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Adding someone to your mortgage, such as a partner or family member, usually means both a change to the mortgage itself and a change to who legally owns the property, known as a transfer of equity. Most lenders require this to go through a formal process, either as part of a remortgage or as a specific request to your existing lender, rather than simply updating paperwork informally. Both applicants’ income, outgoings and credit files are assessed as part of it.
How does adding someone to a mortgage work?
There are generally two routes. The first is arranging a full remortgage, where the new mortgage is taken out jointly from the start, often with a new lender. The second is asking your existing lender whether they can add a person to your current mortgage, sometimes without moving to a completely new deal, though not every lender offers this and it depends on their own process. In both cases, the new person usually also needs to be added to the legal title of the property, which is a separate legal step called a transfer of equity.
What does a lender check when you add someone?
| What is assessed | Why it matters |
|---|---|
| Combined income | Adding an earner can increase how much you can borrow, or change affordability if their income is lower |
| Combined outgoings | Any debts or commitments the new person has are added into the overall affordability picture |
| Both credit files | The lender checks both applicants, since both will be responsible for the mortgage |
| Legal ownership share | Your solicitor will set out how the property is owned, for example as joint tenants or tenants in common |
| Reason for the change | For example, a partner moving in, a parent being added to support affordability, or a family arrangement |
Do you need a solicitor?
Yes, in most cases. Because adding someone to the mortgage usually means adding them to the legal title as well, a solicitor or conveyancer needs to handle the transfer of equity alongside the mortgage change. This is also the point at which you would decide how you own the property between you, which can matter later on, for example if you separate or if one of you dies. Our guide on what a transfer of equity is explains this part in more detail.
What happens to your credit files?
Taking out a mortgage together, or being added to one, usually creates what is known as a financial association between your credit files. This means each other’s credit history can become relevant when either of you applies for credit in future, even on something unrelated to the mortgage. It does not combine your files into one, and if you later separate, you can ask the credit reference agencies to add a notice of disassociation, though this needs to be requested rather than happening automatically. Our guide on what a financial association is covers this in more depth.
Adding a partner with a lower income or no income
If the person you are adding has little or no income of their own, for example a partner who is not currently working, the lender will usually still assess the mortgage based mainly on the income that is there, and add the new person to the ownership and legal responsibility for the mortgage rather than to the affordability calculation in the same way. This is a common reason people ask about adding someone, alongside wanting joint ownership for other reasons such as fairness or estate planning.
Adding someone to a mortgage with adverse credit
If either of you has a CCJ, defaults, missed payments or another form of adverse credit, this is factored into the joint assessment rather than looked at separately from the rest of the application. A few things worth knowing:
- Both files are checked, not just the person applying to be added. If your partner or family member has adverse credit, this can affect a joint application even if your own file is clean, so it is worth checking what a joint mortgage with bad credit involves before assuming it will not be a problem, or that it definitely will be.
- A product transfer with an added name may still be possible with some lenders, though it is worth asking specifically, since not every lender offers this route and adverse credit can affect whether it is available.
- A specialist adviser can weigh the whole picture. Rather than approaching lenders one by one, an adviser experienced with joint applications and adverse credit can identify which lenders are more likely to consider your specific combination of income and credit history.
- If debts are part of the reason for adding someone, for example to support affordability while paying down other borrowing, it is worth reading about the risks of consolidating debt into a mortgage first, since this secures previously unsecured debts against the home.
- Free debt advice is available if either of you is struggling. MoneyHelper and National Debtline offer independent guidance, separate from any mortgage decision.
Adding someone to a mortgage is a significant legal and financial step for both people involved, so taking the time to understand both the credit assessment and the legal ownership side, rather than treating it as a quick paperwork change, will usually serve you better in the long run.
Frequently asked questions
Can you add someone to your mortgage without remortgaging?
Sometimes. Some lenders allow a name to be added through a product transfer or an internal process without moving to a new deal, though this varies by lender and is not always offered. A full remortgage or transfer of equity is the more common route, especially where the new person’s income is needed.
Does adding someone to a mortgage affect your credit file?
Yes. Once you have a mortgage together, a financial association is usually created between you on your credit files, meaning each other’s credit history can be considered relevant by lenders in future. This does not merge your files, but it does link them for lending purposes.
Can you add someone with bad credit to your mortgage?
You can apply to, but the lender will assess both of you, including their credit history. Depending on the type and age of the issue, this may narrow your choice of lenders or affect the outcome. A joint application with bad credit explains what lenders look at.
Do you need a solicitor to add someone to your mortgage?
Usually, yes. Adding someone to the mortgage often means adding them to the property’s legal title too, known as a transfer of equity, which needs a solicitor or conveyancer to handle correctly and to advise on any tax or legal implications.