Bridging finance is expensive by mortgage standards, but often the only way to fund a below market value deal fast enough. Here’s how it works, what it costs, and when to skip it.
Bridging finance is short-term, asset-secured lending. It’s expensive by mortgage standards, but cheap next to the cost of watching a genuine below market value (BMV) deal slip away because you couldn’t fund it fast enough. For investors buying BMV property, it’s often the only product on the market that moves at the speed the discount demands.
What Bridging Finance Actually Is
A bridging loan is short-term debt, typically 1 to 24 months, secured against a property. It bridges the gap between needing to buy now and being ready to secure long-term finance, sell another asset, or finish a refurbishment. The lender takes a legal charge over the property and lends against a percentage of its value, usually 65 to 75% loan-to-value (LTV).
Rates are quoted monthly, not annually, which is worth remembering the first time you see the number. Most bridging deals run 6 to 18 months, with two-year products the exception. Lenders care far less about your income than a buy-to-let (BTL) mortgage lender does. What they care about is the asset and the exit.
Why BMV Deals Often Need Bridging Finance
There are three reasons, and they usually hit at the same time.
Speed of completion. Auction purchases demand completion within 28 days of the gavel falling. Probate sales and motivated-seller deals often run on similarly tight clocks. A standard BTL mortgage takes 6 to 10 weeks from application to drawdown. Bridging can fund in 2 to 3 weeks, sometimes faster.
Properties that don’t mortgage. Plenty of BMV stock, auction lots especially, comes with no working kitchen, no working bathroom, no central heating, structural issues, or a short lease. Standard BTL lenders need the property “mortgageable” at completion. Bridging lenders don’t blink at this, because their exit assumes the property gets brought up to standard during the loan term.
Refurbishment finance. Most BMV deals need capital spend between purchase and refinance. Bridging products typically fund both the purchase price and a slice of the refurbishment cost, drawn down in stages as the work progresses.
Typical Bridging Finance Costs and Terms
Bridging costs more than mortgage debt, there’s no way around that. Indicative 2026 figures:
- Monthly interest rate: 0.7% to 1.2% per month (roughly 8.5% to 14.5% annualised
- Arrangement fee: 1.5% to 2.5% of the loan amount
- Exit fee: 0% to 1.5% (lender-dependent)
- Legal fees: you’ll cover the lender’s solicitor as well as your own, budget £1,500 to £3,000 combined
- Valuation fee: typically £400 to £1,500, depending on property value
- LTV: 65 to 75% of open market value (sometimes 70% of purchase price plus 100% of refurbishment cost)
- Term: 1 to 24 months, usually with no early redemption charge past the first 3 months
Run the numbers: a £100,000 bridging loan at 1% a month with a 2% arrangement fee costs roughly £14,000 in interest and fees over 12 months. Set that against a genuine 20% BMV discount on a £150,000 property, a £30,000 spread, and the bridging cost eats half of it, leaving the other half as your margin. The maths only work when the discount comfortably clears the cost of capital. If it doesn’t, walk away.
The Exit Strategy Is the Deal
Every bridging lender’s first question is how you’re getting out. Bridging is short-term money, and the lender wants a credible plan for getting repaid, not a hopeful one.
Two exits dominate BMV bridging:
- Refinance to a long-term BTL mortgage, once the property is mortgageable and you’ve held it long enough to satisfy the new lender’s seasoning rules, typically 6 months from purchase. The new mortgage clears the bridge.
- Sale, the “flip” strategy, where you refurbish and resell at open market value, and the sale proceeds clear the bridge.
If the exit isn’t credible, the lender won’t lend, full stop. And if you can’t execute the exit on schedule, the bridge rolls into default-interest territory, rates double or worse, and that legal charge stops being theoretical.
When Bridging Finance Is the Wrong Choice
Not every BMV deal needs it. If the property is mortgageable at completion, take a standard BTL mortgage and skip the bridging cost entirely, there’s no reason to pay for speed you don’t need.
Second check, and it’s non-negotiable: if the BMV discount doesn’t comfortably clear the all-in bridging cost (interest, fees, legals, valuation) the deal stops being BMV the moment the financing is paid for. Run the maths on the all-in cost. Always the all-in cost, never the headline price.
What This Looks Like in Practice
Many of the small-portfolio opportunities on Investment Oracle are built to be bought with bridging, auction lots, refurbishment plays, and quick-completion vendor deals, then refinanced into long-term BTL once the property’s held. Our partner network includes specialist bridging brokers who structure the debt to fit the deal, not the other way round.