Auction finance and bridging loans

Auction finance is short-term lending used to complete a property bought at auction within the deadline set by the sale. It is usually a bridging loan secured on the auction property, and sometimes on other property too. The loan runs for months rather than years and is repaid by selling the property or by refinancing.

At a traditional auction the buyer exchanges contracts when the hammer falls and pays a deposit of at least 10% on the day, with completion due 20 business days later unless the special conditions say otherwise (RICS Common Auction Conditions, 4th edition, accessed 20 Oct 2026). A standard mortgage can be hard to arrange in that time, which is why short-term lending is common.

An auction bridging loan is agreed in principle before the auction, then the lender values the lot and its solicitors check the legal pack after the sale. Money is released on completion, and interest is often rolled up or retained, so there is no monthly payment, although some loans are serviced with monthly interest instead.

The loan is secured with a first charge on the auction property. Where the deposit or the loan-to-value is a stretch, some lenders take a second charge on another property the buyer owns, which can raise the amount available.

Bridging used for auction purchases works in the same way as other bridging loans. How bridging is priced and arranged in general is covered in the bridging loans section, including fast completions and refurbishment cases.

Lenders check the lot, the legal pack and the buyer. The valuation shows what the property is worth now and, for refurbishment cases, after the work. The legal pack shows the title, searches, leases and any special conditions, including extra fees the buyer must pay, which can change how much cash the purchase needs.

Lenders also look at the buyer's experience, assets, credit history and other borrowing. A buyer who has refurbished or let property before usually finds more lenders, and a clear budget for any works helps the case.

Every auction loan needs a clear exit, meaning how it will be repaid. The two usual exits are selling the property, often after refurbishment, and refinancing onto a buy-to-let, commercial or residential mortgage once the property qualifies. Lenders want evidence that the exit is realistic within the loan term.

Refinancing is simplest when the property will be mortgageable after the works, for example once a kitchen and bathroom are installed. Some mortgage lenders set a minimum time of ownership before refinancing at a new value, so checking their rules before bidding avoids a gap at the end of the bridge.

Where the exit is a buy-to-let mortgage, the rent needs to support the new loan. How landlord lending is assessed is explained in the buy-to-let mortgages section.

Many auction lots are sold because they cannot be bought with a standard mortgage, for example a home without a working kitchen or bathroom, a property with structural problems or a short lease. Auction finance can fund these, as lenders value the property as it is and look closely at the cost and timetable of works.

Light refurbishment, such as decoration and new fittings, is financed by more lenders than heavy works involving structural changes or planning. Some loans release extra money for the works in stages, after a surveyor confirms progress, so the budget and schedule need to be realistic from the start.

Auction finance is priced like bridging. Interest is usually quoted monthly, and arrangement, valuation, legal and exit fees add to the cost. Pricing depends on the loan-to-value, the lot, the buyer's experience and the exit. Rates change often, so a dated quote on the specific lot is the only reliable guide to cost.

Because the loan is short, fees can matter as much as the rate. Comparing offers on the total cost over the expected term gives a fairer view, and how pricing is set is explained on the auction finance rates page.