The number of people actually raising a hand at Melbourne auctions has collapsed to two per sale, analysis of several hundred recent auctions shows. A year ago the same properties would have drawn three bidders. Even in early 2024, with identical interest rates, the average sat around 2.4.
The drop is the sharpest recorded fall in active bidder participation, and it’s happening while auction volumes have already retreated to pandemic-era lows. This week saw just over 700 scheduled auctions across Melbourne, roughly half the 1,200 held in the corresponding spring week last year.
What the bidder count actually measures
Price movements tell you what sold. Bidder numbers tell you how contested the sale was, a direct read on buyer confidence, urgency and the depth of the active market at any given moment.
Two bidders is functionally a one-on-one negotiation conducted in public. Three or more creates genuine competition and upward price pressure. The shift from three to two represents a structural change in how auctions resolve, not just a modest softening.
Clearance rates over the same period have hovered around 60–62 per cent, a figure that sounds stable until you account for the denominator. Fewer auctions mean fewer marginal listings. The properties reaching auction now are the ones vendors believe can clear. The rest have moved to private treaty or been pulled.
Why participation collapsed this sharply
The federal budget changes to negative gearing and capital gains tax treatment, announced in May, removed a cohort of buyers from the auction floor almost immediately. Investor attendance at open homes dropped in tandem.
But the timing alone doesn’t explain the full magnitude. Interest rates in 2024 were at current levels, yet bidder numbers then averaged 2.4. The policy shift appears to have accelerated an existing retreat rather than caused it outright.
Low open-home attendance is now feeding back into bidder registration. Fewer people inspecting means fewer people committing to compete. The cycle reinforces itself: thin crowds signal weak competition, which discourages marginal buyers from entering the process.
The catch
- Auction volumes down ~40% year-on-year, meaning sample skew toward stronger properties
- Bundoora, Mill Park, South Morang and Glen Waverley still averaging 3+ bidders, but across just six Bundoora auctions in four weeks
- 61.8% preliminary clearance rate may revise lower as withdrawn and passed-in results finalise
- Victoria’s new reserve-disclosure law takes effect October 1, adding execution friction for agents and vendors mid-spring
Who benefits from a two-bidder market
Buyers with pre-approval and genuine intent face less competition. A sale that would have drawn four or five bidders 18 months ago now resolves between two parties, often below the upper end of the price guide.
Vendors who price at or slightly below recent comparable sales are still clearing. The properties succeeding in this environment are the ones where the reserve meets current buyer appetite, not where it’s anchored to 2023 peak levels.
Suburbs recording three or more bidders, Bundoora, Mill Park, South Morang, Glen Waverley, share two traits: constrained stock and realistic vendor pricing ahead of auction day. The economist’s read: vendors in these pockets adjusted expectations before the campaign, not during the auction.
Trade-offs for vendors choosing auction now
Auction still delivers price discovery and a fixed sale date, but the method now carries higher execution risk. With two bidders, one withdrawal or low opening bid can collapse the process entirely.
Private treaty avoids the public price test but extends the timeline and removes the urgency lever. In a thin market, urgency matters less, buyers are not competing on speed.
The October 1 reserve-disclosure law adds another variable. Early trial results (a Rowville property sold for $1.336 million against a published $1.325 million reserve) suggest the rule doesn’t kill competition when pricing is realistic. But it does remove the auctioneer’s ability to manage underbidding through process ambiguity.
Scenarios over the next 8–12 weeks
Base case: bidder numbers stabilise around two per auction through spring, clearance rates drift between 58–63%, and vendors either meet the market or pull listings. Auction volumes remain 30–40% below prior-year levels.
Upside: interest rate cut in November pulls sidelined buyers back into the market, bidder numbers lift to 2.5–3 range, clearance rates push toward 65%. Requires RBA to move and buyer confidence to respond faster than usual.
Downside: reserve-disclosure law creates execution friction, vendors delay campaigns to avoid publishing a number, auction volumes fall further, and the method loses modal status in Melbourne for the first time in a generation. Bidder numbers drop below two as only the most confident buyers commit.
What to watch over the next month
Revised clearance rates each week, preliminary figures often overstate by 2–4 percentage points. Open-home attendance trends, particularly in the outer-middle ring where investor retreat has been sharpest. Vendor behaviour post-October 1: do they publish realistic reserves or shift to private treaty to avoid the disclosure? And interest rate commentary from the RBA’s October meeting, any signal on timing will either pull buyers forward or confirm the wait.
For buyers: competition is thin, but so is stock in the segments still drawing multiple bidders. If you’re pre-approved and the property fits, this is the environment to act. For vendors: pricing has to be defensible against the last 60 days of settled sales in your suburb, not what you saw 12 months ago. Two bidders is enough to get a sale done, but only if one of them opens at or near your reserve.
Auction clearance rates Sydney: registration collapse signals pricing standoff tracks a similar dynamic interstate, worth reading if you’re weighing method risk.
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General info, not financial advice.
