You found the house. You made an offer. The agent rang and said the vendor accepted, congratulations. You told your parents. You started mentally arranging furniture.
Then, four days later, the same agent rings back and explains that someone else has come in higher, and the vendor has gone with them. Your building inspection is already paid for. Your conveyancer has already read the contract. None of that money is coming back.
That is gazumping, and the first thing to understand is that nobody has done anything illegal. No Australian state or territory makes gazumping a separate offence. The Northern Territory Government puts it about as plainly as a government ever puts anything: "Gazumping is not illegal as the seller did not sign a contract with you."
What actually changes at every state border is not whether gazumping is allowed. It is how long you stay exposed, because that depends entirely on the moment a sale becomes legally binding in your state. There are really two models. In New South Wales, the ACT and the Northern Territory a sale is not binding until contracts are physically exchanged, which is a separate step on top of both signatures. In Victoria, Queensland, Western Australia, South Australia and Tasmania the contract forms once both parties have signed, and there is nothing to exchange.
Here is where you can be gazumped in Australia, why, and what actually shortens the window.
Where you can be gazumped in Australia
Read this table as a measure of exposure, not legality. In every row the answer to "can this happen to me" is yes. What differs is how long "before you are safe" lasts.
| State | Gazumped? | Your risk ends when | The mechanic | Cooling-off once bound |
|---|---|---|---|---|
| NSW | Yes | Contracts are exchanged | Both sides sign, then physically swap contracts. The extra step lengthens the window. | 5 business days, forfeit 0.25% |
| VIC | Yes | The vendor counter-signs | You sign the contract as your offer. No separate exchange step. | 3 clear business days, forfeit the greater of $100 or 0.2% |
| QLD | Yes | The seller signs | Your signature is the offer. The seller rejects it simply by not signing. | 5 business days, termination penalty of 0.25% |
| WA | Yes, but briefly | The seller signs the O&A | Acceptance forms the contract, with no disclosure pack to prepare first. | None |
| SA | Yes | The contract is signed | Your offer binds nobody until then, and the vendor need not come back to you. | 2 clear business days, up to $100 |
| TAS | Yes | Both parties sign | Standard Law Society and REIT contract, with limited exits once signed. | None by statute. An opt-in clause exists, off by default |
| ACT | Yes | Contracts are exchanged | Exchange, as in NSW, but the seller must have the full contract pack ready before advertising. | 5 working days, forfeit 0.25% |
| NT | Yes | Signed copies are exchanged | An offer is not binding until the contract is signed and exchanged. | 4 working days, but conditional. See the NT section. |
If you want the cooling-off column in full, including the auction traps in each state, we have a separate guide to cooling-off periods by state. Cooling-off matters here for one reason only: it is what you get after the gazumping risk has ended, not protection against it.
The single best defence is being ready to sign before anyone else is.
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NSW, New South Wales
Exposed until: contracts are exchanged. This is the longest kind of gazumping window in Australia, shared with the ACT and the NT, and NSW Fair Trading is unusually direct about it.
A NSW sale "is binding on the seller and buyer when contracts are exchanged between the 2 parties", and exchange means three separate things happening: the seller signs their copy, you sign yours, and the two are swapped. Until that swap, the vendor "is not generally compelled to sell to any specific person and can change their mind at any time before the exchange of contracts".
The part most buyers get wrong is the holding deposit. In NSW it is officially called an expression of interest deposit, and Fair Trading is blunt about what it buys you: "This won't mean that the property is yours or that it gets taken off the market." Worse, and this is the line worth reading twice, "The seller or agent can take as many preliminary deposits as they like for the one property." Your deposit does not reserve anything, and the seller may still negotiate with others "even if you have made an expression of interest payment".
It is refundable, at least. If someone else contracts on the property, "you are entitled to a full refund of your deposit" and "the agent must refund the expression of interest deposit within 14 days". There is no legal cap on the amount, because the Property and Stock Agents Regulation 2022 imposes disclosure and refund duties without prescribing any figure.
What you cannot recover is everything else. Fair Trading again: if you are gazumped, "neither the agent nor the seller is obliged to compensate you for any money you may have spent on: legal advice, inspection reports, finance application costs or inquiries".
The agent's duty, and its loophole. The agent must pass every offer to the vendor right up to exchange. But the regulation carries a carve-out that almost no article mentions: the duty applies "unless the vendor has provided written instructions to the contrary". Fair Trading gives the example of a vendor instructing the agent not to pass on offers under a certain price. The agent must also tell you if other offers arrive, though "you may wish to ask for evidence in writing that the agent has passed on your offer, but this is not required of an agent by law".
Then there is the section 66W certificate. This is the standard anti-gazumping move in NSW, and it is a genuine trade-off rather than a free win. A 66W certificate waives your cooling-off period entirely.
It is worth being precise about what that achieves, because the usual description of it gets the logic backwards. You do not need a 66W to exchange contracts, and exchanging with your cooling-off period intact already ends the gazumping risk, because both sides are bound the moment the contracts are swapped. What the certificate actually does is remove the vendor's reason to refuse. Plenty of vendors, and most of them in the days around an auction, will not exchange with a buyer who keeps a 5 business day walk-away right, and the 66W buys their agreement by handing that right over.
Under the Conveyancing Act 1919 it must be in writing and signed by a solicitor or barrister who is not acting for the vendor. The Act draws that line wider than most people expect: it cannot be signed by the vendor's solicitor, nor by any solicitor employed in that solicitor's legal practice, nor by any solicitor who is a member or employee of the same firm. It must also state that they explained to you "the effect of the contract, the nature of the certificate and the effect of giving the certificate to the vendor".
One useful detail that is widely reported incorrectly: a licensed conveyancer can sign a 66W. Section 66W on its own reads as though only lawyers qualify, but the definitions section of the same Division says "solicitor" has its Legal Profession Uniform Law meaning "and includes a licensed conveyancer". So you do not necessarily need to engage a solicitor purely to get one signed.
The honest cost of a 66W is this. Hand it over and you are bound the second you exchange, with no five days to arrange your building inspection, no five days for your conveyancer to finish the contract review, and no 0.25% escape hatch. It only makes sense if your inspection is already done and your finance is unconditionally approved. If it is not, you have swapped one risk for a bigger one.
VIC, Victoria
Exposed until: the vendor counter-signs. Victoria has no separate exchange step, which shortens the window compared with NSW.
In Victoria you make your offer by signing the contract of sale itself, and "the property is sold when both you and the seller have signed the contract of sale". Until the vendor's signature lands, nothing binds. Consumer Affairs Victoria states the exposure plainly: "A seller with several offers may decide to accept another offer without giving you the opportunity to increase your offer." Verbal acceptance is worth nothing, since "only written offers can lead to a binding contract of sale".
Victoria has one structural feature that quietly works in a buyer's favour. Under the Sale of Land Act 1962 the vendor "must give to a purchaser, before the purchaser signs the contract, a statement signed by the vendor", the section 32 vendor's statement. A vendor cannot lawfully take your signature before serving it. That is not an anti-gazumping rule and no regulator describes it as one, but the practical effect is real: a vendor whose section 32 is not ready cannot convert anyone's offer into a signed contract, including a rival's.
Once you are bound, Victorian cooling-off is 3 clear business days counted from the day you signed, not the day the vendor signed, and the forfeit is "the sum of $100 or 0.2 per centum of the purchase price (whichever is the greater)".
QLD, Queensland
Exposed until: the seller signs. In Queensland your signature is the offer, and the seller's is acceptance.
The Queensland Government sets out the sequence exactly: a buyer "first has to make an offer. They do this by signing the sale contract", and the seller can "accept the offer by signing the contract" or "reject the offer by not signing the contract". The contract "becomes binding once you and the buyer have both signed it". On deposits, the buyer-facing guidance is refreshingly unambiguous: paying one "doesn't guarantee the property will be yours", because the seller can still choose to reject your offer.
What changed on 1 August 2025. Queensland's seller disclosure scheme commenced under the Property Law Act 2023, and it inserts a real step ahead of contract formation. Section 99 requires that "before a contract for the sale of a lot is signed by the buyer, the seller must give the buyer" a disclosure statement in the approved form plus every prescribed certificate. At auction the seller must still provide them "before the fall of the hammer".
Again, this is not an anti-gazumping law and nobody frames it as one. But a Queensland seller now has to assemble and serve a document pack before they can lawfully take anyone's signature, which means an unprepared seller cannot flip to a rival buyer quickly either.
The scheme also gives you a genuine exit that survives long after cooling-off ends. If the seller failed to hand over the pack before you signed, or what they handed over was "inaccurate or incomplete in relation to a material matter" that would have stopped you signing, you may terminate, and that notice "may be given at any time before settlement".
Queensland's statutory cooling-off is 5 business days starting the day you receive a copy of the contract signed by both parties, and the termination penalty is "an amount equal to 0.25% of the purchase price", with the rest of the deposit refunded within 14 days.
WA, Western Australia
Exposed until: the seller signs the Offer and Acceptance. This is the tightest window in Australia in practice, and it is the reason people say gazumping "does not happen" in WA.
It is worth being precise here, because the popular version overstates it. WA sells by Offer and Acceptance, and "if the seller decides to accept your offer, they will need to sign the O & A. The signed O & A becomes a binding contract of sale". There is no separate exchange to wait for and no cooling-off period afterwards, so the gap between "yes" and "bound" is close to zero.
The reason WA is tighter than Victoria or Queensland, which also bind on signature, is what is not required. "In WA, there is no mandatory seller disclosure statement." A Victorian vendor has to serve a section 32 first and a Queensland vendor has to serve a Form 2 first, and neither can lawfully take a signature until they have. A WA seller has nothing to assemble, so they can sign on the spot. That is also precisely why a rival buyer can be accepted on the spot.
But WA is not gazumping-proof, and you should know the two ways it can still reach you.
- Before the seller signs, order counts for nothing. WA Consumer Protection states it directly: "The seller is free to accept or decline all offers, regardless of the order in which they were received." Your offer sitting there first buys you no priority.
- The 48-hour clause can displace you after you are bound. This one is widely misdescribed. It is not a general gazumping tool. It is a special condition used where your contract "is conditional upon sale of the buyer's existing property". If the seller then wants to accept a new offer, "the original buyer has 48 hours to make their offer unconditional, otherwise the contract is terminated". You are not powerless: "The seller cannot accept the new offer if the original buyer agrees to make the current contract unconditional." Consumer Protection also notes it is "not a strict 48-hour time limit but the equivalent of two business days".
WA has no mandatory cooling-off period and no mandatory seller disclosure statement, so the conditions you write into the O&A are the only protection you get. That cuts both ways: a clean, unconditional offer closes the window fastest, and also removes every exit you might want later.
SA, South Australia
Exposed until: the contract is signed. South Australia's guidance is among the clearest in the country on both points that matter.
"Your offer is not binding until a sale contract is signed", and, on the gazumping question specifically, "the vendor may accept another offer without giving you a chance to increase your offer".
South Australia then does something no other state does. Its cooling-off forfeit is not a percentage at all. Under the Land and Business (Sale and Conveyancing) Act 1994 the money you paid comes back except for a deposit that "does not exceed $100". Buyers who have read about the 0.25% elsewhere routinely assume it applies nationally. In SA it does not, and the practical deposit at offer stage is small: "The agent can ask you for a deposit ($100 maximum) when you make an offer."
Cooling-off runs 2 clear business days from the later of signing the contract or receiving the Form 1 vendor's statement. SA agents commonly provide the Form 1 soon after signing, and the reason the state gives is simply that "the contract doesn't become legally binding until the cooling-off period has expired". Note what the "later of" rule does for you: a Form 1 served after you signed pushes the start of your cooling-off period out to the day you received it, so late service extends your window rather than cutting it short.
TAS, Tasmania
Exposed until: both parties sign the standard contract. Tasmania is the state where being gazumped hurts most on the way in and the way out.
Tasmania uses a standard form contract published by the Tasmanian Law Society and the Real Estate Institute of Tasmania, and the regulator, Consumer, Building and Occupational Services, warns that "standard sale contracts contain limited 'get out' clauses" and that "'buyer beware' is the position you should take".
There is a claim about Tasmania circulating on comparison sites that is worth correcting. You will read that Tasmania has a 3-day cooling-off period. There is no statutory cooling-off period in Tasmania: CBOS confirms that "'cooling-off' periods for residential property sales are not a requirement under the Property Agents and Land Transactions Act 2016", and that vendor disclosure and cooling off "were added as an option for purchasers and vendors to use". The current standard form carries a 3 business day cooling-off provision that "either applies or does not apply", and, critically, "if no selection is made, the cooling off provision does not apply".
That is genuinely useful to a Tasmanian buyer, because it means you can ask for the box to be ticked. Most people never learn it exists.
ACT, Australian Capital Territory
Exposed until: contracts are exchanged. The ACT runs an exchange model like NSW, but with one big difference in what it costs you.
Access Canberra's own buyer and seller guide names gazumping directly and describes it as happening "when a seller and buyer verbally agree on a price" and then, "before the buyer can exchange a contract", the seller accepts a higher price from someone else. Your offer "is not legally binding until the exchange of contracts".
Here is what makes the ACT different. Under the Civil Law (Sale of Residential Property) Act 2003, an ACT seller "commits an offence if all the required documents are not available for inspection by a prospective buyer" whenever an offer can be made, and it is a strict liability offence. Those required documents include the Crown lease, the title extract, an energy efficiency rating statement, and, for most homes, "a building and compliance inspection report" and a pest inspection report, each from an inspection carried out no earlier than 3 months before the property was first advertised.
In other words the seller pays for the building and pest reports up front, and the buyer reimburses them at completion. So a gazumped ACT buyer has usually not sunk inspection money the way a gazumped NSW buyer has. It does not stop the gazumping, but it makes it a much cheaper loss.
Two ACT-specific traps if you do get to contract. Cooling-off is 5 working days with a 0.25% forfeit, and it disappears entirely if the buyer is a corporation or the property is sold by tender, neither of which has a NSW equivalent. And where NSW accepts a licensed conveyancer's certificate to waive cooling-off, the ACT requires a lawyer.
NT, Northern Territory
Exposed until: signed copies are exchanged. The Northern Territory is the only jurisdiction with a dedicated government page on gazumping, and it is worth quoting.
"Gazumping is not illegal as the seller did not sign a contract with you." "You can be gazumped up until the time the contracts are signed and exchanged." If you paid a deposit, "it must be refunded in full", but "you will still have to pay costs for services you may have already done to buy the property".
The NT cooling-off position needs a caveat that most comparison pages miss. The nt.gov.au guidance says non-auction contracts must give the buyer 4 business days. The approved Contract of Sale itself, however, makes the right conditional and counts it differently: clause 30 applies only where the contract "comes into force without the Buyer's conveyancer being involved in the exchange of signed counterpart copies", and it gives 4 working days. Read literally, if your conveyancer handles the exchange, clause 30 gives you nothing. The two sources genuinely conflict, and the government page has not been updated since 2019. Do not assume you have 4 days in the NT. Ask your NT conveyancer to confirm what your particular contract does.
What being gazumped actually costs you
The deposit comes back. Everything else does not. That is the consistent position across every jurisdiction that addresses it, from NSW Fair Trading ("neither the agent nor the seller is obliged to compensate you") to the Northern Territory ("you will still have to pay costs for services you may have already done").
The bill is usually made up of three things:
- Building and pest inspection. Around $450 to $900 combined in 2026, and it is the one you almost always lose, because you order it on the property you thought you had won. Booking through a licensed inspector in advance at least means you are not also paying a rush premium.
- Contract review. Full conveyancing runs $1,500 to $2,500 all up for a typical 2026 purchase, and while you will not owe the whole fee for a purchase that never happened, most conveyancers charge for the contract review work already done.
- Searches and reports. Strata reports, council certificates and any additional searches your conveyancer ordered.
The ACT is the standout exception, because the seller supplies the building and pest reports there, so the largest single line in that list usually does not apply.
How to actually stop it: the defences that work
You cannot make gazumping illegal, and no clever clause forces a vendor to sell to you. What you can do is compress the window between "yes" and "binding" so hard that there is no time for a rival to move. Every real defence is a version of that.
Line up your conveyancer before you offer, not after
This is the highest-leverage thing on the list and the one most first home buyers get wrong. If you contact a conveyancer for the first time after the vendor accepts your offer, you have just added days to your own exposure while they onboard you, request the contract and start reading. Choose your conveyancer or solicitor before you start making offers, so the day the agent says yes, you can send the contract straight across for review. If you are not sure which of the two your purchase needs, this is the state-by-state breakdown. NSW Fair Trading's own advice is to "get a copy of the sale contract as soon as possible" and to "seek to exchange contracts with the vendor as soon as possible".
It is also the conversation where co-buyers settle how their names go on the title, which is easier to get right before exchange than to change afterwards. See joint tenants vs tenants in common.
Have pre-approval done, not started
A vendor choosing between two similar offers will take the one less likely to fall over. More importantly, finance is the usual reason exchange gets delayed, and delay is exactly what gazumping needs. Get home loan pre-approval sorted before you are house hunting seriously, and if you want it moving faster than a single bank's queue allows, a mortgage broker can run it across multiple lenders at once. Fair Trading lists this first among its own protections: "always have your loan finance pre-arranged".
Be able to pay the deposit the same day
Fair Trading's wording is specific for a reason: "ensure you can pay the 10 percent deposit, by bank cheque or a deposit bond so there is no delay before trying to exchange contracts". A transfer that will not clear until Monday is a two-day gazumping window you created yourself.
Understand what your holding deposit does and does not do
It signals you are serious. It does not reserve the property, it does not take it off the market, and in NSW the agent may hold several of them on the same house at once. Treat it as a gesture, never as protection, and check you have been given the required written notice that the vendor is under no obligation to sell before you hand any money over.
Do the homework before you offer, not between offer and exchange
The days you spend on due diligence after your offer is accepted are the days you are exposed. Anything you can move earlier is time removed from the window. Reading the strata report, checking flood and bushfire overlays and doing your suburb research are all things you can do on a property before you have offered on it.
Time your building and pest inspection deliberately
There is a genuine tension here and it is worth naming rather than glossing over. Inspect before your offer is accepted and you may pay for inspections on houses you never buy. Inspect after and you extend the window during which someone can outbid you, unless you are in a state where cooling-off gives you room to do it post-signature. In NSW, Queensland and the ACT the cooling-off period is exactly the space to do it. In WA and Tasmania there is no such space, which is why a building and pest condition written into the contract matters far more in those two states.
Know what a buyer's agent can and cannot do
A buyer's agent can move faster than you can, knows which selling agents in an area tend to shop offers around, and negotiates for a living. What they cannot do is change when a contract becomes binding. No buyer's agent can stop a vendor accepting a higher offer before exchange, and any who implies otherwise is overselling. They shorten the window. They do not close it.
Frequently asked questions
Is gazumping illegal in Australia?
No. No Australian state or territory makes gazumping a separate offence. The Northern Territory Government states it directly: "Gazumping is not illegal as the seller did not sign a contract with you." Regulators govern the conduct around it instead, such as requiring agents to pass on offers, requiring written disclosures before a holding deposit is taken and requiring that deposit to be refunded. None of them prohibit a vendor from accepting a better offer before the contract is binding.
Which states can you be gazumped in?
All of them. The difference is how long you are exposed, and it comes down to two models. In New South Wales, the ACT and the Northern Territory a sale is not binding until contracts are physically exchanged, which adds a step after both signatures and lengthens the window. In Victoria, Queensland, Western Australia, South Australia and Tasmania the contract forms once both parties have signed, with nothing to exchange. Western Australia is the tightest of that second group in practice, because acceptance itself forms the contract and the seller has no disclosure document to prepare first. Western Australia and Tasmania are the two jurisdictions with no mandatory vendor disclosure document at all.
Can I sue if I have been gazumped?
Not for the gazumping itself, because no contract existed to breach. NSW Fair Trading is explicit that if you are gazumped, "neither the agent nor the seller is obliged to compensate you for any money you may have spent on: legal advice, inspection reports, finance application costs or inquiries". Your holding deposit must be returned in full, and in NSW within 14 days, but your inspection and legal costs are yours. If you believe an agent behaved improperly, that is a separate complaint to your state's fair trading or consumer affairs body, not a claim for the property.
Does a holding deposit stop gazumping?
No, and NSW Fair Trading says so twice over. A holding deposit "won't mean that the property is yours or that it gets taken off the market", the seller may still negotiate with other buyers "even if you have made an expression of interest payment", and, most surprisingly, "the seller or agent can take as many preliminary deposits as they like for the one property". It demonstrates you are serious. That is all it does.
Can you be gazumped during the cooling-off period?
No, and this is a common misunderstanding worth clearing up. Once contracts are exchanged or signed by both parties, both sides are bound. The cooling-off period is a right for the buyer to rescind, not a right for the seller to re-sell. If you have exchanged, the gazumping risk is over. Some articles suggest otherwise and they are simply wrong. Our guide to cooling-off periods by state covers what each state gives you once you reach that point.
Can you be gazumped in Western Australia?
Briefly, yes, despite what you may have read. Before the seller signs the Offer and Acceptance you have no protection at all, and WA Consumer Protection confirms "the seller is free to accept or decline all offers, regardless of the order in which they were received". There is also a 48-hour clause, but it is narrower than usually described: it applies where your contract is conditional on selling your own property, and it gives you the chance to make your contract unconditional rather than simply losing the house. What is true is that WA's window is the tightest in Australia in practice, because acceptance itself creates the contract and there is no mandatory disclosure document the seller has to prepare first.
What is a section 66W certificate, and should I sign one?
It is a NSW certificate that waives your cooling-off period. It is not what lets you exchange, since exchanging with your cooling-off intact already ends the gazumping risk. What it does is remove the vendor's reason to refuse, because many vendors, and most of them around an auction, will not exchange with a buyer who keeps a 5 business day walk-away right. Under the Conveyancing Act 1919 it must be signed by a solicitor or barrister who is not acting for the vendor, and the definition of "solicitor" in that Division includes a licensed conveyancer, so your conveyancer can usually sign it. Handing it over costs you both the 5 business days and the 0.25% escape at once, so only sign one when your building inspection is done and your finance is unconditionally approved.
Being gazumped is one of the few parts of buying a home where preparation genuinely decides the outcome. See where making an offer sits on your first home buyer journey, read how the whole buying process differs by state, choose a conveyancer before you start offering rather than after, and check your real number first with our free borrowing power calculator.
