What Is Gazumping and Is It Legal in NSW?

Buying property can be exciting, but it can also come with unexpected setbacks. One of the most stressful situations is gazumping, a situation many buyers only fully understand after it happens to them. If you have made an offer on a property in NSW and are worried about where you stand legally, understanding how gazumping works is an important step. Let’s walk through what gazumping is, whether it is legal in NSW, when a property sale becomes binding, and what you, as a buyer, can do to reduce the risk. 

What Does Gazumping Mean in Property Sales?

Gazumping occurs when a seller accepts a higher offer from another buyer after verbally accepting an earlier offer, but before contracts are exchanged. From the first buyer’s perspective, it often feels like the deal was already done. Inspections may have been booked, legal reviews started, and plans made.

In NSW, however, a verbal acceptance or an agreed price does not create a binding agreement. Until property contracts in NSW are exchanged, the seller is legally free to accept another offer. This gap between offer acceptance and contract exchange is where gazumping occurs, and it is why buyers can feel caught off guard.

Is Gazumping Legal in NSW?

Yes, gazumping is legal in NSW. While it can feel unfair, the law is clear. A property sale is not binding until both parties sign identical contracts and those contracts are formally exchanged.

Real estate agents are also bound by law to act in the seller’s best interests. This includes presenting all offers received prior to exchange, even if a verbal agreement has already been reached with another buyer. An agent cannot refuse to pass on a higher or more favourable offer.

Because of this, gazumping in NSW is not a loophole or unethical workaround. It is a direct result of how property contracts in NSW are structured.

When Does a Property Sale Become Legally Binding?

In NSW, a property transaction becomes legally binding only when contracts are exchanged. Exchange occurs when both the buyer and seller sign the contract, and each party receives a copy signed by the other.

In many private treaty sales, an exchange happens with a cooling-off period. NSW buyers are usually entitled to a cooling-off period of five business days, during which the buyer can withdraw, subject to a penalty. This period starts after the exchange, not before.

The cooling-off period can be waived if the buyer provides a Section 66W certificate. When a valid 66W certificate is attached, the contract becomes unconditional immediately upon exchange.

At auction, the rules are different. Once the hammer falls, the sale is binding straight away, with no cooling-off period. This is why gazumping does not occur at auctions.

How Buyers Can Reduce the Risk of Gazumping

While gazumping cannot be completely eliminated, there are steps buyers can take to reduce the risk when buying property in NSW. Having finance pre-approval in place, deposit funds ready, and purchasing structures confirmed shortens the time between offer acceptance and exchange. Being prepared to act quickly matters. 

Engaging a conveyancer early is also important. Waiting until an offer is accepted can cost valuable days, so a contract review before you sign helps identify and address issues with property settlement in NSW. 

Putting offers in writing, including any conditions and a realistic exchange timeframe, can also work in a buyer’s favour. Sellers are often drawn to certainty and speed, not just price.

Starting due diligence early helps limit delays. Review contracts, strata reports, leases, or inspection reports as soon as they are available so you can move to exchange sooner.

In some cases, buyers may consider a Section 66W certificate. This can make an offer more attractive to a seller by removing the cooling-off period, but it should only be used once finance and inspections are genuinely settled.

How a NSW Conveyancer Can Help Protect You

Conveyancing in NSW involves far more than paperwork. A conveyancer helps manage the critical window between offer acceptance and exchange, where gazumping risk is highest.

By controlling timing and ensuring the contract is properly structured before exchange, NSW conveyancing experts help buyers reduce uncertainty and avoid costly mistakes. They review the contract promptly, identify risks, advise on cooling-off rights, and explain whether a 66W certificate is appropriate. They also coordinate with agents, lenders, and inspectors to keep the process moving without cutting corners.

Frequently Asked Questions

What exactly is gazumping?

It is what happens when a seller takes a better offer from someone else after already saying yes to yours, but before contracts change hands. Buyers on the receiving end usually feel blindsided, and understandably so. By that point you may have paid for a building inspection, had a solicitor start on the contract, and mentally moved in. None of that counts for anything legally. A handshake, a phone call, an agreed figure with the agent, none of it locks the sale down in NSW. That window between acceptance and exchange is precisely where gazumping lives.

Can a seller legally do this?

They can. It feels rough, but the position is settled: no sale is binding until both sides have signed matching contracts and those contracts have been formally exchanged. Agents are caught up in it too. Their legal duty runs to the seller, which obliges them to pass on every offer that comes in before exchange, regardless of any verbal arrangement already reached with another buyer. Declining to relay a stronger offer is not an option available to them. Gazumping is not someone exploiting a gap in the rules. It is the rules working as designed.

At what point is the sale locked in?

Exchange is the moment that matters. Both parties sign, each receives a copy bearing the other's signature, and the deal becomes binding. In most private treaty sales a five business day cooling-off period follows, letting the buyer pull out at a cost, and note that this clock starts after exchange rather than before it. Supplying a Section 66W certificate waives that period and makes the contract unconditional the instant it is exchanged. Auctions run differently. The fall of the hammer binds the sale immediately with no cooling-off, which is why gazumping never happens under auction conditions.

How do I stop it happening to me?

Speed is your best defence, because the shorter the gap to exchange, the less opportunity anyone has to outbid you. Have your finance pre-approved, your deposit accessible, and your ownership structure decided before you make an offer. Bring a conveyancer in early rather than waiting for acceptance, since a contract review before you sign catches problems while there is still time to sort them. Put your offer in writing with the conditions and a realistic exchange date spelled out, as sellers value certainty alongside price. A 66W certificate can sharpen your offer further, but only once finance and inspections are genuinely done.

Take Steps to Protect Your Property Purchase

Gazumping is an unfortunate reality of the NSW property market, but it does not have to derail your plans. If you are in the process of buying property in NSW or want guidance before making an offer, speak with our NSW conveyancing team to discuss how we can support you through your purchase and help protect your interests at every stage of the transaction.

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