---
id: guide-0033
title: "When Do I Need a Co-Signer, and How Does It Work?"
category: guide
subtopic: cosigner
page_type: guide
source_url: "https://www.genesisofdownersgrove.com"
tags: ["financing", "guide", "credit"]
questions:
  - "do I need a cosigner for a car loan"
  - "how does a cosigner help me buy a car"
  - "what does a cosigner have to do"
  - "can a cosigner help me get better rates"
related: [finance-approval, loan-terms, first-time-buyer]
dealer: Genesis of Downers Grove
---

A co-signer is someone who agrees to take legal responsibility for your loan if you can't pay. Lenders ask for a co-signer when your credit is new, thin, or spotty-or when your income alone doesn't qualify you for the amount you want to borrow.

**How it helps:**
A creditworthy co-signer (often a parent, spouse, or trusted family member) uses their credit score and income to strengthen your application. This can mean approval on a loan you'd otherwise be denied, or approval at a better interest rate.

**What a co-signer does:**
Your co-signer doesn't put money down and doesn't own the car-but they're fully legally liable if you miss payments. Late payments hurt their credit too. So choose someone you trust, and make your payments on time.

**Next step:**
Our finance team at Genesis of Downers Grove can discuss whether a co-signer makes sense for your situation and walk you through the process. Give us a call at **(630) 598-9950** to explore your options-we're here to help you find a path to approval.