Can I lock in a commercial mortgage interest rate?
26th March 2026
By Simon Carr
Can I Lock in a Commercial Mortgage Interest Rate?
Securing a fixed interest rate on your commercial mortgage can offer peace of mind, shielding you from potential interest rate increases during the loan term. However, it’s crucial to weigh this against the possibility of missing out on lower rates should they decrease in the future. This decision requires careful consideration of several factors.
Understanding Commercial Mortgage Interest Rates
Commercial mortgages, unlike residential ones, often offer more flexibility in terms of interest rate options. You might be able to choose between fixed-rate and variable-rate mortgages. A fixed-rate mortgage locks in your interest rate for a specific period, providing predictable monthly payments. A variable-rate mortgage, on the other hand, fluctuates with market interest rates, meaning your monthly payments could increase or decrease over time.
The Benefits of Locking in a Commercial Mortgage Interest Rate
- Predictable cash flow: A fixed rate gives you certainty in your monthly payments, making budgeting easier and reducing financial uncertainty.
- Protection against rising interest rates: If interest rates rise during your fixed-rate period, your monthly payments remain unchanged.
- Financial planning: Knowing your exact monthly payments helps with long-term financial planning and investment decisions.
Factors Affecting Your Ability to Lock in a Rate
- The lender: Not all lenders offer the same options. Some may only offer variable-rate mortgages, while others might have a wider range of fixed-rate options with varying terms.
- The loan term: Longer loan terms typically come with higher fixed interest rates. Lenders assess the level of risk associated with the longer time period and therefore may increase the interest accordingly.
- Your creditworthiness: Lenders assess your credit history and financial health. A stronger credit profile may help you secure better interest rates and more favourable terms.
- The property: The value and type of property being used as collateral will play a part in the interest rate you are offered. The risk assessed by the lender based on the security will impact the rates available.
It’s essential to shop around and compare offers from multiple lenders to find the most suitable option. The government offers a buyer’s guide to mortgages that may assist with understanding the process.
Potential Drawbacks of Locking in a Rate
- Higher interest rates: Fixed rates are typically higher than variable rates at the outset, reflecting the lender’s compensation for assuming interest rate risk.
- Missing out on lower rates: If interest rates fall during your fixed-rate period, you’ll miss out on lower payments. You could find you are paying more than your counterparts who went with a variable rate loan.
- Early repayment charges: Many lenders impose early repayment charges if you pay off the mortgage before the end of the fixed-rate period.
How to Lock in a Commercial Mortgage Interest Rate
The process of locking in a rate usually involves applying for a commercial mortgage and explicitly stating your preference for a fixed-rate product. Your lender will assess your application and, if approved, will offer you a fixed interest rate for a specified period. Remember, it’s advisable to obtain independent financial advice before making a decision.
The Importance of Due Diligence
Before committing to a fixed-rate commercial mortgage, thoroughly review the terms and conditions, paying close attention to the interest rate, loan term, and any associated fees or charges. This level of scrutiny helps to avoid unexpected surprises and to make an informed choice.
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Risks Associated with Commercial Mortgages
Your property may be at risk if repayments are not made. Failure to meet your repayment obligations can lead to legal action, repossession of the property, increased interest rates, and additional charges. It is crucial to carefully assess your ability to meet your repayment obligations before you commit to a commercial mortgage.
People also asked
Can I switch from a variable to a fixed-rate commercial mortgage?
Potentially, yes. However, it depends on your lender’s policies and whether they allow you to refinance your existing loan with a fixed-rate product. Early repayment charges may apply.
How long can I lock in a commercial mortgage interest rate for?
The length of the fixed-rate period varies depending on the lender and the specific product offered. Options range from a few years to a decade or more, but this is subject to the lender and current market conditions.
What fees might I encounter when locking in a commercial mortgage interest rate?
You may encounter arrangement fees, valuation fees, and legal fees in addition to the mortgage interest itself. These costs are payable when you secure the loan and vary depending on the loan amount and lender.
What happens if interest rates fall after I lock in a rate?
Unfortunately, you’ll continue to pay the fixed interest rate you agreed upon, even if market rates drop. This is a key trade-off to consider when deciding on a fixed versus variable-rate mortgage.
Does a poor credit history prevent me from locking in a commercial mortgage interest rate?
A poor credit history may make it more difficult to secure a fixed-rate mortgage, or it may result in less favourable terms and higher interest rates. It is always advisable to improve your credit profile before applying.
How do I compare commercial mortgage interest rates?
Use online comparison websites, speak to independent financial advisors, and compare offers directly with various commercial mortgage lenders to find the best deal for your circumstances.
Promise Money is a broker not a lender. Therefore we offer lenders representing the whole of market for mortgages, secured loans, bridging finance, commercial mortgages and development finance. These loans are secured on property and subject to the borrowers status. We may receive commissions that will vary depending on the lender, product, or other permissable factors. The nature of any commission will be confirmed to you before you proceed.
More than 50% of borrowers receive offers better than our representative examples
The %APR rate you will be offered is dependent on your personal circumstances.
Mortgages and Remortgages
Representative example
Borrow £270,000 over 300 months at 7.1% APRC representative at a fixed rate of 4.79% for 60 months at £1,539.39 per month and thereafter 240 instalments of £2050.55 at 8.49% or the lender’s current variable rate at the time. The total charge for credit is £317,807.66 which includes £2,500 advice / processing fees and £125 application fee. Total repayable £587,807.66
Secured / Second Charge Loans
Representative example
Borrow £62,000 over 180 months at 9.9% APRC representative at a fixed rate of 7.85% for 60 months at £622.09 per month and thereafter 120 instalments of £667.54 at 9.49% or the lender’s current variable rate at the time. The total charge for credit is £55,730.20 which includes £2,660 advice / processing fees and £125 application fee. Total repayable £117,730.20
Unsecured Loans
Representative example
Annual Interest Rate (fixed) is 49.7% p.a. with a Representative 49.7% APR, based on borrowing £5,000 and repaying this over 36 monthly repayments. Monthly repayment is £243.57 with a total amount repayable of £8,768.52 which includes the total interest repayable of £3,768.52.
THINK CAREFULLY BEFORE SECURING OTHER DEBTS AGAINST YOUR HOME
REPAYING YOUR DEBTS OVER A LONGER PERIOD CAN REDUCE YOUR PAYMENTS BUT COULD INCREASE THE TOTAL INTEREST YOU PAY. YOUR HOME MAY BE REPOSSESSED IF YOU DO NOT KEEP UP REPAYMENTS ON A MORTGAGE OR ANY OTHER DEBT SECURED ON IT.
Promise Money is a trading style of Promise Solutions Ltd – Company number 04822774Promise Solutions, Fullard House, Neachells Lane, Wolverhampton, WV11 3QG
Authorised and regulated by the Financial Conduct Authority – Number 681423The Financial Conduct Authority does not regulate some forms of commercial / buy-to-let mortgages
Website www.promisemoney.co.uk


