Bridging loans in Australia: how they actually work, and when they bite

Bridging loans are less about your finances and more about your suburb. A borrower on a $400k income with a pristine credit file can still get burned by a bridging loan if the old home sits on the market for five months in a cold patch. A borrower with thinner numbers but a property in a suburb where stock clears in 18 days will usually be fine. The risk lives in the market, not the application form.

That's the most important sentence in this article, and most of what follows is the math behind it.

What a bridging loan actually is

A bridging loan is short-term finance that covers the gap between buying a new home and selling the old one. The lender rolls your existing mortgage, the new purchase price, and the purchase costs into a single combined facility called the "peak debt." Once your old home sells, the sale proceeds pay down the peak, and what remains is your ongoing "end debt," which is a normal mortgage against the new property.

It is not a special product class so much as a structural wrapper around two mortgages, with one quirk: most lenders capitalise the interest on the bridging portion. You don't make monthly repayments on the peak-debt interest. It accrues and gets added to the balance, which is settled from the sale proceeds. That sounds convenient and is, until the sale takes longer than expected.

How it differs from a standard mortgage

A standard mortgage has one property, one balance, and monthly repayments. A bridging loan has two properties, two balance components (peak debt and end debt), and usually one of them is interest-capitalising rather than paying down.

The other structural difference is the term. Bridging facilities in Australia typically run 6 to 12 months, with 6 months being the standard offer and 12 the upper bound for residential bridges. If your old home hasn't sold by the deadline, most lenders will require a forced sale, refinance, or re-application under harsher terms. That deadline is the part most borrowers underestimate.

Current rates and what they cost

In mid-2026, bridging rates sit roughly at the RBA cash rate plus 2-3%. With the cash rate near 4.10%, that puts bridging product pricing around 6.5% to 7.5% on the better-priced facilities and 8% to 9% on the weaker end. The rate applies to the full peak debt, not just the new portion, so the cost compounds quickly on larger balances.

For context, plug a representative peak-debt figure into the mortgage calculator to see the monthly interest cost at 8.5%. A $1.6M balance at that rate accrues roughly $11,300 per month in interest. That is your meter, and it runs from settlement of the new home until the old one is gone.

A worked example

Take a household buying their next home at $1.2M while still holding the existing home (modelled to sell at $900k) with a $500k mortgage still owing. Set aside stamp duty and costs for a moment; those vary by state and are covered in the stamp duty calculator if you want the exact figure for your purchase.

Peak debt is $500k (existing loan) + $1.2M (new purchase) = $1.7M, less any cash deposit. Assume the buyer puts $100k of their own cash in. Peak debt: $1.6M. At 8.5% per annum, that accrues roughly $11,333 per month in capitalised interest.

If the old home sells in 6 months at the modelled $900k, the capitalised interest is about $68,000. Sale proceeds clear the $500k original loan, leave $400k toward the peak, and end debt sits at roughly $1.6M minus $400k plus the $68k of capitalised interest, or about $1.27M. That's your new long-term mortgage on the $1.2M home — higher than the headline purchase price because the bridging interest got rolled in.

Now stress it. Same scenario, old home sells in 9 months at $880k (a soft 2% under expectations). Capitalised interest climbs to about $102,000. Sale proceeds clear the $500k original loan and leave $380k for the peak. End debt now sits around $1.32M. The extra three months and the $20k price miss together added roughly $54k to the long-term loan balance.

The takeaway from the arithmetic: time is the dominant variable. A 2% price miss matters, but a three-month delay matters more.

When a bridging loan makes sense

Three conditions need to hold at once. The new property is genuinely the right home (not opportunistic, not speculative). The old property sits in a suburb with healthy demand and recent comparable sales clearing within 30 days. The household has enough buffer in serviceability to absorb the capitalised interest if the sale slips by a quarter without forcing a distress price.

Upgraders who've found their dream home before listing the current one are the canonical case. Downsizers buying a specific unit off-plan with a tight settlement are another. Both share the same shape: the buyer has identified a non-substitutable property, and the sale of the existing home is the only flexible variable.

When it doesn't

Bridging tends to go wrong in three patterns. First, the local sales market softens after the new property is committed to; average days on market widens from 25 to 60, and the borrower is now racing a clock that's moving faster than the market. Second, the borrower over-estimates the existing home's sale price by 5-10% and refuses to drop the listing as the bridge term shortens. Third, the new purchase is speculative: a holiday home, an investment property, an off-plan unit that wasn't the household's irreplaceable next home. In that third case, a bridging loan amplifies an already-marginal decision.

The 30-day rule of thumb

A practical decision threshold: if recent comparable sales in the existing home's suburb have been clearing in 30 days or fewer (days on market measured from listing to unconditional contract), bridging is a reasonable risk. If DOM has been sitting at 45+ days, bridging is dangerous regardless of how strong the borrower's balance sheet looks. The rate the lender quotes you is roughly the same in both markets; the cost of the loan is wildly different because time-in-market is what determines total capitalised interest.

Most state property data services publish median DOM by suburb. Cross-check it against agent expectations rather than accepting either figure alone. Agents will often quote a median that excludes withdrawn-and-relisted properties, which flatters the headline number.

Where to dig deeper

Before signing a bridging facility, run your borrowing capacity on the post-sale end debt with the borrowing power calculator. If the end debt would push you outside what a normal serviceability assessment allows, you're relying on a clean sale to bring you back inside the lender's rules. The APRA serviceability buffer explainer walks through why that buffer matters more during a bridge than at any other time in a mortgage's life. Downsizers considering a bridge should also read the downsizing financial implications piece, which covers the interaction between bridging, CGT main-residence rules, and pension-eligibility tests.

Bridging loans aren't inherently risky or inherently safe. They're a tool calibrated to one variable: how long your old home will take to sell. Get that estimate right and the loan is a useful piece of plumbing. Get it wrong by 90 days, and you're funding $30k of capitalised interest you didn't plan to fund.