What determines your commercial mortgage rate in the UK?
Commercial mortgage rates are not set from a fixed published price list. Every rate is assessed on the individual case. Understanding what lenders look at allows you to present your application in the strongest possible way.
Loan to Value (LTV)
LTV is the single biggest factor influencing your commercial mortgage rate. A lower LTV means less risk for the lender — and a better rate for you. Most specialist lenders offer commercial mortgages up to 75% LTV, but the best rates are typically available below 65% LTV. If you can put in a larger deposit or have significant equity in an existing property, your rate improves substantially.
SWAP rates and the Bank of England base rate
Fixed commercial mortgage rates are priced against SWAP rates — the rate at which banks lend money to each other for a fixed period. When SWAP rates rise, fixed commercial mortgage rates rise with them. Variable commercial mortgage rates are typically priced as a margin above the Bank of England base rate. Monitoring both helps you decide whether to fix or take a variable rate product.
Property type and condition
Lenders assess risk by property type. Purpose-built offices, retail units with strong tenant covenants, and industrial warehouses tend to attract better rates than mixed-use, semi-commercial, or specialist properties. The condition of the property and its current income yield are also factored into the rate offered.
Income and debt service cover ratio (DSCR)
Commercial mortgage lenders assess whether the property income — and in some cases the borrower’s own income — comfortably covers the mortgage payments. A strong DSCR (typically 125% to 150% minimum) gives lenders confidence and supports a better rate. Thin income coverage leads to higher rates or outright declines.
Credit history and trading track record
A clean credit history with no CCJs, defaults, or significant adverse entries supports a better rate. For trading businesses, lenders will also want to see at least two to three years of profitable accounts. Borrowers with complex or adverse credit are not excluded but will typically pay a higher rate to reflect the additional risk.
High street banks versus specialist lenders — which offers better rates?
Many borrowers instinctively approach their existing bank for a commercial mortgage. This is often a mistake.
- High street banks apply rigid automated underwriting — if your case does not fit their specific criteria, you are declined regardless of the financial strength of the application
- Challenger banks and specialist lenders assess each case manually, giving them the flexibility to offer competitive rates for cases that banks decline
- Specialist lenders often have narrower appetite but deeper expertise in specific property types or borrower profiles — meaning they price risk more accurately and can offer better terms for the right case
- Building societies and mutual lenders often offer competitive rates for smaller commercial loans, particularly for borrower-occupied premises
The key point is that the best commercial mortgage rate for your specific case is rarely from the most obvious lender. A whole-of-market broker — with access to the full specialist lender panel — is the most effective way to identify and access it.
How a specialist broker gets you a better commercial mortgage rate
A whole-of-market commercial finance broker does more than send your application to multiple lenders. The way your case is presented — structured, packaged, and matched to the right lender — directly affects the rate you are offered.
What a specialist broker does to improve your rate:
- Identifies lenders whose criteria match your specific property type, income profile, and LTV
- Presents your application in the format each lender prefers — improving first impressions
- Negotiates on rate and arrangement fees using panel volume and relationships
- Avoids lenders whose decline would leave a footprint on your credit file
- Compares fixed versus variable products based on current SWAP rate and base rate outlook
A whole-of-market specialist broker compares 200+ lenders to find the most competitive commercial mortgage rate for your specific case — at zero broker fees.
How to strengthen your application to get the best rate
Before approaching lenders — directly or through a broker — these steps will materially improve the rate you are offered.
- Maximise your deposit or equity position — even a marginal LTV reduction from 70% to 65% can move you into a meaningfully better rate band
- Prepare clean financial documentation — two to three years of accounts, SA302s or management accounts, and up-to-date bank statements presented clearly
- Demonstrate rental income or business income clearly — lenders need to see that serviceability is comfortable, not marginal
- Address any adverse credit before applying — a credit report review allows you to correct errors and understand what lenders will see
- Have a clear exit or refinance strategy — particularly important for interest-only commercial mortgages
- Choose the right property type — if you have flexibility, a property with stronger lender appetite will command a better rate
Fixed versus variable commercial mortgage rates
Choosing between a fixed and variable rate commercial mortgage depends on your outlook for interest rates and your tolerance for payment volatility.
Fixed rate commercial mortgages give you certainty of monthly costs for the fixed period — typically two, three, or five years. They are priced against SWAP rates, which means they can be higher or lower than variable rates depending on market conditions. They are generally the right choice when interest rates are expected to rise or when budgeting certainty is important.
Variable rate commercial mortgages are typically priced as a margin above the Bank of England base rate. They offer flexibility — often including the ability to overpay or repay early without significant penalties — but expose you to rate movements. In a falling rate environment, a variable rate will reduce your monthly costs automatically.
A specialist broker will model both options against your specific circumstances and the current rate environment before recommending the right product.
Disclosure: Money Pilot Ltd (FRN: 968705) is an Appointed Representative of Yellow Stone Finance Group Ltd which is authorised and regulated by the Financial Conduct Authority (FRN: 814533). Yellow Stone Finance Group Ltd is a credit broker not a lender. Money Pilot Ltd is Registered in England and Wales No: 13621432. You should always make sure you are able to afford any repayments as late or missed payments can affect your credit rating and access to future finance.
YOUR PROPERTY MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON A MORTGAGE OR ANY OTHER DEBT SECURED ON IT.
