How Bridging Loans Work: Rates, Fees & Exit Underwriting

In the fast-paced world of property development and real estate investing, opportunities do not wait for standard bank underwriting. A deal at a property auction or a time-sensitive renovation project can fall through if you have to wait 60 to 90 days for a traditional mortgage.

This is where Bridging Loans (or bridging finance) come into play. A bridging loan is a short-term, asset-backed loan designed to "bridge" a financial gap until long-term refinancing or a sale is executed. Because speed is the primary value proposition, bridging lenders can close deals in as little as 5 to 14 days. However, this speed comes with unique fee structures and higher interest rates.

Core Mechanics of Bridging Finance

Unlike typical amortizing home loans, bridging loans are almost always interest-only and have a short duration, usually ranging from 1 to 24 months.

Because these loans are intended for short-term situations, lenders focus heavily on the property's value (Loan-to-Value, or LTV) and the viability of the borrower's Exit Strategy rather than their monthly debt-to-income (DTI) ratio.

Interest Repayment Models

Lenders structure how bridging interest is paid in three distinct ways, depending on the borrower's cash flow requirements:

1. Serviced Interest

The borrower pays interest monthly, just like a standard interest-only mortgage. This keeps the loan balance flat but requires the borrower to demonstrate monthly income or corporate cash flow to cover the payments.

2. Rolled-Up Interest (Accumulated)

No monthly payments are made. The monthly interest charges are calculated and added directly to the loan balance (rolled up). The entire accumulated debt (principal plus all interest) is paid off in one lump sum at the end of the term. This is ideal for developers who have no revenue coming from the property during a heavy renovation phase.

3. Retained Interest

The lender calculates the total projected interest for the duration of the loan upfront and holds it back from the initial cash payout. For example, if you borrow $200,000 and the interest is $2,000 per month for a 12-month term, the lender retains $24,000 at day one and pays you a net amount of $176,000.

Note: If you pay off a retained interest loan early (e.g., in month 6), most reputable bridging lenders will rebate the remaining unused interest.

Bridging Loan Fees Breakdown

When calculating the total cost of bridging finance, looking at the interest rate alone is a major mistake. Bridging loans carry heavy transactional fees:

• Facility / Arrangement Fee: An upfront fee charged by the lender to set up the loan. This is typically 1% to 2% of the gross loan amount and is usually added to the loan balance.
• Exit Fee: Some lenders charge a fee when the loan is repaid, typically 0.5% to 1% of the loan amount. Many modern lenders have eliminated exit fees, so check the terms carefully.
• Broker Fees: Commercial mortgage brokers typically charge a fee of 1% to 1.5% of the loan amount to source the bridge facility.
• Valuation & Legal Fees: The borrower must pay for the lender's surveyor to value the property and pay both their own legal fees and the lender's legal fees.

Exit Underwriting: The Key to Approval

A bridging lender will not approve your loan without a clearly defined, realistic Exit Strategy. Because the loan must be repaid in full within a year or two, the lender must know exactly where that lump sum is coming from.

A Mathematical Example: Stretches and Fees

Let’s model a typical 12-month rolled-up interest bridging loan:

• Gross Loan Principal: $150,000
• Upfront Facility Fee (2%): $3,000 (added to loan, so total starting balance is $153,000)
• Monthly Interest Rate: 1.00% (12% per annum)
• Admin / Legal / Valuation Costs: $4,000 (paid out of pocket)

Let’s calculate the interest accrued over a 9-month hold period before you refinance:

Monthly Interest = $153,000 × 0.01 = $1,530 per month

Total Rolled-Up Interest (9 Months) = $1,530 × 9 = $13,770

Total Repayment Amount = $153,000 (starting balance) + $13,770 (interest) = $166,770

Adding the out-of-pocket costs, your total expense to use this capital for 9 months was $20,770 ($3,000 arrangement fee + $13,770 interest + $4,000 out-of-pocket costs).

Closed vs. Open Bridging Loans: Key Differences

The most important structural distinction in bridging finance is whether the loan is closed or open. This affects both the rate you are offered and the lender's risk appetite:

Full Cost Example: £300,000 Open Bridge, 6 Months, Rolled-Up

Here is a worked breakdown of what a rolled-up (retained interest) bridging loan actually costs, using typical UK market rates:

This example illustrates why rolled-up bridging loans appear lower-cost per month on the surface, but compound interest on the retained fees can add thousands to the final repayment balance compared to a serviced (monthly paid) model.

UK Bridging Lender Landscape

UK bridging finance is dominated by specialist non-bank lenders and challenger banks. Unlike mortgages, bridging loans are not regulated by the Financial Conduct Authority (FCA) when used for investment purposes (they are only regulated for owner-occupied properties). Key lenders and categories include:

• Specialist Bridgers: Shawbrook Bank, United Trust Bank, MT Finance, Together Money, Precise Mortgages
• Private Development Finance: Octane Capital, Titlestone, Maslow Capital (for larger development projects)
• Challenger Banks: Paragon Bank, West One Loans, Cambridge & Counties Bank
• Brokers / Packagers: Most investors access bridging finance through a specialist mortgage broker who sources across the entire market and can negotiate bespoke rates for experienced borrowers.

Last reviewed: August 2026 · Sources: Association of Short Term Lenders (ASTL); West One Bridging Index 2026; FCA MCOB (Mortgage Credit Directive); AssetCalcs UK market research.