Cosigning, explained in 5 minutes or less

By Kaydee Ambas, CFEI® | Published on July 8, 2026

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If you're thinking about helping a student access the funds they need for school, it’s important to understand exactly what cosigning means, how it impacts your credit, and what questions to ask before making the commitment.

This quick guide breaks it all down—clearly and without the jargon.

What is a cosigner?

A cosigner is someone—usually a parent, guardian, or trusted adult—who agrees to take joint responsibility for a student loan. If the student can’t make payments, the cosigner is legally responsible for the full balance.

Many private lenders require cosigners because most students haven’t yet built the credit history or income needed to qualify on their own.

Why would someone cosign?

Cosigning can help a student:

• Qualify for a loan they couldn’t get alone
• Access better interest rates or terms
• Build their credit with responsible repayment

With Earnest Private Student Loans, adding a cosigner can make you up to 5x more likely to be approved—and may help you qualify for a lower rate. It’s a powerful way to support someone’s education, but it’s important to understand the risks too.

What are the risks of cosigning?

Cosigning is not just a formality. It’s a financial commitment. Here’s what to keep in mind:

• If the student misses payments, it affects your credit too
• You may be responsible for payments if they default
• The loan balance will appear in your credit report and can impact your debt-to-income ratio

Pro tip: Look for a lender that offers clear borrower–cosigner tools, like shared access to statements and support if repayment becomes difficult.

Is there a way to be released as a cosigner?

Yes! Some lenders offer cosigner release after the student makes a certain number of on-time payments. Earnest will automatically review eligible loans for cosigner release, and primary borrowers who meet the criteria can also apply directly. This process removes the cosigner from the contract entirely, leaving the student 100% responsible for repayment while keeping the original interest rate and loan terms exactly the same.

As an alternative, students can also choose to refinance the loan entirely in their own name later on (if they qualify). Unlike a standard cosigner release, refinancing replaces the old contract with a brand-new loan. This gives the student a chance to adjust their repayment timeline or qualify for a lower interest rate based on their growing financial profile. Best of all, Earnest allows borrowers to apply to refinance again in as little as 30 days after disbursement, making it fast and flexible to drop a cosigner and optimize their debt.

What to ask before cosigning

Before you say yes, ask:

• Can I afford to take on this loan if needed?
• Do I understand the terms and repayment timeline?
• Will I have visibility into the loan while it’s being repaid?
• Does the lender offer flexibility or support?

Bottom line

Cosigning a student loan is a generous act—but it’s also a legal and financial responsibility. When both the borrower and cosigner are on the same page, it can be a smart way to fund education without surprises.

Looking for a transparent loan experience—for both borrowers and cosigners? Learn more about Earnest Private Student Loans.

About the Author

Kaydee Ambas, CFEI®

Kaydee Ambas is a Certified Financial Education Instructor℠ and the Content Marketing Manager at Earnest, where she leads content strategy that empowers borrowers to make confident, informed decisions about student loans. With work published by outlets like MSN, Yahoo! Finance, and SoFi, she brings a deep commitment to educational, empathetic content. When she's not writing, you'll likely find her painting in Golden Gate Park.

Disclaimer

This blog post provides personal finance educational information, and it is not intended to provide legal, financial, or tax advice. It is accurate as of its publishing date.

Earnest Private Student Loans are subject to credit approval.

Before applying for private student loans, it’s best to maximize your other sources of financial aid first. It’s recommended to use a 3-step approach to assembling the funds you need: 1) Look for funds you don’t have to pay back, like scholarships, grants, and work-study opportunities. 2) Next, fill out a FAFSA® form to apply for federal student loans options. 3) Finally, consider a private student loan to cover any difference between your total cost of attendance and the amount not covered in steps 1 and 2. For more information, visit the Department of Education website at studentaid.gov.