Do you know what housing affordability really means?

What Housing Affordability Actually Measures

Housing affordability measures whether you can service a loan, not just whether you can save a deposit. Lenders assess your income against the proposed repayment at a buffer rate, typically 3% above the actual rate you'll pay. If your gross income can't service the loan at that buffered rate, the property remains unaffordable regardless of how much deposit you've saved.

Consider someone earning $95,000 annually in Brisbane who's saved a 10% deposit. They're looking at properties where the repayment at current variable rates sits around $2,800 per month. That looks manageable. But the lender tests that same loan at a rate roughly 3% higher, pushing the test repayment closer to $3,600 per month. If other commitments like car loans, credit card limits, or childcare costs push their total obligations too high, the application won't proceed. The deposit isn't the constraint. Borrowing capacity is.

This calculation explains why two buyers with identical deposits can have completely different outcomes. One clears serviceability because they've closed unused credit cards and paid down a car loan. The other doesn't, despite having the same deposit saved.

How Loan Structure Changes What You Can Borrow

The way a loan is structured directly affects how much a lender will approve. A variable rate loan serviced over 30 years with principal and interest repayments will typically allow you to borrow more than the same loan with a 25-year term, because the monthly repayment is lower. That difference can be $40,000 to $60,000 in borrowing power, depending on your income and other commitments.

Split loans offer another option. You fix a portion of the loan to lock in repayments on that part, and leave the remainder on a variable rate with an offset account attached. The fixed portion doesn't allow extra repayments without penalty, but it removes the risk of rate rises on that part of the debt. The variable portion gives you flexibility to pay down the loan faster if your income increases. In our experience, buyers who use a split structure often fix around 50% to 70% of the loan, leaving enough on the variable side to make meaningful progress if circumstances improve.

A buyer looking at a property in Kedron might split $450,000 in total borrowing into $300,000 fixed for three years and $150,000 variable with a linked offset. The fixed portion provides certainty during a period when rates might move. The variable portion allows them to park savings in the offset account and reduce interest on that part of the loan immediately. Over three years, if they can add $20,000 to the offset, the interest saved on the variable portion compounds. When the fixed period ends, they can reassess whether to fix again, revert to variable, or adjust the split based on what's happened with their income and the rate environment.

That structure doesn't increase what they can borrow initially, but it does give them more control over how quickly they reduce the debt once the loan settles. It also means they're not entirely exposed if rates rise, and not entirely locked in if they fall.

Brisbane Suburbs Where Affordability Still Exists

Affordability in Brisbane varies significantly by suburb. Areas like Woodridge, Inala, and parts of Logan still offer entry points under the current median for greater Brisbane, but those areas also tend to have lower household incomes and less access to infrastructure compared to inner-ring suburbs. Buyers need to weigh the lower entry price against longer commutes, fewer schooling options, and potentially slower capital growth.

Suburbs like Keperra, Zillmere, and Banyo sit closer to the city and near train lines, which makes them more attractive for buyers working in the CBD or inner north. Prices in those areas have risen, but they still offer more realistic entry points than suburbs like Paddington or Bardon. The trade-off is older housing stock and less gentrification, which can mean higher maintenance costs in the short term.

For buyers who can stretch their borrowing slightly further, suburbs like Stafford, Chermside, and Nundah offer better amenity and stronger long-term growth prospects. Those areas have established shopping precincts, schools, and transport links, which makes them more resilient in a downturn. They also attract a wider range of buyers when you eventually sell, which improves liquidity.

How Deposit Size Affects Loan Features

Deposit size determines whether you pay Lenders Mortgage Insurance and what loan features you can access. A deposit below 20% of the property price triggers LMI, which protects the lender if you default. That cost gets added to your loan amount, which increases your repayments and reduces your equity from day one.

A deposit of 20% or more avoids LMI and usually unlocks lower rates and better loan features. Some lenders offer offset accounts and rate discounts only to borrowers with at least 20% equity. Others will provide those features at lower deposits but charge a higher interest rate to compensate for the increased risk.

If you're close to 20% but not quite there, it's worth checking whether delaying the purchase by a few months to save the additional amount will save you more in LMI and interest than the potential price growth during that period. In a rising market, waiting can cost you more than the LMI. In a flat or falling market, waiting usually makes sense.

How Offset Accounts Improve Affordability Over Time

An offset account linked to your variable home loan reduces the interest you're charged without requiring you to make extra repayments into the loan itself. Every dollar in the offset reduces the balance on which interest is calculated. If you have a $400,000 loan and $25,000 sitting in a linked offset, you only pay interest on $375,000.

That structure matters for buyers who receive irregular income, like bonuses, commissions, or contract payments. Instead of making lump sum payments into the loan, which you can't easily access again, you can park the funds in the offset and retain access if something unexpected happens. The interest saving is identical to making an extra repayment, but the liquidity is far higher.

Offset accounts are typically only available on variable rate loans or the variable portion of a split loan. If you fix your entire loan, you lose access to that feature for the fixed period. That's one reason why many buyers choose to keep at least part of their loan variable, even if they want the certainty of a fixed rate on the majority of the debt. For more on how this works when your fixed term ends, see our page on fixed rate expiry.

What Pre-Approval Tells You About Affordability

Pre-approval confirms how much a lender will let you borrow based on your current income, commitments, and deposit. It doesn't lock in a rate, but it does give you a clear borrowing limit before you start looking at properties. That limit is based on the lender's serviceability assessment, so it accounts for the buffer rate and any other debts or obligations you're carrying.

Pre-approval is usually valid for three to six months, depending on the lender. If your circumstances change during that period, such as a pay rise, a new debt, or a change in employment, the lender will reassess before final approval. If nothing changes, pre-approval speeds up settlement because the lender has already verified your financial position.

In practice, buyers with pre-approval can move quickly when they find a property, which matters in competitive markets or when dealing with motivated sellers. It also removes the uncertainty about whether the loan will be approved, which reduces the risk of losing your deposit if finance falls through. You can read more about how to apply for a home loan and what's involved in the approval process.

When Refinancing Improves Affordability

Refinancing replaces your current loan with a new one, usually to access a lower rate, better features, or to release equity for another purpose. If rates have dropped since you took out your loan, or if your lender hasn't passed on recent rate cuts, refinancing can reduce your repayments or allow you to pay off the loan faster without increasing what you pay each month.

Some buyers refinance to consolidate other debts into the home loan, which reduces the total monthly repayment by spreading those debts over a longer term at a lower rate. That improves serviceability, which can make it possible to borrow again for an investment property or to upsize. The trade-off is that you're paying interest on those debts for much longer, so the total cost increases even though the monthly repayment drops.

Refinancing also makes sense if your current loan lacks features like an offset account or portable loan structure. A portable loan allows you to transfer the loan to a new property without breaking the fixed rate or refinancing again, which saves on exit fees and application costs. If you're planning to move within a few years, that feature is worth paying attention to. For more detail on when refinancing makes sense, see our refinancing page.

Call one of our team or book an appointment at a time that works for you. We'll assess your income, commitments, and goals, then structure a loan that fits your circumstances and gives you room to move as things change. You can book an appointment directly or reach out to discuss what's possible based on where you're starting from.

Frequently Asked Questions