Whether to take a mortgage jointly with someone or in your sole name is an important decision with real consequences. This guide explains joint versus sole mortgages: what each means, how they affect borrowing and liability, the ways to own jointly, and how to decide which suits you.
What a sole mortgage is
A sole mortgage is taken out by one person, who is solely responsible for the payments and usually the sole owner of the property, as our guide to what you can borrow explains. So with a sole mortgage you have full control and full responsibility, but your borrowing is limited to your own income. A sole mortgage suits those buying alone, or who prefer sole ownership and responsibility for their home.
What a joint mortgage is
A joint mortgage is taken out by two or more people together, who are jointly responsible for the payments, as our guide to joint mortgages explains. Joint mortgages are common for couples and others buying together. So a joint mortgage shares both the borrowing and the responsibility, combining incomes to borrow more while making everyone liable, which is the central feature to understand.
How they affect borrowing
A joint mortgage usually allows more borrowing than a sole one, since lenders consider the combined incomes of all applicants, helping you afford a more expensive home, as our guide to affordability relates. So if you need to borrow more than your own income allows, a joint mortgage (or an arrangement like a joint borrower sole proprietor) can help. This greater borrowing power is a key reason people choose joint mortgages.
Shared liability
With a joint mortgage, all borrowers are jointly and severally liable, meaning each is responsible for the whole payment, not just their share, so if one cannot pay, the others must, as our guide to joint borrower sole proprietor relates. So a joint mortgage ties you financially to the others. Understanding this shared liability is essential, as it means you depend on each other to keep the mortgage paid.
Ways to own jointly
Joint owners can hold a property as joint tenants, owning it together as a whole with the survivor inheriting automatically, or as tenants in common, owning distinct shares that can be left to others. The right choice depends on your relationship and wishes. So when buying jointly, it is important to decide how you own the property, as it affects what happens to each person's share, particularly on death.
The sole mortgage trade-off
A sole mortgage gives you independence and full control, with no reliance on anyone else, but limits your borrowing to your own income and puts all the responsibility on you, as our guide to borrowing options relates. So a sole mortgage suits those able to borrow enough alone and who value sole ownership. Weighing this independence against the lower borrowing power helps you decide whether sole or joint is right.
Which suits you
Whether joint or sole suits you depends on your circumstances: buying with a partner or sharing the cost points to joint, while buying alone or preferring sole ownership points to sole. There are also middle options, like a joint borrower sole proprietor arrangement. So consider who you are buying with, how much you need to borrow, and how you want to share ownership and responsibility, ideally with advice, to choose the right structure.
An example of the difference
Suppose two partners each earn £30,000. Alone, one might borrow around £120,000 to £135,000, but together a joint mortgage might allow roughly £240,000 to £270,000, subject to affordability, letting them buy a more expensive home, as our guide to mortgage affordability explains. This example shows how a joint mortgage can roughly combine incomes to boost borrowing, which is often the main reason couples choose one.
Removing someone from a joint mortgage
Circumstances change, and sometimes one person needs to come off a joint mortgage, for example after a separation, which usually requires remortgaging into the remaining person's name, subject to them affording it alone, as our guide to remortgaging explains. So a joint mortgage is not always permanent, but changing it depends on affordability. Understanding how someone can be removed is useful, especially for those buying with a partner.
Joint mortgages and relationships
Because a joint mortgage ties people together financially, it is worth discussing openly what happens if circumstances change, such as a relationship ending or one person wanting to move, as our guide to joint mortgages relates. So a frank conversation beforehand is wise. Agreeing how you would handle changes, and how you own the property, helps avoid difficulty later if your situation or relationship changes.
Protecting each person's share
Joint owners, particularly those who are not a couple or who contribute unequally, sometimes use a legal agreement, such as a declaration or deed of trust, to record their shares and what happens if they sell or fall out. So your respective interests can be protected in writing. For friends, family or unequal contributors buying together, recording the arrangement clearly is a sensible safeguard worth taking advice on.
A middle option
Between a full joint mortgage and a sole one sits the joint borrower sole proprietor arrangement, where someone joins the mortgage to boost borrowing without becoming an owner, as our guide to joint borrower sole proprietor explains. So there are more than two options. This middle route can suit families helping a buyer, offering some of the borrowing benefit of a joint mortgage while keeping the property in the buyer's sole ownership.
Getting advice
Because the choice between joint and sole, and how to own a property, has legal and financial consequences, advice from a broker and, on ownership, a conveyancer or solicitor is valuable, as our guide to conveyancing relates. So it is worth taking advice before deciding. Professional guidance helps you choose the structure that suits your circumstances and protects everyone's interests, particularly where people are buying together in less straightforward situations.
Choosing the right structure
The right choice depends on your circumstances: who you are buying with, how much you need to borrow, how you want to own the property, and your plans, as our guide to how much you can borrow relates. So weigh these together rather than defaulting to one. A little thought, and advice, about the structure that fits your situation helps you set up your mortgage and ownership on the right footing from the start.
There is no universally right answer between joint and sole; the best structure is simply the one that matches who you are buying with, what you need to borrow, and how you want to share ownership, so choose it deliberately and with advice.
In short
A sole mortgage is one person's, giving full control but limited to their income; a joint mortgage is shared by two or more, allowing more borrowing but with all jointly and severally liable for the whole payment. Joint owners can hold a property as joint tenants or tenants in common, which affects what happens to each share. Which suits you depends on who you are buying with, how much you need, and your wishes.
Where to get help and next steps
Read our guides to joint mortgages, joint borrower sole proprietor, and how much a first-time buyer can borrow. This is general information, not mortgage or financial advice.