Bridging Finance Calculator UK

Bridging finance is a short-term, secured loan used to "bridge" a funding gap until longer-term finance can be arranged or a property is sold. In the UK property investment context, bridging loans are most commonly used to purchase properties at auction (where completion must happen within 28 days), to fund a refurbishment on a property that cannot yet be mortgaged, or to break a chain where a buyer needs to complete before their current property sells.

Unlike a standard buy-to-let mortgage, a bridging loan is underwritten primarily on the strength of the exit strategy — the plan for how the loan will be repaid. This might be refinancing onto a long-term mortgage once the property is tenanted, selling the property after refurbishment, or the completion of another property sale. Because lenders are taking a short-term, higher-risk position, bridging rates are significantly higher than mortgage rates.

Bridging finance is offered by specialist lenders and arranged through commercial finance brokers. It is not available on the high street. Regulated bridging loans (for owner-occupied properties) fall under FCA regulation, while unregulated bridging (for investment properties) does not — although lenders must still follow responsible lending principles.

The total cost of a bridging loan has four distinct components, all of which this calculator models:

• Arrangement fee — typically 1–2% of the gross loan amount, charged upfront or deducted from the loan drawdown. This is the lender's fee for setting up the facility and is non-refundable once committed.
• Monthly interest — charged on the full loan amount each month, typically between 0.75% and 1.2% per month. Interest is usually rolled up (added to the loan balance) and repaid at the end of the term along with the principal, meaning you are not making monthly payments during the loan term. The total rolled interest is the monthly rate multiplied by the loan amount multiplied by the number of months.
• Exit fee — charged by some lenders on redemption, typically 1% of the loan amount. Not all lenders charge an exit fee — it is worth negotiating this out where possible, particularly on larger loans.
• Legal and valuation fees — the borrower pays the lender's legal fees (typically £1,000–£2,000) and a RICS valuation (typically £500–£1,500 depending on property size and type). You will also have your own legal fees. Total legal and valuation costs are commonly in the range of £2,500–£5,000.

When comparing bridging offers, always compare the total cost of the facility rather than just the headline monthly rate — a lower rate with a higher arrangement fee can result in a higher total cost over a short term.

As of 2025–2026, typical UK bridging loan rates range from 0.75% to 1.2% per month. At the lower end (0.75–0.85%/month), you will typically find loans at 65–70% LTV with a clear, well-evidenced exit strategy such as refinancing a completed residential property. At the higher end (1.0–1.2%/month), you will find higher-LTV loans, heavier refurbishment projects, or borrowers with a less straightforward exit.

In effective APR terms, 0.95% per month equates to approximately 12% APR (compounding), making bridging finance roughly 2–3x more expensive than a standard buy-to-let mortgage rate. This is why bridging finance is only suitable for short-term scenarios where the return on the project — or the cost of not moving quickly — outweighs the finance cost.

Rates are currently under downward pressure as more specialist lenders have entered the market. A good commercial finance broker with access to the whole of market will typically be able to improve on the first indicative terms offered by any single lender.

Bridging finance is the right tool in three main scenarios:

• Auction purchase — auction completions are typically required within 28 days of the hammer falling. A standard mortgage cannot be arranged in this timeframe, making bridging finance the only viable option for most auction buyers. The bridge is then repaid either by selling the property or refinancing onto a long-term mortgage once any required works are complete.
• Refurbishment then refinance (BRRR) — properties in poor condition are often unmortgageable in their current state. A bridging loan funds both the purchase and the refurbishment, after which the improved property is valued and refinanced onto a buy-to-let mortgage. If the uplift in value is sufficient, the investor can often pull out most or all of their initial capital — the BRRR (Buy, Refurbish, Refinance, Rent) strategy.
• Chain break — where a buyer needs to complete on a new purchase before their existing property has sold, a bridging loan can fund the gap. This is a regulated bridging product if the property being purchased is to be owner-occupied.

In all cases, the exit strategy must be clearly defined and credible before committing to a bridging loan. A property that takes longer to sell or refinance than expected can result in significant additional interest costs — or, in the worst case, a lender enforcing their security.

• Buy-to-Let Calculator — model the long-term BTL returns after the bridge is repaid
• Mortgage Calculator — compare exit mortgage payments against your bridging term cost
• Property Flip Calculator — model a flip project funded by bridging finance from purchase to sale