William Gang Wang · Herald Legal · Updated 29 October 2026
1. What is a Section 66W Certificate?
Section 66W of the Conveyancing Act 1919 (NSW) sets out requirements for the certificate. A qualifying certificate provided by the purchaser through a solicitor or licensed conveyancer confirms that the required explanation has been given and generally removes the statutory cooling-off period for the residential contract. The implications should be understood before exchange.
2. How long is the ordinary cooling-off period?
Most private treaty residential property contracts in NSW have a five-business-day cooling-off period. Qualifying off-the-plan residential contracts generally have a ten-business-day period. Statutory exceptions, contractual terms and the exact start and end times must be checked. Auction purchases and contracts exchanged on the day a property is passed in at auction generally have no cooling-off period.
3. What does withdrawal during the cooling-off period cost?
A purchaser who validly rescinds during an applicable statutory cooling-off period generally forfeits 0.25% of the purchase price to the vendor. For a $1 million property, that is $2,500. A compliant written rescission notice must be served within the applicable period. This does not mean a buyer can withdraw at any later time simply by paying 0.25%.
4. Can a buyer simply change their mind after giving a 66W certificate?
Generally, the buyer cannot rely on the waived statutory cooling-off right. Failing to complete because finance was refused, an inspection was unsatisfactory or the buyer changed their mind may amount to breach, with risks including loss of deposit, damages or other contractual remedies. The particular contract may contain protective special conditions.
5. Does Section 66W eliminate every other termination right?
No. An express contractual termination condition, substantial breach by the other party, an applicable statutory rescission right, misleading conduct or another legally available ground may require separate analysis. Whether a right exists, how notice must be given and the financial consequences must be assessed carefully.
6. What checks should be completed before exchange?
Where possible, obtain contract advice, title and planning searches, building and pest inspections, finance approval, strata records and confirmation of settlement date, deposit, special conditions and adjustment provisions before providing a 66W certificate. Off-the-plan, option and other complex transactions may have additional statutory requirements.
7. What changed in the NSW contract forms in 2026?
The NSW Registrar General notes changes to the prescribed cooling-off notice commencing in August 2025, with transitional arrangements ending so that contracts exchanged from 1 June 2026 must include the updated prescribed notice. Practitioners should use the appropriate current contract documents rather than relying on an outdated template.
Related reading
Legal sources
This original article draws on the following authoritative sources:
Need advice on your circumstances?
Herald Legal · William Gang Wang · Suite 706, 368 Sussex Street, Sydney NSW 2000.
Disclaimer: This article provides general legal information only, not advice on individual circumstances. Applicable law and deadlines must be checked against current law and the facts. Reading this article or contacting the firm does not automatically create a solicitor–client relationship.