Commercial Mortgage Calculator

A commercial mortgage is used to buy or refinance property for business purposes, such as offices, shops, warehouses, or mixed-use buildings. Unlike residential mortgages, lenders assess both the business’s finances and the property’s income potential.

A commercial mortgage calculator helps you estimate your monthly repayments, total interest, and overall cost of a commercial loan based on key details like loan amount, interest rate, and repayment term.

How Does It Work?

  • Enter the loan amount you want to borrow
  • Adjust the interest rate
  • Choose the repayment term
  • Instantly see:
    1. Monthly capital & interest repayments
    2. Interest-only repayment amount
    3. Total amount payable
    4. Total interest charged

This calculator is for illustration purposes only. If you’d like a tailored quote or have questions about eligibility, simply enter your details and one of our mortgage advisors will get in touch to discuss your options.

Commercial Mortgage Calculator
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Get in touch now to discuss this further with expert mortgage advisors for free.


The figures provided by this calculator are for illustrative purposes and actual figures would depend on your situation and circumstances. Please connect with the expert mortgage advisors we work with to discuss further.

Commercial Mortgages: A Complete Guide

Picture this: You’ve finally got your business off the ground. It’s growing, your customer base is expanding, and you’re tired of paying rent to a landlord who keeps hiking up the price every year.

Sound familiar? You’re not alone.

According to recent data, the UK commercial property lending market showed a remarkable 33% year-on-year increase in the first half of 2025, reaching £22.3 billion in new lending. 

This surge reflects a growing number of business owners making the shift from renting to owning their workspace outright through a commercial mortgage.

But here’s the thing: commercial mortgages aren’t the same as residential home loans

They’re tailored specifically for businesses, and understanding how they work can save you money and headaches down the road.

Whether you run a small retail shop, operate an office, or manage a warehouse, this guide will explain everything you need to know about business mortgages in the UK, from how they work to current interest rates and what lenders actually look for.

What Exactly is a Commercial Mortgage?

What is Commercial Mortgage

At its core, a commercial mortgage is a loan specifically designed to finance the purchase of a property where your business operates. 

It’s different from a residential mortgage because the lender focuses on your business’s ability to generate income and repay the loan, not just your personal finances.

Commercial mortgages can be used for different purposes. 

You might want to buy the office, shop, or warehouse your business currently occupies (called an owner-occupier mortgage). 

Alternatively, you might purchase a property to rent out to other businesses (called a commercial buy-to-let or investment mortgage).

The UK commercial mortgage market is thriving. Commercial property lending reached £43.5 billion in 2023, marking a 9% increase year-on-year. 

By 2024, new loan volumes had climbed to £36.3 billion, showing strong, sustained demand from businesses wanting to own their premises (source)

Commercial vs Residential Mortgages: What’s The Difference?

While they sound similar, commercial and residential mortgages work quite differently.

Residential Mortgage

With a residential mortgage, lenders primarily care about your personal income, credit score, and ability to pay. They offer standardised products with set rates and terms. 

Commercial mortgages work the opposite way: they’re bespoke products tailored to your specific business situation.

Interest rates tell the story of this difference. Commercial mortgages typically range from 5.75% to 7.5% for semi-commercial properties, with broader rates spanning 5.25% to 7.75% depending on your sector and circumstances. 

For comparison, residential mortgages in January 2026 averaged around 4.48% for a 2-year fixed rate at 75% LTV.

Why the difference? Because lending on a commercial property carries a higher risk. Your business’s success directly affects your ability to make mortgage payments

A recession or market downturn could impact your ability to repay far more dramatically than it would affect a homeowner’s income.

How Much Can You Borrow In Commercial Mortgages?

The amount you can borrow depends largely on something called the Loan-to-Value ratio, or LTV. This is simply the loan amount divided by the property’s value, expressed as a percentage.

Currently, average LTV ratios across the UK commercial market sit at around 63.3%. 

This means lenders are typically willing to advance roughly 63% of a property’s value, requiring you to provide a deposit of about 37%.

In practice, most lenders offer LTV ratios between 65% and 75% for strong business applications. 

For owner-occupied mortgages (buying a property your business uses), the maximum LTV often reaches 75% to 80%, though this depends on your specific circumstances.

Here’s what this means in real money: 

If you want to buy a £200,000 property with a 70% LTV, you’d borrow £140,000 and need to provide a £60,000 deposit yourself.

Loan-To-Value (LTV) Calculator

LTV Calculator
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Get in touch now to discuss this further with expert mortgage advisors for free.


The figures provided by this calculator are for illustrative purposes and actual figures would depend on your situation and circumstances. Please connect with the mortgage advisors to discuss further.​

Most UK businesses need to put down deposits of between 20% and 40%. 

For established businesses with strong financials (revenue over £500,000), deposits might be as low as 20% to 25%.

On the other hand, newer businesses or those in riskier sectors typically need larger deposits, sometimes as high as 40%.

Current Interest Rates Breakdown (January 2026)

Let’s look at what actual rates look like right now:

Property Type Interest Rate Range LTV Range
Owner-Occupier Commercial 5.75% – 6.5% Up to 75%
Semi-Commercial/Mixed-Use 6.15% – 6.95% Up to 70%
Investment/Buy-to-Let 5.95% – 7.25% Up to 70%
Specialist Properties (Care Homes, Hotels) 6.50%+ Up to 65%

These rates represent the market as of January 2026. 

Your personal rate will depend on factors such as your business performance, the property’s location, and the equity you’re putting in.

Connect with a mortgage advisor we work with to get personalised information.

How To Get Approved for A Business Mortgage?

Getting approved for a commercial mortgage isn’t just about having good credit (though that helps); lenders want to understand your entire business picture.

First, they need proof that your business can afford the loan repayments. This typically means providing 2-3 years of audited business accounts or financial statements. If you’re newer, you might provide a detailed business plan with financial projections instead.

You’ll also need to show consistent profitability and healthy cash flow. Lenders use something called the Debt Service Coverage Ratio (DSCR) to assess this.

In simple terms, it measures whether your business makes enough profit to comfortably cover the loan payments. A DSCR of 1.25 times or higher is considered safe for stable assets.

Personal documents matter too. Lenders will review your personal credit history, ask for personal bank statements (usually 3-6 months’ worth), and request details of any other debts you have. 

Directors or business owners must typically provide personal guarantees, meaning you’re personally liable if your business can’t pay.

Here’s what you’ll typically need in your application pack:

  • Last 2-3 years of business accounts and tax returns
  • Business bank statements from the past 6 months
  • A business plan outlining future strategy
  • Personal tax returns and bank statements
  • Details of existing loans and credit facilities
  • Proof of your business experience or industry knowledge

It can be overwhelming or complicated to do it all by yourself. We recommend connecting with a mortgage advisor who can help you from start to finish.

Fixed vs Variable Rate Commercial Mortgages

When you secure your commercial mortgage, you’ll need to decide between a fixed or variable interest rate. Each has advantages and drawbacks.

With a fixed-rate mortgage, your interest rate stays the same for the entire agreed period – typically up to 25 years.

Your monthly payments remain predictable and stable, which helps with business budgeting and cash flow planning. 

The trade-off: fixed rates start slightly higher than variable rates, and if market rates drop, you won’t benefit from the reduction unless you refinance.

Variable rates, also called tracker or standard variable rates, move up and down with market conditions.

If the Bank of England base rate falls, your payments drop too. If it rises, so do your payments.

This offers flexibility and potentially lower starting rates, but your payments can change, making budgeting trickier.

​For most businesses buying long-term premises, fixed rates make sense. You get payment certainty and can accurately forecast your business costs. 

However, if you plan to sell or refinance within a few years, a variable rate might offer better value.

How Long Does It Take To Get Approved for a Commercial Mortgage?

It depends on complexity. Straightforward applications, such as refinancing an existing owner-occupier mortgage, might be completed in just a few weeks.

However, more typical applications average between 2-6 months, and complex scenarios involving multiple properties or unusual situations can take 3-6 months.

This isn’t a standard product like residential mortgages, so lenders take time to properly assess your business case.

Most commercial mortgage lenders follow a multi-step process: an initial brief application, a detailed financial review, valuation, underwriting, and a final decision.

However, the good news is that unlike residential mortgages, commercial lenders increasingly offer faster decisions.

Some alternative lenders now complete applications in 4-6 weeks, particularly for straightforward owner-occupier purchases.

Consider speaking with a commercial mortgage advisor. These specialists have relationships with 100+ lenders and know which ones best suit your specific situation and can significantly speed up the process.

Frequently Asked Questions

Can I get a commercial mortgage with a poor credit score?

Yes, you can still get a commercial mortgage with adverse credit, though your options may be more limited and rates could be higher.

How is a commercial mortgage different from a business loan?

A commercial mortgage uses the property as security and typically offers lower interest rates with longer repayment terms (up to 25 years). A business loan might be unsecured or secured against other assets, often with shorter terms but potentially faster approval.

Can self-employed people get commercial mortgages?

Absolutely. Self-employed business owners apply using the same process as limited companies. You’ll need to provide 2-3 years of certified accounts, SA302 forms from HMRC, and bank statements.

Should I refinance my commercial mortgage if interest rates drop?

Potentially, yes. Refinancing makes sense when rates have dropped significantly, and your LTV has improved through repayments.