Underquoting in Australia: How Property Buyers Are Misled (And How to Protect Yourself)

You’re told a home is worth $700,000. You do your research. You organise finance. You pay for a building inspection. You show up to auction, paddle in hand.

The property sells for $820,000.

You never had a chance. And the agent knew it.

This is underquoting in real estate in Australia. It happens in every capital city, at hundreds of auctions every weekend, and it costs buyers thousands of dollars in wasted time, professional fees, and emotional energy.

If you’ve ever walked away from an auction wondering why the sale price was so far above the advertised guide, you’re not imagining things. The system is designed this way.

This guide explains exactly what underquoting is, whether it’s illegal, how agents do it, and most importantly how to protect yourself from falling for it.

What Is Underquoting in Real Estate?

Underquoting occurs when a real estate agent advertises a property at a price they know is below what the property is likely to sell for.

The agent publishes a low price guide say $650,000 to $700,000 knowing full well the vendor’s reserve is $780,000 and the property will almost certainly sell above $800,000.

The purpose is simple: attract as many buyers as possible. A lower price guide brings in more enquiries, more inspections, and more registered bidders. More bidders means more competition. More competition means a higher final sale price.

The buyers who couldn’t afford the real price were never in the running. They were used as auction filler.

Underquoting is most common at auctions, but it also occurs in private sale campaigns where agents use “Offers Over” or “Price Guide” figures that are deliberately set below realistic expectations.

Why Do Properties Sell Above the Price Guide?

There are four reasons properties consistently sell above their advertised price range. Understanding each one helps you separate legitimate market dynamics from deliberate manipulation.

1. Strategic Underpricing

This is the most common and most deliberate cause. The agent sets the price guide low to maximise buyer interest. It’s a calculated marketing tactic designed to create the appearance of a bargain.

The agent knows the property is worth more. The vendor knows it’s worth more. But the advertised price doesn’t reflect that knowledge because a low guide attracts more bidders than an accurate one.

2. Auction Competition

Auctions are competitive by nature. When multiple buyers want the same property, bidding drives the price above any single buyer’s initial expectation.

In a genuine scenario, this can happen even with an accurate price guide. Two emotionally committed buyers can push a sale price 10% to 20% above the guide without any underquoting being involved.

The problem is distinguishing between genuine competition and competition that was manufactured by a misleadingly low guide.

3. Buyer Psychology

Once buyers commit time and money to a property inspections, legal review, building reports—walking away feels like a loss. Behavioural economists call this the sunk cost fallacy.

By the time auction day arrives, buyers are psychologically invested. They’ve told friends and family. They’ve imagined living there. That emotional commitment pushes them to bid beyond their planned limit.

Underquoting exploits this by getting buyers emotionally invested before the real price becomes clear.

4. Market Heat

In rapidly rising markets, a property genuinely can sell above its initial guide because values moved between listing and auction day. This is more common in boom periods where suburb medians jump month to month.

However, experienced agents account for market momentum when setting price guides. If they don’t, the question becomes whether the omission was naive or strategic.

Is Underquoting Illegal in Australia?

Yes—in several states. But enforcement is inconsistent, and the rules vary significantly.

The uncomfortable reality: Underquoting is illegal on paper in several states, but it remains widespread because enforcement is complaint-driven, penalties are modest relative to agent commissions, and the line between “strategic pricing” and “underquoting” is difficult to prove.

An agent can argue the market moved, that unexpected buyer demand drove the price up, or that their initial estimate was reasonable at the time. Proving deliberate intent is the enforcement challenge.

How Underquoting Actually Happens (Behind the Scenes)

Underquoting isn’t always blatant. It’s often subtle, built into the agent’s language and marketing strategy.

Step 1: The agent sets a low price guide. They choose comparable sales that support the lower end of the range, ignoring higher-priced recent sales that would suggest a more accurate figure.

Step 2: The vendor sets a high reserve. Behind closed doors, the vendor and agent agree on a reserve price that is significantly above the published guide. The agent knows the guide won’t reach the reserve but that’s the point.

Step 3: The agent uses vague language. Phrases like “we’re seeing interest in the sevens” or “the vendor has expectations above the guide” are deliberately imprecise. They give the impression of transparency without actually committing to a number.

Step 4: Buyers invest time and money. Based on the low guide, buyers pay for building inspections ($400–$800), legal reviews ($500–$1,500), and strata reports. They take time off work for inspections. They commit emotionally.

Step 5: Auction day reveals the real price. Bidding opens near the guide and quickly accelerates. The reserve is passed. The property sells 15% to 25% above the advertised range. Most registered bidders never had a realistic chance.

The buyers who were priced out from the start subsidised the auction’s competitive energy with their time, money, and emotions.

➡ Avoid overpaying use our free valuation tool at RE4U to check a property’s real worth before you bid.

Real Example of Underquoting

Scenario: A three-bedroom house in an inner Melbourne suburb is listed for auction with a price guide of $950,000 to $1,040,000.

A first-home buyer couple sees the listing, gets excited, and begins their due diligence. They pay $650 for a building and pest inspection and $800 for a solicitor to review the contract of sale. They attend three open homes over consecutive weekends.

At auction, bidding opens at $1,000,000 and moves quickly. The reserve is met at $1,120,000. The property eventually sells for $1,185,000.

That’s $145,000 above the top of the advertised guide.

The couple’s maximum budget was $1,050,000. They were never going to win. But they spent $1,450 in professional fees, three weekends of inspections, and weeks of emotional investment on a property that was always out of reach.

Were comparable sales in the area supporting a $950,000 guide? Almost certainly not. Similar properties in the same suburb had been selling above $1.1 million for months.

This is how underquoting works. The low guide wasn’t a mistake. It was a strategy.

Why This System Continues

Agent incentives. Agents earn a percentage commission on the sale price. A higher sale price means a higher fee. There is a direct financial incentive to attract as many bidders as possible, and a low price guide is the most effective way to do that.

Market competition between agents. When agents pitch for listings, they compete against other agents. One way to win the listing is to promise the vendor a high sale price. The strategy to deliver on that promise? Underquote the guide to generate maximum competition.

Legal grey areas. The difference between a “conservative estimate” and “deliberate underquoting” is subjective. Agents can argue they believed the guide was reasonable at the time of listing. Proving otherwise requires regulators to demonstrate intent, which is expensive and difficult.

Buyer passivity. Most buyers who experience underquoting don’t complain formally. They feel frustrated, but they don’t file a report with Consumer Affairs or Fair Trading. Low complaint rates give regulators less ammunition to act.

How Hidden Pricing Strategies Affect Buyers

Underquoting is one piece of a larger puzzle. Hidden pricing where agents list properties as “Contact Agent” with no price at all is another tactic that creates information asymmetry and puts buyers at a disadvantage.

Both strategies share the same root: the agent controls the information, and the buyer operates in the dark.

For the complete breakdown of how hidden property pricing works in Australia including emotional anchoring, “Contact Agent” strategies, and the full system agents use to maximise sale prices read our comprehensive guide.

➡ The ‘Contact Agent’ Trap: How Hidden Property Prices Are Costing Australians Millions

How to Spot Underquoting Early

You can’t always prove underquoting, but you can learn to recognise it before you invest time and money.

• The price guide is significantly below recent comparable sales. If three similar homes in the suburb sold for $1.1 million to $1.2 million in the past three months, and this one is guided at $950,000 to $1.04 million, something doesn’t add up.

• Open home attendance is unusually high. If 80 groups come through an open home, the guide is probably too low. Genuine pricing attracts qualified buyers, not crowds.

• The agent is vague about price expectations. Phrases like “the market will decide” or “we expect strong interest” without committing to a range are warning signs. An honest agent will tell you where the vendor’s expectations sit.

• The property was previously listed at a higher price. Check listing histories. If the same property was listed six months ago at $1.15 million and is now guided at $980,000 without a significant change in condition, that’s a red flag.

• The agent discourages pre-auction offers. If the agent actively pushes all interest toward auction day rather than considering pre-auction offers, they may be prioritising competitive bidding over a straightforward sale.

How to Protect Yourself as a Buyer

• Do your own valuation. Never rely on the agent’s price guide as your basis for what the property is worth. Use comparable sales, price-per-square-metre analysis, and suburb trend data to form an independent estimate.

• Ignore the published price guide entirely when setting your budget. Treat it as marketing material, not financial guidance. Your budget should be based on your own research and your borrowing capacity—not the agent’s number.

• Set a strict walk-away price before auction day. Write it down. Share it with anyone who’s bidding on your behalf. The most common and most expensive mistake at auction is revising your limit upward in the heat of the moment.

• Limit your financial exposure before you’re confident. Don’t pay for a building inspection until you’ve verified the property is genuinely within your budget using comparable sales. The $600 you save on a building report for an underquoted property is $600 you can put toward a property you can actually afford.

• Report suspected underquoting. If you believe an agent has deliberately underquoted, file a complaint with your state’s consumer protection body. In Victoria, contact Consumer Affairs Victoria. In NSW, contact NSW Fair Trading. In WA, contact the Department of Mines, Industry Regulation and Safety. More complaints mean more regulatory attention.

How to Make the Right Offer Despite Underquoting

When you know a property might be underquoted, your offer strategy has to adapt. You can’t rely on the agent’s guide. You need to build your offer from independent data.

Our step-by-step offer framework shows you exactly how to calculate the right number—whether you’re buying at auction or through private sale, in a hot market or a buyer’s market.

➡ Read our complete guide: How Much Should You Offer on a House in Australia?

Final Thoughts

Underquoting is one of Australian real estate’s worst-kept secrets. Everyone knows it happens. Regulators are slowly tightening the rules. But for now, the burden falls on buyers to protect themselves.

The agents and vendors who benefit from underquoting aren’t going to stop voluntarily. The incentives are too strong. The penalties are too weak. And the emotional dynamics of auctions make it devastatingly effective.

Your best defence is information.

Research comparable sales before you attend a single open home. Set your walk-away price before you register to bid. And never let an agent’s price guide be the basis for your financial decisions.

The system is imperfect. But an informed buyer is a protected buyer.

Be the buyer who knows the real price before anyone calls for an opening bid.

➡ Download the Property Buyer’s Pricing Playbook from RE4U – valuation checklists, underquoting red flags, and auction-day strategies.

➡ Heading to auction soon? Talk to a RE4U buyer advocate for expert support before you bid.

Frequently Asked Questions

Q: Is underquoting illegal in Australia?

Yes, in several states. Victoria and New South Wales have specific legislation that prohibits agents from advertising below their own estimate or the vendor’s reserve. In Western Australia, Queensland, and other states, general consumer protection laws apply but there is no dedicated underquoting statute. Enforcement varies significantly and relies heavily on buyer complaints.

Q: Why do houses sell above the guide price?

Properties sell above the guide for several reasons: the agent may have deliberately set a low guide to attract more buyers (underquoting), genuine auction competition may have driven the price up, buyer psychology and emotional bidding can push prices beyond rational limits, or rapid market growth may have outpaced the original estimate.

Q: How can I avoid being affected by underquoting?

Do your own comparable sales research before investing time or money in a property. If the price guide is significantly below recent sales of similar properties in the same suburb, treat it as a warning sign. Set your budget based on your own data, not the agent’s guide, and establish a firm walk-away price before auction day.

Q: Can I report underquoting?

Yes. In Victoria, file a complaint with Consumer Affairs Victoria. In New South Wales, contact NSW Fair Trading. In Western Australia, contact the Department of Mines, Industry Regulation and Safety. Include the listing details, the advertised price guide, comparable sales data, and the final sale price to support your complaint.

Q: How do I know if a property is underquoted?

Compare the advertised price guide to recent comparable sales in the same suburb. If similar properties have been selling for significantly more than the guide, the property may be underquoted. Other signs include unusually high open home attendance, vague agent responses about price expectations, and agents who discourage pre-auction offers.

Q: What is the difference between underquoting and a competitive auction?

A competitive auction occurs when genuine buyer demand pushes the price above the guide, even when the guide was set accurately. Underquoting occurs when the guide was deliberately set below what the agent knew the property was likely to sell for. The difference is intent, which is why underquoting is difficult to prove and enforce.