01 Borrowing & leverage Reviewed 30 August 2026

Loan serviceability

Serviceability

A lender’s assessment of whether you can afford a loan and keep making repayments under stress.

01 / Plain English

What Serviceability means

The lender tests income, living expenses and existing debts, then assesses repayments at a higher rate than the loan rate to leave a safety margin.

02 / Decision context

Why it matters

Serviceability can cap borrowing even when you have a large deposit or substantial equity.

Current-law note

Timing changes the answer

APRA-regulated banks must currently apply a mortgage serviceability buffer of at least 3.0 percentage points above the loan rate, unless APRA determines otherwise. Lenders also apply their own assessment rules.

Take the next step

A definition cannot see your position. Heyward can.

Start with: “What is constraining my serviceability and which inputs matter most?”

Ask Heyward
03

Sources

Primary & official where available
  1. APRA APS 220 Credit Risk Management
  2. APRA APG 223 Residential Mortgage Lending

General educational information only. It does not account for your objectives, financial situation, legal position or tax circumstances.