41250 – Auction Day Strategy | Australian Property Network™

41250 — Auction Day Strategy

Overview

Auction day is the point at which weeks of preparation, pricing strategy and marketing convert into a live, public negotiation. For a vendor, the auction is fundamentally different from a private treaty sale: there is no cooling-off period for the winning bidder once the hammer falls, the price is set in real time by competing genuine buyers, and the process is governed by state and territory laws designed specifically to stop that competition from being faked.

This entry sets out how the auction mechanism works from the vendor’s side: how a reserve price is set and used, what a vendor bid is and why it exists, the rules that govern an auctioneer’s conduct on the day, and the outcomes that can follow — sold under the hammer, or passed in and moved into negotiation. Because the single area most likely to mislead vendors and buyers alike is the use (and misuse) of vendor bids, this entry includes a jurisdiction-by-jurisdiction comparison of vendor bid disclosure rules.

Scope & Boundaries

This entry covers:

Setting and reviewing a reserve price with the selling agent, and how the reserve interacts with the auction on the day.
What a vendor bid is, how it differs from a genuine buyer bid, and the state-by-state disclosure and limit rules that govern it.
Auctioneer conduct obligations: announcing vendor bidding arrangements, identifying bidders, and the Bidders Record.
What happens immediately after the auction: sold under the hammer versus passed in, and the vendor’s options at that point.

This entry does not cover:

Deciding whether auction is the right method for a given property in the first place → addressed in Choosing a Selling Method (41220).
Campaign preparation, styling and marketing leading up to auction day → addressed in Preparing a Property for Sale (41210) and Marketing & Staging (41240).
The private-treaty negotiation that follows a property being passed in → addressed in Negotiating & Accepting Offers (41260).
The buyer’s side of auction day — registering to bid, bidding limits and the absence of cooling-off for the successful bidder → addressed in Making an Offer & Negotiation (41170) in the Buying a Property branch.

Key Concepts

Reserve price

The minimum price the vendor has instructed the auctioneer to accept. It is set by the vendor, usually shortly before the auction based on campaign feedback, and is not disclosed to bidders during the auction in most jurisdictions (Victoria has moved toward pre-auction reserve disclosure under its underquoting reforms — see the Regulatory & Legal Framework section below). If bidding reaches the reserve, the auctioneer can declare the property “on the market” and it will sell to the highest bidder from that point.

Vendor bid

A bid made by the auctioneer on behalf of the vendor, rather than by a genuine member of the bidding public. Vendor bids are a lawful tool used to move bidding toward the reserve price when genuine bidding has stalled below it. They are permitted everywhere in Australia in some form, but every jurisdiction requires them to be identified as vendor bids at the time they are made, and most cap either the number allowed or require them to stay below the reserve.

Dummy bidding / false bidding

The unlawful practice of a bid being made or accepted from someone with no genuine intention to buy, staged to look like real competition and undisclosed as coming from the vendor’s side. This is distinct from a properly announced vendor bid: the defining feature of a dummy bid is that it misleads genuine buyers about the true level of interest in the property. Dummy bidding is a criminal offence in every state and territory and attracts significant penalties for agents and auctioneers.

Auctioneer’s pre-auction disclosure

Before bidding opens, the auctioneer is required to state the conditions of sale, including whether vendor bidding will occur during the auction and, in several jurisdictions, how many vendor bids may be made or who will be making them. This disclosure is what allows a genuine bidder to interpret the auction correctly as it unfolds.

Bidders Record

A record the selling agent must keep of every registered bidder’s identity and the bid numbers or paddles allocated to them, along with a record of the vendor bid amount and the highest genuine bid if the property is passed in. In most states this record can only be inspected by the regulator, not by the vendor, which is a deliberate safeguard against collusion.

Passed in

The outcome when bidding stalls below the reserve price and the vendor (through the auctioneer) declines to sell. A passed-in property is typically then offered first to the highest bidder in the room for direct negotiation, and if that does not result in a sale, moves into an ordinary private treaty campaign — see Negotiating & Accepting Offers (41260).

Regulatory & Legal Framework

Vendor bidding sits in tension with the whole purpose of a public auction: a genuine buyer is entitled to assume that competing bids reflect genuine competing interest. Every Australian jurisdiction addresses this by requiring vendor bids to be announced as such at the moment they are made, and most jurisdictions add a numeric limit, a reserve-price ceiling, or both. The table below sets out the current position in each state and territory as independently checked against government or legislative sources.

State/Territory	Vendor Bid Rules	Key Provisions
NSW	Maximum of one vendor bid per auction. It must be made only by the auctioneer (not the vendor personally or an agent from the floor), and the auctioneer must clearly announce it as a vendor bid at the time it is made. The auctioneer must also declare before bidding starts that a vendor bid may occur.	Property and Stock Agents Act 2002 (NSW) s66 (prevention of dummy bidding) and s76A (marketing statements about vendor bids where the property is passed in). Penalties for dummy bidding were doubled to $110,000 for a corporation under 2026 underquoting reforms.
VIC	No fixed numeric cap. The auctioneer may make one or more bids on the vendor’s behalf, but each must be announced as a vendor bid at the moment it is made, and the arrangement must be set out in the auction conditions displayed and read out before bidding starts.	Sale of Land Act 1962 (Vic) s6A; Estate Agents Act 1980 (Vic). Consumer Affairs Victoria auctioneer-obligation guidance confirms disclosed vendor bids are unlimited in number but must be identified every time.
QLD	No fixed numeric cap, but vendor bids may only be made up to, and never at or beyond, the reserve price. The auctioneer must announce each vendor bid. Any seller-side bid made after the reserve is reached is an unlawful “false bid.”	Property Occupations Act 2014 (Qld) s214 (auctioneer must not disclose reserve or accept a bid at/above it on the seller’s behalf) and s216. The vendor’s reserve must be given to the auctioneer in writing before the auction.
WA	No statutory numeric cap; instead a disclosure regime. The auctioneer must announce, before bidding starts, the maximum number of bids the seller (or someone bidding on the seller’s behalf) may make and who will be making them, and must identify each such bid contemporaneously. A seller-side bid can never reach or exceed the reserve.	Real Estate and Business Agents Act 1978 (WA) and the Real Estate and Business Agents and Sales Representatives Code of Conduct 2016 made under it; a breach of an agent’s conduct obligations can be taken to the State Administrative Tribunal, which may impose a fine of up to $10,000 or licence sanctions under that Act.
SA	Maximum of three vendor bids, each of which must be below the reserve price and announced by the auctioneer as a vendor bid. Vendor bidding is only permitted at all if the auction conditions allow it and the auctioneer discloses this before bidding starts.	Land and Business (Sale and Conveyancing) Act 1994 (SA), Part 4A, s24O.
TAS	No fixed numeric cap identified. An auctioneer may bid on behalf of the owner if the auction conditions permit it, the auctioneer orally declares this before bidding starts, and audibly identifies each such bid as it is made — stating “vendor bid” is treated as sufficient compliance.	Property Agents and Land Transactions Act 2016 (Tas), auction-conduct provisions including a dummy-bidding offence and a requirement to identify the last vendor bid if the property is passed in.
ACT	Maximum of one vendor bid, mirroring the NSW position. The auctioneer must state audibly that the bid is being made for the seller.	Agents Act 2003 (ACT) governs agent conduct generally; the Civil Law (Sale of Residential Property) Act 2003 (ACT) requires a bidder’s record for residential public auctions. Dummy bidding is prohibited under general agent conduct obligations.
NT	No fixed numeric cap identified. A vendor bid may be made by the vendor personally, by a representative, or through the auctioneer, provided it stays below the reserve and the auctioneer identifies it as a vendor bid when made. NIL RETURN — a specific NT statutory section fixing a numeric cap could not be independently confirmed as of 29 August 2026.	Agents Licensing Act 1979 (NT) provides the licensing and conduct framework for auctioneers; dummy bidding is treated as prohibited misleading conduct under that framework.

Two things are constant across every jurisdiction regardless of the numeric detail above: a vendor bid must always be announced as such at the moment it is made, and a genuinely undisclosed dummy bid is a criminal offence everywhere in Australia. Vendors should also be aware that from the point bidding reaches the reserve, virtually every jurisdiction treats a further seller-side bid as unlawful — the vendor’s leverage through vendor bidding is spent once the reserve is met, and from that point the property is “on the market” to the genuine highest bidder.

Bidder identification is a related conduct safeguard that applies alongside the vendor bid rules: bidders must generally register and display a unique identifying number before they can bid, and the auctioneer must audibly announce that identifier when accepting a bid. The resulting Bidders Record is confidential and, in most states, cannot be shown to the vendor — only to the regulator — specifically to prevent the vendor from using bidder information to influence the auction improperly.