Can You Demerge a Company That Owns Mortgaged Property? Lender Consent Explained

Quick answer: Yes, you can demerge a company that owns mortgaged property, but you will almost always need the lender's written consent first. The lender has security over the property and usually controls changes of ownership. The tax reliefs work whether or not there is a mortgage, but the debt can add stamp duty land tax (SDLT) cost and can derail the timetable if the lender is approached late.

Why the lender gets a say

When a company borrows against a property, the lender takes a legal charge over it. The loan agreement then adds promises (covenants). Three are relevant to a demerger:

• No disposal. The company promises not to sell, transfer or part with the property without consent. A demerger that moves the property to another company is a transfer.
• No change of control. The lender can call in the loan, or require new terms, if the ownership of the borrower changes. Moving shares between companies can trigger this even if the ultimate owners do not change.
• No new security or change of structure. Many facilities restrict reorganisations, mergers and the creation of subsidiaries.

A demerger can hit any of these. It does not matter that the same people own everything before and after. To the lender, the borrower or the security has changed.

Two ways a demerger can involve mortgaged property

The first question is whether the property itself moves, or only the shares.

The property moves to a new company. This is the usual capital reduction demerger. The new company becomes the owner, so the charge must be released, replaced or transferred. The lender needs to approve the new borrower and may re-underwrite the loan.

The shares move but the property stays put. If the property sits in its own company already, the demerger may move only the shares in that company, for example up to a new holding company or across to different shareholders. The lender's security is unchanged, but there is likely still a change-of-control provision.

Moving the shares and leaving the property where it is has other advantages. There is no new land transaction, and so no SDLT on a transfer. We cover this in our article on SDLT traps when demerging property.

What lenders usually ask for

Every lender is different, so treat this as a guide to the conversation, not a promise.

1. A clear explanation. What is changing, why and who ends up owning what.
2. The structure chart. Before and after, with the shareholders shown.
3. Financial information. Accounts, rental income and the loan-to-value position for the borrower after the change.
4. Guarantees. Existing personal or company guarantees may need to be confirmed or replaced.
5. Legal paperwork. A deed of release or substitution, new security documents, a legal opinion in some cases and Land Registry filings.
6. Fees. Many lenders charge for consent and for their own legal costs.

Lenders prefer certainty. Expect them to want to see the final steps, not just the idea.

The debt problem in a split

A second issue arises when the loan covers more than one asset, or where only some of the business is moving.

• Cross-collateral. The loan may be secured on several properties, or on the whole business. If one property leaves, the lender may need to re-allocate the debt.
• Debt following the property. If the debt moves with the property, the new company takes on the liability. If the debt stays behind, the old company is left with a loan against an asset it no longer owns. Neither works without the lender's agreement.
• Gearing. The company left behind, and the new one, each need to stand on their own. A lender may ask for the loan to be reduced or for more security.

SDLT and the mortgage

When property moves between companies, SDLT is charged on the chargeable consideration. If the buyer takes over the existing mortgage, the debt assumed can count as part of that consideration. The market value rule can also apply between connected parties.

That means the mortgage can increase the SDLT cost of a transfer that has no cash price. Reliefs such as group relief and reconstruction relief can remove the charge, but each has conditions, and group relief has a clawback if the companies leave the group within three years. The details are in our SDLT article. Do not assume the loan is irrelevant because no money changes hands.

The tax side is the same, with or without a mortgage

The capital gains reliefs do not depend on whether the property is mortgaged. Section 136 of the Taxation of Chargeable Gains Act 1992 protects the shareholders, and section 139 can treat the company's transfer as no gain, no loss. Clearance applications can be made to HMRC. Since 26 November 2025, a main purpose test applies to these reliefs, so the commercial reason should be recorded.

One further point. If the debt is restructured as part of the demerger, we also check how the interest is treated in each company afterwards.

Example: Hypothetical Ltd owns a trading business and a commercial building worth £1 million, secured by a £400,000 loan. The shareholders want to demerge the building into Property Ltd. The lender consents on three conditions: the loan transfers to Property Ltd, the shareholders' guarantees continue and a fee is paid. If the building moves and Property Ltd takes over the £400,000 debt, that debt may count as chargeable consideration for SDLT unless a relief applies. If the owners instead place the building in a company first and then move the shares, there may be no land transfer at all. The figures are illustrative only.

How to handle the timetable

Lenders are slow. HMRC clearances take up to 30 days from the application, or from the date HMRC receives the further information it asks for. The two should run in parallel.

1. Check the facility agreement and the security documents for consent triggers.
2. Approach the lender early, in outline, before the structure is final.
3. Make the lender's consent conditional on HMRC clearance, and the demerger conditional on the lender's consent.
4. Agree the form of the release and new security documents in advance.
5. Complete the steps in the order set by the tax and legal advice, not the lender's convenience.

Common mistakes

• Starting the legal steps before the lender has given consent in writing.
• Forgetting a change-of-control clause that is triggered by moving shares.
• Leaving guarantees unaddressed.
• Treating the debt as invisible for SDLT.
• Allowing the lender's timetable to push the demerger past a date that matters for a sale.

Talk to us about Capital Reduction Demerger

• Splits a business or takes property out of a trading company
• Needs no liquidator and no court application for a private company
• Reliefs and HMRC clearance usually make it tax-neutral

See how we help or book a free 20-minute call.

FAQs

Do I always need my lender's consent to demerge?

In practice, almost always. If the property moves, the charge must be dealt with. If only shares move, change-of-control or restructuring clauses often still apply. Check the facility documents first.

Can the mortgage move to the new company?

Yes, with the lender's agreement. The lender may treat it as a new loan, with fresh underwriting, a new valuation and new fees.

What if the lender refuses?

Options include refinancing with a new lender, repaying part of the loan, leaving the property where it is and demerging something else, or moving the shares instead of the property. Sometimes the cost of refinancing is larger than the tax benefit, and that is a reason not to proceed.

Does a mortgage affect the HMRC clearance?

Not directly. The clearance looks at the commercial reason and the tax steps. But the facts about the lender, the debt and the timetable should be given accurately in the application.

Can I demerge a buy-to-let company with a mortgage?

Yes, in principle. The same lender, SDLT and tax points apply. For the wider picture of property in company structures, see our service page on corporate restructuring.

Talk to us

If you have mortgaged property in a company and want to split it, we can work out whether to move the property or the shares, and plan the lender conversation alongside the tax. Book a call for a free 20-minute conversation with our team. You may also want our capital reduction demerger page.

Sources

• SDLT overview and rates: https://www.gov.uk/stamp-duty-land-tax
• SDLT: the amount used to calculate what is payable: https://www.gov.uk/guidance/stamp-duty-land-tax-the-amount-used-to-calculate-whats-payable
• SDLT group relief clawback: https://www.legislation.gov.uk/ukpga/2003/14/schedule/7/paragraph/3
• Reconstructions (ss136 and 139 TCGA 1992): https://www.legislation.gov.uk/ukpga/1992/12/section/136 ; https://www.legislation.gov.uk/ukpga/1992/12/section/139
• Share exchange clearance (s138 TCGA 1992): https://www.legislation.gov.uk/ukpga/1992/12/section/138
• Anti-avoidance for share exchanges and reorganisations (from 26 November 2025): https://www.gov.uk/government/publications/capital-gains-tax-share-exchanges-and-reorganisations/capital-gains-tax-anti-avoidance-for-share-exchanges-and-reorganisations
• Applying for statutory clearance: https://www.gov.uk/guidance/apply-for-statutory-clearance-for-a-transaction