What is serviceability?
Serviceability is the lender's assessment of whether you can comfortably repay the loan on a stressed rate (current rate plus APRA's 3% buffer), after living expenses, taxes and other commitments.
Serviceability is the calculation a lender runs to decide if you can afford the loan. They take your verified income, subtract tax, the HEM household-expense benchmark (or your actual declared expenses if higher), all existing debt repayments, and then check if the remainder covers the new loan repayment at a stressed rate.
APRA requires lenders to assess serviceability at the actual rate plus a 3.00% buffer — so a 6.00% home loan is stress-tested at 9.00%. This is what keeps maximum borrowing capacity lower than naive (rate × balance) maths would suggest, especially for high-income but high-expense households.
Serviceability is the single biggest constraint on how much you can borrow. Increasing income, paying down credit cards (the full limit counts as debt, not just the balance), and consolidating buy-now-pay-later all lift it. So does a longer loan term, which lowers the assessed monthly repayment.
loan serviceability · servicing capacity
- Pre-approval (conditional approval) — Pre-approval is a written commitment from a lender, valid 3-6 months, that they would lend you up to a stated amount sub…
- Household expenditure measure (HEM) — HEM is a benchmark of typical household living expenses by household size and income — lenders use it as the floor when …
- Debt-to-income ratio (DTI) — DTI is total debt (including the new home loan) divided by gross annual household income — APRA's benchmark for elevated…
General information only — not personal financial advice. Verified against https://ratesniffers.com.au/glossary on 2026-06-01.