APRA Serviceability Changes: Impact on Borrowing and Rates

APRA (Australian Prudential Regulation Authority) sets the prudential standards that banks must follow when assessing mortgage serviceability. Changes to APRA guidelines ripple through the lending market, affecting how much you can borrow and what rates lenders charge.

In 2023, APRA tightened serviceability requirements. Banks were previously assessing borrower serviceability at a 2.5% interest rate buffer above the loan’s current rate. APRA increased this to 3.0%, forcing banks to stress-test borrowers on higher rates. For a borrower on a 6.0% variable, the old buffer was 8.5%; the new buffer is 9.0%.

This change reduced borrowing capacity. A borrower previously approved for a $500,000 mortgage might now only be approved for $450,000 because the higher stress-rate test fails on the larger amount. Across Australia, the market saw a 2–3% reduction in borrowing capacity as a result.

Banks responded by raising interest rates slightly (0.1–0.2%) to offset the reduced volume, tightening margins, and being more selective on approvals. Mortgage brokers reported increased difficulty getting “fringe” applications (self-employed, recent immigrants, gig workers) approved under the tighter standards.

APRA also mandated that banks apply stricter assessment rules for loans over 80% LVR. Borrowers with small deposits face higher rates (0.3–0.5% premium) under these tighter rules. Some banks reduced their maximum LVR from 95% to 90%, further limiting high-deposit-ratio lending.

The interest rate environment affects APRA’s positioning. When rates are rising, APRA tightens standards to prevent borrowers from over-leveraging at low rates; when rates are falling (as in early 2026), APRA sometimes signals relaxation of requirements, allowing banks to lend slightly more aggressively.

Geographical variation exists. APRA sets national standards, but banks interpret and implement them with slight differences. A borrower declined by one bank’s strict interpretation might be approved by another bank’s more lenient reading of the same rules. This is why mortgage broker shopping is valuable.

The floor rate (minimum rate for stress-testing) is also set by APRA. Previously, banks used 3.0% as the minimum stress-test rate; APRA has occasionally adjusted this. If APRA lowers the floor rate in a declining rate environment, stress-testing becomes easier and borrowing capacity increases.

APRA changes are forward-looking and sometimes pre-emptive. In 2022, as rates began rising, APRA tightened serviceability in anticipation of stress. By the time rates peaked in 2023, APRA had already restricted borrowing capacity, protecting borrowers from the most extreme over-leveraging.

Refinancing is affected by APRA rules. When you refinance, the new lender re-assesses your serviceability under current APRA standards, not the standards that applied at your original loan. If APRA has tightened since you took out your mortgage, you might struggle to refinance into a larger loan even though your income has grown.

Investment property lending faces particular APRA scrutiny. APRA has signaled that investment property lending should be conservative because it’s seen as riskier than owner-occupier lending. Rates on investment property mortgages are 0.3–0.8% higher partly because banks are required to be more conservative under APRA’s principles.

Disclaimer: This article provides general information only and should not be taken as financial or legal advice. APRA standards, stress-test rates, and implementation vary. Consult your mortgage broker before applying.