About 1 in 4 Americans have cosigned a loan or credit card for someone else, according to CreditCards.com. Yet many cosigners don't fully understand what they're agreeing to — or the financial risk they're taking on.

A cosigner is someone who agrees to be equally responsible for a debt if the primary borrower doesn't pay. Having a cosigner can help you qualify for a credit card, loan, or apartment when you don't have enough credit history or income on your own.

But cosigning is a big commitment for both sides. Here's everything you need to know.

How Does Cosigning Work?

When you apply for credit and don't meet the lender's requirements on your own — maybe you have no credit history or a low income — a cosigner can strengthen your application.

The cosigner's credit history, income, and creditworthiness are evaluated alongside yours. If the cosigner has strong credit, the lender is more likely to approve your application because they have someone reliable to collect from if you default.

Once approved, both you and the cosigner are legally responsible for the debt. The account appears on both your credit reports. If you make payments on time, both credit scores benefit. If you miss payments, both scores suffer.

The primary borrower is expected to make all payments. The cosigner is the backup — they only need to pay if the primary borrower can't or won't.

When Do You Need a Cosigner?

Common situations where a cosigner helps:

• First credit card or loan. If you're building credit at 18 or have no credit history, lenders may require a cosigner.
• International students. Without a U.S. credit history or SSN, getting approved for credit is difficult. A cosigner with U.S. credit history can help.
• After credit damage. If your score dropped due to missed payments or collections, a cosigner can help you access credit while you rebuild.
• Private student loans. Many students need a cosigner because they lack income and credit history.
• Apartment leases. Landlords may require a cosigner if you don't meet income requirements or have limited credit.

Risks of Cosigning

For the Cosigner

Cosigning is one of the riskiest things you can do financially. Here's why:

• Full liability. If the borrower stops paying, the cosigner owes the entire balance. Lenders don't care about your arrangement — they'll come after whoever pays.
• Credit damage. Late payments show up on the cosigner's credit report too. One missed payment can drop a cosigner's score by 100+ points.
• Debt-to-income impact. The cosigned debt counts against the cosigner's debt-to-income ratio, which can make it harder for them to qualify for their own loans or mortgage.
• Relationship strain. Money disputes damage relationships. More than a third of cosigners report a negative impact on their relationship with the borrower.

For the Borrower

• Dependency. Relying on a cosigner doesn't help you build independent creditworthiness.
• Shared account. Your financial behavior directly affects someone else's credit.
• Limited control. Some lenders let the cosigner monitor the account or receive alerts, reducing your financial privacy.

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Cosigner vs Authorized User: What's the Difference?

These terms sound similar but work very differently.

A cosigner applies for credit together with the primary borrower and is equally liable for the debt. Both names are on the account. Both credit reports are affected.

An authorized user is added to someone else's existing credit card account. The authorized user gets a card but isn't legally responsible for payments. The account still appears on the authorized user's credit report, which can help build credit.

For credit building purposes, becoming an authorized user is lower risk. The primary cardholder keeps control, and the authorized user benefits from the account's positive history without legal liability.

Alternatives to Getting a Cosigner

If you can't find a cosigner or want to build credit independently, you have options:

• Secured credit cards. A secured credit card requires a refundable deposit that becomes your credit limit. No cosigner needed, and many don't require a credit check.
• Credit builder loans. A credit builder loan lets you build payment history without needing established credit.
• Student credit cards. Designed for people with no credit, student credit cards have lenient approval requirements.
• Credit cards for no credit. Some cards like the Firstcard credit builder are specifically designed for people starting from scratch.
• Rent reporting. Rent reporting services add your monthly rent payments to your credit report — no cosigner required.

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How to Remove a Cosigner

Many borrowers want to release their cosigner once they've built enough credit. Here's how:

• Refinance. Apply for a new loan or credit card in your own name, then use it to pay off the cosigned account.
• Cosigner release. Some lenders (especially student loan servicers) offer cosigner release after 24-48 months of on-time payments. Check your loan terms.
• Pay off the debt. The simplest option — once the debt is paid in full, the cosigner's obligation ends.

Frequently Asked Questions

Can a cosigner be removed from a credit card?

Most credit card issuers don't allow cosigner removal. You'd typically need to pay off and close the cosigned card, then open a new one in your own name.

Does cosigning build the cosigner's credit?

Technically yes — the account appears on their report. But cosigners typically already have good credit. The risk-to-reward ratio for the cosigner is poor.

What credit score does a cosigner need?

Most lenders want a cosigner with a score of 670 or higher. The better the cosigner's credit, the better the terms you'll receive.

Can a cosigner take over the account?

No. The cosigner has financial responsibility but not ownership. They can't close the account, make changes, or take the credit line away from the primary borrower.

What happens to the cosigner if the borrower files bankruptcy?

The cosigner remains fully responsible for the debt even if the borrower declares bankruptcy. The bankruptcy discharge protects only the borrower, not the cosigner.

Disclaimer: Lending requirements and cosigner policies vary by institution. This information is for educational purposes and does not constitute financial or legal advice.