APRA Holds 3% Mortgage Buffer Amid Global Uncertainty

Australia's banking regulator has left all mortgage controls unchanged, citing elevated inflation and Middle East uncertainty as reasons to hold firm.

If you were hoping Thursday's update from the banking regulator might ease the affordability test on your home loan, the Australian Prudential Regulation Authority (APRA) has a clear message: not yet. Following its latest macroprudential review, APRA has decided to leave all of its mortgage controls exactly where they are — no loosening, no tightening.

The key setting for most borrowers is the serviceability buffer. As [The Adviser](https://www.theadviser.com.au/compliance/48490-apra-keeps-serviceability-settings-steady-amid-uncertainty) reports, lenders must still test your ability to repay at an interest rate 3 percentage points above the actual product rate. In plain terms, if you're applying for a home loan at 6.00%, your bank must check you can afford repayments at 9.00%. That single test shapes how much you can borrow more than almost any other factor — and APRA has confirmed it isn't changing.

Use the [borrowing power calculator](/calculators/borrowing-power) to see how the buffer affects your maximum loan size in practice.

Why the Regulator Is Holding Firm

APRA's decision to stand pat is not a sign of complacency — it's a deliberate response to a mixed and volatile economic backdrop. APRA chair John Lonsdale laid out the key concerns plainly: "Since APRA's last update, there has been a shift in the macro-economic outlook. Interest rates have increased over recent months amid elevated inflation. The conflict in the Middle East is impacting economic and financial conditions in Australia, as higher oil prices add to cost pressures for households and businesses."

That's a pointed observation. Rising oil prices flow through to petrol, freight, and utilities — all of which squeeze household budgets and can affect a borrower's ability to service their mortgage. APRA's job is to stress-test banks and borrowers against conditions like these, and the buffer is one of its primary tools.

Lonsdale was candid about the road ahead: "Depending on global developments, these impacts could either ease or become more severe in the period ahead." In other words, the regulator isn't sure which way conditions move from here — and in that environment, removing safety nets would look premature.

What the Data Is Showing

APRA's March-quarter snapshot painted a picture of resilience, but with pressures building underneath. Housing credit growth was strong for investors and "around average" for owner-occupiers, though the regulator flagged "signs of moderation in housing price and credit growth." Business credit growth "remained above its historical average."

On loan quality, APRA said arrears and non-performing loans remain low and that banks are not pulling back on credit. "There is no evidence that the banking system is restricting credit supply to preserve capital positions in response to greater anticipated credit losses," Lonsdale said. That matters — it means the mortgage market is still open and functioning; the buffer is doing its job quietly without choking supply.

Where APRA did sound a watching note was on high debt-to-income (DTI) lending — loans to borrowers whose total debt is six times their income or more. Banks can still write up to 20 per cent of new owner-occupied and investor loans above this threshold. But the regulator noted that this type of lending "had been increasing over the past year" and said the limits would "remain in place as guardrails for now" given the uncertain outlook.

The countercyclical capital buffer — extra reserves banks must hold that can be drawn down if credit conditions deteriorate sharply — also stays at 1 per cent of risk-weighted assets. APRA said accumulated buffers across household finances and bank balance sheets mean "most households and businesses were well placed to weather the pressures."

What This Means for Your Borrowing Plans

In practical terms: the mortgage credit environment is stable but not getting easier from a regulatory standpoint in the near term. If you're buying, refinancing, or planning a purchase, the affordability rules you're being assessed against today are the same ones you'll face next month.

For owner-occupiers and first home buyers, the 3% buffer means your lender must confirm you can handle repayments at a rate materially above what you'll actually pay. That's not purely a bad thing in a volatile environment — it means you have a built-in margin if rates move. But it does tighten the ceiling on how much you can borrow relative to your income.

For investors, the DTI guardrails matter. Existing investment debt counts heavily against your serviceability calculation, and the 3% buffer stacks across your whole portfolio. Head to the [investor home loans hub](/home-loans/investor) to understand how lending for property investors is assessed.

If you're looking to [refinance](/home-loans/refinance) — particularly if your rate has crept up since you first took the loan — it's worth running the numbers on whether switching still makes sense. The [refinance savings calculator](/calculators/refinance-savings) is a good starting point. APRA has committed to its regular review cycle and will adjust settings if the evidence warrants it. For now, that evidence says: hold.