Gazumping Explained and How to Avoid It

Gazumping is one of the more frustrating experiences a buyer can face during a property purchase. You reach an agreement with a seller, sometimes even in writing, only to find they have accepted a higher offer from someone else before contracts are formally exchanged. In most Australian states this is not illegal, which is exactly why it catches so many buyers off guard. Understanding how gazumping happens, why the law allows it, and what you can do to protect your position is the best defence against losing a property you thought you had already secured.

What Gazumping Actually Means

Gazumping occurs in the gap between agreeing on a price with a seller and the point at which a contract becomes legally binding, which in most private treaty sales is when contracts are exchanged. Until that moment, neither party is obligated to proceed, no matter how firm a verbal agreement or a signed offer and acceptance form might feel. A seller who receives a better offer during this window is generally free to accept it, even if they have already told you the property is yours, because nothing in the transaction has become enforceable yet.

Why It Happens

Real estate agents owe a duty to their vendor client, not to a prospective buyer, and that duty generally includes passing on every offer received, even after one has been verbally accepted. In a rising market, or where a property attracts strong interest, a seller weighing up an existing agreement against a materially better offer will often be tempted to renegotiate or switch buyers altogether. The longer the gap between agreeing on a price and exchanging contracts, the more opportunity there is for another offer to arrive and change the seller's thinking.

Which States Are More Exposed

In New South Wales and Victoria, exchange of contracts is the moment a private treaty sale becomes binding, and the period beforehand, while a contract review is underway, is when gazumping risk is highest. Queensland's standard contract process works in a similar way, and cooling-off rules in these states offer no protection here, since cooling-off periods protect buyers after exchange, not sellers or buyers before it. Properties sold at auction are the exception, since a successful bid creates an immediately binding contract with no gap for a better offer to intervene, which is one reason some buyers in competitive markets prefer that method of sale.

Western Australia and South Australia operate through licensed settlement agents and conveyancers rather than solicitors handling every transaction, but the same underlying principle applies: nothing is binding until contracts are signed and exchanged, so a seller in either state retains the same freedom to accept a better offer beforehand. It is worth noting that gazumping has a mirror image, sometimes called gazundering, where a buyer lowers their offer or introduces new demands shortly before exchange, once they sense the seller is emotionally committed to the sale. Both practices exploit the same gap in the process, and both are best countered by moving through that gap as quickly as possible.

Protecting Your Position Before You Make an Offer

The best defence against gazumping is speed, and speed depends on preparation done well before you find the property you want. Have your finance pre-approved rather than merely estimated, so you are not waiting on a lender once a price is agreed. Engage a conveyancer early and ask them to review the contract of sale as soon as it is available from the agent, ideally before you make a formal offer, so there is nothing left to check once you have a verbal yes. MoneySmart's guidance on buying a house is a useful starting point for getting your finances and paperwork in order before you start making offers.

What to Do Once Your Offer Is Accepted

Once a seller agrees to your offer, the priority shifts to exchanging contracts as quickly as possible. Ask your conveyancer to turn around their review within a day or two if they have not already seen the contract, and be ready to sign and return your copy the moment it is prepared. Some buyers offer a slightly larger holding deposit or agree to a shorter cooling-off period as a signal of commitment, though these gestures carry no legal weight in preventing a seller from dealing with someone else beforehand. Keeping communication professional and documented through your conveyancer and the agent, rather than relying on informal verbal assurances, at least creates a clear record of what was agreed and when.

If You Are Gazumped

If a seller does accept another offer after agreeing to sell to you, your legal options are limited because no binding contract existed. Costs already spent on a building inspection or contract review are usually not recoverable, which is a frustrating but common outcome. Some buyers choose to make a revised offer to try to win the property back, particularly if they believe the seller would prefer to deal with a known, ready buyer rather than start again. Others treat it as a lesson in readiness and move on to the next property with their finance and conveyancer already in place, which puts them in a much stronger position the second time around.

How a Conveyancer Reduces the Risk

A conveyancer who is briefed early can shave days off the gap between agreement and exchange, which is precisely the window gazumping relies on. They can request the contract in advance, flag any unusual special conditions before they become a sticking point in negotiations, and coordinate with your lender so finance is not the reason exchange is delayed. For a standard residential purchase, this kind of preparation costs nothing extra and can be the difference between securing a property and starting your search over. If you are actively looking and want to be ready to move the moment you find the right home, engaging a conveyancer now means there is one less delay working against you.