Joint mortgages for first-time buyers: what they are and your options

A joint mortgage is a home loan taken out by more than one person to buy a property together. For many first-time buyers, it can be a practical way to make a purchase achievable when one income alone doesn’t stretch far enough.

However, a joint mortgage is more than sharing the keys. You’re also sharing responsibility for repayments and the decisions that affect the home. This guide explains how joint mortgages work, the main ownership options, what lenders typically consider, and the practical routes that may apply if your circumstances change.

Related guides:

Buying specifically with a friend? See our dedicated guide: Joint mortgage with a friend for first-time buyers.
Looking for detail on how lenders assess joint income and affordability, income multiples, evidencing income, one-income applications and credit knock-on effects? Read our Joint income mortgages affordability guide.

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First-time buyer joint mortgage guide

What is a joint mortgage?

A joint mortgage is an application made by two or more borrowers who are named on the mortgage agreement. In many cases, the same people are also named on the property deeds.

Repayment responsibility is shared. If payments aren’t made, the lender can pursue the borrowers involved.
Ownership affects how value is shared. How equity is divided depends on the legal ownership structure.
Lenders assess each applicant. Affordability and risk checks are carried out for everyone applying, not just the household as a whole.

Joint mortgages vs tenants in common

When you buy with someone else, you’ll usually choose between two main legal ownership structures. This choice can influence how you split equity, what happens on death, and how future decisions are handled.

Joint tenants

With joint tenants, each person is treated as owning the whole property together.

Common implications include:

Equal ownership in practice (even if deposits weren’t equal)
Automatic transfer on death to the remaining owner(s)
Collective decision-making for changes affecting the property

Joint tenants are often chosen by couples in long-term relationships.

Tenants in common

With tenants in common, each person owns a defined share of the property.

Common implications include:

Shares can be equal or unequal (for example, reflecting different deposit contributions)
Your share can be left in a will
Your share can be sold or transferred separately in some circumstances

Tenants in common is often used where co-owners want the ownership split to reflect how the purchase was funded or where the relationship is less “couple-like” (for example, friends or family members).

Who can apply for a joint mortgage?

In principle, joint mortgages can be taken out with a range of people, such as:

partners or spouses
friends
siblings
other family members
parents (in some scenarios)

There isn’t a single “type” of applicant that automatically qualifies. What matters is whether each borrower meets the lender’s requirements and whether the overall application passes affordability and risk checks.

Do both applicants need to be first-time buyers?

For many first-time buyer incentives, lenders and HMRC generally treat the purchase as a combined application. In practice, that often means both joint applicants must be first-time buyers to access the most common first-time buyer benefits.

If one person has owned a property before, the couple may be treated as “returning property owners” for the purposes of certain reliefs. That can affect stamp duty outcomes and the range of deals available.

What if only one person is a first-time buyer?

In some cases, lenders may still offer products that consider one applicant’s first-time buyer status. However, the stamp duty position is usually less flexible, and it’s important not to assume relief will apply.

A broker can help map out the options based on your exact circumstances, including whether the way you structure ownership could make a difference.

Stamp duty and joint purchases: why it can be different

Stamp duty relief for first-time buyers is typically linked to whether the buyers are treated as first-time buyers for the transaction.

Where one joint applicant has previously owned a home, first-time buyer stamp duty relief may not apply. Even if the other applicant has never bought before, the purchase may still be treated as a returning-owner transaction.

Because stamp duty rules can be technical, it’s sensible to treat this as a “check early” item rather than something to leave until the last minute.

How joint mortgages can help first-time buyers

Joint mortgages are often considered when affordability is the main barrier.

Combining incomes

Because more than one person is applying, lenders may assess affordability using more than one income source. This can increase borrowing potential compared with what either person could typically achieve alone.

Combining deposits

Pooling savings can help you reach a deposit level that improves your loan-to-value (LTV) position. A better LTV can affect the range of mortgage products available.

Broadening lender options

If one applicant alone doesn’t meet affordability requirements, a joint application may open up more options, provided each applicant can satisfy the lender’s criteria.

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How much can you borrow with a joint mortgage?

Joint mortgages can allow higher borrowing than a single-borrower application, but the outcome isn’t simply “add the incomes together”. Lenders usually consider:

each applicant’s income and how reliable it is
monthly outgoings and existing commitments
credit history
the mortgage term and affordability stress-testing
the property and its valuation

Income may not be treated equally

Even when two people apply, lenders may apply different assumptions to different income types (for example, variable earnings or self-employed income). The most reliable income may carry more weight in affordability calculations.

The 4.5 to 5 times combined income rule of thumb

As a general rule of thumb, many borrowers see mortgage offers around 4.5 to 5 times combined income, though some products can allow higher multiples. The key point is that “how much you can borrow” is not just about income. It’s also about what you can realistically afford to repay.

How deposit requirements work for joint mortgages

A joint mortgage can make it easier to reach the deposit needed for the purchase.

Evidence of deposit

Lenders generally expect the deposit to be credible and properly evidenced. This commonly includes bank statements and documentation showing where funds came from.

Gifts and contributions

If part of the deposit is a gift, lenders may require that it meets their rules and is documented appropriately.

Unequal deposit contributions

If one borrower contributes more deposit than the other, it’s important to align the ownership structure with your intentions.

Tenants in common is often used where shares are intended to reflect different contributions.
Joint tenants may be less flexible if you want ownership to mirror unequal funding.

Typical deposit levels for first-time buyer joint mortgages

Many first-time buyer joint mortgages are available with deposits around 5%, although the best options can vary depending on the lender, the property, and your overall affordability.

As a general principle:

a larger deposit can improve your loan-to-value position,
and that can affect the range of products available and the pricing.

How credit profiles affect joint mortgages

With a joint mortgage, lenders look at each applicant’s credit profile.

This means:

a weaker credit history for one borrower can reduce the options available
missed payments can affect all borrowers because the mortgage is a shared commitment

If one applicant has adverse credit, it doesn’t always mean a joint mortgage is impossible, but it can narrow the lender pool and influence the terms that may be offered.

Review each applicant’s credit report before applying to check that the information is accurate.

Other factors lenders consider

Beyond income, deposit and credit, lenders may also consider:

Mortgage term and age limits

Many lenders apply maximum ages for taking out the mortgage and/or for it to be repaid by. This can affect the term you can choose, which in turn influences affordability.

Employment type and stability

If one applicant is self-employed or has variable earnings, lenders may request additional evidence and may apply more cautious affordability assumptions.

Property type and construction

Some property types or construction methods can be treated as higher risk, which can limit mainstream lender options.

Disadvantages and risks to consider

Joint mortgages are not only about affordability. They’re also about shared risk.

Potential downsides include:

Shared liability for repayments. If one borrower can’t pay their share, the lender can still pursue the other borrower(s).
Credit impact for everyone named. Payment issues can affect all applicants’ credit profiles.
Decision-making can become complicated. Selling, remortgaging, or making changes to the property may require agreement between co-owners.
Future relationship changes. Separation, disagreements, or changing priorities can create practical and financial challenges.
Incentive and eligibility complications. If one applicant has previously owned, it may affect first-time buyer outcomes.

Joint mortgage scenarios first-time buyers often ask about

Joint mortgage with a partner

This is common and can be straightforward, but it still requires careful planning around ownership structure, deposit contributions, and what happens if circumstances change.

Joint mortgage with parents or family members

Family support can help with deposit and/or affordability. Lenders may apply additional considerations around age, existing property ownership, and how any support is structured.

Joint mortgage with friends

Friends can apply together, but it’s especially important to agree clearly on:

ownership shares
repayment expectations
what happens if one person wants to leave the arrangement

Joint Borrower Sole Proprietor (JBSP) mortgages

In some cases, one person may be the legal owner while another supports the application financially without being named on the deeds. This can be relevant where the main buyer wants to retain ownership while still benefiting from additional income.

What happens if you want to change or exit a joint mortgage?

Joint mortgages can sometimes be restructured, but the route depends on your ownership structure, the mortgage lender’s requirements, and the practical options available.

Common exit or change scenarios include:

Selling the property and paying off the mortgage
Refinancing so one person can take over the mortgage
Buying out a co-owner’s share (where ownership is being transferred)
Dealing with separation or divorce, which may require agreement on ongoing repayments and ownership

If one co-owner dies, the outcome can differ depending on whether you are joint tenants or tenants in common.

Can you transfer a joint mortgage to one person?

It’s possible in some circumstances, but it’s not usually a quick or automatic process.

When you take out a mortgage jointly, both borrowers are responsible for the debt. To remove one person from the mortgage, the lender typically needs to be satisfied that the remaining borrower can afford the repayments on their own.

If the lender agrees, the property ownership may also need to be updated to reflect the new arrangement.

What if the remaining borrower can’t afford it?

If the remaining person cannot meet the affordability requirements, the options may be limited. In some cases, that can mean selling the property and starting again with a new mortgage.

Joint mortgage considerations that are easy to overlook

Ownership paperwork matters

Where shares aren’t equal, or where you want clarity about how value is split, solicitor-drawn agreements (often used alongside tenants in common) can help set expectations.

Mortgage protection and income risk

Some borrowers consider insurance to help manage certain risks, such as loss of income. Whether it’s suitable depends on individual circumstances and priorities.

Final thoughts

A joint mortgage can be a practical step onto the property ladder for first-time buyers who need to combine incomes and deposits to buy sooner. The most important factor is making sure the arrangement matches your long-term intentions, particularly around ownership shares, repayment responsibility, and what happens if circumstances change.

The products below illustrate first-time buyer purchase mortgages. They are not filtered for joint applications; availability depends on each applicant’s circumstances and the lender’s criteria.

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