Buying at auction is one of the fastest ways to secure a property, and one of the least forgiving if your finance isn't ready. Unlike a standard purchase, where you agree a price and then start arranging a mortgage, auction rules commit you to buy the moment the hammer falls, with a hard 28-day deadline to complete. Get your finance sorted beforehand, and auction buying can be genuinely straightforward. Get it wrong, and it can be an expensive lesson.
How auction timelines actually work
When you win a lot at auction, you're required to pay a deposit, usually 10% of the purchase price, on the day itself, and to exchange contracts immediately. Completion, meaning full payment of the balance and legal transfer of ownership, is then due within 28 days. There's no flexibility built into this timeline: it's set out in the auction's legal pack before bidding even starts, and it applies whether or not your mortgage has come through.
Why mortgages rarely work for auction purchases
A standard mortgage application, from initial enquiry to funds being released, typically takes somewhere between eight and sixteen weeks. That's simply incompatible with a 28-day deadline. Even a mortgage agreed in principle before the auction can fall through once full underwriting begins, particularly if the property has any of the issues that are common at auction: a short lease, non-standard construction, or works needed before it's habitable.
Arranging finance before you bid
The safest approach is to arrange your finance, or at least an agreement in principle, before auction day. This means you go into the room, or log into the online auction, knowing your maximum bid and having confidence that funds will be available if you win. A decision in principle from a bridging lender can typically be arranged within a day or two, based on the property details in the legal pack and your intended exit strategy.
It's worth speaking to a lender as soon as you've identified a lot you're interested in, rather than waiting until the week of the auction. This gives time to review the legal pack properly, flag anything unusual, and agree terms with enough breathing room that you're not finalising finance details in the same week you need to complete.
What lenders look at in the legal pack
Before confirming terms, a bridging lender will usually review the same legal pack you should be reading yourself: the title, any restrictive covenants, searches, and special conditions of sale. Anything unusual, such as a short lease, an overage clause, or a tenant already in situ, needs to be factored into both the valuation and your exit plan, so it's worth sharing the pack with your lender early rather than after you've already won the lot.
Setting your maximum bid
Once you know your finance is in place, work backwards from your total budget, including the loan costs, arrangement fees, and any refurbishment budget, to set a genuine maximum bid before the auction starts. It's easy to get caught up in the moment and bid past a figure that still makes financial sense once all the costs are added up, so having this number fixed beforehand, and treating it as non-negotiable, is one of the most useful disciplines an auction buyer can develop.
What happens after you win
Once you've exchanged and paid your deposit, the clock starts on your 28 days. From here, valuation and legal work should move in parallel rather than one after the other, since there's no slack in the timeline to do things sequentially. This is where the speed of a genuinely bridging-focused lender matters most: a lender used to standard mortgage timescales will struggle to complete in time, however good the underlying case.
Bidding remotely versus in the room
More auctions now run online or allow remote bidding, which changes the atmosphere but not the underlying deadline. Whether you're bidding in person or through a screen, the same discipline applies: know your number, know your finance is confirmed, and be prepared to stop once you've reached your limit, however tempting it is to chase a lot you've already invested time researching.
What if you don't win the lot
It's worth deciding in advance what happens to your finance arrangement if you're outbid. Most decisions in principle are valid for a set period and can often be carried over to a different lot in a later auction, so speak to your lender about how long an agreement stays valid if your first choice doesn't go your way.
Getting it right
Auction finance rewards preparation. The buyers who have the smoothest experience are almost always the ones who spoke to a lender before bidding, read the legal pack properly, and had a realistic exit strategy in mind before they raised their paddle. If you're considering an auction purchase and want to arrange finance in advance, get in touch and we can usually give you an indicative decision well before auction day.