College Planning & Financial Aid
General
Managing Money

The Role of a Cosigner in Private Student Loans: A Comprehensive Guide

August 18, 2025

A woman banker talking to a mother and her daughter.

Key Takeaways

  • Cosigners share full legal responsibility for loan repayment
  • On-time payments can build credit, while missed payments may harm both parties
  • A cosigner may improve approval odds and help secure lower interest rates
  • Cosigners complete their portion of the application after the borrower applies
  • Cosigner release may be available after consistent on-time payment

A cosigner on a private student loan shares equal responsibility for repayment, meaning they are legally obligated to make payments if the borrower does not. Because cosigners are legally responsible for the loan, it is important to fully understand the financial commitment before agreeing to cosign. On-time payments can positively impact both credit profiles, while missed payments may negatively affect both parties.

To cosign a student loan through LendKey, the borrower completes their portion of the application first, after which the cosigner receives an email link to securely provide their information and complete their section.

When it comes to pursuing higher education, the cost can often be a significant barrier for many students. While federal student loans can provide a lifeline, they might not cover all the expenses. This is where private student loans come into play. However, one common requirement that frequently arises with private student loans is the need for a cosigner. In this blog, we’ll delve into why a cosigner is often needed when applying for a private student loan and what it means for borrowers and cosigners.

Limited Credit History or No Credit History

One of the primary reasons lenders require a cosigner is the limited credit history of many young students. Unlike federal student loans, approval for private student loans is typically based on credit history and income. That means a credit check and income verification are performed to determine if an application can be approved.

Most college students have not had enough time to build a strong credit history, and it can also be difficult to meet income requirements while attending school full time. Private lenders assess both credit history and income to evaluate an applicant’s risk profile and ability to repay the loan. A cosigner with a solid credit history can help reduce that risk and increase the borrower’s likelihood of approval.

Lower Interest Rates

Having a cosigner with a strong credit history may lead to more favorable loan terms. Lenders are more likely to offer lower interest rates when a creditworthy cosigner is involved. This not only makes the loan more affordable but could also save borrowers a significant amount of money over the life of the loan.

Shared Responsibility and Communication

Choosing a cosigner can be a big decision. This arrangement encourages open communication about financial responsibilities, budgeting, and repayment plans. Both parties can work together to ensure that the loan obligations are met without causing undue stress.

What responsibilities does a cosigner have on a private student loan?

A cosigner is equally responsible for repaying the loan. This means if the borrower misses payments, the cosigner is required to make them. The loan will appear on both credit reports, so payment history can impact both individuals’ credit scores.

How do parents or guardians cosign a student loan through LendKey?

After the borrower submits their application, the cosigner receives an email invitation to complete their portion. They will provide personal, financial, and employment information as part of the credit review process.

Release of the Cosigner

Many private student loan lenders offer a cosigner release option. After a certain number of consecutive on-time payments and once the borrower demonstrates a strong credit history, the cosigner may be eligible to be released from the loan agreement. This feature encourages borrowers to build credit and take full ownership of their debt over time.

While applying for a private student loan with a cosigner may be an additional step in the process, it can offer numerous benefits to students seeking to fund their education. From improving approval odds to the potentially obtaining a lower interest rate, having a creditworthy cosigner could help set the stage for a successful financial future.


Please note that the information provided on this website is provided on a general basis and may not apply to your own specific individual needs, goals, financial position, experience, etc. LendKey does not guarantee that the information provided on any third-party website that LendKey offers a hyperlink to is up-to-date and accurate at the time you access it, and LendKey does not guarantee that information provided on such external websites (and this website) is best-suited for your particular circumstances. Therefore, you may want to consult with an expert (financial adviser, school financial aid office, etc.) before making financial decisions that may be discussed on this website.