Commercial mortgage deposits are the amount you contribute towards buying or refinancing a commercial property.

The lender provides the remaining amount, subject to its maximum loan-to-value limit and underwriting assessment.

The required deposit is not determined by one fixed rule. It can vary depending on the property, business, borrower, loan purpose, and lender.

A larger deposit may reduce the lender’s exposure. However, deposit size alone will not guarantee approval.

The lender must still be satisfied with the property, the repayment plan, the affordability, and the source of funds.

At a Glance

• Commercial mortgage deposits commonly start from around 25% to 30%.
• Some cases require a larger contribution.
• Your deposit determines the mortgage loan-to-value.
• Lower LTV borrowing may provide access to wider lender options.
• Lenders must understand where the deposit came from.
• Purchase costs must usually be funded separately.
• Property value, business performance, and repayment strength remain important.
• A larger deposit cannot compensate for an unsuitable property or weak repayment case.

What Is a Commercial Mortgage Deposit?

A commercial mortgage deposit is the part of the property cost that you fund yourself.

For example, consider a commercial property priced at £400,000.

You might contribute £120,000 and apply for a £280,000 mortgage.

That arrangement would produce a 70% loan-to-value.

Your deposit would represent 30% of the purchase price.

The deposit forms part of the purchase funds. It is not normally held separately by the lender after completion.

The lender takes legal security over the property for the amount borrowed.

You can read more about the broader borrowing structure in our commercial mortgage guide.

How Much Deposit Do You Need for a Commercial Mortgage?

Commercial mortgage deposits often start from approximately 25% to 30% of the property value.

However, lenders may require 35%, 40%, or more in higher-risk cases.

The required amount may depend on:

• Whether the property will be owner-occupied or rented.
• The property’s location and condition.
• The strength of the business or rental income.
• Your trading history and experience.
• The property’s specialist nature.
• The remaining lease length.
• Your credit profile.
• The requested mortgage term.
• The proposed repayment method.
• Whether additional security is available.

A standard office with broad resale demand may attract different terms from a specialist care facility.

Likewise, an established business may receive different terms from a newly formed company.

Therefore, the deposit percentage should be treated as an initial planning figure, not a guaranteed lending limit.

How Is Commercial Mortgage Loan-to-Value Calculated?

Loan-to-value compares the proposed mortgage with the property value.

The calculation is:

Mortgage amount ÷ property value × 100 = LTV

For example:

A smaller mortgage relative to the property value creates a lower LTV.

Lower LTV borrowing can reduce the lender’s exposure if the property must be sold following default.

However, the lender will still consider affordability, marketability, and property suitability.

Use our commercial loan calculator to test mortgage amounts and estimated repayments.

Calculator results are estimates. They do not represent a mortgage offer.

Does the Lender Use the Purchase Price or Valuation?

Commercial lenders commonly assess LTV against the lower of the purchase price or valuation.

Suppose you agree to buy a property for £500,000.

The lender’s valuation later places the property at £450,000.

A lender offering 70% LTV may base its mortgage on £450,000.

The maximum mortgage would then be £315,000.

You would need to cover:

• The difference between the purchase price and valuation.
• The remaining deposit.
• Tax and legal costs.
• Valuation and lender fees.
• Any required repair or refurbishment costs.

A down valuation can therefore increase the cash needed to complete.

This is why a deposit calculation should include a contingency rather than relying on the agreed price alone.

What Determines the Required Commercial Property Deposit?

Property type

Lenders assess how easily the property could be reused, let, or sold.

Standard offices, shops, warehouses, and industrial units may have broader lender demand.

Highly specialised premises can require larger deposits.

Examples may include:

• Care facilities.
• Religious buildings.
• Public houses.
• Hotels.
• Restaurants.
• Petrol stations.
• Agricultural buildings.
• Properties with unusual construction.

The property may be suitable for your business but difficult for another occupier to use.

That difference can affect the lender’s risk assessment.

Owner-occupied or investment use

An owner-occupied commercial mortgage helps a business purchase premises for its own use.

The lender may examine:

• Business accounts.
• Management accounts.
• Bank statements.
• Profitability.
• Existing commitments.
• Trading history.
• Future cash-flow forecasts.
• The purpose of the purchase.

A commercial investment mortgage finances property rented to another business.

The lender may focus more closely on:

• Rental income.
• Lease length.
• Break clauses.
• Tenant financial strength.
• Rent review terms.
• Vacant possession risks.
• Property demand within the local market.

The same deposit may therefore produce different results across these two application types.

Business strength

A stable and profitable business may demonstrate stronger repayment capacity.

Lenders may review two or three years of accounts, although requirements vary.

New businesses may need to provide:

• A detailed business plan.
• Cash-flow forecasts.
• Evidence of relevant experience.
• Personal asset and liability statements.
• Additional security or guarantees.
• A larger deposit.

A larger deposit may support the case. It does not replace evidence that repayments are affordable.

Credit history

Commercial lenders may examine both business and personal credit records.

Recent missed payments, defaults, county court judgments, or insolvency events can restrict available options.

A lender may request a larger deposit where adverse credit increases perceived risk.

Specialist lenders may consider complex credit histories. Their pricing and security requirements may differ.

Property condition

A lender must be satisfied that the property provides acceptable security.

Serious structural issues, contamination, planning problems, or restricted access may affect lending.

A property needing extensive work may require bridging finance before a longer-term commercial mortgage becomes suitable.

Bridging finance is short-term borrowing. It requires a clear and credible repayment plan.

Where Can a Commercial Mortgage Deposit Come From?

The deposit must usually come from an acceptable and evidenced source.

Possible sources can include:

• Business savings.
• Personal savings.
• Retained company profits.
• Sale proceeds from another property.
• Equity raised against another property.
• A director’s loan.
• An inheritance.
• Investment from shareholders.
• A permitted gift.
• Additional secured borrowing.

Acceptance varies between lenders.

A lender may ask for bank statements, completion statements, loan agreements, or company documents.

This process helps establish the source of funds and the financial commitments attached to them.

Borrowed deposits require particular care. The additional repayments may reduce affordability.

The lender will also need to understand whether another party gains an interest in the property.

Funds should not be moved repeatedly between accounts without a clear record.

A simple and documented transaction history can reduce delays.

Can Existing Property Equity Replace a Cash Deposit?

Existing property equity may support a commercial mortgage application.

For example, a borrower might raise funds against another property and use those funds towards the purchase.

Another lender may consider taking additional security over an existing property.

This can reduce the immediate cash contribution. However, it increases the amount of property exposed to borrowing risk.

The lender will assess:

• The existing property value.
• Current secured borrowing.
• Available equity.
• Repayment costs.
• Ownership structure.
• Consent from existing lenders.
• The proposed legal charges.

Using property equity is not the same as buying without a deposit.

The lender is still relying on value or security contributed by the borrower.

For a broader comparison of mortgage types, visit the mortgages guide from Connect Lifetime Mortgages.

What Other Costs Must Be Funded?

The deposit is only one part of the required cash.

You may also need funds for:

• Stamp Duty Land Tax, where applicable.
• Lender arrangement fees.
• Broker fees.
• Property valuation fees.
• Legal fees.
• Searches and due diligence.
• Company or tax advice.
• Building surveys.
• Insurance.
• Repairs or improvements.
• VAT, where applicable.

Some lender fees may be added to the mortgage.

Adding fees increases the total borrowing and may affect LTV.

Tax treatment can be complex. Seek advice from a qualified tax professional before committing to a transaction.

Does a Larger Deposit Guarantee a Lower Interest Rate?

A larger deposit can create a lower LTV.

Some lenders price lower-LTV mortgages more favourably because their exposure is reduced.

However, interest rates are also influenced by:

• Property type.
• Business performance.
• Rental strength.
• Credit history.
• Mortgage size.
• Fixed or variable pricing.
• Repayment basis.
• Mortgage term.
• Lender fees.
• Wider funding conditions.

A lower rate does not automatically produce the lowest overall cost.

Arrangement fees, valuation costs, legal expenses, and early repayment charges should also be reviewed.

The most suitable option should fit the transaction and repayment plan, not only the headline rate.

Should You Use Your Entire Available Deposit?

Using every available pound may reduce the mortgage, but it can weaken business liquidity.

Commercial property owners often face costs after completion.

These might include:

• Repairs.
• Business rates.
• Insurance.
• Equipment.
• Staff costs.
• Professional fees.
• Fit-out works.
• Temporary loss of income.

A stronger deposit can help the lending case. However, insufficient working capital can create another financial risk.

The right contribution should balance lender requirements with operational resilience.

Capital has more than one purpose. Money placed into the property cannot always be recovered quickly.

How to Prepare Your Deposit Before Applying

Before approaching a lender:

1. Confirm the property price.
2. Estimate a realistic valuation range.
3. Calculate your proposed LTV.
4. Identify the exact source of every deposit payment.
5. Retain statements showing the funds accumulating.
6. Allow for purchase costs and possible valuation changes.
7. Review existing business and personal commitments.
8. Prepare current accounts and management information.
9. Check whether the property requires repairs.
10. Retain enough working capital after completion.

You should also prepare the documents required for the wider application.

Our guide explaining how to get a commercial mortgage covers the main application stages.

How Can a Commercial Mortgage Adviser Help?

Commercial lenders do not all assess deposits in the same way.

An adviser can review the transaction before a full application is submitted.

This can help establish:

• A realistic maximum LTV.
• Suitable lenders for the property type.
• Whether the deposit source is acceptable.
• The documents required.
• Whether additional security could be considered.
• The likely valuation approach.
• The fees attached to different options.
• Potential issues before valuation or legal work begins.

The objective is not simply to find the highest available LTV.

The mortgage must remain affordable and suitable for the property and business plan.

Speak to a Commercial Mortgage Adviser

A commercial mortgage deposit is not simply an entry requirement.

It determines the proposed LTV and affects how the lender views the transaction.

However, the deposit must work alongside the property, income, business, and repayment plan.

Preparing the funds early can make the application clearer and reduce avoidable delays.

Speak to Connect Mortgages before committing to a commercial property purchase or refinance.

Frequently Asked Questions About Commercial Mortgage Deposits

What is the minimum deposit for a commercial mortgage?

Commercial deposits often start near 25% to 30%.

Some lenders may require more because of the property, business, credit profile, or loan purpose.

Can I obtain a commercial mortgage with a 20% deposit?

Some lenders may consider an 80% LTV case, but availability can be limited.

The borrower, property, affordability, and security would need to meet the lender’s criteria.

Can I use a gifted deposit?

Some lenders may accept gifted funds.

They will usually require evidence of the source and confirmation of whether repayment is expected.

Can a director lend the deposit to a limited company?

A director’s loan may be accepted.

The lender will review the loan terms, company accounts, and effect on the business balance sheet.

Can I use another property as security?

Some lenders may consider additional security.

This can increase the assets at risk if the commercial mortgage is not repaid.

Are commercial mortgage deposits refundable?

A deposit paid under a purchase contract may become non-refundable after exchange.

Reservation fees, valuation fees, and professional costs may also be non-refundable.

Your solicitor should explain the contractual position before funds are committed.

Your property may be repossessed if you do not maintain repayments on a mortgage or other loan secured against it.