Commercial Mortgage Refinance UK: Costs and Timing

Commercial mortgage refinancing replaces an existing property loan with a new facility. It may change the rate, repayment structure or amount borrowed, but the decision should be based on total cost, affordability and your plans for the premises, not the monthly payment alone.

The reminder lands: your fixed rate is ending.

Perhaps the property is still right for the business. Perhaps you need more space, want to release equity or are considering an exit in a few years. Any of those changes can make the old mortgage structure less useful.

This is the point to review it properly. Waiting until the final weeks can leave you choosing between what is available quickly rather than what suits the business.

What is a commercial mortgage refinance?

A commercial remortgage normally involves replacing the existing facility, with the new lender settling the old loan. You might stay with the current lender or move elsewhere.

Owner-occupied premises and commercial investment property are different lending propositions. One relies heavily on the trading business; the other depends more on rental income, tenancy quality and the property’s investment characteristics.

For first-time purchases, our commercial mortgage guide covers the foundations. Refinancing adds a further question: what does it cost to leave the existing arrangement?

When should you start a commercial remortgage review?

Start several months before the current rate ends or the facility matures. That is a planning principle, not a promised completion time.

A valuation may need to be booked. The lender may request updated management accounts. Legal work can uncover title restrictions, lease issues or security held by another lender. If the property is specialised, the review may be more involved.

Ask the current lender what happens at expiry. Is there a follow-on rate? Does the loan mature in full? Must you give notice? These are contract questions, not assumptions.

Then ask your broker and solicitor to map the critical dates. Knowing the cost of a delay is part of knowing the cost of the refinance.

What affects commercial mortgage refinance terms?

• Affordability: the trading business’s cash generation or the property’s rental income.
• Loan-to-value: the proposed debt relative to the lender’s accepted valuation.
• Property quality: use, condition, location, marketability and any specialist features.
• Credit and conduct: payment history, existing borrowing and any issues that need explaining.
• Structure: term, repayment type, rate arrangement, security and intended use of released funds.

A higher turnover or a rising property value does not guarantee a better offer. Lenders need the whole picture.

The British Business Bank’s 2026 report describes a lending market with more challenger and specialist providers. More choice can help, but different credit criteria make like-for-like comparisons important.

Can refinancing release equity from business premises?

Potentially. A new facility may exceed the existing settlement balance, leaving money for an accepted business purpose after costs.

But property equity is not cash-flow evidence. A business still needs to support the larger debt, and the lender must agree the use of proceeds.

Before using the premises to fund machinery or a short working-capital gap, compare other options. Asset finance may align equipment borrowing with the equipment itself. Invoice finance may fit unpaid B2B invoices. Putting every funding need onto the property is not always the cleanest structure.

How do you compare the real cost?

Ask for a total-cost comparison over the same review period. Include interest, arrangement fees, valuation, legal work, searches and any broker fee that applies. Add the current lender’s settlement and early repayment charges.

Hypothetical example: a proposed refinance is expected to reduce interest by £4,000 a year. If switching costs are £12,000, the simple break-even is three years, assuming everything else stays the same.

That illustration is not a quote and ignores differences in repayment structure, remaining principal, rate changes and the time value of money. It shows why a cheaper rate can still be a poor switch if you plan to sell in eighteen months.

Compare the balance remaining at the end of your review period too. A lower monthly payment produced by a longer term is not the same as a lower total cost.

Repayment mortgage or interest-only?

A capital repayment facility reduces the outstanding loan over time. Interest-only can reduce monthly outgoings, but leaves capital to repay at the agreed point.

If an interest-only option is available, the repayment strategy needs to be credible. “We will refinance again” depends on future lender appetite, property value and business performance. None is guaranteed.

Match the structure to the business plan. A business intending to hold the premises for decades may have different priorities from an owner planning a sale.

What information should you prepare?

1. The current mortgage offer, rate expiry date and a recent statement.
2. A written settlement figure and details of any early repayment charge.
3. Recent accounts, management figures, bank statements and a debt schedule.
4. Property information, leases if relevant and details of existing security.
5. A forecast and a clear explanation of any equity release.

If trading has changed, explain it. A lender is more likely to understand a documented change than a gap between historic accounts and today’s application.

Refinance for the next stage, not just the next rate

The right deal should support what comes next: stable ownership, expansion, investment or an eventual exit. Flexibility and manageable obligations can matter as much as the rate.

Speak to Sorbus Finance about property finance options, or use the Business Finance Health Check to review the wider position first. Property used as security may be at risk if repayments are not maintained.

Sources and further reading

• British Business Bank: finance guidance and funding options
• British Business Bank: Small Business Finance Markets Report 2026

Sources checked on 12 October 2026. This article is general information, not a personal finance recommendation or tax advice. Finance is subject to status, affordability, lender criteria and agreement terms. Check current rules and obtain advice for your circumstances before committing.