Auction day is not the time to learn the rules
An auction is a public, unconditional sale. The highest bidder above the wins, signs the contract immediately, and pays a deposit on the spot. There is no cooling-off period. There are no finance or building inspection conditions. If you bid and win, you are legally bound to complete. This step walks you through the process from registration to the fall of the hammer, so you know exactly what is expected of you and what the legal consequences are the moment you win.
Competitive, time-pressured buying situations drive a large share of that overspend. Understanding the auction process precisely — how bids work, what happens when the hammer falls, and what you are legally committed to — lets you set a hard limit before the emotion kicks in, not after.
The preparation window is your only chance to do due diligence
You typically have two to four weeks between when a property is listed for auction and when it goes under the hammer. This window is your only opportunity to resolve every condition, because at auction you cannot attach any.
This is the fundamental difference between an auction and a private treaty sale. In a private treaty, you can make an offer subject to finance or a building inspection. At auction, you cannot. That shifts the entire workload forward. Before auction day you need to complete:
- Finance approval — You need unconditional approval from your lender, not just pre-approval. Pre-approval is an indication. Unconditional approval means your bank has assessed the specific property and confirmed the loan. If you win at auction and your finance falls through, you lose your deposit and can be sued for the vendor's losses .
- Contract review — Get the contract of sale reviewed by your solicitor or conveyancer before auction day. You cannot renegotiate contract terms after you win.
- Building and pest inspection — Commission your own inspection. Most sellers make the contract of sale available before auction, and it will include a vendor's statement with known information, but it is not a substitute for an independent inspection.
- Strata report (if applicable) — For apartments and units, review the owners corporation or body corporate records for outstanding levies, upcoming special levies, and maintenance issues.
Registration is the gatekeeper to bidding
In every Australian state and territory, you must register to bid before bidding starts. Registration does not commit you to bid — it just gives you the right to bid. You present photo identification (a driver's licence is standard) and give the agent your name and address. The agent records these details in a and you receive a numbered paddle or bidder card, which you hold up when placing a bid .
Registration usually opens on the day, but you can often register in advance. Check with the selling agent — some agents allow you to pre-register during the inspection period so there is one less thing to manage on auction morning.
The bidding runs faster than you think
The auctioneer opens the auction by announcing the conditions of sale and disclosing whether s will be used. Bidding then opens. The auctioneer calls for an opening bid, or they may start with a vendor bid to set the pace. From there, buyers bid in increments — the auctioneer sets the increment, typically in steps of $5,000 to $25,000 depending on the price range.
You place a bid by raising your paddle or calling out. The auctioneer acknowledges it and calls the running total. If no one counters within a few seconds, the auctioneer will warn the room: going once, going twice — and then the hammer falls.
Once bidding passes the reserve price, the property is . The auctioneer usually announces this explicitly. At that point, the highest bidder when the hammer falls wins unconditionally. There is no further negotiation on price.
The moment the hammer falls, you have bought the property
The moment the hammer falls and you are the highest bidder, you are the owner. You must:
- 1Sign the contract of sale immediately — both you and the vendor sign on the day.
- 2Pay the deposit — typically 10% of the purchase price. Payment is usually accepted by personal cheque, bank cheque, or electronic transfer. If you want to pay a 5% deposit instead, you must negotiate this with the agent before auction day .
Settlement — when ownership transfers and you pay the balance — happens on the date agreed in the contract, typically 30 to 90 days later.
When the property passes in, the game shifts to negotiation
A property is when bidding does not reach the reserve price. This happens frequently — in some markets, around a third of auctions pass in. When a property passes in, the highest bidder gets the first right to negotiate privately with the vendor . The agent will invite you inside to begin negotiations. You are under no obligation to reach a deal — and the vendor is under no obligation to accept your offer.
In most states, if you reach a sale agreement on auction day or within two business days of the auction, no cooling-off period applies. Once you are a few days past the auction, standard cooling-off rights typically resume, though this varies by state. Step 4 covers state-specific rules in detail.
The auction timeline at a glance
Stage | What Happens |
|---|---|
Listing to auction (2–4 weeks) | Review contract, complete inspections, secure unconditional finance approval |
Before auction starts | Register to bid, receive paddle |
Auctioneer opens | Conditions announced, vendor bid disclosure made |
Bidding | Incremental bids; vendor bids allowed below reserve |
On the market | Bidding has passed reserve; next highest bid wins |
Hammer falls | Contracts signed immediately; 10% deposit paid on the spot |
Passed in | Highest bidder gets first right to negotiate; cooling-off rules vary by state |
Settlement | Typically 30–90 days after auction |