21/05/2026
Insights
Buying property at auction requires financial preparation that goes beyond simply having a deposit available. The completion timescales are shorter than in private treaty sales, and the commitment made on auction day is legally binding from the moment the hammer falls. Understanding your finance options before you bid, not after, is what separates buyers who complete smoothly from those who run into difficulty.
This guide covers the main funding routes available for auction purchases, what each one involves, and how to approach the process of getting your finances in place ahead of the auction.
Why does auction finance work differently?
In a standard property sale, buyers typically have weeks or months to arrange their mortgage after an offer is accepted. Auction is different. When you're the successful bidder, contracts exchange immediately, and you pay your deposit on the day. The balance (the remaining 90 per cent of the purchase price) is due within a fixed completion window, typically 28 days for unconditional auctions.
That compressed timescale means your finance needs to be agreed in principle, if not fully confirmed, before you walk into the auction. Lenders who aren't familiar with auction timescales can struggle to move quickly enough, which is why specialist auction finance products exist and why preparation matters so much.
What finance options are available for auction purchases?
Cash
The simplest and most straightforward option. Cash buyers have no lender timescales to worry about and can complete within the auction's required window without difficulty. If you have the funds available, cash removes a significant layer of risk from the process for both the buyer and seller.
Bridging finance
Bridging loans are short-term secured loans designed specifically for situations where speed is essential. They can typically be arranged within days rather than weeks, which makes them well-suited to auction purchases. A bridging loan is usually secured against the property being purchased, and sometimes against additional assets, and is repaid once a longer-term mortgage is arranged or the property is sold.
Bridging finance is particularly common for renovation properties and commercial purchases where mainstream mortgage products are not available or cannot be arranged quickly enough. Interest rates are usually higher than standard mortgages, so bridging loans are best used as a short-term solution with a clear exit strategy in place before you commit.
Mortgage
Standard residential and buy-to-let mortgages can be used for auction purchases, but the timescale is the critical factor. Most mortgage offers take several weeks to process, and lenders will require a property valuation before issuing a formal offer. For unconditional auction purchases with a 28-day completion window, this is tight, and not all lenders will be willing or able to move at the speed required.
If you plan to use a mortgage for an auction purchase, speak to a broker experienced with auction timescales well before the auction date. Having a decision in principle in place before you bid is the minimum, but, ideally, you want a formal mortgage offer confirmed ahead of the auction.
Auction finance through Together
Our partners at Together offer specialist auction finance products for eligible purchases. Together understand auction timescales and can move quickly, making them a practical option for buyers who need funding arranged efficiently. It's worth exploring this early in your preparation, well before you identify a specific lot.
Use Together for auction finance
Together offers auction finance that aligns with the timescales you're working towards. Learn more about what they offer today.
What costs should I budget for beyond the purchase price?
Finance planning for an auction purchase needs to account for more than the hammer price. The following costs apply to most auction purchases and should be factored into your overall budget before you set a maximum bid.
- Deposit – A deposit of 10 per cent of the purchase price is required on auction day if you are the successful bidder, subject to a minimum of £5,000.
- Buyer's fees – Most auction purchases carry a buyer's fee, which is charged in addition to the hammer price.
- Legal costs – You will need a solicitor to act for you in the purchase. Legal fees vary depending on the complexity of the transaction, but budget for at least £1,000 to £1,500 for a straightforward residential purchase.
- Stamp duty land tax – Stamp duty land tax applies to most property purchases in England and Northern Ireland, with equivalent taxes applying in Scotland and Wales. The amount due depends on the purchase price, whether you already own property, and whether you are buying as an individual or through a company.
- Survey and due diligence costs – Instructing a surveyor to assess the physical condition of a property before you bid is advisable. Survey fees vary depending on the property type and level of inspection required.
How to prepare your finances before an auction
1. Start early
The most common mistake buyers make is leaving finance too late. Identify your preferred auction format, understand the completion timescale that applies, and begin conversations with lenders or brokers well before you identify a specific lot. Being financially prepared in advance means you can move quickly when the right property appears.
2. Speak to a specialist broker
Not all mortgage brokers understand the specific requirements of auction purchases. A broker with auction experience will know which lenders can move at the speed required, which products are suitable for different property types, and how to structure your application to give it the best chance of completing within the auction's timescale.
3. Get a decision in principle
For mortgage buyers, having a decision in principle confirmed before the auction gives you a realistic sense of your borrowing capacity and signals to any lender you subsequently approach that your application has already been assessed at a basic level. It won't guarantee a formal offer, but it reduces the risk of a last-minute decline.
4. Know your total budget, not just your bid limit
Your maximum bid is not the same as your total budget. Factor in the deposit, buyer's fees, legal costs, stamp duty, and any works required before setting the figure you're prepared to bid to. Buyers who conflate the hammer price with their total outlay sometimes find themselves committed to a purchase that stretches their finances beyond what they had planned.
What happens if I can't complete after winning a bid?
If you are the successful bidder at an unconditional auction and fail to complete within the agreed timeframe, you will lose your deposit. The seller may also have the right to pursue you for any shortfall if the property subsequently sells for less, as well as additional costs incurred as a result of your failure to complete. This is a legally binding commitment, so you must treat it as such.
The best protection against this outcome is thorough financial preparation before you bid. If you have any doubt about your ability to complete within the required timescale, it is better to wait for a future auction than to commit to a purchase you cannot fund.
Ready to find your next auction property?
If you have your finances in place and want to explore what's available, browse our current listings and register to bid ahead of any upcoming auction. For guidance on the buying process more broadly, our guide to buying at auction covers everything from registration to completion.
Sellers can book a free appraisal to find out what auction could achieve for their property. Call us on 0345 505 1200 or use the form below with any questions.
Get in touch with the BTG Eddisons Property Auctions team
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