Commercial mortgage calculator

Commercial mortgages can be complex, as can verifying whether the charges and total repayments align with your cash flow and business plans. Our commercial mortgage calculator makes it easier to get to grips with all the metrics involved.

Property or loan details

Error: Property must be valued at £50,000 or more.

Error: Estimated rental income must be between £1 and £99,999.

Based on your details, you can borrow up to:


This calculator is an estimation of how much you could borrow. If you’re ready to take out a mortgage, speak to a Revolution brokers to see what options are available.

Whether you are considering a commercial mortgage to refinance and raise capital, or wish to expand your investment portfolio, choosing your commercial mortgage is a long-term decision.

The Revolution Brokers commercial mortgage calculator helps you instantly compare different mortgage rates and different investment scenarios to help you understand the best course of action.

LTV ratios on commercial properties

One of the most crucial factors in securing a commercial mortgage is the loan to value ratio. This is the comparison of the value of the property and your annual mortgage repayments against the future revenues generated by rental income.

This factor is essential, as many lenders will base their commercial mortgage offers against a capped LTV ratio.

When you complete the commercial mortgage calculator information, be sure to let us know the purchase price of the property, or the valuation if you are mortgaging against existing property. The estimated monthly rental income will help us to calculate the mortgage options available instantly.

Bear in mind that the lower the LTV value, typically the more economical the associated interest rates since the risk to the lender is more moderate.

Interest cover ratios (ICRs) on commercial mortgages

The interest cover ratio (ICR) is another calculation you will come across when considering commercial mortgage rates. This ratio uses the revenue created by your investment compared to the interest incurred over the same period.

Mortgage lenders need to complete an affordability assessment before extending any offers of lending, so this calculation makes sure that your commercial mortgage is affordable.

As an indication, an ICR of two or more is usually considered acceptable. The criteria for ICR vary between lenders, and they may have other measures that are considered more valuable.

Choosing how much to apply for on a commercial mortgage

Our calculator will instantly tell you what level of mortgage offer we anticipate you will be able to secure against your property.

This takes into account several different factors including:

  • The purpose of the mortgage - what you are raising finance for.
  • What your ICR is - the percentage indicates how the rental revenue compares to the repayment costs. For example, 140% means that your rental income will be to a value of 140% of the mortgage repayments.
  • How much the property is going to cost or is valued at.
  • What the monthly rental income is expected to be.

How to use the Revolution Brokers commercial mortgage calculator

  1. Let us know what your borrowing is for. This could be for:
  • A property purchase
  • To raise capital
  • To remortgage without raising capital
  1. Tell us your anticipated ICR. Options include:
  • Personal or company commercial mortgage applications
  • Semi-commercial properties - i.e. part commercial and part residential
  • HMOs (houses of multiple occupancies) up to six beds or over six beds
  • Buy-to-let investment properties
  1. Enter the cost of the property or the value. If you are unsure, please use an estimated total, although you should be aware that the commercial mortgage options available may vary when the accurate value is known.
  2. Let us know your anticipated rental income from your property investment.

If the available options do not cover your commercial mortgage needs, please give us a call on 0330 304 3040, and we will be happy to provide a quick indication of your mortgage options.

Once you click the calculate button, you will receive an instant indication as to the value of mortgage we think will be available to you.

For specific commercial mortgage advice and a tailored quote, give Revolution Finance Brokers a call - we work with specialist lenders across the commercial mortgage market to offer outstanding deals and flexible terms.


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FCA disclaimer

The content included in our articles, blogs, web pages and news publications is based on information accurate at the time of writing. Note that policies and criteria can change regularly throughout the UK mortgage lending market, and it remains essential to contact the consultation team to receive up to date guidance. The information included on the Revolution Brokers site is not bespoke to any circumstances or individual application scenarios and therefore is not intended to be used as financial advice. The content we share is designed to be informative and helpful but cannot be relied upon to provide individual advice relevant to your mortgage requirements. All Revolution team members are fully qualified, trained and experienced to provide mortgage advice of an independent nature. We collaborate with lenders and providers who are regulated, authorised and registered with the Financial Conduct Authority (FCA). Should you require specific mortgage borrowing types, some products such as buy to let mortgages may not be FCA regulated. The Revolution team can provide further information about regulated and unregulated lending as required. Please remember that a mortgage is a debt which is secured against your home or property. Your home can be at risk of repossession if you do not keep up with the repayments or encounter any other difficulties in managing your mortgage borrowing responsibly. This also applies to any remortgage or home loan secured against your property, including equity release products.

Ask the Mortgage Experts

Revolution Brokers understands that mortgages can be complex and confusing!

Ask us any question you might have, and one of our skilled consultants will come back to you as quickly as possible.