceability:

PAYG salary (base). Lenders use 100% of base salary. This is the most straightforward income type and produces the most predictable borrowing capacity.

Overtime and bonuses. Most lenders use 80% of overtime and bonus income if it is consistent and documented over two years. Some use 100% if it is contractually guaranteed. If your overtime is irregular, some lenders may use 50% or zero.

Commission income. Typically assessed at 80% of the average of the last two years. If commissions are trending upward, the more recent year may carry more weight with some lenders.

Rental income. The income from an investment property or boarders is generally assessed at 75% to 80% of gross rent. This haircut accounts for vacancies, management fees, maintenance, and rates. If you are buying an investment property, the rental income from the property being purchased is assessed at this haircut and counted toward serviceability.

Self-employed income. A separate topic beyond this article, but the key number is that lenders typically want two years of business financials and tax returns. One-year ABN and alt-doc loans exist through non-bank lenders but at higher rates.

Use our borrowing power calculator to model your specific scenario with your real income mix, debts, and living expenses.

What Would Change These Numbers?

APRA could reduce the buffer if the cash rate falls. A reduction from 3% to 2.5% — a plausible scenario if rates ease — would lift borrowing capacity by roughly 6% to 10% for most borrowers. A reduction to 2% would lift capacity by 12% to 18%. These are not currently expected — APRA's July 2026 review left the buffer unchanged and cited a volatile risk landscape including Middle East conflict and oil price pressures.

If the cash rate falls by mid-to-late 2027 as the three major banks forecast, the assessed rate would fall even with the buffer unchanged. A cash rate of 3.35% with a 3% buffer and typical bank margin would put the assessment rate around 7.8% to 8.1%, up from about 7.2% to 7.5% if you assume bank margins compress slightly. That would substantially improve borrowing capacity.

For now, the 9.2% to 9.5% assessment rate is the reality. Budget for it.

FAQ

How do I calculate my borrowing power without a broker? Input your gross income, existing debts (credit card limits, car loans, HECS), number of dependants, and approximate living expenses into a reputable borrowing power calculator. The result is an estimate — actual borrowing capacity varies by lender policy. Our borrowing power calculator provides a lender-style assessment using current buffer and expense benchmarks.

Why does my HECS debt reduce borrowing power even if repayments are small? HECS repayments are a mandatory deduction from your income. Because the bank assesses you at a higher interest rate (the buffer), any fixed monthly deduction gets amplified. A $380 monthly HECS repayment at 9.3% assessment rate consumes about the same serviceability as $40,000 of mortgage principal. The logic is that in a stress scenario, you still have to make both payments.

Should I pay off my car loan or close my credit card first? Car loans consume more borrowing capacity per dollar of debt because the monthly repayment is mandatory and fixed. A $30,000 car loan at $608/month typically reduces capacity by $65,000. A $30,000 credit card limit typically reduces capacity by $90,000 to $120,000 — more, but only because of the high cap. Pay off the car loan if you can, but close unused credit cards regardless.

Do all banks use the same HEM living expense benchmark? All major lenders use some form of the Household Expenditure Measure, but there are variations in how it is applied. Some lenders use a higher HEM multiple for higher-income borrowers. Others add a buffer to HEM. A small number of lenders allow you to substitute actual living expenses if they are below HEM, but this requires detailed bank statement documentation.

Will fixing my rate increase my borrowing power? No. For serviceability assessment, fixed-rate loans are assessed against the revert rate — the variable rate the loan will roll onto after the fixed period ends — plus the 3% buffer, not against the fixed rate. Fixing your rate locks in certainty on your repayments but does not improve your assessed borrowing capacity.

This article provides general information only and does not constitute financial, tax, or legal advice. Borrowing power estimates are illustrative only; actual outcomes depend on lender policy, your complete financial profile, and credit assessment. APRA settings are current as at July 2026. For personalised borrowing advice, consult an Arrivau-licensed advisor — you can expect a response within one business day.