How To Add Someone To The Mortgage

Adding someone to a mortgage is not simply a matter of contacting your lender and updating a form. In most cases, it involves a Transfer of Equity, a formal legal process that changes the legal ownership of the property, as well as lender approval, a full affordability reassessment, and potentially Stamp Duty Land Tax on the transaction. 

See what our customers have to say about us

Key Takeaways:

• Adding someone to a mortgage almost always requires a Transfer of Equity, the formal legal process under the Land Registration Act 2002 through which legal ownership is changed at HM Land Registry.
• Your lender must consent to the change. Under the FCA’s mortgage conduct of business rules, lenders must reassess affordability when a borrower’s structure changes. This is not a formality.
• Stamp Duty Land Tax may be payable under the Finance Act 2003 if the incoming party assumes a share of the outstanding mortgage debt, even if no money changes hands.
• The total cost typically runs from £1,500 to £3,500, including legal fees, lender fees, and valuation, before any SDLT or early repayment charge.
• The process typically takes six to twelve weeks, depending on lender response times and the complexity of the title.
• Removing someone from a mortgage is the reverse process and requires the same lender consent. It is not easier than adding someone.

The two things that need to change, and why they are separate

The most important thing to understand before starting is that a mortgage and a property title are two distinct legal instruments. The mortgage is the loan agreement with your lender. The title is the legal record of ownership registered at HM Land Registry. Adding someone to one does not automatically add them to the other, and each requires a separate legal step.

Most people who want to add someone to their mortgage also want to add them to the title, giving them both financial responsibility and legal ownership. This is done through a Transfer of Equity combined with a lender consent application. In rarer cases, someone may be added to the title without being added to the mortgage, or vice versa, but both arrangements create complications that require careful legal advice before proceeding.

What is a Transfer of Equity?

A Transfer of Equity is the legal process by which the ownership of a property changes and someone is added to or removed from the legal title. It is governed by the Land Registration Act 2002 and requires a formal transfer deed, executed by the current owner or owners, and registration of the change at HM Land Registry.

Your conveyancer drafts the transfer deed, obtains the lender’s consent, handles any SDLT obligations, and registers the new ownership at HM Land Registry on completion. Without this process, the change is not legally effective. A verbal agreement or an informal arrangement between the parties does not transfer legal title and does not bind the lender.

Does SDLT apply when adding someone to a mortgage?

This is the most commonly overlooked aspect of the process and the one most likely to produce an unexpected cost. Stamp Duty Land Tax under the Finance Act 2003 is not only payable on outright property purchases, but it can also be triggered by a Transfer of Equity where the incoming party assumes responsibility for a share of the outstanding mortgage debt. HMRC treats the debt assumed as chargeable consideration for SDLT purposes.

Illustrative SDLT calculation on a Transfer of Equity

The SDLT position changes significantly if the incoming party already owns another residential property anywhere in the world; the 5% additional dwelling surcharge applies to the full chargeable consideration from the first pound. On a £200,000 outstanding mortgage where a 50% share is transferred, this produces a £5,000 SDLT bill that would not arise if the incoming party owned no other property. Your conveyancer must confirm the SDLT position before any documents are prepared, not after completion.

Do not assume SDLT is nil. Confirm it explicitly with your conveyancer before the process begins. An unexpected SDLT bill on completion is not recoverable from the lender or anyone else. It is a liability of the transaction.

For the full calculation methodology and current rates and thresholds, HMRC’s Stamp Duty Land Tax guidance is available at gov.uk/stamp-duty-land-tax, and your conveyancer will confirm how it applies to your specific transaction before any documents are drafted.

Getting lender consent

Your existing lender must consent to the Transfer of Equity before it can proceed. Under the FCA’s mortgage conduct of business rules, lenders must reassess affordability when a borrower’s structure changes. The incoming party will be assessed as a borrower: credit history, income, employment stability, and the combined debt-to-income ratio of all parties will all be reviewed. There are three possible outcomes.

Here at Muve, the lender consent stage is where Transfer of Equity transactions most commonly stall. Some lenders respond within two to three weeks. Others take considerably longer, where additional underwriting is required. We submit the lender consent request as early as possible and chase consistently. The legal work can proceed concurrently, but completion cannot happen until consent is confirmed.

The step-by-step process

1 Instruct a conveyancer

A conveyancer handles the legal elements, drafting the transfer deed, obtaining lender consent, managing SDLT obligations, and registering the change at HM Land Registry. Both the current owner and the incoming party should have independent legal advice. Some lenders require evidence that all parties received independent advice before they will confirm consent.

2 Confirm the SDLT position

Before any documents are drafted, confirm whether SDLT applies and, if so, at what rate. This depends on the outstanding mortgage balance, the share being transferred, and whether either party owns other residential property. Do not proceed without this confirmation.

3 Apply for lender consent

Your conveyancer contacts the lender to request consent to the Transfer of Equity. The lender carries out their affordability assessment of the incoming party. This typically takes two to eight weeks, depending on the lender.

4 Draft and execute the transfer deed

Once lender consent is received, your conveyancer drafts the TR1 transfer form, the standard HM Land Registry transfer document. All parties sign. If a remortgage is required, the new mortgage offer must also be in place at this point.

5 Completion and SDLT payment

On the completion date, the Transfer of Equity is completed. Any remortgage funds are drawn down, and the existing mortgage is redeemed if required. SDLT is reported and paid to HMRC within 14 days of completion. Your conveyancer handles this as part of the transaction.

6 Registration at HM Land Registry

Your conveyancer submits the transfer deed to HM Land Registry to register the new ownership. The title register is updated to reflect both owners. Current Land Registry processing times mean registration typically takes several weeks to several months after completion.

What it costs

Typical cost ranges

Total (excluding ERC and SDLT where nil) – Typically £1,500 to £3,500

Joint tenants or tenants in common?

When adding someone to the title, you must decide how to hold the ownership. Joint tenants own the property as a single unit, or if one owner dies, their share automatically passes to the surviving owner, regardless of any will. Tenants in common each own a defined share that can be left to whoever they choose in their will.

The appropriate structure depends on the relationship between the owners, their respective financial contributions, and their estate-planning intentions. Where the shares are unequal, for example, where one party contributed a larger deposit, a declaration of trust recording each party’s beneficial interest should be prepared alongside the transfer deed. Your conveyancer can advise on the appropriate structure and draft the necessary documentation.

Key things to consider before proceeding

How Muve can help

Transfer of Equity is one of the most common transactions we handle alongside standard purchases and sales. The process is more involved than it first appears. The SDLT position needs to be confirmed before anything else. Lender consent can take longer than expected, and the mortgage change and title change need to be carefully coordinated so both can be completed simultaneously.

At Muve, we manage the lender consent process, draft the transfer documentation, handle the SDLT return, and register the new ownership at HM Land Registry, with clear updates throughout so you know exactly where the transaction stands. If you are considering adding someone to your mortgage and want to understand the full process and costs before you commit, speak with us before contacting your lender.

Get a free conveyancing quote within minutes.