How is the facility limit calculated — is it based on property value, equity, or rental income?
22nd May 2026
By Simon Carr
How is the facility limit calculated — is it based on property value, equity, or rental income?
When you apply for property-backed finance in the UK, such as a bridging loan or a secured loan, you will encounter the term “facility limit”. This figure represents the maximum amount of money a lender is willing to advance to you. However, the exact way lenders arrive at this figure can often seem complex. Borrowers frequently wonder if the calculation is based on property value, available equity, or rental income.
The simple answer is that lenders typically use a combination of all three factors to determine your borrowing capacity. The weight given to each element depends heavily on the type of loan you are seeking, your personal circumstances, and your planned exit strategy. In this guide, we will examine how these metrics interact to shape your final lending limit.
The Foundation: Property Value
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The current market value of your asset is almost always the starting point for any secured lending calculation. Before approving a loan, a lender will instruct a professional surveyor to establish the property’s Open Market Value (OMV). This represents the price the property would realistically achieve if sold on the open market under normal conditions.
Once the value is established, the lender applies a maximum Loan-to-Value (LTV) ratio. For standard bridging finance and secured loans, the maximum LTV generally ranges from 60% to 75%. For example, if your property is valued at £400,000, a lender offering a 70% LTV would set the gross facility limit at £280,000.
In some circumstances, particularly for property developers or heavy renovation projects, lenders may look at the Gross Development Value (GDV) instead. GDV is an estimate of what the property will be worth once all planned building works are completed. Because GDV lending carries more risk, the initial facility limit may be lower, with further funds released in stages as construction progresses.
The Deciding Factor: Available Equity
While property value sets the theoretical ceiling, your available equity determines your actual borrowing capacity. Equity is the difference between the current market value of your property and the outstanding balance of any mortgages or loans already secured against it.
Lenders must consider whether they will hold a first charge or a second charge on the property. If you have an active residential mortgage, that bank holds the first charge. Any new facility will be a second charge loan, which carries higher risk for the new lender because they only get paid after the first charge holder is fully satisfied in a sale.
To calculate a second charge facility limit, the lender subtracts your existing mortgage balance from their maximum LTV limit. If your £300,000 property has a 70% LTV limit (£210,000) and your current mortgage is £150,000, your maximum facility is restricted to £60,000. Lenders also assess your credit history to evaluate risk. Get your free credit search here. It’s free for 30 days and costs £14.99 per month thereafter if you don’t cancel it. You can cancel at anytime. (Ad) Your credit history helps determine the exact terms you are offered.
The Role of Rental Income
For buy-to-let investments and commercial projects, rental income is a crucial factor. Lenders must ensure the property can generate enough income to cover the interest payments, especially if the exit strategy relies on long-term refinancing onto a standard buy-to-let mortgage.
Lenders evaluate this using the Interest Cover Ratio (ICR). The ICR measures if the projected rental income is sufficient to cover the loan’s interest payments. Lenders typically look for an ICR of 125% to 145%, calculated using a stressed interest rate to protect against future rate rises. If the rental income falls short of this requirement, the lender will likely reduce your facility limit. Even with high equity, poor rental yields can limit your borrowing power.
Gross vs. Net Facility Limits and Rolled-Up Interest
It is vital to distinguish between gross and net facility limits. The gross limit is the total loan size, including fees and interest. The net limit is the actual cash you receive on completion day.
In bridging finance, interest is typically “rolled up” or “retained” rather than paid monthly. This means the interest is added to the loan balance and repaid in one lump sum at the end of the term. While this supports cash flow during renovations, it reduces the net cash you receive on day one.
For example, on a £100,000 gross facility with £15,000 of rolled-up interest and fees, your net facility limit—the actual cash in hand—will be £85,000. Knowing this difference is essential for planning your project budget accurately.
How Open vs. Closed Loans Impact Calculations
Your chosen exit strategy also influences how a lender assesses risk and calculates your limit. Bridging loans are categorised as either open or closed. For more information, read the MoneyHelper guide on bridging loans.
A closed bridging loan has a fixed, guaranteed exit date, such as an exchanged contract on a property sale. Because the risk of default is lower, lenders are more likely to offer their maximum LTV limit. An open bridging loan has an expected exit route but no set date. Because of this added uncertainty, lenders may be more conservative, potentially reducing the maximum facility limit they are willing to offer.
Default Implications and Risk Warning
Secured borrowing requires careful management. Your property may be at risk if repayments are not made. If you cannot settle the facility at the end of the term, you face serious financial and legal consequences.
In a default scenario, the lender will not simply report a missed payment to credit agencies. They may initiate legal action to repossess and sell your property to recover the outstanding debt. Additionally, defaulting typically triggers increased interest rates and substantial additional charges, rapidly reducing any remaining equity you hold in the property.
People also asked
Does bad credit stop you from getting a property facility?
Not necessarily, but poor credit can lead lenders to offer a lower facility limit or higher interest rates. Lenders will also scrutinise your exit strategy much more closely.
What is the difference between open and closed bridging loans?
A closed bridging loan has a fixed, confirmed date for repayment, while an open bridging loan has a planned exit strategy but no specific, guaranteed repayment date.
Why is my net facility limit lower than the gross limit?
Your net limit is lower because lenders deduct all setup fees, arrangement costs, and rolled-up interest from the gross limit before releasing the remaining cash to you.
How does rental income affect a commercial bridging loan limit?
Lenders use rental income to calculate the Interest Cover Ratio, reducing the facility limit if the projected rent cannot comfortably cover the stressed interest costs of the loan.
What is Gross Development Value (GDV) in lending?
GDV is the estimated future market value of a property once all planned construction, extension, or renovation works have been fully completed to a professional standard.
Summary
In summary, your facility limit is not decided by a single factor. Lenders balance your property’s market value, your available equity, and any potential rental income to calculate a safe borrowing limit. By understanding how these figures interact, and keeping the difference between gross and net limits in mind, you can plan your next project effectively and protect your financial security.


