Joint mortgages

A joint mortgage can let two people borrow more than either could alone. The rules on ownership structure, liability, and what happens on separation are worth understanding before you apply.

Last checked 13 September 2026. Editor: Kris · editorial standards

Seven sections. Each anchored to a first-party source, checked 13 September 2026.

1. Joint tenants versus tenants in common

You can hold a jointly owned property as joint tenants or tenants in common. Joint tenants own the whole property together: if one dies, the other automatically inherits the whole property under the right of survivorship. Tenants in common each own a defined share (which can be equal or unequal), and that share passes under their will or intestacy rules, not automatically to the other owner (GOV.UK — Joint property ownership). Most couples choose joint tenants. Investors, business partners, or couples with unequal contributions often choose tenants in common and record their shares in a declaration of trust.

2. How lenders assess joint applications

Most lenders add both applicants' incomes together and multiply by an income multiple (typically 4 to 4.5 times joint income). The affordability assessment under FCA rules also looks at both parties' committed spending, which means that debts in either name reduce the amount you can borrow together (MCOB 11.6). One party's poor credit history will usually affect the joint application, because the lender runs credit checks on both applicants.

3. Joint borrower sole proprietor

Some lenders allow a parent or other close relative to be added to the mortgage as a borrower without being named on the property title. Their income counts towards affordability; they do not own a share of the property. This arrangement can help buyers whose own income alone is insufficient. Note that if the supporting borrower already owns property, they may pay the additional-property stamp duty surcharge on the new purchase: check the stamp duty position with a solicitor before applying (GOV.UK — additional property SDLT).

4. Unequal deposits and tenants in common shares

If you contribute different amounts to the deposit, your ownership shares can reflect that through a tenants in common arrangement. A declaration of trust drawn up by a solicitor records each person's share precisely and how any proceeds should be split on sale. If the property is later sold at a loss, both parties remain jointly liable for the full mortgage balance.

5. Both names remain liable until the lender agrees to a change

Once both names are on a mortgage, both remain fully liable for the whole debt regardless of any private arrangement between you. A court order in divorce proceedings is not binding on the lender. The only way to remove one name is to obtain the lender's consent to a transfer of equity, which requires a new affordability assessment for the remaining borrower. If the lender declines, the options are to sell or keep the joint mortgage in place. See the divorce and mortgages guide for the full sequence.

6. What happens to the mortgage if one party dies

Under joint tenancy, the survivor takes full ownership and the mortgage continues in their name alone. Most lenders require the survivor to notify them and rewrite the mortgage into a sole name, which may trigger a new affordability check. Joint tenants and tenants in common should consider life insurance policies (term assurance or decreasing term) to pay off the mortgage on death: this is separate from the ownership structure and worth discussing with the broker at the same time as the mortgage.

7. What to tell your broker

Tell the broker at the start: both incomes and their sources, both sets of debts, both credit histories (good and bad), and whether you want joint tenants or tenants in common. A broker who knows the full picture can match you to a lender whose model suits your income mix. At the first meeting the broker must confirm the range of lenders it can access and any fee it charges (MCOB 4.4A.1R and 4.4A.8R).

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General information, not advice. Mortgage Brokers List is a directory and a set of free tools. Only an FCA-authorised adviser can recommend a mortgage for your circumstances. See our editorial standards.