What is a co-signer?

A co-signer is someone who signs a loan alongside the primary borrower and agrees to share legal responsibility for a loan, stepping in to repay it if the primary borrower can’t. 

Lenders may ask for a co-signer when the borrower has limited credit history or income because the co-signer’s stronger credit and income reduce the lender’s risk. That can help the borrower get approved, and it may also lead to better terms, such as a lower interest rate.

What you’ll learn:

• Co-signers agree to take the same responsibility as borrowers in a loan agreement and are legally obligated to take over any payments borrowers miss.

• Co-signers are most often added to mortgages, personal loans, auto loans and student loans.

• Most major credit card issuers don’t allow co-signers. But there may be similar options, like becoming or adding an authorized user.

• A co-signer arrangement can affect both the borrower’s and the co-signer’s credit.

A co-signer is a person who takes on responsibility for another borrower’s loan. If the borrower misses payments or defaults on the loan, the co-signer is legally responsible for making payments. That includes late fees and collection costs. But co-signers typically have no ownership rights to the funds or properties tied to the loan.

Generally, co-signers with strong credit can give lenders more confidence that the loan will be repaid. Specific requirements for co-signers can vary by lender, but most lenders will check a co-signer’s credit report as part of the application.

Both co-signers and co-borrowers share responsibility for repaying a loan. The key difference between them lies in their rights to the funds or property tied to that loan. 

Here’s how the rights of the two roles differ:

• Co-signers: Responsible for making payments if the borrower can’t pay, but they don’t have legal access to the property or money from the loan.

• Co-borrowers: Share payment responsibilities from the start of the loan and have equal rights to any property or money tied to the loan.

A co-signer may help if you think you’ll have trouble qualifying for a loan on your own because of issues like a low credit score or a high debt-to-income (DTI) ratio (how much of your monthly income goes to debt payments). 

Having someone with a positive credit history on the loan could make approval easier and may even get you better terms, like a lower interest rate.

Co-signers are common on mortgages, auto loans, personal loans, student loans and some credit cards.

Most major credit card issuers, including Capital One, don’t allow co-signers on credit cards. If you need help accessing credit, you could consider asking someone you trust if they would add you to their account as an authorized user. 

Authorized users might get their own card, but the primary cardholder is responsible for the account and for making on-time payments. If both people use the card responsibly, the authorized user could begin to build a positive credit history.

Co-signing can help build your credit and help a borrower qualify for a loan they might not have been able to access otherwise. At the same time, it can also leave you responsible for debt, hurt your credit scores, limit your future borrowing or strain your relationship with the borrower.

Here are some potential benefits of being a co-signer.

• It could improve your credit. If the loan appears on your credit report and there’s a record of on-time payments, being a co-signer could have a positive impact on your credit score.

• You could help someone access credit. If a family member or friend can’t qualify for a loan or credit on their own, having you as a co-signer might make approval possible.

There are also some potential risks to consider for co-signers.

• You’re responsible for unpaid debt. If the borrower misses a payment, you’ll become responsible for it. If the borrower stops paying altogether, you may have to repay the full debt amount. 

• It could hurt your credit scores. Any negative information reported to credit bureaus, such as late payments or debts sent to collections, could show up on your credit reports.

• It could impact your future borrowing. Becoming a co-signer could change your DTI ratio and credit utilization (how much of your available credit you’re using). Both could affect future loan approvals or terms.

• It could affect your relationship with the borrower. Shared financial responsibility can cause stress, and you’ll be tied to the borrower for the life of the loan, even if your relationship changes.

Whether you’re looking to secure a loan, qualify for an apartment or step up to help someone else build their financial future, co-signing can open critical doors. If you have questions beyond the basics, these frequently asked questions might help you learn more.

Having a co-signer can help a borrower qualify for certain loans and may lead to better terms. In return, the co-signer takes on the same legal responsibility to repay the debt.

If you’d like to apply for a credit card but think you may need a co-signer, you could first see if you’re guaranteed to be approved before accepting a card offer.