Buying a property at auction
This guide walks you through every stage of the auction process, from pre-auction preparation to settlement, helping you approach auction day with confidence and control. For the complete buying process, read our pre-approval to home ownership guide. To compare all purchase methods, see our how to buy the right property guide.
Quick summary: At auction, all bids are unconditional, there is no cooling-off period, and the winning bidder pays a 10% deposit immediately and signs the contract on the spot. Securing pre-approval before auction is essential. Complete all inspections, legal reviews, and due diligence before the auction, not after. Set a firm maximum bid and do not exceed it. Settlement is typically 42 days from auction day.
How property auctions work
A property auction is a public event where buyers compete through open bidding. All bids are transparent, and auctions typically last 15 to 30 minutes. When the hammer falls, the highest bid wins and the buyer is legally committed. The winning bidder pays a 10% deposit immediately and signs the contract on the spot. There is no cooling-off period and all bids must be unconditional, meaning you cannot include conditions for finance approval, inspections, or any other contingency.
The reserve price is the seller's minimum acceptable price, usually kept confidential until bidding reaches it. If bidding does not reach the reserve, the property is "passed in" and the highest bidder gets the first opportunity to negotiate with the seller.
Auctions versus private treaty
Auctions require quick decisions and immediate commitment, while private treaty allows extended negotiation. Auctions show a price guide range, while private treaty lists a set asking price. Auction bids must be unconditional, while private treaty allows conditional offers (subject to finance, inspections). The deposit is due immediately at auction (10%), while private treaty often allows staged payments starting with 0.25%. There is no cooling-off at auction, while private treaty includes a 5-business-day cooling-off period in NSW. Both typically settle within 42 days. Buying off the plan is another alternative with its own unique process and timeline.
Advantages and disadvantages
Auction bidding is fully transparent, with all offers visible in real-time. The process is quick, with a binding sale on the day. Once the hammer falls, the sale is secure and legally binding with no risk of gazumping. Motivated sellers use auctions, giving you confidence they are committed. And if competition is limited, you may purchase below market value.
However, the high-pressure environment can lead to emotional bidding and overspending. Once you win, you cannot back out. You need immediate access to your 10% deposit. Upfront costs for inspections and legal reviews are incurred with no guarantee of success. Prices can escalate quickly in competitive auctions. And the secret reserve price means you may not know the seller's minimum until bidding reaches it.
Key consideration: Before committing to an auction purchase, ensure you have worked with a broker who understands your borrowing capacity and can provide honest advice about whether an auction aligns with your financial situation. Read the benefits and risks of low-deposit purchases if you are using a government scheme.
Pre-auction preparation
Financial readiness
Secure strong pre-approval before the auction. This demonstrates you are a serious buyer ready to move quickly. Ensure your 10% deposit is accessible and ready to transfer immediately via bank cheque or electronic transfer. Set your absolute maximum bid amount with a buffer for competitive bidding. Budget for stamp duty, legal fees, building insurance, and settlement costs. Confirm you can meet settlement requirements within 42 days. Use our property deposit calculator and mortgage repayment calculator to model your numbers.
Understanding your LVR helps you know what you can afford to bid. If your LVR is above 80%, you may need LMI, unless you qualify for the Home Guarantee Scheme (5% deposit, no LMI) or the Help to Buy Scheme (2% deposit, government equity). Ensure your genuine savings meet lender requirements. The FHSSS can help you build your deposit faster, and the First Home Owner Grant adds $10,000 for new properties.
Legal due diligence and inspections
Because auction bids are unconditional, all inspections and legal reviews must be completed before auction day. Have a solicitor or conveyancer review the contract of sale to identify issues or unfavourable terms. Check the property's title, verify ownership, and look for encumbrances or restrictions. For apartments or townhouses, examine strata records for financial health and maintenance concerns. Confirm zoning, easements, and covenants that may limit use or development.
Hire a qualified building inspector to assess structural integrity, roof condition, and overall soundness. Arrange a pest inspection covering termites. Have electrical and plumbing systems checked. Research the location, condition, and neighbourhood thoroughly, including recent comparable sales. Our property purchase and valuation guide explains how bank valuations work and what to expect. Whether the property is a freestanding house, strata property, or land, the inspection approach differs.
Developing your auction strategy
A well-prepared strategy helps you maintain control during a fast-paced auction. Decide in advance whether you will open the bidding or wait. Plan your bidding increments for each stage to avoid emotional overspending. Set your absolute maximum bid as a non-negotiable ceiling no matter how intense competition becomes. Develop methods to project confidence and appear calm. Decide if you will bid personally or use a buyer's agent. If bidding with a partner, establish clear communication signals. And prepare for the possibility of underbidding and negotiating post-auction if the property passes in.
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Auction day
Arrive early to complete registration without rushing. Bring valid photo ID and you will receive a bidder number. If bidding as a couple, discuss in advance how you will manage bids and communicate. Registration is mandatory in all Australian states.
Before bidding begins, observe the crowd size and number of active bidders. Identify who looks prepared and serious versus those just watching. Note how agents interact with attendees for clues about competition. Understanding the auctioneer's style helps you anticipate the auction's pace and flow.
When bidding, act decisively with clear, firm signals. Choose when to bid in small or large increments based on competition. Use strategic pauses to unsettle competitors. Respond quickly to competing bids to show momentum. Stay focused on every aspect of the auction, from auctioneer cues to competitor body language. Maintain a confident demeanour and choose a position where you can see and hear clearly.
Be aware that auctioneers use tactics to drive prices higher. Vendor bids (placed on behalf of the seller and clearly announced) encourage bidding and move the price toward reserve. Vendor bids can only reach the reserve price, not above it. Auctioneers use urgency language and direct attention to specific bidders. If bidding does not reach reserve, the property passes in and post-auction negotiation begins.
After the hammer falls
Winning the auction
If you are the successful bidder, several immediate actions are required. Pay your 10% deposit via bank cheque or electronic transfer. Sign the contract of sale on the spot and verify your name is correctly listed. Exchange contact details with the selling agent and confirm the settlement period (typically 42 days). Arrange building insurance immediately. Inform your conveyancer that you have won. Your broker then moves to finalise your mortgage and secure unconditional approval. Our settlement guide covers the remaining steps to completion.
Property passed in
If the property does not meet its reserve and is passed in, opportunities remain. As the highest bidder, you get the first chance to negotiate with the seller. The seller may reveal their reserve price, allowing you to adjust your offer. Post-auction negotiations offer more flexibility than auction bidding, as you can negotiate on terms, deposits, and settlement timeframes. Many successful purchases happen through post-auction negotiation, sometimes at lower prices than active bidding would have achieved.
Underbidder and pre-auction opportunities
Being the second-highest bidder is not the end. The agent may contact you if the winning bid falls through. Continue searching while you wait. Sometimes properties are withdrawn from auction or sold beforehand, and making a pre-auction offer can secure the property without competitive bidding stress. Pre-auction purchases may allow finance conditions, unlike auction purchases.
Frequently asked questions
How much deposit do I need on auction day?
The standard requirement is 10% of the purchase price, paid immediately after the hammer falls via bank cheque or electronic transfer. The deposit is held in the agent's trust account until settlement. The remaining 90% is due at settlement, usually within 42 days. Having your deposit funds ready is critical, as failure to provide the deposit can result in the property being re-offered.
What happens if I cannot get finance after winning?
Winning at auction is legally binding regardless of financing. If you cannot complete the purchase, you risk forfeiting your deposit, being liable for any shortfall if the property is resold at a lower price, legal action from the seller, and damage to your credit rating. This is why securing strong pre-approval before auction day is essential.
Can I make my auction bid subject to conditions?
No. All auction bids must be unconditional. You cannot include finance clauses, inspection conditions, or any other contingencies. The statutory cooling-off period does not apply to auction purchases. This is why all due diligence, inspections, and legal reviews must be completed before auction day. If you need conditional purchasing, private treaty is the better approach.
What is a vendor bid and how does it work?
A vendor bid is a bid made by the auctioneer on behalf of the seller to start or maintain bidding momentum. It must be clearly announced as a vendor bid. Vendor bids can only reach the reserve price, not above it, and are generally limited to one or two throughout the auction. Understanding vendor bids helps you assess true competition levels and avoid being misled about the number of genuine bidders.
What is a reserve price?
The reserve is the minimum price the seller will accept. It is usually not disclosed before or during the auction and is set by the seller and agent beforehand. If bidding does not meet the reserve, the property is passed in. The reserve may be adjusted during the auction if bidding is strong but has not quite reached it. After a passed-in auction, the reserve becomes the starting point for negotiations with the highest bidder.
Should I bid first or wait?
There is no single best approach. Opening the bidding sets the tone and can influence the auction's direction. Waiting lets you observe competition levels before committing. Your approach should depend on the number of registered bidders, how competitive the auction is likely to be, your overall strategy, and what you observe in the room. Attending auctions as an observer before you are ready to buy builds valuable experience.
How do I avoid emotional bidding?
Set your absolute maximum bid before entering the auction and commit to not exceeding it under any circumstances. Bring a trusted friend or family member to keep you grounded. Consider using a buyer's agent to bid on your behalf and maintain objectivity. Use breathing exercises to manage pressure. Stick to your pre-planned strategy rather than reacting emotionally. Remember that there will always be other properties if this one goes beyond your budget.
What happens if the property is passed in?
The highest bidder gets the first chance to negotiate directly with the seller. The seller may reveal their reserve price during negotiations. You can discuss price, contract terms, and settlement timing with more flexibility than during the auction itself. Many buyers successfully purchase properties through post-auction negotiations, sometimes at prices lower than active bidding would have achieved.
What finance options are available for auction purchases?
Secure pre-approval before auction day so you can move to unconditional approval quickly after winning. The Home Guarantee Scheme allows 5% deposit with no LMI, and the Help to Buy Scheme allows 2% deposit. Understanding your LVR and loan options before the auction ensures you know exactly what you can bid. Our home equity calculator helps model different scenarios.
Take the next step
Success at auction comes from thorough preparation. Secure pre-approval, complete all inspections and legal reviews before the day, set your maximum bid, and attend auctions as an observer first to build experience. Explore all pathways to home ownership to ensure auction is the right approach for your situation. Our construction guide covers land auctions specifically.
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Related resources for first home buyers
Continue building your knowledge with our private treaty guide for the alternative purchase method, our off-the-plan guide for pre-construction purchases, our settlement guide for the final stages, our pre-approval guide to ensure your finance is ready, and our first home buyers journey for the complete step-by-step process.
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