APRA's DTI Cap Explained: What the 6x Income Rule Means for Borrowers

By Jason Given - 2026-08-31 - 7 min read

What the DTI cap is

From 1 February 2026, APRA introduced a debt-to-income (DTI) cap: banks cannot issue more than 20% of new loans where the borrower's total debt exceeds 6 times their gross income. This is a macroprudential tool designed to limit the build-up of highly leveraged lending across the banking system.

DTI is calculated by dividing your total debt by your gross annual income. Total debt includes all loans - home loan, investment loans, car loans, personal loans, credit card limits, and HECS/HELP debt. It is everything you owe, not just the new loan you are applying for.

For example, if you earn $150,000 per year, a DTI of 6x means a maximum comfortable total debt of around $900,000. But if you already have a $50,000 car loan and $20,000 in HECS, your available DTI headroom shrinks - those existing debts eat into the 6x limit before your home loan is even counted.

It is important to understand that this is a speed limit on banks, not a hard ban on individual borrowers. Banks can still approve loans above 6x DTI - they just cannot do too many of them. Think of it as a quota rather than a ceiling.

Who it affects most

The DTI cap does not affect all borrowers equally. Some groups are significantly more exposed than others:

• -Property investors building multi-property portfolios. Existing debt from other investment properties counts towards your DTI. A borrower with two existing investment loans is far more likely to breach 6x when adding a third property.
• -High-income borrowers in expensive markets who need large loans relative to income. Even a borrower on $200,000 can breach 6x when purchasing in Sydney or Melbourne at $1.3M+.
• -Borrowers with existing debts - car loans, personal loans, and HECS/HELP all count. A $40,000 car loan can be the difference between being under or over 6x.
• -Couples where one income is lower. The combined DTI may be fine, but some lenders assess individual DTI as well, which can create issues where one partner carries more debt.
• -Single income buyers in Adelaide stretching for properties near $900k+. With the Adelaide median approaching $1M, a single buyer on $120,000 needs to be very careful about where they land on the DTI scale.

How lenders are applying it

Each bank manages its own 20% quota internally. Some are conservative and keep well under the limit, while others run closer to the cap. This means the same borrower with the same financials can be approved at one bank and declined at another - not because they are a bad borrower, but because that bank's high-DTI quota for the quarter is already full.

If a bank's high-DTI pipeline is full, they will decline or defer the application even if the borrower is otherwise strong. This makes timing and lender selection more important than ever before.

Non-bank lenders are not subject to APRA's DTI cap. APRA regulates Authorised Deposit-taking Institutions (ADIs) - banks, credit unions, and building societies. Non-bank lenders sit outside this regulatory framework, which means they have no DTI quota to manage. This is a significant advantage for borrowers who sit above 6x DTI, and it is one of the reasons non-bank lending volumes have increased sharply since the cap was introduced.

Different lenders also calculate DTI differently. Some exclude HECS/HELP from total debt, some include it. Rental income from investment properties is treated differently across lenders - some shade it at 80%, others at 70%, and some use different methods entirely. These calculation differences can move a borrower from above 6x to below 6x without changing anything about their actual financial position.

What you can do

If you are likely to be near or above 6x DTI, there are practical steps you can take to improve your position:

• 1.Pay down existing debts before applying. Car loans, credit cards, and personal loans all count towards your total debt. Clearing a $30,000 car loan before applying reduces your DTI by the equivalent of $30,000 in borrowing headroom.
• 2.Close unused credit card limits. Lenders count the credit card limit, not the balance. A credit card with a $15,000 limit and a $200 balance adds $15,000 to your total debt for DTI purposes. Close cards you do not need.
• 3.Consider non-bank lenders if you are above 6x. Non-bank lenders are not subject to the APRA DTI cap. Lendology accesses a full non-bank panel alongside the major banks, so we can place loans where DTI would otherwise be a barrier.
• 4.Structure loans to minimise DTI impact. Interest-only on investment loans reduces the assessed debt in some lender calculations. Loan structuring can make a meaningful difference to where you sit on the DTI scale.
• 5.Get your borrowing capacity assessed before house hunting. Know your number before you start looking. Lendology calculates your DTI and borrowing capacity across multiple lenders so you know exactly where you stand.