What to Have in Place Before You Bid — and Why Most Deposits Get Lost Without It
The moment the hammer falls at auction, the clock starts. You have 28 days to complete or you lose your 10% deposit – and the seller can pursue you for any additional losses on top of that.
A standard mortgage cannot move in that timeframe. A bridging loan can.
Auction bridging finance starts from 0.55% per month for clean residential cases. Decisions in principle are available within 24 to 48 hours. Loan sizes run from £50,000 to £10 million, up to 75% LTV on most cases.
This page covers exactly how the process works, what the numbers look like on a real deal, where things go wrong, and what you need to have in place before you bid.
How Auction Bridging Works
The timeline is tighter than most buyers expect. Here is what happens from hammer to completion.
Day 0 – Contracts Exchanged The hammer falls. You pay a 10% deposit on the day and exchange contracts immediately. You are now legally obligated to complete. The 28-day clock is running. Understanding your exit strategy before day one is essential – see our guide on when bridging is used too early.
Days 1 to 3 – Decision in Principle A specialist bridging broker submits your case to lenders. A decision in principle can come back within 24 to 48 hours – but only where the broker has direct lender relationships and knows which lenders are set up to move at auction speed. Go to the wrong lender at this stage and you lose days you cannot afford to lose.
Days 4 to 14 – Valuation and Legal Pack Review The lender instructs a RICS surveyor and their solicitors review the auction legal pack. This is where most delays happen. Title issues, missing searches, restrictive covenants – any of these can add five to ten days to the timeline. If your broker has reviewed the legal pack before auction day, most of these are already known and priced in.
Days 15 to 21 – Formal Offer Subject to a satisfactory valuation, the lender issues a formal facility letter. Your solicitor should be actively working the case by this point – not being instructed for the first time.
Days 22 to 28 – Funds Released and Completion Funds transfer to your solicitor’s client account. The purchase completes. You own the property. The clock on your exit strategy starts now.
Example Auction Deal
Here is how the numbers look on a real semi-commercial auction purchase.
| Detail | Amount |
| Purchase price (auction) | £320,000 |
| Deposit paid on auction day (10%) | £32,000 |
| Loan required | £288,000 |
| Loan-to-value | 90% (of purchase) / 70% of GDV |
| Interest rate | 0.72% per month (rolled up) |
| Term | 9 months |
| Monthly interest (rolled) | £2,074 |
| Total interest (9 months) | £18,662 |
| Arrangement fee (1.5%) | £4,320 |
| Exit strategy | Refinance onto BTL mortgage |
| Total cost of bridge | ~£22,982 |
Interest is rolled up – no monthly payments during the term. Everything is repaid at exit alongside the loan. This is standard for auction bridging and keeps cash available for refurbishment or running costs through the hold period.
The GDV after light refurbishment is £460,000. Net profit after bridge costs and refurbishment (estimated at £35,000) comes to around £102,000. That return is difficult to match with most buy-to-let strategies within a 12-month window.
The numbers work because the deal was structured correctly from the start – right lender, right LTV, right exit. Change any one of those and the margin compresses quickly.
What Can Go Wrong
Most auction bridging problems are foreseeable. Almost all of them are preventable if you know what to look for before you bid.
Valuation Shortfall You paid £300,000 at auction. The lender’s valuer comes back at £265,000. Your loan is now calculated on the lower figure – leaving a £25,000+ funding gap you need to cover from your own pocket or lose your deposit. This happens more often than buyers expect, particularly on properties in poor condition or in locations with limited comparable sales. An independent pre-auction valuation removes the surprise.
Legal Pack Problems Auction legal packs regularly contain restrictive covenants, missing searches, or title defects. Any of these can add five to ten days to the lender’s clearance process. On a 28-day deadline, a week’s delay puts completion at serious risk. A broker who reviews the legal pack before you bid identifies these issues in advance – and either prices them into your timeline or tells you to walk away.
LTV Limits Most bridging lenders cap at 70% to 75% LTV. If your auction deposit is only 10% of the purchase price, you need to find the remaining equity from somewhere. Buyers who do not plan for this before bidding find themselves in a funding gap on day one with no good options. If your application has already been declined, see our guide on bridging finance rejected due to title issues.
Wrong Property Type Bridging lenders will decline properties with structural issues, non-standard construction – steel frame, concrete, timber – or short leases under 70 years. Specialist lenders exist for these cases, but you need to know this before the hammer falls. Not after.
Wrong Solicitor A conveyancer used to 12-week residential completions will find a 28-day bridging completion extremely difficult. You need a solicitor with direct bridging experience who understands what lenders need and when they need it.
How to Move Fast
Speak to a bridging loan broker before the auction – not after. A broker with direct lender relationships can pre-qualify your position in hours and give you a real borrowing figure before you bid. Some will get a decision in principle before auction day. That number is what determines your maximum bid – not what you think the property is worth.
Get your documents together before the catalogue drops. AML checks take longer than most buyers expect. Lenders cannot instruct valuers or solicitors until identity is verified – typically 24 to 72 hours. Two forms of ID, three months of bank statements, evidence of deposit source, assets and liabilities statement, and a brief exit strategy summary. Have all of it ready before the auction date.
Review the legal pack before you bid. Download it. Read it. Flag anything unusual to your broker. Title defects and absent searches do not kill most deals – but they need to be in the timeline from day one, not discovered on day fifteen.
Use a solicitor with bridging experience. Instruct them before auction day. A solicitor who has never handled a 28-day bridging completion is a liability on a deal where every day counts.
Know your exit before you bid. Lenders want to see how they get their money back. Refinancing onto a buy-to-let or commercial mortgage? Have a rental appraisal ready. Selling? Have an agent’s estimate. Planning consent? Include it. The cleaner the exit evidence, the faster the offer.
Budget for the full cost – not only the rate. Arrangement fee, exit fee, valuation fee, legal costs on both sides. Build all of it into your maximum bid before you lift your hand. Before you bid – not after you have won.
Conclusion
Auction bridging finance works when it is set up before the hammer falls – not scrambled together after. The 28-day clock does not negotiate. Every day spent approaching the wrong lender, waiting on AML checks, or discovering a legal pack problem for the first time is a day closer to losing your deposit.
Get the structure right in advance. Know your borrowing limit. Have your documents ready. Review the legal pack. Instruct your solicitor. Then bid with confidence.
Frequently Asked Questions
Can I get a bridging loan for an auction property within 28 days?
Yes – but only if you move immediately after the hammer falls.
Documentation submitted on day one means most cases complete in 14 to 21 days. Every day lost in the first week is a day you cannot get back at the end.
What is the maximum LTV on an auction bridging loan?
Most lenders cap at 70% to 75% on auction transactions.
Some will go to 80% for experienced investors with strong balance sheets. The LTV is always calculated against the lower of the purchase price or the lender’s valuation – not what you paid if you overbid. That distinction catches a lot of buyers out.
What happens if I cannot complete within 28 days?
You lose your 10% deposit. No exceptions.
The seller can then resell and pursue you for any further losses if the resale price falls short of your bid. The 28-day deadline is a legal obligation, not a guideline. This is why the funding needs to be in place before you bid.
How much does auction bridging finance cost?
Rates start from 0.55% per month for clean residential cases at low LTV.
Commercial and mixed-use properties typically run between 0.75% and 1.2% per month. Always model the full cost including arrangement fee, exit fee, valuation, and legal costs on both sides. Use our bridging loan calculator to run the numbers on your specific deal.
Do I need previous bridging experience to qualify?
No – but it affects your terms.
First-time bridge borrowers can still secure competitive deals. Experienced investors with a track record tend to access better rates and higher LTVs because lenders can see how previous deals were handled and exited. If this is your first bridge, a broker who presents the case well makes a significant difference.
Can I use a bridging loan on a property that needs renovation?
Yes – refurbishment bridging is one of the most common uses of auction finance.
You acquire the property, bridge the purchase, carry out works, then refinance onto a buy-to-let or commercial mortgage once the property is tenanted or saleable.
Can I use bridging finance for commercial auction properties?
Yes – specialist bridging lenders regularly finance commercial and semi-commercial assets.
Offices, retail units, industrial, and mixed-use properties are all financeable. Rates run slightly higher than residential and the lender pool is smaller – a broker with commercial experience matters here.
Should I speak to a broker before or after the auction?
Always before.
A broker can review the legal pack, check lender appetite for the specific property type, give you a credible borrowing figure, and in many cases secure a decision in principle before auction day. Going in without that preparation is how deposits get lost.
Get Auction Bridging Terms Before You Bid
Most buyers who lose their deposit did not have their funding confirmed before they walked into the auction room. Some had a conversation with a bank. Some had a rough idea of what they could borrow. None of them had a decision in principle from a lender who actually does auction bridging.
That is the difference.
As a whole-of-market broker working with property investors and businesses across the UK and internationally, Commercial Finance Network is directly authorised and regulated by the Financial Conduct Authority. We work with specialist auction bridging lenders across the full market – including lenders who will not deal with buyers directly. Tell us the property, the auction date, and your exit strategy. We will come back with real terms, a full cost breakdown, and a clear recommendation – usually before auction day.
Call: +44 1494 622 111
Email: info@cfnuk.com
Bridging finance is not regulated by the FCA in all circumstances. Your property may be repossessed if you do not keep up repayments on a loan secured against it.
Related Pages
- Auction Finance – whole-of-market auction finance service covering all property types and deal sizes across the UK
- Refurbishment Loans – bridging and short-term finance for light and heavy refurbishment projects post-auction
- Bridging Loan Exit Strategies – a guide to the main exit routes lenders expect and how to evidence them before you apply
- How Much Can I Borrow on a Bridging Loan? – LTV ranges, deal examples, and what lenders actually assess when sizing a bridging facility