What is auction finance?
Auction finance is fast, short-term lending used to complete a property bought at auction, usually within the standard 28-day completion deadline. It is typically a form of bridging finance arranged to move at auction speed. When you win a lot, the clock starts immediately — so auction finance exists to get funds in place before completion day, after which you often refinance onto a longer-term facility. Assesr packages and places these deals fast as part of its specialist finance coverage.
How the auction timeline works
Understanding the deadline is the whole point. At most UK property auctions:
- You exchange on the fall of the hammer. The moment you win, you are legally committed — there is no cooling-off period.
- You pay a deposit on the day, usually 10% of the purchase price.
- You must complete within 28 days (some auctions use 20 working days or other terms — check the specific auction).
- If you fail to complete, you can lose your deposit and may face further liability.
That 28-day window is why a standard mortgage often will not work — it is simply too slow, especially for the kind of properties that sell at auction.
Why standard mortgages struggle at auction
Two reasons. First, timing: a standard mortgage can take weeks to arrange, and there is no room for delay against a hard 28-day deadline. Second, condition: auction properties are often un-mortgageable in their current state — they need refurbishment, have short leases, or have title quirks. A mainstream lender will not lend on a property that fails their condition criteria. Auction finance and bridging are built to fund these situations quickly, with the refurbishment or fix happening afterwards.
What lenders need for auction finance
Because speed is everything, the deal has to be ready before you bid, not after. Lenders will want:
- The property details and legal pack. Auction legal packs are published in advance — get yours reviewed early.
- Your deposit and completion funds picture. How the 10% and the balance are covered.
- A clear exit. Sale, or refinance onto a buy-to-let or commercial mortgage — the same exit discipline as any bridge.
- Your experience, especially if the plan involves refurbishment or conversion.
The winning move is to have all of this packaged into a lender-ready credit paper before the auction — see what a credit paper is — so finance is in principle before you raise your hand.
How much does auction finance cost?
Auction finance is priced like bridging — monthly, because the term is short. Expect broadly the same shape: a monthly interest rate, an arrangement fee of around 1–2%, and valuation and legal costs. See the cost section of our bridging finance guide for the detail. As always, confirm current figures with a lender; the priority at auction is certainty and speed, not shaving basis points.
How to avoid losing your deposit
Losing a 10% deposit is the nightmare scenario, and it is avoidable. The rules:
- Arrange finance in principle before you bid. Never bid hoping the money will come together in 28 days.
- Read the legal pack early. Title issues, short leases and covenants can all derail completion — find them before, not after.
- Know your maximum bid based on what your finance and the numbers support, and stick to it.
- Use a lender or platform that moves at auction speed, with the deal already packaged so there is no scramble.
The role of packaging and matching
Auction finance is the clearest case for good packaging and mandate-matching. You do not have time to shop a raw enquiry around a dozen lenders during a 28-day window. You want the deal packaged into a credit paper and routed straight to the specialist lenders whose mandate covers auction and bridging deals — see how mandate-matching works. Assesr does exactly this: a lender-ready credit paper in about 60 seconds, matched to the right lenders, for a 0.5% fee on drawdown only and free to submit. Doing that before the auction is how you bid with confidence.
After completion: refinancing out
Auction finance is a stepping stone, not a destination. Once you have completed and done any planned works, you refinance onto a longer-term facility — a buy-to-let mortgage if you are holding the property to rent, a commercial mortgage if it is a commercial asset, or a sale if you are flipping. Planning that exit before you bid is what makes the whole strategy work.
Frequently asked questions
What is auction finance?
Auction finance is fast, short-term lending used to complete a property bought at auction, usually within the standard 28-day completion deadline. It is typically a form of bridging finance arranged to move at auction speed.
How quickly do you have to pay for an auction property?
At most UK auctions you exchange on the fall of the hammer and must complete within 28 days, having paid a deposit — usually 10 percent — on the day. Missing completion can mean losing that deposit.
Can you get a mortgage on an auction property in 28 days?
A standard mortgage is often too slow for a 28-day deadline, especially for properties needing work. Auction finance or bridging is designed to complete inside that window, then be refinanced afterwards.
How do you avoid losing your deposit at auction?
Arrange finance in principle before you bid, get the legal pack reviewed early, and use a lender or platform that can move at auction speed. Packaging the deal well before the hammer falls is the key.