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
Buyers routinely underestimate how compressed this is. From hammer to keys, the sequence runs as follows.
Day 0 – Contracts Exchanged
The hammer falls, you hand over 10%, and contracts exchange there and then. That signature turns completion into a legal obligation rather than an intention. Twenty-eight days, starting now.
Days 1 to 3 – Decision in Principle
Your broker puts the case to lenders. Where the relationships are direct and the broker knows which lenders genuinely operate at auction pace, terms come back inside 24 to 48 hours. Approach the wrong lender and you burn days you have no way of recovering. Understanding your exit before day one is essential – see our guide on when bridging is used too early.
Days 4 to 14 – Valuation and Legal Pack
A RICS surveyor gets instructed while the lender’s solicitors work through the auction legal pack. Delays cluster here. Restrictive covenants, absent searches, defective title: any one of them adds five to ten days. Where the pack was read before bidding, none of it arrives as a surprise and the timeline already accounts for it.
Days 15 to 21 – Formal Offer
The valuation comes back acceptable and the facility letter follows. By this stage your solicitor should be deep in the file, not opening it.
Days 22 to 28 – Funds and Completion
Money lands in your solicitor’s client account, the purchase completes, the property is yours. The clock on your exit starts the same day.
Example Auction Deal
Here is how the numbers look on a semi-commercial auction purchase at standard market leverage.
| Detail | Amount |
| Purchase price (auction) | £320,000 |
| Deposit paid on auction day (10%) | £32,000 |
| Balance of equity due at completion | £48,000 |
| Total borrower contribution (25%) | £80,000 |
| Loan required | £240,000 |
| Loan-to-value | 75% |
| Interest rate | 0.72% per month (rolled up) |
| Term | 9 months |
| Monthly interest (rolled) | £1,728 |
| Total interest (9 months) | £15,552 |
| Arrangement fee (1.5%) | £3,600 |
| Total cost of bridge | £19,152 |
| Exit strategy | Refinance onto BTL mortgage |
Two separate deposit figures matter here and buyers regularly confuse them. The 10% is what the auction house takes on the day, immediately after the hammer falls. The remaining 15% is due at completion alongside the loan drawdown. Budgeting only for the auction-day figure is one of the more common ways a purchase falls apart in week three.
Interest is rolled up, so there are no monthly payments during the term. Everything is repaid at exit alongside the capital. This is standard for auction bridging and keeps cash available for refurbishment or running costs through the hold period.
The gross development value after light refurbishment is £460,000. Refurbishment is estimated at £35,000. After bridge costs and works, net profit comes to roughly £85,800 before sale costs and tax.
The exit also stacks up on its own terms. Refinancing £240,000 against a £460,000 valuation puts the buy-to-let mortgage at 52% loan-to-value, which sits comfortably inside standard lending appetite rather than relying on a stretched refinance to bail the deal out.
The numbers work because the deal was structured correctly from the start – right lender, right leverage, right exit. Change any one of those and the margin compresses quickly.
Figures are illustrative and not a quotation.
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 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. Our bridging loan calculator gives you a working figure to build from.
Properties Suitable for Auction Finance
Auction finance covers a wide range of property, which is part of why it works where conventional lending does not.
Residential stock, whether tenanted, vacant, or needing refurbishment or conversion. Commercial premises including offices, retail units, warehouses and mixed-use buildings. Land with or without planning permission, which suits developers buying ahead of a consent decision. Unmortgageable property – short leases, structural defects, or buildings not currently habitable. And buy-refurbish-sell or purchase-to-develop projects where the asset only becomes mortgageable after the works.
If a property does not meet the standards of conventional lenders, auction finance from Commercial Finance Network can still make the purchase possible.
Who Uses Auction Finance
Property investors and landlords buying to expand a portfolio, where cash-ready funding is what wins the lot. Developers securing sites or run-down buildings with clear potential. Businesses purchasing their own trading premises below market value. And first-time bidders entering the market who need the finance question settled before they raise a hand.
Experience affects your terms rather than your eligibility. A first bridge is entirely workable when the case is presented properly.
What You Need to Apply
Property details
The legal pack, auction guide price and property type.
A documented exit
A clear plan to refinance, sell or hold, with supporting evidence – a rental appraisal for a buy-to-let exit, an agent’s estimate for a sale.
Borrower profile
Financial history, credit record and any relevant experience. Credit issues narrow the lender pool rather than closing it.
Deposit funds
The auction house takes 10% of the purchase price on the day. You will generally need 25% to 30% in total once the loan completes, so plan for the balance as well as the day-one payment. Failing to complete within the agreed timeframe means losing the auction-day deposit, which is why the full funding position needs settling before you bid.
Why Choose Commercial Finance Network for Auction Finance
As a leading auction finance broker working with clients across the UK and internationally, we offer more than just access to lenders – we deliver solutions.
Whole-of-Market Access
We work with an extensive panel of auction finance lenders, including high-street banks, specialist lenders, and private funders.
Speed and Certainty
Fast decisions and seamless processing mean you are never left waiting or second-guessing your purchase.
Expert Brokers
Our CeMAP-qualified advisers have many years of experience securing competitive bridging rates under tight auction deadlines.
Bespoke Deals
Every project is different. We tailor your funding terms to suit your timeline, risk appetite, and exit strategy.
Transparency
No hidden costs. No pushy sales. Just honest, impartial advice built around your needs.
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.
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 us: +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
- Refurbishment Loans – short-term finance for post-auction property improvements before refinancing onto a longer-term mortgage
- Commercial Land Mortgage – specialist funding for land lots purchased at auction with or without planning permission
- Buy-to-Let Mortgages – the most common longer-term exit from auction bridging finance once a property is tenanted and mortgageable
- Bridging Loan Exit Strategies – how to plan and structure your exit from auction bridging finance before you bid
- Bridging Loan 75% LTV – what needs to be in place to access maximum leverage on a bridging loan and which lenders will go there