Does a joint car finance application affect my credit score?

Applying for car finance with someone else usually puts the account on both your credit reports and links your files together. That link is called a financial association. It means a lender can look at the other person's credit history when you apply for credit, even if you apply in your name only¹.

The link is not a score in itself. You each keep your own credit report, but they become connected while the association lasts². What changes is what lenders see: your record of paying, and theirs, sit alongside each other. If the other person has a poor credit history, that can affect your score and your chances of being accepted for credit in future³.

The link also outlasts the car. Closing a joint account will not remove the link to the other person from your credit file, and a notice of disassociation can only be requested from the credit reference agencies if there is no other financial connection⁴. While a joint debt remains, there is no way to remove the financial link until the account is closed, repaid in full, or the other person's name is removed⁵.

A joint application puts the account on both credit files

When you apply for shared credit, you become financially associated on your credit report. You both still keep your own credit reports, but they become linked². A joint credit application is one of the ways a financial connection is created, alongside a joint account or product, or telling the agency you are financially linked⁸.

The practical effect is that the lender can have full access to your credit file in the same way it could if it were you applying for credit⁹. That applies to partners who are financially linked, and it applies whether the finance is in one name or two.

Car finance is not treated differently from other joint borrowing for this purpose. A joint loan usually links your credit report to theirs, and that is the financial association¹⁰. The same happens with a joint mortgage, where taking it out creates a financial link with the other person¹¹.

Two things follow. First, the account itself appears on both files, so both of you carry the record of it. Second, the association is a separate thing from the account: it is the link between your files, and it is what lets a future lender look at the other person's history.

Linked to your co-borrower: what a financial association means

A financial association links your credit files. That means your record of making reduced payments may affect the other person's credit file and their ability to get credit¹². It arises from joint credit applications, joint bank accounts or joint financial products, and it continues after divorce or separation⁵.

The link is not only about the account you took out together. Once you are associated, a lender will see your financial associate's name and may look at their credit information when deciding whether to lend you money, even if you are applying alone¹³. That is why a joint car finance agreement can shape what you are offered on a completely separate application later.

The reverse is also true. If your partner's credit score is low, that could impact yours too, making it harder for you to get credit, even if the joint accounts themselves are managed well¹⁴. A joint account ties your financial records together, which could impact your credit score and mean you might not be able to open new accounts or get credit in the future¹⁵.

It is worth being precise about what does not happen. Credit reference agencies should not include information about other people who happen to live with you in your credit report, even if you share a surname, unless a financial connection has been created⁸. Living at the same address is not the same as being financially linked.

How a shared account can affect your future borrowing

The effect on future borrowing runs in both directions: what you are offered, and what the other person is offered.

On your side, opening a joint account adds a financial link to the other person, so companies look at both credit histories, and a poor history might lower your chances of acceptance⁴. This may impact your future credit eligibility if the joint account holder does not have a good credit score¹⁷. A joint account can create a financial link with a partner which affects your own score¹⁸.

On their side, the same applies. If you take out a joint mortgage, you create a financial link between yourself and your fellow co-owners, and if one of you runs into financial problems, this could affect everyone else's credit rating, which could make it difficult for you to borrow in the future¹⁹. Lenders will run a credit check on each applicant before granting a mortgage, and if one party has a poor credit score, it could impact the lender's decision¹¹.

A good payment history works the other way. Having a good payment history towards joint debts helps both people named on the account and can make it easier to get credit in future¹.

One point that catches people out: your partner's poor credit does not always affect you, even if you are married or in a civil partnership. It affects you when you have a joint account, loan or credit card with them³. Marriage alone does not create the link; shared borrowing does.

How a joint application links two credit files and what a lender sees.

What happens if the other person misses payments

Missed payments are marked on both credit files, regardless of who missed the payment¹. If a payment is missed, this will be recorded on your credit file as well as your ex-partner's credit file⁵. A missed mortgage payment will show up on both credit reports, regardless of whose fault it was¹¹.

The same rule applies to car finance. Continuous non-payment can result in formal notices of arrears, and, after 3 or 4 missed payments in a row, a default notice²⁰. The lender may issue a default notice if you keep missing payments, and can then take further action to collect the debt and recover the car, possibly using a debt collection agency or applying for a county court judgment (CCJ)²¹.

A default leaves a mark. Your credit file will show that you did not make your agreed payments, which impacts your credit score²². Missed payments go on your credit file and can make it harder to get credit in future and to remortgage²³.

There is a limit to how far the damage spreads. If your ex-partner falls behind on repayments to credit debts that only they are liable for, these missed payments will be recorded on the credit file of the liable person only, and do not show on your credit file⁵. The shared record follows shared liability.

If you agree a payment holiday or forbearance with the lender, be aware that any payment you miss during forbearance is recorded on your credit file and could make it harder to get credit in the future²⁴. Stopping payments without agreement is treated as a missed payment by the provider and the credit reference agencies²⁵.

Can I remove the link to a co-borrower from my credit file?

Not while the debt is running. If you still have a joint debt, there will be no way to remove the financial link until the account is closed, repaid in full, or the ex-partner's name is removed. For a loan, that means only once it is repaid in full; for a bank account, it is usually only likely if there is no overdraft to repay⁵.

Once the debt has ended, a notice of disassociation can be requested from the credit reference agencies. This takes any financial link with your ex-partner off your credit file²⁶. Closing a joint account on its own will not remove the link to the other person from your credit file⁴.

There is a limit to what disassociation does. Even if you disassociate, the account will still show on both your credit reports⁶. Disassociation ends the link between your files; it does not erase the history of the account itself.

If you are separating, the order matters. Deal with the joint debt first, because the link cannot be broken while it exists. If you have a joint debt with your ex-partner, for example a mortgage or a loan, your credit files are connected, and how you manage those debts will affect your ex-partner if they apply for credit, and vice versa¹⁶.

Does a joint mortgage affect your credit score in the same way?

Yes. The mechanism is the same as car finance: taking out a joint mortgage creates a financial link with the other person¹¹. Once you link your finances, your credit profiles become connected, and one person's poor credit or financial habits could affect your application and impact each other's credit score²⁷.

The difference is scale and duration. A mortgage is typically larger and longer than car finance, so the link lasts longer and the sums involved are bigger. Lenders will run a credit check on each applicant before granting a mortgage, and if one party has a poor credit score, it could impact the lender's decision¹¹. A missed mortgage payment will show up on both credit reports, regardless of whose fault it was¹¹.

The same pattern appears across other joint borrowing. When you apply for joint credit with someone, such as an overdraft, joint loan or mortgage, your credit history will be linked to theirs²⁸. Things like bank accounts, mortgages and even utility bills could create a financial link between you and any joint account holders, which could impact your future credit eligibility if the joint account holder does not have a good credit score²⁹.

If you are applying for a mortgage with a friend or partner, the lender will consider their credit score too³⁰. And making several mortgage applications very close together could significantly damage your credit score, so a joint application that is declined and repeated quickly can compound the problem³¹.

Where to get help with your credit file

You can check your credit file through Experian, Credit Karma or Equifax⁷. Most now offer this service free of charge³². Checking it is how you find out whether a financial association is recorded and who it is with.

If you are trying to trace old car finance, the FCA suggests checking old bank statements, contacting the dealer where you got the car, or checking your credit file, which you can access for free through Experian and TransUnion³³. Equifax's Car Finance Checker includes most car finance records back to 2007³³.

If a joint debt is causing difficulty, free and impartial help is available. StepChange and National Debtline both publish guidance on joint debts, divorce and separation, and what happens when payments are missed. If you are dealing with a joint debt after a relationship ends, the guidance on dividing the family home and mortgage during divorce or dissolution covers how the debt and the property are handled¹⁶.

If you are worried about a joint account you already hold, the MoneyHelper guidance on joint accounts sets out the risks, including that it could damage your credit score if the other person has poor credit and that you could be responsible if they run up debt³⁴.