Cosigner

Also called co-signer

A person who signs a loan alongside the main borrower and becomes legally responsible for the full debt if the borrower does not pay.

What it means

A cosigner lends their credit strength to someone who might not qualify alone, such as a student or someone with limited credit history. The cosigner usually gains no ownership of what is bought but takes on full liability for repayment.

The loan typically appears on both people’s credit reports. Late payments hurt both scores, the debt can make it harder for the cosigner to borrow, and the lender can pursue the cosigner directly. Some lenders offer cosigner release after a run of on-time payments, but terms vary. A co-borrower, by contrast, usually shares ownership as well as the debt.

Example

For example, a parent cosigns a $20,000 private student loan for a child. If the child stops paying, the lender can require the parent to pay the remaining balance, and the missed payments show up on both credit reports.

How it’s used

Helping a student or young adult qualify for a loan
Getting a lower rate than the borrower would receive alone
Renting an apartment with limited credit history

Strengths and weaknesses

Strengths

Can make approval possible for a borrower with thin credit
May lower the interest rate
On-time payments help the borrower build credit

Weaknesses

Cosigner is fully liable for the debt
Missed payments damage both credit scores
Can strain relationships and limit the cosigner’s own borrowing

Educational information only, not financial, tax or legal advice. Rules, limits and rates change; check the IRS, your lender or plan, or a qualified professional before acting.