Semi-commercial mortgage deposits. Build the full budget.

How loan-to-value works

Loan-to-value (LTV) is the loan divided by the value used for lending, expressed as a percentage. For an illustrative £500,000 property and a £350,000 loan, the LTV is 70% and the balance is £150,000 before costs. This is arithmetic, not a lending offer.

If the lender’s accepted value is lower than the purchase price, you may need more cash. The maximum loan can also be restricted by income, independently of the advertised LTV limit.

Why there is no single minimum deposit

Lenders set their own property and borrower criteria. NatWest describes 25% as a typical commercial mortgage deposit guideline, but a guideline is not a universal mixed-use entitlement. Your property and proposed loan still need to qualify.

Do not use an advertised maximum LTV as the starting assumption for an unconditional purchase commitment. Establish what a lender is prepared to consider for your facts.

Budget beyond the purchase contribution

Separate the equity contribution from transaction costs. Ask which fees can be added to the loan and which must be paid upfront. Adding a fee to borrowing may increase interest costs and can affect the loan-to-value calculation.

• Valuation and any specialist reports.
• Your legal costs and any lender legal charges.
• Lender arrangement fees and any agreed intermediary fee.
• Applicable transaction tax, insurance and initial repairs.
• Cash reserves for vacancies and unexpected expenditure.

Treat tax as a separate assessment

HMRC publishes non-residential and mixed-property SDLT rules for England and Northern Ireland. Scotland and Wales have different property transaction taxes. A mortgage lender’s classification does not decide the tax treatment. Ask your solicitor or tax adviser to assess the actual purchase.

How much deposit do you need for a semi-commercial mortgage?

The useful question is how much cash your actual proposal requires after a lender has considered both value and income. A published maximum loan-to-value describes a limit under stated criteria; it does not promise that every mixed-use property can borrow up to it. Commercial use, borrower circumstances, property condition and rental income may all affect the amount considered.

Begin with the purchase price and a proposed loan amount, then establish the value that would be accepted for lending. The difference between price and borrowing is the contribution towards the purchase. Add the other completion costs and the cash needed to operate the property afterwards. This produces a more complete budget than multiplying the asking price by a generic deposit percentage.

What happens if the mortgage valuation is lower than the price?

Consider a hypothetical purchase price of £500,000 and a proposed loan limited to 70% of the value accepted for lending. If that value is £500,000, the arithmetic gives a £350,000 loan and £150,000 contribution towards the price. If the accepted value is £450,000, the same illustrative percentage gives £315,000 borrowing and £185,000 towards the agreed price.

The £35,000 difference is additional cash required before costs, unless the price or funding structure changes. This is an example of valuation risk, not an available 70% product or a prediction of what a valuer will conclude. A lender may also use a different basis under its terms, and income or other criteria may limit the loan further.

Can rental income limit borrowing even with a large deposit?

Yes. Loan-to-value measures the relationship between debt and value, whereas rental coverage looks at income against a lender’s assumed interest or debt-service amount. A property can have substantial equity but insufficient acceptable income for the requested mortgage. The assessment may take account of vacancies, lease terms, costs and the treatment of the commercial and residential parts.

For your own budget, identify the rent actually received and subtract the costs you bear. Keep estimated rent from an empty shop separate from contracted income. Then examine the effect of a void or repair. This does not reproduce a particular lender’s underwriting, but it helps avoid relying on a deposit figure while overlooking the ongoing cash needed to meet repayments.

What counts as the source of a deposit?

Explain where the money comes from and whether it carries any obligation to repay. Personal savings, retained company funds, sale proceeds, shareholder contributions and borrowing elsewhere are different arrangements. The finance discussion needs an accurate account rather than a label chosen because it appears easier. Evidence requirements will depend on the parties and the transaction.

If money is expected from another sale, distinguish funds already available from funds dependent on completion. If a director lends money to a company, explain that liability and its terms. If a gift or third-party contribution is involved, identify the arrangement when asked. Do not upload identity documents, bank statements or confidential third-party information to our initial enquiry form.

How do lender fees affect the cash requirement?

A fee paid upfront reduces the cash available for the purchase. A fee added to the mortgage increases the debt and may affect loan-to-value or interest costs. Confirm whether the quoted loan amount is gross of any deductions and how much money will actually be available at completion. This is especially important when funds must cover both a purchase and other secured debt.

For illustration, if a hypothetical £350,000 gross facility has a £5,000 fee deducted, only £345,000 remains before other deductions. If instead £5,000 is added above a £350,000 advance, the resulting debt is £355,000, subject to the agreed terms. These examples describe two different arrangements; they do not state our fees or any lender’s current product conditions.

Which purchase costs should be kept outside the deposit figure?

Ask for estimates covering your solicitor, any lender legal work, valuation and specialist reports where required. Establish the applicable transaction tax with your advisers and include insurance, immediate repairs and any agreed intermediary charge. Some costs may be incurred even if the mortgage or purchase does not proceed, so ask which payments are refundable and when.

For mixed-use purchases in England and Northern Ireland, HMRC publishes the relevant SDLT rules. Wales uses Land Transaction Tax and Scotland uses Land and Buildings Transaction Tax. A property’s mortgage classification does not decide its tax treatment. The current rules and the transaction facts need separate legal or tax advice, particularly where different interests or assets are acquired together.

How much cash should remain after completion?

There is no reserve amount on this website that guarantees a safe investment. Prepare a budget from the property’s actual obligations and your circumstances. Include mortgage payments, unrecovered service costs, insurance, maintenance and plausible void periods. A building with one major commercial tenant may face a different cash-flow pattern from several independently let units.

Test the effect of a higher assumed interest rate, a delayed letting and a repair in the same period. The purpose is to identify how much depends on optimistic assumptions. Money that is needed for day-to-day operation should not also be counted as immediately available for the deposit. A complete plan considers both completing the acquisition and continuing to meet the debt.

Does a bigger deposit always secure a better mortgage rate?

A lower loan-to-value may alter the products a lender considers, but it does not guarantee approval or the lowest total cost. Property type, income, credit position, ownership and loan size remain relevant. The rate is also only one part of the price: arrangement fees, repayment structure and exit terms can change the comparison.

Compare proposals on the same basis and do not commit all available liquidity solely to reach a percentage threshold. The appropriate balance between deposit and reserves depends on the transaction and your circumstances. We provide general information here, not a recommendation for a particular investment or debt level. Any finance proposal requires individual consideration.

What deposit details should you include in an enquiry?

Tell us the purchase price or estimated value, loan requested, cash currently available and its source. Explain whether any funds depend on another sale, additional borrowing or a company transfer. Add the property use, rent, vacancies and intended ownership so the deposit figure can be understood alongside the rest of the proposal.

We only deal with non-regulated finance. If you or a related person will live in the property, explain that immediately so the appropriate route can be established. Where regulated funding is required, the requirement is referred to an FCA-regulated counterparty. Neither an illustrative deposit calculation nor an initial discussion confirms eligibility.

Common questions