What Is Cosign?

To cosign is to sign jointly with a borrower for a loan. A cosigner serves as an additional repayment source for the primary borrower and as such, reduces the risk for the lender, helping the borrower obtain a loan.

A cosigner can also help a borrower obtain favorable loan terms that the borrower may have otherwise been unable to be approved for. They can also help the borrower increase the amount of principal that they can receive.

Key Takeaways

  • To cosign is to sign together with a borrower to help them get approved for a loan or to get better terms on a loan.
  • As cosigning is a type of joint of credit, the creditworthiness of both signers is evaluated when approving the loan and its terms.
  • In a cosigning arrangement, only the primary borrower will receive the loan and be responsible for payments.
  • If the primary borrower cannot pay back the loan the cosigner will be liable for the debt.
  • Co-borrowing is similar to cosigning, except that both individuals receive the loan and are liable for monthly payments.

Understanding Cosign

Cosigning is often an option that lenders will allow for a variety of different types of loans. It is considered a type of joint credit that is associated with either a cosigner or co-borrowing agreement.

A cosigner differs from a co-borrower in that the cosigner does not receive the principal on the loan, nor does the cosigner have to make regular monthly payments. Many lenders offer cosigning as an option on a variety of credit products, including personal loans, auto loans, student loans, mortgage loans, and more. Not all lenders allow for cosigners, so it's important to do your research before you pick out a personal loan if you know you'll need some help. Some credit cards may also offer borrowers the option to include a cosigner.

One of the most common examples of cosigning is a parent signing an apartment lease for their child. Though this does not involve any lending, many first time renters have difficulty obtaining an apartment, as they don't have a sufficient credit history or they don't make enough income to provide the landlord with some added comfort.

In these situations, a parent will cosign the lease, providing added comfort to the landlord, thereby allowing the child to obtain the apartment for rent. The parent will not be paying monthly rental payments but if the child is not able to make payments, the parent will be on the hook to do so, and if they do not, their credit history can be negatively impacted.

Cosigning Process

Cosigning can be a benefit for borrowers with low income or minimal credit history. Adding a cosigner can also improve the terms on a loan or increase the principal that a borrower is approved for.

In a credit application with a cosigner, a lender will require information on both the cosigner and the primary borrower. Both individuals will have to provide personal information that allows the lender to do a credit check. The underwriting decision and terms on a cosigned loan will be based on the profiles of both the cosigner and the borrower.

If a loan is approved with a cosigner then standard procedures will apply. The lender will prepare a loan contract that details the terms of the loan, including the interest rate and monthly payment schedule. Both the cosigner and the primary borrower must sign the loan agreement to allow for funds to be disbursed. Once the loan agreement is signed, the primary borrower receives the principal in a lump sum.

The primary borrower is responsible for making the monthly payments on the loan. If the borrower is unable to pay then the cosigner’s obligation comes into effect. The terms of the loan agreement will provide details and specific terms on when the cosigner will begin to be contacted. The cosigner may be immediately contacted if a payment is missed or they may only be responsible when a loan reaches default. Depending on the loan’s terms a lender may immediately begin to report payment delinquencies to credit bureaus for both the borrower and cosigner.


For joint credit in a co-borrowing agreement, both borrowers receive the principal and are responsible for making the payments. Similar to cosigning, a co-borrowing loan agreement will consider both applicants in the credit application and underwriting process. Similar benefits are also available in a co-borrowing agreement.

Since the terms of the loan consider both applicants, the underwriting process is more likely to assign a lower interest rate and higher principal. Generally, both parties involved in the agreement will have rights to the principal balance. As such, both parties are responsible for repayment obligations. Co-borrowing agreements are typically most common in a mortgage loan.

Many borrowers may consider both cosigning and co-borrowing as alternatives to applying for a loan individually. Co-borrowing is generally more efficient when both parties will utilize proceeds from the loan, such as in a mortgage.

Cosigning can be a better option than obtaining a loan individually when the loan is sought to support a specific goal such as education or credit card consolidation. Individuals entering into any type of joint credit agreement must understand their obligations, particularly as delinquencies and defaults from either a cosigner or a co-borrower can be reported to credit bureaus at any time.