Commercial Mortgage Calculator UK

Commercial Mortgage vs Residential Mortgage: Key Differences

Commercial mortgages differ fundamentally from residential mortgages in their assessment criteria, regulatory framework, and lending terms. Understanding these differences is essential before approaching lenders.

Regulation. Residential mortgages are regulated by the Financial Conduct Authority (FCA) under the Mortgage Credit Directive, which provides significant consumer protections. Commercial mortgages are largely unregulated, meaning lenders have more flexibility in their terms — but borrowers have fewer statutory protections. Always seek independent legal and financial advice before signing commercial mortgage agreements.

Assessment criteria. Residential mortgage affordability is primarily based on income (salary or self-employed earnings). Commercial mortgage assessment focuses on: the profitability and trading history of the business (typically 2–3 years of accounts required), the rental income potential of the property (for investment mortgages), the debt service coverage ratio (DSCR — typically lenders want rental income to cover 125%–150% of mortgage payments), and the experience and track record of the borrower.

Interest rates and fees. Commercial mortgage rates are significantly higher than residential rates, reflecting the greater risk. Beyond the interest rate, commercial mortgages typically involve arrangement fees of 1%–2% of the loan, valuation fees (commercial valuations cost £1,500–£5,000+ depending on property value), legal fees on both sides (£2,000–£5,000+), and potentially broker fees (0.5%–1.5%).

Eligibility for a Commercial Mortgage in the UK

Lenders assess several key factors when deciding whether to approve a commercial mortgage application in the UK:

Trading history and accounts. Most mainstream commercial lenders require at least 2–3 years of filed accounts showing consistent profitability. Startups or businesses under 2 years old face a much more limited pool of lenders and will typically need larger deposits and specialist lenders. Self-employed applicants must provide SA302 forms and tax year overviews.

Deposit. The standard minimum deposit for a UK commercial mortgage is 25%–30% of the property’s value. For higher-risk properties (specialist use, lower demand locations) lenders may require 35%–40%. Some lenders will go to 80% LTV for very strong owner-occupied applications with excellent trading records.

Personal guarantees. Commercial mortgage lenders routinely require personal guarantees from company directors. This means that if the business defaults, the lender can pursue the director’s personal assets. Unlike residential mortgages, limited liability does not protect directors from personal guarantee obligations.

Property type and condition. Lenders assess the commercial property’s suitability, location, condition, and marketability. Standard property types (offices, retail, industrial, warehouses) attract the best terms. Specialist properties (petrol stations, pubs, care homes, restaurants) are treated as higher risk and require specialist lenders with sector expertise.

Types of Commercial Mortgage in the UK

Owner-occupied commercial mortgage. Used when a business buys its own trading premises — offices, retail unit, workshop, or warehouse. This is the most common type for SME borrowers. Lenders assess the business’s ability to make repayments from trading income. Terms of 10–25 years are typical.

Commercial investment mortgage. Used to purchase commercial property that will be let to tenants. Assessment is primarily based on the rental income (DSCR). Rates are slightly higher than owner-occupied, and maximum LTVs are typically 65%–70%.

Semi-commercial mortgage. Covers mixed-use properties combining commercial and residential elements — for example, a shop with a flat above. These require specialist lenders that can assess both elements. Rates are typically slightly higher than pure commercial.

Commercial bridging loan. Short-term finance (1–18 months) used to purchase commercial property quickly — for example, at auction — before arranging longer-term finance. Costs 0.75%–1.5% per month. Should only be used when a clear exit strategy (refinance or sale) is in place.

Interest-Only vs Capital & Repayment: Which Should You Choose?

Commercial mortgages in the UK are available on both interest-only and capital & repayment (amortising) terms. The right choice depends on your cash flow requirements and investment strategy:

Capital & repayment means each monthly payment covers both interest and a portion of the loan principal. At the end of the term, the mortgage is fully repaid and you own the property outright. Monthly payments are higher but total interest cost is lower. This is the standard choice for owner-occupiers buying their business premises.

Interest-only means monthly payments cover only the interest, with the full loan balance remaining at the term end. Monthly payments are lower (typically 20%–40% less than repayment), which improves cash flow — valuable for investment properties where rental income is the primary yield. However, you must repay the full loan at the end, either by refinancing or selling the property. Total interest cost over the term is significantly higher.

Tax implication. For commercial investment properties held in a company, mortgage interest is a deductible business expense against rental income, reducing corporation tax. This makes the effective cost of interest lower than the headline rate. Unlike residential buy-to-let (which has restricted mortgage interest relief under Section 24), commercial property investment faces no such restriction.

UK Commercial Mortgage Lenders: Who to Approach

The UK commercial mortgage market includes several tiers of lender, each with different risk appetites, criteria, and pricing:

High street banks (Barclays, HSBC, NatWest, Lloyds, Santander) offer the most competitive rates for strong, established businesses with clean credit histories. They typically require 2–3 years of profitable accounts, strong personal credit, and clean company financials. Decision-making can be slower (6–12 weeks) as cases go through commercial lending committees.

Challenger banks and specialist lenders (Shawbrook Bank, Aldermore, Together Financial, Hampshire Trust Bank, OakNorth) are more flexible with non-standard applications, shorter trading histories, and complex structures. They typically charge 0.5%–2% more than high street banks but can complete faster and accommodate more complex cases.

Commercial mortgage brokers are strongly recommended for most commercial mortgage applicants. A good broker will have relationships with 30–50+ lenders, can pre-qualify your application before submission (avoiding credit footprint damage from declined applications), and will typically secure better terms than approaching lenders directly. Broker fees typically range from 0.5%–1.5% of the loan amount, often payable on completion.