Auction finance explained
A property auction gives you roughly 28 days to complete once the hammer falls, and a high-street mortgage rarely moves at that pace. Auction finance is the short-term bridging facility built for that deadline, and this guide explains how it works for commercial and investment buyers.
Auction finance is short-term bridging debt shaped to the tight timescales of a property auction, where the purchase becomes legally binding at the fall of the hammer and completion usually falls due within 28 days. It funds the balance after your deposit, works from a decision in principle agreed before you bid, and is secured against the lot you are buying. We arrange it for commercial and investment buyers across residential investment, commercial, mixed-use, land and unmortgageable property, then set up the exit onto a term loan or a sale. We are an arranger, not a lender, and this is unregulated commercial finance.
At a glance
- What it isBridging shaped to auction deadlines
- Deposit at the hammerUsually 10 percent
- CompletionCommonly within 28 days
- Typical loan to valueUp to 70 to 75 percent of value
- Indicative interestAround 0.95 percent per month
- ExitTerm refinance or sale
What is auction finance?
Auction finance is a bridging loan arranged specifically for buying at a property auction. When the hammer falls you are contractually committed, so the finance has to be certain and fast rather than merely competitive. A standard commercial mortgage is built for a leisurely purchase timeline and cannot usually be drawn inside a month, which is why auction buyers turn to short-term bridging finance instead.
Structurally it is the same instrument we arrange for other time-critical purchases: a short-term loan secured against the property, priced for speed, and repaid from a refinance or sale rather than from long-term income. It sits within the wider family of bridging loans for commercial and investment property at /blog/bridging-loans-for-commercial-and-investment-property/, applied to the auction room. It is unregulated commercial lending for investors and businesses, not a consumer product.
The 28-day completion deadline and 10 percent deposit
Auctions run to a fixed contract. At the fall of the hammer the sale exchanges immediately: you are legally bound to buy, you pay a deposit on the day, usually 10 percent of the price, and the balance falls due on the completion date set in the catalogue. That date is commonly 28 days later, though some lots complete in 14 or 20 days, so always check the completion date before you bid.
If you miss the completion date you can forfeit your deposit and face costs for the seller's losses, so the money has to be in place, not merely promised. Auction finance is arranged around that hard date: the offer and valuation are lined up before the sale, and drawdown is timed to complete inside the 28 days.
Because the deposit leaves your own funds on the day, auction finance is usually sized against the price and value of the lot, advancing up to around 70 to 75 percent of value so your cash goes into the deposit and costs rather than the whole purchase.
Preparing before the auction: decision in principle and legal pack
The work that makes an auction purchase safe happens before you raise your hand. The single most important step is a decision in principle from a funder, so you bid knowing the finance is realistic and the numbers stack up.
- Get a decision in principle before the sale, so you know your ceiling and can bid with confidence.
- Read the legal pack in full, ideally with a solicitor who knows auction purchases, and flag anything that affects value or timing.
- Commission or budget for a valuation, because the funder lends against the valuer's figure, not the guide price.
- Budget for the deposit, arrangement fee and legal costs on top of the loan, so nothing is a surprise on the day.
The legal pack is where the risks hide. It is worth checking each of these before you commit:
- Title and any restrictions, covenants or rights of way that limit what you can do
- Tenancies in place, including whether the lot is sold with vacant possession or an existing tenant
- Searches, special conditions and any buyer's fees or contributions added by the seller
- The completion period, which sets the deadline your finance has to meet
Which properties you can buy at a property auction
Auction lots range from tidy tenanted flats to derelict buildings, and auction finance can fund most of them because it lends against the asset and a clear exit rather than requiring a mortgageable, income-producing property from day one.
- Residential investment property, including tenanted or vacant flats and houses bought to let or to refurbish
- Commercial property such as shops, offices and units, and mixed-use buildings with flats over a commercial ground floor
- Land, whether with or without planning permission, held for development or resale
- Unmortgageable or uninhabitable property that a mainstream lender will not touch until it is repaired
That last category is where short-term finance earns its place. Many auction lots need work before they are lettable or mortgageable, and a bridge funds the purchase and often the refurbishment, then repays when the property is finished and refinanced or sold. If the plan is to improve and hold, our refurbishment route at /services/refurbishment-to-stabilisation/ and the companion guide at /blog/refurbishment-bridging-loans/ set out how the works are funded.
Auction finance rates and fees
Auction finance is priced like other bridging: interest is charged monthly and the headline rate reflects the leverage, the property and your experience. Indicatively, bridging interest is around 0.95 percent per month, with rates commonly quoted between 0.55 and 1.25 percent per month, plus an arrangement fee of around 1 to 2 percent of the loan. These figures are illustrative and not an offer of credit.
| Cost | Indicative level |
|---|---|
| Monthly interest | Around 0.95 percent, commonly 0.55 to 1.25 percent |
| Arrangement fee | Around 1 to 2 percent of the loan |
| Loan to value | Commonly up to 70 to 75 percent of value |
| Valuation and legal fees | Payable by the borrower |
| Exit fee | Charged by some lenders, not all |
Auction buyers are part of a large and growing short-term lending market. The BDLA put the UK bridging and development loan book at a record 13.7 billion pounds as at Q3 2025, up 51.6 percent year on year, and recorded 11.7 billion pounds of applications in Q4 2025, which points to steady appetite among lenders for auction and other time-critical purchases. You can model the interest, fee and exit on a specific lot at /calculators/bridge-cost/.
Your exit strategy: refinance or sale
Every bridge needs a credible exit, and auction finance is no different. There are two routes. The first is a refinance: once the property is let or ready, the short-term loan is repaid by a longer-term facility, such as a buy-to-let or commercial investment mortgage. We arrange that hand-off through bridge to term finance at /services/bridge-to-term-finance/, so the exit is planned before you bid rather than scrambled afterwards.
The second is a sale: you buy, add value or simply resell, and repay the bridge from the proceeds. Whichever route fits, the exit should be decided before the auction, because a lender assesses the loan on how it will be repaid, not only on the purchase. A weak or vague exit is the most common reason an otherwise sound auction bid cannot be funded in time.
How we arrange an auction purchase
We work backwards from the completion date. Ahead of the sale we agree a decision in principle, brief a valuer, and confirm the deposit and fees you will need, so that when the hammer falls the facility can move straight to completion. We are an arranger and introducer, not a lender, and we place each auction purchase with the funder whose speed and appetite fit the lot. We arrange auction finance across the UK, and local market data sits at /locations/.
Stabilisation Finance arranges commercial finance for businesses, investors and experienced borrowers, and this lending is unregulated. Bridging secured on a borrower's own home is a regulated mortgage contract overseen by the Financial Conduct Authority, and where a transaction would require FCA authorisation we refer it to a regulated firm. Our core short-term facilities sit at /services/stabilisation-bridge-finance/ once the purchase completes and the asset moves toward a stabilised income.
Auction finance explained: common questions
What is auction finance?
Auction finance is a short-term bridging loan arranged to buy a property at auction, where the sale is binding at the fall of the hammer and completion usually falls due within 28 days. It funds the balance after your deposit, is secured against the lot, and is repaid by a refinance or sale. We arrange it for commercial and investment buyers; it is unregulated commercial lending, not a consumer mortgage.
Can I borrow money for an auction property?
Yes. You can borrow against an auction property through a bridging facility, typically up to around 70 to 75 percent of the value, with the deposit and fees funded from your own resources. Because a mainstream mortgage rarely completes inside the auction deadline, most buyers use auction finance and then refinance onto longer-term debt or sell once the property is ready.
What is the 10 minute rule at auction?
There is no formal 10 minute rule in a property auction. The point that matters is the fall of the hammer: at that moment the contract exchanges and you are legally committed to buy, pay the deposit on the day, and complete by the date in the catalogue, commonly 28 days later. Because the commitment is immediate and binding, your finance needs to be arranged before you bid, not after.
Who typically uses auction finance?
Property investors, landlords, developers and businesses buying at auction, especially where the lot needs work, is unmortgageable in its current state, or has to complete faster than a mortgage allows. It suits buyers who have a clear exit, whether a refinance onto a term loan or a sale, and who need certainty of funds by the completion date.
How much deposit do I need at auction?
Usually 10 percent of the purchase price is payable on the day, at the fall of the hammer, with the balance due on completion. Auction finance funds the balance, not the deposit, so you should have the 10 percent and the fees available from your own funds before you bid.
How quickly can auction finance complete?
It is built to complete inside the auction deadline, commonly 28 days and sometimes as little as 14. The way to hit that is preparation: a decision in principle before the sale, the legal pack reviewed, and a valuation instructed early, so the facility can be drawn as soon as the price is agreed.
What are auction finance rates?
Auction finance is priced like other bridging. Interest is charged monthly, indicatively around 0.95 percent and commonly quoted between 0.55 and 1.25 percent per month, plus an arrangement fee of around 1 to 2 percent. Valuation and legal fees are payable by the borrower. All figures are indicative and not an offer of credit.
Can I use auction finance for an unmortgageable property?
Yes, and it is one of the most common reasons to use it. Bridging lends against the asset and a clear exit rather than requiring a mortgageable property from day one, so it can fund a lot that needs repair or conversion. The bridge is then repaid once the work is done and the property is refinanced or sold.
Funding a scheme through stabilisation?
Send us the scheme and the numbers and we will come back with a view on fundability and likely terms within one working day.