Buying and Selling a House at the Same Time: Bridging and the Alternatives (2026)

Most homeowners moving from one property to another face the same timing puzzle: do you sell your current home before buying the next, or buy first and sell later? Neither path is clean. This article lays out the core strategies, their real costs and failure points, and a framework to help you think through which suits your situation.

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The Core Dilemma: Sell First or Buy First?

The two default strategies each carry a distinct form of risk.

Sell first, buy later gives you certainty of funds. You know exactly what you cleared from the sale, your equity is confirmed, and your next mortgage is straightforward to arrange. The downside is the gap. If you cannot move straight into your next purchase, you may need short-term accommodation: renting, staying with family or delaying settlement on the sale by negotiating a longer period. In competitive markets, sellers who have already sold can also appear motivated, which can affect negotiating leverage on the buy side.

Buy first, sell later solves the gap problem: you move into your new home, then sell the old one at your own pace. The risk is financial exposure. Until the old property sells, you are servicing two loans. If the sale takes longer than expected, or achieves a lower price than you assumed, the gap has to be funded somehow. This is where bridging finance enters the picture.

There is no universally better path. The right approach depends on your financial position, your local market, the properties involved, and your tolerance for uncertainty. A mortgage broker and your solicitor or conveyancer are the right advisers for your specific situation.

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How Bridging Loans Work

A bridging loan is a short-term facility designed to cover the period between buying your new property and receiving the proceeds from selling your current one. CommBank describes it as providing short-term financing to buy a new property before selling the current one.

Peak Debt and End Debt

The key concept is peak debt. Using NAB's worked example as a reference: if you have a remaining mortgage of $250,000 on your existing property and you need $800,000 to buy the new one, your peak debt is $1,050,000. That is the maximum you owe at any point during the bridging period. When your old property sells and you receive the proceeds (say $600,000 in the NAB example), that amount reduces the peak debt to an end debt of $450,000. The end debt then rolls into your ongoing home loan.

Loan Terms

All four major Australian banks describe bridging terms of up to 12 months. CommBank states a maximum loan term of 12 months. ANZ describes the facility as lasting up to 12 months from settling the new home. Westpac calls it a short-term, 12-month loan. NAB notes the term is often up to 12 months. That outer limit is a deadline, not a guarantee; the loan needs to close when your property sells or when the term expires, whichever comes first.

Repayments During the Bridging Period

Repayments while you hold both properties are commonly structured as interest-only. NAB, CommBank and ANZ all describe this arrangement. Westpac goes a step further, listing its bridging repayment type as "Interest Only Capitalised", meaning interest can be added to the loan balance rather than paid monthly during the bridging window. That Westpac detail is specific to their product; the other banks describe interest-only without addressing capitalisation.

What Bridging Costs in Pressure

The financial cost of a bridging loan is the interest on peak debt for as long as the bridging period runs. The less visible cost is time pressure. With a 12-month outer limit and interest accumulating, there is a structural incentive to sell the old property as quickly as possible. A vendor under bridging pressure may accept a lower offer or worse terms than they would otherwise. That is not a reason to avoid bridging, but it is worth building into your thinking.

ANZ states borrowers can typically borrow up to 80% of the value of the new property as assessed by ANZ, which puts a ceiling on how much of the purchase can be funded through the bridging facility.

Westpac notes there is no redraw on a bridging loan, and that upfront costs such as stamp duty and legal fees can sometimes be added to the loan if sufficient equity allows.

Speak with your mortgage broker about the specific rates, fees and serviceability assessment that apply to you before proceeding.

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Simultaneous Settlement

Simultaneous settlement is an arrangement where the sale of your existing property and the purchase of your new one settle on the same day, typically within hours of each other. NAB's explainer and conveyancer guides from Provey and CJC Law all describe this structure.

The appeal is elegant: the proceeds from the sale fund the purchase on the same day, eliminating any bridging period. In practice, the two settlements are linked; a delay in one delays the other. A failed or late settlement can incur default interest and legal costs. Delayed loan approval is cited as the most common cause of same-day settlement failure.

For this reason, simultaneous settlement requires everything to go right at the same time. Documentation must be complete, your lender must be ready, and your conveyancer must have clear lines of communication with all parties. See our settlement timeline tool and the conveyancing guide for more on how that process runs.

Loan Portability

Where simultaneous settlement is not achievable but dates can be aligned, loan portability is an option worth discussing with your lender. Westpac describes an arrangement where the loan security transfers from the old property to the new one, meaning you keep the existing loan structure rather than paying it out and refinancing from scratch. Not all loans and lenders support this; ask your broker.

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Subject-to-Sale Offers

A subject-to-sale offer is a conditional offer on a new property that is contingent on the successful sale of your current home. REIWA describes this as a buyer making an offer with a condition attached.

The advantage for you as a buyer is reduced risk: you do not proceed with the purchase unless your existing property sells. The disadvantage is negotiating position. In competitive markets, offers with fewer conditions are more attractive to sellers, as McKean McGregor notes.

Most subject-to-sale contracts include a 48-hour clause. REIWA describes this as: if another buyer makes an offer on the property you want, you are given 48 hours to either go unconditional (dropping the subject-to-sale condition) or withdraw from the contract. White House Property Partners notes that the seller can continue marketing the property during this period. The 48-hour clause means you may face a time-pressured decision: go unconditional before your property is sold or lose the property you want.

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Rent-Back Arrangements

A rent-back is a post-settlement arrangement where you sell your property but then lease it back from the buyer, allowing you to remain in the home temporarily while you complete your onward purchase. Domain notes that a formal agreement should always be drawn up.

The practical variation depends on how long the rent-back runs and which state you are in. In Queensland, MAP Lawyers note that a rent-back of 28 days or less can be structured as a licence agreement, while a longer arrangement automatically becomes a periodic tenancy under the Residential Tenancies and Rooming Accommodation Act. They also note that a seller renting back beyond six months can cost the buyer their home transfer duty concession, a QLD-specific detail with real consequences for the buyer that can affect their willingness to agree.

Other states have their own tenancy rules and implications. Always get state-specific legal advice from your solicitor before structuring any rent-back.

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Deposit Bonds

A deposit bond is a guarantee to the seller in place of a cash deposit. Rather than tying up your cash deposit (typically 10% of the purchase price) during the period between exchange and settlement, an insurer guarantees the deposit on your behalf. Canstar describes them as generally covering up to about 10% of the purchase price, issued by insurance companies.

Deposit bonds do not extend your settlement timeline, but they preserve your cash liquidity during the period. For settlements under six months, Deposit Power describes the cost as starting from as little as 1.3% of the deposit amount, while Deposit Assure puts it at 1.5%. Issuers are backed by insurers including QBE and HDI Global Specialty.

A deposit bond is not a solution to the buy-sell timing problem on its own (it does not fund the purchase or eliminate bridging), but it can be a useful tool when liquidity is tight during the period between exchange and settlement.

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A Decision Framework

The right approach depends on your personal circumstances. The table below summarises the main strategies across three dimensions: certainty of funds, flexibility on timing, and cost or complexity.

Strategy	Certainty of Funds	Timing Flexibility	Key Risk
Sell first, buy later	High (proceeds confirmed)	Low (gap period to manage)	Temporary accommodation; motivated-buyer perception
Bridging loan	Medium (funds available; peak debt)	High (buy before selling)	Interest on peak debt; 12-month deadline pressure
Simultaneous settlement	High (no bridging gap)	Low (both dates must align)	Single-point failure; any delay affects both
Loan portability	High (existing loan transfers)	Low (requires aligned dates)	Lender and loan type must support it
Subject-to-sale offer	Medium (conditional on sale)	Medium (sell while under contract)	48-hour clause; weaker negotiating position
Rent-back	High (sale proceeds secured)	Medium (temporary buffer only)	Tenancy obligations; state-specific rules
Deposit bond	No direct funding	High (cash preserved to exchange)	Does not fund settlement; cost of guarantee

None of these strategies is inherently superior. Talk through your position with a mortgage broker before committing to any approach. The selling channel quiz can also help you think through your sale options.

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Where AgentBridge Fits

If you are selling under time pressure (a bridging deadline, a simultaneous settlement target or simply wanting to move on quickly), the speed of your sale matters.

AgentBridge distributes your property simultaneously to a network of 80+ buyers agents across Australia on day one. Buyers agents act for qualified, pre-briefed buyers, so the property reaches active purchasers immediately rather than waiting for passive enquiry to build. That structural reach can compress the discovery phase of a sale, though no distribution service can guarantee a timeline.

For sellers where a tenanted investment property is involved, a buyers agent network also reaches investor buyers directly, meaning you are not limited to an owner-occupier buyer who needs the property vacant. See selling to investors through a buyers agent network for more on that path.

AgentBridge charges a transparent distribution fee, roughly 30 to 40% below a traditional agent's commission, with no obligation to list publicly if that does not suit your situation. If you are working through the timing of a simultaneous sale and purchase and want to understand how distribution works, get in touch.

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General information only, not financial, legal or taxation advice and not credit assistance. Speak to your own broker, accountant or solicitor before acting on anything here.