A client came to me last year — a physio who had been renting her clinic space for eleven years. She had built a loyal patient list, covered her costs comfortably, and was paying more in rent than a mortgage would cost her. She arrived with a property in mind, a deposit ready, and the reasonable expectation that this would be straightforward. Her first direct approach to a lender had not gone well. The lender asked for three years of accounts, queried her sole trader structure, and then went quiet. "I assumed they'd just look at the property," she told me. They had not.

That assumption — that a commercial mortgage works like a residential one, with the bricks at the centre of the conversation — catches out more business owners than I can count. Understanding a commercial mortgage for small business UK purposes means first accepting that the property is almost secondary. What the lender is buying into is the business behind it.

The Business Comes First — Always

When a lender assesses an owner-occupied commercial mortgage, they are essentially asking one question before any others: will this business still be trading in ten years' time, reliably generating enough surplus to service this debt?

To answer that, they dig into the fundamentals. Most lenders want to see a minimum of two to three years of filed accounts, though two is often the floor rather than the expectation. They will look at turnover, but what matters far more is net profit — specifically, whether the business generates enough profit, after the owner draws a salary, to cover the proposed repayments with room to spare. This is the heart of commercial mortgage affordability criteria: lenders typically want to see debt service coverage of around 1.25x to 1.5x, meaning for every £1.25 to £1.50 of net operating income, there is £1.00 of mortgage repayment. The ratio varies by lender and sector, but the principle is consistent.

Sector matters more than many business owners expect. A lender who is comfortable lending to a dental practice may be cautious about a restaurant. Not because restaurants are poorly run, but because the failure rate in hospitality is statistically higher, which shifts the risk profile. Some lenders have what the industry calls "sector appetite" — lists of business types they will and will not consider at any given time. This is rarely published. It is one of the reasons working with a broker who speaks to these lenders regularly is worth the conversation.

Business structure also comes into focus early. A limited company with clean accounts and a director drawing a reasonable salary is often easier to present than a sole trader where personal and business income are intertwined. That does not mean sole traders cannot access commercial finance — many do — but the documentation requirements tend to be more involved, and the narrative around affordability needs to be built more carefully.

What the Deposit Requirement Actually Reflects

Commercial mortgage deposit requirements are usually higher than residential equivalents, and this surprises people who have been remortgaging their homes at a far higher loan-to-value for years.

As a general guide, many owner-occupied commercial mortgages are offered at between 65% and 75% loan-to-value (indicative, from lenders on our panel, checked October 2026), and what you are offered depends on your circumstances. That implies a deposit of 25% to 35% before costs. On a £500,000 property, that is between £125,000 and £175,000 in equity — not including legal fees, survey costs, and stamp duty land tax. The terms available to any individual borrower will depend on their own situation, and nothing here should be read as a promise of what any lender will offer.

The higher deposit is not arbitrary. Commercial property is less liquid than residential. If a business fails and the lender needs to enforce, selling a former dental surgery or a light industrial unit takes longer and carries more uncertainty than selling a terraced house. The deposit is, in part, the lender protecting themselves against that illiquidity.

Where the deposit comes from is also scrutinised. Lenders will want to see that it is genuinely held, not borrowed or gifted in a way that creates a shadow liability. If the deposit is sitting in a business account, they will often ask for six months of statements. If it is coming from the sale of another property, they will want to see the completion statement.

There is a further nuance worth understanding: some lenders will consider the property's commercial value alongside its "bricks and mortar" value, factoring in the business trading from it. This can, in specific circumstances, influence the lending position — but this is lender-specific and never guaranteed. Your home may be repossessed if you do not keep up repayments on your mortgage, and the same principle applies to commercial premises: the asset is security, and lenders will act accordingly.

Timing, Rates, and What the Market Looks Like Now

*The rate and MPC information below was correct at the time of writing. Interest rates and market conditions change frequently — please seek current advice before making any borrowing decisions.*

The Bank Rate is set by the Bank of England's Monetary Policy Committee, which meets roughly every six weeks; the current rate and the date of the next decision are on the [Bank of England's Bank Rate page](https://www.bankofengland.co.uk/monetary-policy/the-interest-rate-bank-rate). Market expectations ahead of that meeting lean towards another hold, but this is genuinely uncertain territory. Three of the nine committee members voted to raise rates at the September meeting, which means the November decision could go either way. Business owners planning to approach a lender in the near term should factor in that uncertainty rather than assume a particular outcome.

Commercial mortgage rates are priced independently of base rate in ways that residential rates are not — many are tied to SONIA (the Sterling Overnight Index Average, a benchmark used to price variable-rate commercial lending) or to the lender's own cost of funds — but the broader rate environment shapes appetite and margin. A lender nervous about rate direction may price more conservatively or tighten criteria. The honest position is that no one should be making a borrowing decision on the assumption that rates will move in a particular direction in September.

What is consistent regardless of rate direction: lenders want to see a business that could absorb a rate rise without the mortgage becoming unmanageable. Stress-testing affordability at a rate one or two percentage points higher than the offered rate is standard practice, and preparing your numbers with that in mind before the first conversation with a lender is time well spent.

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The physio from that opening story completed on her clinic purchase seven months after that first failed approach. The property was the same one she had originally identified. What changed was the preparation — the way the application was structured, the narrative built around her accounts, and the choice of lender. None of it was complicated. It just required knowing what the conversation actually needed to contain.

The business owners who navigate commercial lending most smoothly are rarely the ones with the most impressive properties. They are the ones who arrive knowing what they are being asked to prove — and who have taken the time to build the evidence before the question is asked.

Lawes Financial is an independent mortgage broker (FRN 1046161), an appointed representative of Andrew Charles Consulting Ltd, which is authorised and regulated by the FCA. A conversation with one of our advisers carries no obligation and is a practical first step before approaching any lender directly. We work across the whole of the commercial mortgage market, which means our recommendations are based on your circumstances — not on any one lender's criteria.

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*Figures quoted are illustrative only. Your actual outcome will depend on your
individual circumstances, loan size, term, and the products available to you.*

*This is not financial advice. Speak to an independent mortgage broker before
making any decisions.*

*Lawes Financial Limited (FRN 1046161) is an appointed representative of Andrew Charles Consulting Ltd, which is authorised and regulated by the Financial Conduct Authority (FRN 304904).*