How Much Deposit for a Commercial Mortgage?

Most commercial mortgage lenders in the UK ask for a deposit of between 20% and 40% of the property's value. The average sits around 25% to 30%, meaning you retain 70% to 75% loan-to-value (LTV). Your exact commercial mortgage deposit requirement depends on the lender, the property type, your business financials, and your credit history.

To put that into real numbers: on a commercial property worth £300,000, a 25% deposit means putting down £75,000 and borrowing £225,000. At 35%, the same property requires £105,000 upfront. The difference of £30,000 directly affects how much working capital you keep in the business.

Some specialist lenders offer LTV ratios up to 80%, reducing the minimum deposit for a commercial mortgage to 20%. At the other end, higher-risk properties or borrowers with adverse credit may face deposit requirements of 35% to 40%. Lenders advertising 100% commercial mortgages do exist, but they require additional security such as a second property or personal guarantee rather than offering a genuinely cashless deal.

The commercial mortgage deposit percentage you are quoted also varies by whether you are buying owner-occupied premises, a commercial investment property, or a semi-commercial building with mixed residential and commercial use. Each carries a different risk profile in the lender's eyes, which directly sets the LTV they are willing to offer.

Understanding exactly where your scenario falls on this spectrum is the first step toward knowing how much cash you need before approaching a lender.

Four core factors determine how much deposit a lender will ask for on a commercial mortgage. Understanding each one helps you anticipate the figure before you apply and take steps to improve your position.

Your credit history plays a significant role. Lenders review both your personal credit file and, if applicable, your business credit record. Clean credit with no defaults, CCJs, or late payments typically unlocks lower commercial mortgage deposit requirements of 20% to 25%. Adverse credit pushes the deposit higher, often to 35% or more, as the lender compensates for additional risk.

The property type and its intended use carry substantial weight. Standard office space or retail units in established locations attract lower deposits than specialist properties such as care homes, pubs, or petrol stations. Lenders view specialist assets as harder to resell if the loan defaults, so they protect themselves with a larger deposit buffer.

Your business financials, including trading history, profitability, and cash flow, also affect the offer. A business with three or more years of strong accounts and healthy debt service coverage will secure more competitive terms than a startup or a business with thin margins.

Finally, the overall commercial mortgage LTV ratio the lender is comfortable with ties everything together. Each lender sets its own maximum LTV based on its risk appetite, and that cap directly determines your minimum deposit.

The table below shows typical deposit and loan amounts across four property categories at three different purchase prices. These figures use representative commercial mortgage deposit percentages based on current UK lender criteria and are designed to help you budget for your specific scenario.

Office space in established business parks typically falls at the lower end of the deposit range, with most lenders comfortable at 25% deposit and 75% LTV. Retail units on secondary high streets attract slightly higher deposits of around 30%, reflecting higher vacancy risk. Semi-commercial properties, such as a shop with a flat above, can sit anywhere from 25% to 35% depending on the residential-to-commercial income split. Specialist properties like pubs, restaurants, or healthcare premises often require deposits of 35% or more.

These worked examples show why a one-size-fits-all deposit figure is misleading. A 25% deposit on a £250,000 office is £62,500. That same percentage on a £1,000,000 specialist property is £250,000. But in practice, the specialist property is more likely to require 35%, pushing the deposit to £350,000. Planning with accurate, property-specific figures prevents cash flow surprises later in the process.

If you want to model your own figures, the commercial mortgage calculator lets you adjust property value and deposit percentage to see monthly repayment estimates.

Commercial and residential mortgages differ substantially in how deposits work. Understanding these differences matters if you are transitioning from residential property ownership to commercial investment, or if you are comparing the cost of a semi-commercial mortgage against a standard buy-to-let.

The most obvious difference is the deposit size. Residential mortgages commonly accept 5% to 15% deposits, with 95% LTV products widely available for owner-occupiers. Commercial mortgages start at 20% and more commonly require 25% to 35%. This gap reflects the higher risk lenders associate with commercial property: vacancy periods tend to be longer, values can fluctuate more sharply, and the pool of potential buyers if the lender needs to repossess is smaller.

Assessment methods also differ. Residential lenders focus primarily on your personal income and affordability. Commercial lenders assess the business's ability to service the debt, examining trading accounts, cash flow projections, and the rental income the property generates. This means a strong business case can sometimes compensate for a slightly lower deposit, whereas residential assessments follow a more formulaic approach.

Term lengths diverge too. Residential mortgages typically run for 25 to 35 years. Commercial mortgage terms are shorter, usually 15 to 25 years, which means higher monthly repayments even before accounting for the typically higher interest rates on commercial lending.

Some lenders advertise 100% commercial mortgages, but these rarely mean zero cash outlay in the way a 100% residential mortgage once did. Instead, 100% LTV commercial mortgages typically require you to offer additional security, usually another property you own, to cover the shortfall between the loan and the purchase price.

For example, if you are buying a £400,000 commercial unit and the lender offers 100% LTV, they may place a second charge on your existing residential or commercial property worth at least £100,000 to £160,000 in equity. You avoid putting cash into the deal, but you increase the total property at risk if the business fails to meet repayments.

Low deposit commercial mortgages at 80% LTV are more realistic for borrowers with strong credit and profitable businesses. At this level, you need just 20% deposit, and some lenders will consider cross-collateralisation of existing assets to bridge even part of that amount.

Be honest about the trade-offs. Lower deposits mean higher monthly repayments, higher interest rates, and larger arrangement fees. A lender offering 80% LTV may charge 1.5% to 2% more in interest than one offering 65% LTV on the same property. Over a 20-year term, that rate difference adds tens of thousands of pounds in total interest costs.

If you have adverse credit and are exploring low deposit options, it is worth exploring bad credit mortgage options before committing to a higher-cost deal that compounds risk.

Finding the deposit is often the biggest hurdle in commercial property purchases. Beyond straightforward business savings, several UK-specific funding routes can help you reach the required amount.

SSAS and SIPP pensions: a Small Self-Administered Scheme (SSAS) or Self-Invested Personal Pension (SIPP) can purchase commercial property directly, with the pension fund acting as buyer. Alternatively, SSAS pension funds can lend money to your business to use toward a deposit. The property must be used for genuine business purposes, and strict rules apply, but this route lets you deploy retirement savings without incurring immediate tax charges. SIPP purchases are limited to commercial property only and cannot include any residential element.

Director's loans: if your limited company has retained profits, you can lend money from the company to yourself as a director, or use company funds directly if purchasing through the business. Be aware of the tax implications. Director's loans above £10,000 trigger a benefit-in-kind charge, and loans not repaid within nine months of the company's year-end incur a 33.75% Section 455 tax charge.

Remortgaging existing assets: whether residential or commercial, a commercial remortgage or residential remortgage can release equity to use as a deposit on a new purchase. If your current property has increased in value or you have paid down significant mortgage debt, remortgaging could unlock substantial capital.

Investor equity and joint ventures: sharing the deposit burden with a partner or investor reduces your personal outlay. Mezzanine finance fills the gap between your senior commercial mortgage and your available deposit, though it comes at a higher interest rate, typically 12% to 20% per annum. Bridging loans can provide short-term deposit funding while you arrange longer-term finance, but monthly costs of 0.5% to 1.5% make them expensive if the bridge period extends beyond a few months.

The size of your commercial mortgage deposit does more than determine how much you borrow. It directly influences the interest rate, arrangement fees, and overall cost of the mortgage across its full term.

Interest rates drop as your deposit increases. A commercial mortgage at 75% LTV might carry a rate of 3.5% above the Bank of England base rate. The same lender may offer 2.5% above base rate at 60% LTV. On a £500,000 loan over 20 years, that 1% rate difference translates to roughly £60,000 in additional interest over the full term. Putting in an extra £75,000 at the outset, moving from 25% to 40% deposit on a £500,000 property, could therefore save you close to that figure in interest alone.

Arrangement fees on commercial mortgages are typically calculated as a percentage of the loan amount, usually between 1% and 2%. A larger deposit means a smaller loan, which directly reduces the arrangement fee in absolute terms. On a £750,000 property, the difference between borrowing £562,500 at 75% LTV and £450,000 at 60% LTV saves you £1,687 in arrangement fees at a 1.5% rate.

Early repayment charges also scale with the loan amount. If your business circumstances change and you need to exit the mortgage early, a smaller loan means a smaller penalty. ERCs on commercial mortgages typically range from 1% to 5% of the outstanding balance, depending on how far into the term you are.

Understanding the relationship between commercial mortgage rates and your deposit helps you make a more informed decision about how much to put down versus how much to keep as working capital.

The legal structure you use to purchase a commercial property can influence the deposit a lender requires. Buying as a limited company, sole trader, or partnership each carries different implications for risk assessment and the LTV you are offered.

Limited company: most commercial property purchases are structured through a limited company or special purpose vehicle (SPV). Lenders favour this structure because the company's assets and liabilities are ring-fenced from personal finances. A limited company with a strong balance sheet, retained profits, and clean credit may qualify for deposits as low as 20% to 25%. The company's trading accounts, filed at Companies House, give the lender transparent financial data to assess.

Sole trader: buying commercial property as a sole trader means the lender assesses your personal finances alongside your business accounts. There is no separation between personal and business liability, which some lenders view as higher risk. Deposit requirements for sole traders typically start at 25% and can reach 35% or higher depending on the property type and your personal credit profile.

Partnership: partnerships fall between limited companies and sole traders in terms of lender appetite. A traditional partnership carries unlimited liability for all partners, while a limited liability partnership (LLP) offers some protection. Lenders will assess the financial strength of all partners and may require personal guarantees from each, which can affect the deposit percentage offered.

Choosing the right structure before you apply can save you money on the deposit and improve your overall mortgage terms. Speak to both an accountant and a broker before committing to a purchase structure.