UK Bridging Loan Calculator

Understanding the True Cost of Bridging Finance

Bridging finance is an incredibly powerful tool for property investors, developers, and homeowners looking to break a property chain. However, because it is a short-term, asset-backed lending product, the way lenders calculate costs is fundamentally different from a standard high-street mortgage.

Our bridging loan calculator is designed to provide radical transparency. Below, we break down exactly how the UK bridging market operates, how interest is applied, and the hidden fees you must consider before signing a credit agreement.

1. Net Loan vs. Gross Loan (The Golden Rule)

When you use our bridging loan calculator, you will notice two distinct loan amounts: the Net Loan and the Gross Loan. This distinction is the most important concept in short-term property finance.

• The Net Loan: This is the exact amount of cash you need transferred into your bank account (or to your solicitor) to complete your property purchase, pay for an auction property, or fund your refurbishment.
• The Gross Loan: This is the total debt you will owe the lender at the end of your term. It is calculated by taking your Net Loan, and adding the lender's facility fee (usually 2%) and the total interest for the duration of the loan.

2. Why is LTV Capped at 75%?

Loan-to-Value (LTV) is the metric lenders use to assess their risk. It represents the size of your loan compared to the value of the property acting as security.

In the UK bridging market, institutional lenders typically cap their maximum borrowing limit at 75% Gross LTV. It is vital to understand that this 75% limit applies to the Gross Loan, not the Net Loan. Because fees and retained interest are added to the loan balance on day one, your actual "cash in hand" (Net LTV) will usually max out around 68% to 70%.

If our calculator flags a warning that your LTV exceeds 75%, you will either need to inject a larger cash deposit into the transaction or provide a "second charge" over an additional property you own to satisfy the lender's security requirements.

How Bridging Loan Interest is Calculated

Unlike standard mortgages which quote annual percentage rates (APRs), bridging loans quote monthly interest rates. In the current 2026 market, unregulated bridging rates typically range from 0.75% to 1.5% per month, depending on your LTV, credit profile, and the nature of the asset.

There are two primary ways bridging interest is paid:

Retained (or Rolled-Up) Interest

This is the most common method and the default setting for our bridging loan calculator. With retained interest, you do not make any monthly payments. Instead, the lender calculates the total interest for the duration of the term (e.g., 12 months) and adds it to the loan upfront. When your term ends—either because you sold the property or refinanced—you pay back the principal and the retained interest in one lump sum.

This is highly advantageous for developers or auction buyers who will not have rental income to service monthly debt while a property is being refurbished.

Serviced Interest

With serviced interest, you pay the interest amount every single month, exactly like an interest-only Buy-to-Let mortgage. Because the interest is not rolled up into the loan balance, your Gross Loan is smaller, allowing you to access slightly more Net Capital on day one. However, lenders will require strict proof of personal or business income to ensure you can afford the monthly payments.

Standard Bridging Loan Fees Explained

Beyond the monthly interest rate, securing bridging finance involves several standard industry fees. Our calculator accounts for the primary lender costs, but you must also budget for third-party professional fees:

• Lender Facility Fee (Arrangement Fee): Almost universally set at 2% of the Gross Loan amount. This is the lender's primary profit margin for underwriting and arranging the facility, and is typically added to the loan balance.
• Valuation Fees: Because bridging loans are secured against physical assets, the lender will require a professional RICS (Royal Institution of Chartered Surveyors) valuation. For standard residential bridging, Automated Valuation Models (AVMs) are sometimes used to speed up the process, but commercial or heavy refurbishment loans will require a physical inspection. This fee is paid upfront by the borrower.
• Legal Fees: You are responsible for paying your own solicitor's fees, as well as the lender's legal fees. Depending on the complexity of the corporate structure (e.g., using an SPV limited company), legal fees can range from £1,000 to £3,000+.
• Broker / Packaging Fees: If you use a specialist broker to navigate the market and secure the best rates, they may charge a packaging fee, typically between 0.5% and 1.5% of the loan amount.

Regulated vs. Unregulated Bridging

When you unlock your quote on our calculator, we ask if you or a family member intend to live in the property. This determines the regulatory framework of your loan under the Financial Conduct Authority (FCA).

Regulated Bridging: If the property is, has been, or will be your primary residence, the loan is strictly regulated by the FCA to protect consumers. These loans require rigorous affordability checks and are usually strictly capped at a 12-month term.

Unregulated Bridging: If the loan is purely for commercial or investment purposes (such as Buy-to-Let properties, commercial units, or land development), the loan is unregulated. Because it is a business-to-business transaction, lenders have significantly more flexibility. They focus primarily on the viability of the asset and your exit strategy, rather than your personal income. Unregulated terms can often be extended up to 24 months.

The Importance of the Exit Strategy

Bridging finance is a temporary bridge, not a destination. No responsible lender in the UK will approve a short-term finance application without a watertight Exit Strategy. This is the mechanism by which you guarantee the lender will be repaid.

Common and acceptable exit strategies include:

• Selling the refurbished property on the open market.
• Refinancing the property onto a standard long-term mortgage (such as a Buy-to-Let or Commercial mortgage) once it is fully tenanted.
• Selling another unencumbered asset within your portfolio.

By understanding these mechanics and utilising our bridging loan calculator, you can approach lenders with confidence, knowing exactly how much your project will cost and ensuring your property investments are highly profitable.