Auction Bidding Strategy Guide: How to Buy Property at Auction in Australia

Overview

Buying property at auction is one of the most common and competitive ways to purchase real estate in Australia, particularly in Sydney and Melbourne. Auctions are fast-paced and legally binding — there is no cooling-off period once the hammer falls. This guide covers everything you need to know, from preparation to bidding tactics to what happens after you win.

Before the Auction

Do Your Research

• Inspect the property at least once, ideally twice. Attend the open inspections and take notes.
• Review the contract of sale — have your conveyancer or solicitor review it before auction day. Once the hammer falls, you are legally bound to the contract as-is.
• Obtain a building and pest inspection — at your own cost. There is no cooling-off period at auction, so you cannot make the purchase conditional on inspections.
• Research comparable sales — look at recent sale prices of similar properties in the area to establish a realistic value range.
• Confirm your finance — get pre-approval from your lender. You should know your maximum borrowing power before you bid. Use our Borrowing Power Calculator to estimate how much you can borrow.

Set Your Maximum Price

Determine the absolute maximum you are willing to pay and commit to it. Factor in all purchase costs — stamp duty, conveyancing, inspections, and moving costs — not just the property price. Use our Stamp Duty Calculator to estimate your stamp duty liability.

Write your limit down. Tell your partner or bidding companion. Do not exceed it in the heat of the moment.

Auction Day

Registration

You must register to bid before the auction begins. Bring:

• Photo identification (driver's licence or passport)
• Your deposit (usually a bank cheque for 10% of the expected price, or confirmation that you can transfer the deposit)

Once registered, you receive a bidder number. Only registered bidders can make bids.

How the Auction Works

1. The auctioneer opens the auction and may set an opening bid or invite bids from the crowd
2. Bidding proceeds in increments — the auctioneer may suggest increments, but you can bid any amount above the current bid
3. The auctioneer may make vendor bids on behalf of the seller to advance the bidding toward the reserve price. Vendor bids must be announced as such.
4. Once bidding reaches the reserve price (the minimum the seller will accept), the property is declared "on the market" and will be sold to the highest bidder
5. The auctioneer calls "going once, going twice, sold" and the hammer falls

Vendor Bids and Reserve Price

The vendor (seller) sets a confidential reserve price before the auction. If bidding does not reach the reserve, the property is "passed in" and is not sold. The highest bidder typically gets the first opportunity to negotiate with the seller after a passed-in auction.

Vendor bids are bids placed by the auctioneer on behalf of the seller to encourage bidding. They are legal but must be clearly identified. Once genuine bidding reaches the reserve, no further vendor bids can be made.

Bidding Tactics

Start with Confidence

Opening the bidding or making an early strong bid signals that you are serious. Some buyers prefer to open with a figure slightly above the expected opening to take control of the auction.

Control the Increments

You do not have to accept the auctioneer's suggested increments. If the auctioneer calls for bids in $10,000 increments, you can bid in $5,000 or even $1,000 increments as the price approaches your limit. Smaller increments slow the auction and can discourage other bidders.

Bid Quickly

Responding quickly to competing bids projects confidence and can unsettle other bidders. Hesitation can encourage competitors to keep bidding.

Know When to Stop

This is the most important tactic. Once the price reaches your predetermined maximum, stop. Do not get caught up in the emotion of the event. Walking away is always an option.

Avoid Emotional Bidding

Auctions are designed to create urgency and competition. Stay calm, stick to your limit, and remember that there will always be other properties.

No Cooling-Off Period

This is critical: there is no cooling-off period for properties purchased at auction in any Australian state or territory. Once the auctioneer's hammer falls and you are the highest bidder, you are legally committed to the purchase. You cannot withdraw without potentially losing your deposit and facing legal action from the seller.

This is why pre-auction preparation — finance pre-approval, contract review, and inspections — is essential.

After the Hammer Falls

If you are the successful bidder:

1. You sign the contract of sale immediately
2. You pay the deposit (usually 10% of the purchase price) on the spot — typically by bank cheque or electronic transfer
3. Settlement occurs on the date specified in the contract (usually 30 to 90 days)
4. Your conveyancer manages the settlement process from this point

If the property is passed in (does not reach the reserve):

• The highest bidder has the first right to negotiate privately with the seller
• If you were the highest bidder, your conveyancer should be present to assist with negotiations
• Any purchase negotiated after a passed-in auction may include a cooling-off period (depending on the state)

Buying Before Auction

In some cases, sellers accept offers before auction day. If you want to buy before auction, your offer typically needs to be strong (at or above the expected range) and may need to be unconditional. Discuss this option with the selling agent.

Check your borrowing power: Borrowing Power Calculator | Calculate stamp duty: Stamp Duty Calculator | Estimate repayments: Mortgage Repayment Calculator.

Sources: Consumer Affairs Victoria — Buying at Auction, NSW Fair Trading — Property Auctions, REIV, Domain.