4 July 2025
If you're considering buying or selling property through an auction, understanding the terms and conditions is crucial. Auctions move fast, and if you're not familiar with the rules, you could end up making a costly mistake.
So, what exactly do you need to watch out for? Whether you're a first-time bidder or an experienced investor, this guide will break down everything you need to know in simple terms.
Let’s dive in!

What Are Auction Terms and Conditions?
Auction terms and conditions are the rules and guidelines that govern how a property auction is conducted. Think of them as the fine print that ensures everything runs fairly and smoothly.
These rules outline things like:
- How bidding works
- Payment expectations
- The role of deposits
- Fees and commissions
- Legal obligations for buyers and sellers
Ignoring these details could lead to unexpected costs or legal trouble. That’s why it's important to fully understand them before you raise your hand (or click that bid button).

Key Terms You Need to Know
Before we get into the nitty-gritty, let's go over some of the most important auction-related terms.
1. Reserve Price
The reserve price is the minimum amount a seller is willing to accept for a property. If bidding doesn’t reach this amount, the property won’t be sold.
Think of it as the seller’s safety net. They don’t have to settle for a lower price than they’re comfortable with.
2. Starting Bid
The starting bid is the lowest amount the auctioneer will accept at the beginning of the auction. It’s usually set to encourage interest and competition among buyers.
3. Hammer Price
This is the final bid price when the auctioneer’s hammer falls. It's the amount the winning bidder agrees to pay (excluding additional fees or taxes).
4. Buyer’s Premium
This is an additional fee paid by the winning bidder on top of the hammer price. Auction houses charge this as their commission.
For example, if the buyer’s premium is 5% on a $200,000 property, you’d owe an extra $10,000.
5. Deposit Requirement
Winning a bid isn’t the end of the story—you usually have to make an immediate deposit to secure the property. This deposit is typically
10% of the final price, but it can vary.
Failing to provide this deposit could mean losing your bid and facing penalties.
6. "As-Is, Where-Is" Condition
Most auction properties are sold in an
"As-Is, Where-Is" condition. This means the property is sold exactly as it stands, with no guarantees or warranties.
If there’s hidden damage, structural problems, or outstanding taxes, you're responsible for handling them. That’s why doing your research before bidding is crucial!
7. Vendor Bids
Auctioneers sometimes place bids on behalf of the seller to keep the price moving. These are called
vendor bids and are usually disclosed before the auction starts.
However, not all auctions allow vendor bids, so always check the terms!
8. Gazumping
In some cases, even after you've won the auction, the seller might accept a
higher offer from another buyer before contracts are finalized. This is called
gazumping, and it can be frustrating—especially if you’ve already prepared finances and paperwork.
To avoid this, make sure you move quickly after winning your bid.

Types of Auctions and Their Rules
Not all property auctions are the same. Here's a breakdown of the different types and their unique terms.
1. Absolute Auctions
In an
absolute auction, there is no minimum reserve price. The highest bid wins, no matter what.
This type of auction can be risky for sellers but is great for buyers looking for a bargain.
2. Reserve Auctions
In a
reserve auction, the seller sets a minimum price they’re willing to accept. If bidding doesn’t reach this amount, the seller isn’t obligated to sell.
3. Online Auctions
Online property auctions operate similarly to live auctions, but they give bidders more flexibility to participate from anywhere.
4. Sealed Bid Auctions
In a
sealed bid auction, bidders submit their highest offer in a confidential manner. The seller then reviews all bids and selects the best one.
This type of auction avoids the excitement-driven price hikes of live auctions.

Legal Obligations After Winning an Auction
So, you’ve won the bid—what happens next?
1. Signing the Sales Contract
Once the auction is over, you’ll typically need to sign a
contract of sale right away. This document legally binds you to the purchase.
2. Paying the Deposit
As mentioned earlier, you’ll be required to pay an initial deposit (usually 10% of the purchase price). This must be done immediately or within a few hours of winning.
3. Settlement Period
The
settlement period is the time between winning the auction and officially taking ownership of the property. This period is usually
30 to 90 days, depending on the auction.
During this time, you’ll need to:
- Finalize financing
- Arrange property inspections
- Prepare legal documents
If you fail to complete the purchase within the settlement period, you could lose your deposit and face legal consequences.
Tips to Avoid Costly Auction Mistakes
Now that you understand the terms, let’s talk about some common mistakes buyers make and how you can
avoid them.
1. Not Doing Proper Research
Auction properties often come with hidden issues. Always
inspect the property beforehand and check for outstanding debts.
2. Getting Caught in a Bidding War
It’s easy to get carried away when bidding against others. Set
a maximum price limit for yourself and stick to it!
3. Overlooking Additional Costs
Remember, the
hammer price isn’t the final cost. Factor in the buyer’s premium, taxes, repairs, and legal fees before bidding.
4. Not Having Financing Ready
In most cases, auction sales are
final—there’s no backing out. Secure financing before the auction to avoid any last-minute surprises.
5. Not Reading the Terms and Conditions
Every auction has different rules. Read the terms carefully so you’re not caught off guard by unexpected fees or conditions.
Final Thoughts
Property auctions can be
exciting and rewarding, but they also come with risks. Understanding the terms and conditions beforehand ensures you don’t make costly mistakes.
Whether you’re a first-time buyer or a seasoned investor, knowledge is your best tool. So, before you place your first bid, take the time to research, plan, and prepare.
Happy bidding!