Bridging finance cost in a UK property chain (2026)

When a buyer further down a property chain pulls out a week before exchange, the seller above them faces a choice: collapse the chain and start again, or borrow short-term to complete the onward purchase before the sale of the old home goes through. That short-term loan is called a bridging loan, and it is the most expensive line item most upsizers will ever come across in writing.

This is a factual walk-through of how the cost is structured: the monthly interest, the arrangement fee, the legal and valuation charges, and how those compound across a typical 2-, 4- and 6-month bridge on a £150,000 loan. It is not advice on whether to use bridging. Speak to a qualified mortgage adviser before acting.

What bridging finance is, in plain terms

A bridging loan is a short-term, interest-only, secured loan, typically taken for 1-18 months, secured against either the property being bought or the property being sold. Two regulatory categories exist:

• Regulated bridging — where the security property is, or will be, occupied by the borrower or an immediate family member. This is regulated by the Financial Conduct Authority under the Mortgage Conduct of Business sourcebook (MCOB), with the same affordability and disclosure rules as a residential mortgage.
• Unregulated bridging — buy-to-let, commercial, or non-residential security. Outside FCA scope, though the lender itself may still hold FCA permissions for other activities.

The Association of Short Term Lenders (ASTL) is the trade body whose members account for the bulk of UK bridging volume. ASTL publishes quarterly aggregate statistics covering completions, loan book size, average loan-to-value and average term. Bridging Trends, a separate quarterly publication produced by MT Finance, tracks similar industry-wide figures.

The three cost components

A bridging loan has three layers of cost. None of them are mortgage-rate-equivalent — all three must be added together to compare a bridge to a mortgage.

1. Monthly interest. Quoted as a percentage per month, not per year. Per ASTL aggregate data covering 2024, average monthly bridging rates across the regulated and unregulated market clustered around 0.85% to 1.00% per month for first-charge loans at sensible LTVs. That is roughly 10-12% expressed annually — about 2.5 times the Bank of England's quoted 75% LTV 5-year fixed mortgage rate, which sat at 4.32% as of 1 April 2026 (BoE Bankstats Table A5.7).

2. Arrangement fee. Charged once, at drawdown, typically 1.5% to 2.0% of the loan amount. Sometimes called a "facility fee" or "lender fee". Usually deducted from the gross loan advance rather than paid up-front in cash.

3. Legal and valuation costs. A solicitor must act for the lender (often the same firm acting for you, with dual representation). A RICS valuation is usually required. Combined, these typically run £1,200 to £2,500 on a residential bridge under £500,000, depending on property value and complexity.

A fourth cost — the exit fee — was common a decade ago but is rare on regulated bridging in 2026; check the offer document.

Worked example: £150,000 bridge to save a chain

Take a typical upsizing scenario. You have agreed to sell your current home for £350,000 and buy the onward property for £500,000. The buyer below you delays. To complete on time you need to find £150,000 of short-term finance, secured against the new property as a first charge, with the loan repaid the moment your old home sells.

Using a mid-market rate of 0.85% per month, an arrangement fee of 1.5%, and combined legal and valuation costs of £1,500:

At the upper end of the market — 1.00% per month and a 2.0% arrangement fee:

A 6-month bridge therefore typically costs the borrower somewhere between £11,400 and £13,500 on a £150,000 loan. The same £150,000 borrowed on a 25-year residential mortgage at the current BoE quoted rate of 4.32% would carry roughly £540 of interest a month — so over 6 months the bridge costs around three times the equivalent mortgage interest, before any of the fees are added in.

How the interest is paid

Three structures are common, and the offer document will state which one applies:

• Retained (rolled-up) interest — the lender deducts the full interest charge for the agreed term from the gross advance. The borrower receives the loan net of all interest and makes no monthly payments. If the loan redeems early, the unused interest is refunded.
• Serviced interest — the borrower pays interest monthly, as with a mortgage. The lender will affordability-test this against income.
• Part-and-part — some interest retained, some serviced. Rare in pure residential bridging.

Most regulated residential bridges use retained interest, because the borrower's income is already committed to the existing mortgage on the property being sold.

Why the rate is so much higher than a mortgage

Three structural reasons sit behind the rate gap.

First, term certainty risk. A mortgage lender expects 25 years of cash flow; a bridging lender expects 6-12 months. The same fixed underwriting and origination cost is amortised over a much shorter income stream.

Second, exit dependency. The lender is not relying on the borrower's income to repay the loan — they are relying on a future event (the sale of the old home, or the completion of a refinance onto a residential mortgage). If that exit slips, the lender's capital is locked up. Pricing reflects that uncertainty.

Third, regulatory capital and funding mix. Many bridging lenders fund themselves through institutional credit lines or fund vehicles, both of which are more expensive than the retail deposit funding that backs high-street mortgages.

Lenders active in the UK market

Naming participants for context only, not as comparative judgement. Public lender directories and the ASTL members list show the following firms active in residential bridging in 2026:

• MT Finance — publishes the quarterly Bridging Trends industry report
• Octopus Real Estate — part of Octopus Group, regulated and unregulated bridging
• Together Money — long-established short-term lender, regulated and unregulated
• Shawbrook Bank — specialist lender, broker-distributed
• United Trust Bank — specialist short-term lending
• LendInvest — bridging and BTL term, broker-distributed

Each lender publishes a rate card via its broker channel; rates and fees vary materially by LTV, exit certainty and property type. A whole-of-market bridging broker holding FCA permissions can pull quotes across the panel.

How the loan is repaid

The "exit" is the specific way the bridge is cleared. The lender will require a clearly defined exit before drawdown. Two are typical for property-chain bridges:

1. Sale of the old property. The bridge is repaid in full from the net sale proceeds on completion. If the sale falls through, the lender may agree to extend, refinance, or in extremis exercise the security.
2. Refinance to a residential mortgage. The bridge converts onto a longer-term residential mortgage once an offer is in place. This is more common where the bridge was used to fund a renovation or chain-break and the borrower intends to keep the property.

A bridging loan with no clearly evidenced exit will typically not be offered by a regulated lender. If it is offered, the borrower should treat that as a warning sign.

How it interacts with stamp duty and SDLT

A bridge does not change the stamp duty position. The buyer still owes SDLT on completion of the purchase, calculated against the HMRC rates published on gov.uk. If at completion the buyer still owns the old home (because the sale has not yet completed), they fall inside the additional-property surcharge — 5% on the full price on top of the standard slabs. That surcharge is recoverable under the 3-year refund route if the old home is then sold within 36 months of completion (see Homecost's explainer on the additional-property surcharge refund route for the procedural detail).

In practice, this means a buyer using a bridge often has to fund the 5% surcharge on completion and reclaim it later from HMRC — adding a temporary cash-flow line on top of the bridging cost itself.

Pricing the bridge against the alternatives

Three alternatives most often considered alongside a bridge:

• Renegotiate the chain. Free, but uncertain — the chain may collapse anyway.
• Drop the asking price on the old home to attract a faster buyer. Quantifiable: a 3% price reduction on a £350,000 sale is £10,500. Often within range of the bridging cost itself.
• Delay the onward purchase. Free, but the upstream seller may withdraw, or the price may move.

None of these is universally cheaper than a bridge. The arithmetic depends on the size of the chain, the time to find a new buyer, and the seller's flexibility upstream.

What to ask the broker

If a regulated bridge is being considered, the offer document and Key Facts Illustration (KFI) must disclose:

• The headline monthly interest rate, and whether it is retained, serviced, or part-and-part
• The arrangement fee in pounds and as a percentage
• The legal, valuation, and any exit fees
• The maximum term and any extension provisions
• The penalty rate that applies if the loan over-runs the agreed term
• The specific exit on which the lender is underwriting

A regulated lender is required to provide this information in writing before completion. If any of it is unclear, that is a question for the broker, not a reason to proceed regardless.

Where bridging sits in the upsizing maths

For most upsizers, a bridge is the difference between losing the onward purchase and getting it across the line. For a typical 4-bed-to-5-bed move in England, the average price gap is around £278,000 — meaning the buyer is often unwilling to walk away from a long-searched-for home over a 6-week delay downstream. The same logic applies on a smaller scale for 3-bed-to-4-bed moves, where the upsize gap is smaller but the chain is often deeper.

The cost of bridging is not trivial — £6,000 to £13,500 on a £150,000 loan, depending on term and pricing — but it is a known, quantifiable cost. The cost of losing the onward purchase is unknowable.

Try the tool

To anchor the upsizing maths to a real area, run a postcode through the Homecost calculator for Manchester (M1 1AE) and compare the cost stack against a postcode in your target area. The tool surfaces the SDLT, council tax and energy lines that sit alongside the bridging cost.

For more cost guides across the buying process, see buyer guides on Homecost.

This article explains how bridging finance is priced and structured under FCA-regulated and unregulated frameworks in 2026. It is general information drawn from publicly published industry data (ASTL, Bridging Trends, BoE Bankstats and the FCA Handbook), and it does not constitute mortgage, tax or legal advice. Speak to a qualified mortgage adviser and a conveyancer before entering into any short-term lending arrangement.

Based on HM Land Registry pp-complete (30.9m transactions to date), Bank of England 75% LTV 5-year fixed quoted rate (4.32%, April 2026 Bankstats release), the Association of Short Term Lenders' publicly disclosed aggregate quarterly data, and the FCA Mortgage Conduct of Business sourcebook. Data accessed 23 May 2026.