Interest Rate on Commercial Property Loan: UK Guide 2026

A commercial property loan interest rate is the annual cost of borrowing, expressed as a percentage of the outstanding balance. Unlike residential mortgages, commercial rates are rarely published on a simple tariff — lenders price each deal individually based on the property, the borrower's track record and the strength of the underlying business case.

In the UK market as of 2026, commercial mortgage interest rates typically sit in the range of 4.5% to 8% p.a. for standard investment and owner-occupier deals. Specialist or higher-risk transactions — such as loans to newly incorporated companies, assets in secondary locations or properties with vacant possession — can attract rates above 8% p.a. At the competitive end, experienced borrowers with strong assets and lower loan-to-value ratios can access rates closer to 4.5%–5.5% p.a. through specialist lenders.

Most commercial mortgage rates are quoted as a margin above the Bank of England base rate (for variable products) or as an all-in fixed percentage. As the base rate moves, variable-rate borrowers feel the impact directly on their monthly payments. Fixed-rate borrowers are protected during the fixed term but will need to refinance — often at prevailing market rates — when the fixed period expires.

The lender landscape is broad. High-street lenders such as NatWest and Barclays publish standard commercial mortgage products, while challenger and specialist banks like Shawbrook, Allica Bank, Redwood Bank and InterBay offer sharper pricing or greater flexibility for deals that fall outside vanilla criteria. Specialist property lenders and insurance-backed funds compete at the larger end of the market, typically above £1M of facility, where pricing can be finely negotiated.

It is important to distinguish between the nominal interest rate and the true cost of borrowing. Arrangement fees (typically 1%–2% of the loan), valuation fees, legal costs and any broker fees all add to the effective annual cost. Comparing deals on the basis of the headline rate alone can be misleading — always model the total cost across the full loan term.

For property developers who need a loan to purchase or refinance a commercial investment, understanding these components is the first step. Our commercial mortgages service covers the full spectrum of products available through our 100+ lender panel.

The choice between a fixed and variable rate is one of the most consequential decisions you will make when structuring a commercial property loan. Each has clear advantages depending on your cashflow requirements, investment horizon and view on future interest rate movements.

Fixed rates lock your interest cost for a set period — commonly 2, 3 or 5 years — giving you certainty over monthly debt service costs. This is especially valuable for commercial investors whose rental income is fixed under long-term leases. The trade-off is that fixed-rate products almost always carry early repayment charges (ERCs), which can be material if you sell or refinance before the fixed term ends.

Variable rates — whether a tracker priced at Bank of England base rate plus a margin, or a lender's standard variable rate (SVR) — move with the market. When the base rate falls, your payments reduce automatically. Variable products tend to offer greater flexibility for redemption, making them attractive where an exit within 12–24 months is anticipated.

When a fixed-rate term expires, most lenders automatically move the borrower onto their SVR, which is typically higher than the initial rate. Borrowers who miss this reversion date can end up paying significantly more than necessary — a common and costly oversight in commercial property finance.

Lenders do not apply a single rate to all commercial borrowers. Pricing is individualised and driven by a set of risk factors that any experienced broker will use to position your application before it reaches a credit committee.

• Loan-to-value (LTV): The single biggest pricing lever. At 50% LTV, lenders compete aggressively and rates compress. At 70%–75% LTV — the typical maximum for commercial property — the margin widens to reflect higher lender risk.
• Property type and occupancy: Fully let, multi-let office or retail assets with strong covenants command better rates than vacant or single-let properties. Industrial and logistics assets have attracted particularly competitive pricing in recent years given occupational demand. Semi-commercial assets — for example a retail unit with a flat above — typically price between pure residential and pure commercial. Mixed-use, brownfield regeneration sites, and heritage conversions each attract bespoke pricing treatment.
• Borrower profile: Lenders review trading history, personal credit, existing portfolio performance and net asset position. A borrower with a proven track record of owning and managing commercial property will access materially lower margins than a first-time commercial investor. Limited companies and special purpose vehicles are the default structure for investment borrowers.
• Loan size: Larger loans often attract finer margins because the lender's fixed costs are spread over a greater facility. Loans below £150,000 may carry a rate premium; loans above £1m often receive more bespoke pricing.
• Interest cover ratio (ICR): Most commercial lenders require rental income to cover interest payments by at least 125%–135%. A higher ICR gives the lender more headroom and typically translates into a lower rate offer.
• Loan term: Shorter terms (5–10 years) generally attract lower rates than 20–25-year terms, reflecting lower duration risk for the lender.
• Personal guarantee: Some lenders price deals differently depending on whether a personal guarantee is provided. Offering a PG where not strictly required can sometimes unlock a lower margin.

Loan-to-value is the ratio of the loan amount to the lender's assessed value of the property, expressed as a percentage. It is the most direct lever borrowers have over their commercial property interest rate — and understanding it allows you to make strategic decisions about how much equity to deploy.

Most commercial mortgage lenders in the UK will lend up to 70%–75% LTV on investment commercial property, with some specialist lenders offering up to 80% LTV on semi-commercial assets (those with a residential element). Owner-occupier commercial mortgages can occasionally reach 80% LTV where the business trading from the premises is strong.

As a general principle, every 10 percentage points of LTV reduction tends to shave 0.25%–0.75% off the interest rate margin, though this varies by lender and asset. Borrowing at 50% LTV versus 70% LTV on a £1m property could mean the difference between a rate of 5.0% p.a. and 6.0% p.a. — a saving of £10,000 p.a. in interest on a £1m loan.

The lender's valuation, not the purchase price or the borrower's estimate, determines the LTV. Commercial valuations are carried out by RICS-qualified surveyors and use the investment method for income-producing assets — capitalising the passing rent or estimated rental value (ERV) at a market yield. Understanding how your asset will be valued is therefore essential to predicting what LTV you will be offered. Our guide to GDV vs market value explains the key distinctions between valuation methodologies used in property finance.

If you are purchasing at a price above the lender's assessed value — for example, paying a premium for development potential — the LTV will be calculated on the lower of the two figures, which can significantly reduce the loan available and push you into a higher rate band.

The interest rate on a commercial property loan is only one element of the total cost of borrowing. A complete financial appraisal should capture every fee the borrower will pay across the life of the facility, because a seemingly cheaper rate can become the most expensive option once set-up costs, ongoing charges and exit fees are included.

Arrangement fees are frequently added to the loan rather than paid up front, which increases the effective interest cost because borrowers pay interest on the fee over the loan term. For a £500,000 facility with a 2% arrangement fee rolled in, that is an extra £10,000 of principal accruing interest for the duration of the loan — the true cost should be modelled on the all-in basis.

Valuation fees scale with property value and complexity. A straightforward industrial unit or single-let office might attract a £1,000–£2,500 valuation; a multi-let retail parade, mixed-use block, or specialist asset can cost £5,000 or more. A structural or building condition survey may be required in addition. These fees are borne by the borrower regardless of whether the loan proceeds.

Commercial mortgage interest is generally deductible against rental income for tax purposes when the asset is held in a limited company structure — unlike residential buy-to-let, where mortgage interest relief for individual landlords has been restricted. This tax efficiency is one of the drivers behind the prevalence of SPV ownership for commercial investment.

Commercial property finance is not a single product. The rate you pay depends heavily on the instrument you use, and understanding the difference between a commercial mortgage and a commercial bridging loan is essential for any property investor or developer.

A commercial mortgage is a long-term facility — typically 5 to 25 years — intended for stabilised, income-producing assets. Interest rates are correspondingly lower, reflecting the longer-term nature of the security and the predictability of repayment from ongoing rental income.

A commercial bridging loan is a short-term facility — usually 3 to 24 months — used to bridge a gap: completing a purchase quickly before refinancing, acquiring a property at auction, funding a refurbishment, or holding an asset while planning consent is sought. Bridging rates are quoted monthly and typically range from 0.65% to 1.2% p.m. (approximately 7.8% to 14.4% p.a.), reflecting the short duration and higher risk profile. Auction finance is a sub-category of commercial bridging used specifically to meet the 28-day completion timeline that characterises commercial property auctions.

For larger or more complex schemes — for example a brownfield regeneration site being acquired and held prior to development — a joint venture or development finance structure may be preferable to a standalone commercial mortgage. Our guide to development finance vs bridging loans explores these distinctions in greater depth for development-focused borrowers.

The commercial property lending market is not homogeneous. High-street banks, challenger banks, specialist property lenders, insurance-backed lenders and debt funds all operate with different appetites, pricing models and credit criteria. A rate that one lender declines or prices punitively, another may welcome at a competitive margin.

There are several concrete steps borrowers can take to maximise their chances of securing the lowest available rate. First, reduce LTV where possible — equity is the single most effective rate lever. Even a modest additional deposit that takes borrowing from 70% to 65% LTV can generate meaningful savings over a five-year hold. Second, present a complete, well-organised application. Lenders price for uncertainty; a thorough information memorandum that addresses the asset, tenancy schedule, borrower balance sheet and exit strategy removes ambiguity and gives the credit team confidence to price keenly.

Third, engage a specialist broker with genuine lender relationships rather than applying direct to a single institution. High-street lenders publish commercial mortgage rates, but their published rates rarely represent the best available in the market. Specialist and challenger lenders — who may not advertise widely — frequently offer more competitive terms for the right deal. Drawing on Matt's 25+ years of experience and a 100+ lender panel, Construction Capital accesses pricing tiers not available to borrowers who approach lenders directly.

Fourth, consider whether a fixed or variable rate serves your strategy. If you anticipate selling or refinancing within 24 months, a variable rate with no ERCs may cost less in total even if the nominal rate is marginally higher. If you are holding for five years or more, locking in a fixed rate protects against a rising rate environment.

Finally, review the full cost of the loan — not just the headline rate. A 5.0% rate with a 2% arrangement fee and a requirement for a full structural survey may cost more in year one than a 5.5% rate with a 1% fee and a desktop valuation. Model every cost component before making a final decision. Our bank vs specialist lender guide sets out the trade-offs in detail.