Why the 8.2 price-to-income ratio doesn't tell you if you can afford a home

Australia's national price-to-income ratio is 8.2, well above the long-term average of 6.8. That number sounds alarming, but it isn't what your bank actually uses to assess your loan.

Australia's national house-price-to-income ratio sits at 8.2 according to Cotality's Housing Affordability Report — meaningfully above the long-term average of 6.8. Property Update analyst Joseph Ballota at Metropole notes the headline figure: a median dwelling price of $900,000 divided by a median household income of $110,000 lands at roughly 8x. That number is true. It also isn't what your bank actually uses to decide whether to lend you the money to buy. For prospective borrowers, the gap between the affordability headline and the loan-application math is where most of the practical action sits — and ignoring it leads people to either give up on the market or buy something they can't actually service.

What the 8.2 ratio actually is — and why it overstates the problem

The price-to-income ratio is a single number designed to compare house prices with wages over time. It's useful for spotting structural shifts in affordability across decades, and the move from 6.8 historical to 8.2 today is real. But the ratio assumes a single-earner household using cash to buy at the median price — a setup that doesn't describe most modern Australian buyers.

Three things the ratio doesn't capture, all of which materially change real-world affordability:

- **Interest rates.** A loan at 5.5% costs a different amount to service than one at 7.5%, even though the price-to-income ratio is identical. Your repayment capacity is set by the rate, the term, and the principal — not the headline price. - **Dual-income households.** A household earning $110,000 between two earners can typically borrow more than a household earning $110,000 from one earner, because lenders weight serviceability against the lower-risk household structure. - **Equity from prior ownership.** Most upgraders aren't buying with cash savings — they're rolling equity from an existing home into a new mortgage. That equity doesn't show up anywhere in the price-to-income figure.

What banks actually look at

When your bank assesses your loan, the headline price isn't the input. The input is **mortgage repayments as a share of income** — usually expressed as a debt-service ratio (DSR) — plus a serviceability buffer that lifts the assessment rate by 3 percentage points above the rate offered. APRA's prudential framework requires that buffer; lenders can choose to be tighter, but not looser.

As Property Update points out, this servicing-cost framing is what actually moves with the rate cycle. When rates rose from the post-2020 lows to 3.85% today, the price-to-income ratio barely shifted — but the share of monthly income going to mortgage payments rose sharply. That's the real affordability constraint.

For a $700,000 loan, here's what changes between 4.5% and 5.5% variable on a standard 30-year P&I:

- 4.5%: monthly repayment ~$3,547 - 5.5%: monthly repayment ~$3,975 - Difference: ~$428/month, or ~$5,140/year

Neither number changes if the median dwelling price stays at $900,000. The price-to-income ratio doesn't move. But a household at the affordability margin feels every basis point of that interest-rate gap.

What this means for first-home buyers

The 8.2 figure can be paralysing if you read it wrong. The honest version of the conversation is this: the median dwelling price is the wrong reference for most FHBs. Most first-home buyers in capital cities buy below the median — because the median includes the family-sized 4-bedroom houses that two-earner households with children buy at a later stage, not the starter apartments and units that FHBs actually purchase.

A more practical exercise:

1. Use our [borrowing power calculator](/calculators/borrowing-power) to find what you can actually borrow given your income, expenses, and existing debts. 2. Layer on the deposit you have plus stamp duty (~4–5% of purchase price) to get your max purchase budget. 3. Search the actual market in that budget — not the median.

Most FHBs find their realistic budget falls 20–35% below the metropolitan median. That doesn't make the 8.2 ratio fake; it just makes it the wrong number to be staring at while you're deciding whether to buy.

What this means for existing borrowers

If you're already in the market, the price-to-income figure is mostly an academic interest. What matters is the share of your household income going to your mortgage, and whether that share is rising, falling, or stable as rates move.

If your DSR has crept above 35–40% of gross income, that's the signal to act — not when the headline ratio crosses 8 or 9. Practical actions that move the DSR:

- A rate review with your existing lender — typical retention discount is 20–40 basis points without switch costs. - A refinance — model the impact via our [refinance savings calculator](/calculators/refinance-savings) before committing to switch costs. - An offset structure — even idle cash earns its keep against your mortgage, lowering the effective DSR.

The takeaway

The 8.2 price-to-income ratio captures a real long-term shift in Australian housing — but it isn't the number that decides whether you, specifically, can afford to buy a specific home. Banks don't use it. Brokers don't use it. The math that matters is the monthly servicing cost on the loan you'd actually take out, against the household income you actually have, with a buffer for rate movement.

This article references analysis published by Michael Yardney's Property Update piece [Why price-to-income ratios don't really explain what's happening in Australia's housing market](https://propertyupdate.com.au/why-price-to-income-ratios-dont-really-explain-whats-happening-in-australias-housing-market/), drawing on Cotality's national Housing Affordability Report.