Should I Get a Cosigner to Purchase My First Home?

Last updated: September 2026 | Los Angeles & Orange CountyShould I Get a Cosigner to Buy My First Home?

A cosigner can help a first-time buyer qualify for a larger mortgage by adding their income and credit to the application, which lowers the combined debt-to-income (DTI) ratio. As of September 2026, the average 30-year fixed mortgage rate is around 6.7%–6.8%, and lenders have tightened qualification standards, which is exactly why cosigners have become more common. But a cosigner isn't free help: they become legally responsible for the loan, it shows up on their credit report, and FHA loans require a 25% down payment when the cosigner isn't a family member (versus 3.5% otherwise). For many Los Angeles and Orange County buyers, programs like CalHFA MyHome or ZIP down payment assistance are worth comparing before asking someone to cosign.

What Is a Mortgage Cosigner?

A mortgage cosigner is someone who adds their income and credit profile to your loan application without necessarily living in or owning the home. Lenders combine the cosigner's income with yours to calculate your debt-to-income ratio, and they typically use the lower of the two credit scores between the borrowers.

The cosigner does not need to occupy the property, but they are fully liable for the mortgage if payments are missed. That liability is the most important thing to understand before asking a parent, family member, or friend to sign.

Cosigner vs. Co-Borrower: What's the Difference?

These terms get used interchangeably, but they aren't identical. A cosigner (also called a non-occupant co-borrower on conventional loans) helps you qualify financially but typically does not take an ownership interest in the property. A co-borrower is usually on both the loan and the title, with full ownership rights.

Fannie Mae and Freddie Mac both allow non-occupant co-borrowers on conventional loans, and non-occupant co-borrowers do not have to be related to you by blood, marriage, or law on conforming loans. Fannie Mae allows up to 95% loan-to-value (LTV) with a non-occupant co-borrower on a one-unit purchase, and Freddie Mac's Home Possible® program allows up to 95% LTV as well.

How Does a Cosigner Help You Qualify?

Adding a cosigner can help in two main ways:

It can lower your combined debt-to-income ratio, since the cosigner's income is added to yours while your existing debts stay the same proportionally.

It can offset a lower credit score, since some loan programs use a blended or lower-of-the-two score, though guidelines vary by lender and loan type.

With average 30-year mortgage rates sitting around 6.7%–6.8% in September 2026, even a modest boost in qualifying income or credit score can be the difference between an approval and a denial, or between a manageable payment and a stretch.

Cosigner Rules by Loan Type

FHA Loans: FHA loans are popular with first-time buyers because they generally only require 3.5% down. However, if a non-family-member cosigner is added to an FHA loan, the down payment requirement generally increases to 25%. If the cosigner is a family member, the 3.5% down payment typically still applies.

Conventional Loans: Conventional loans backed by Fannie Mae or Freddie Mac allow non-occupant co-borrowers without a family relationship requirement, generally up to 95% LTV on a one-unit home, subject to full underwriting approval.

Because these rules can change and vary by lender, always confirm current requirements with your loan officer before assuming which down payment applies to your situation.

What Are the Risks of Having a Cosigner?

The mortgage appears on the cosigner's credit report and affects their own debt-to-income ratio, which can make it harder for them to qualify for their own financing later.

The cosigner is fully legally responsible for the loan if you miss payments, including potential damage to their credit and possible collection action.

Removing a cosigner later generally requires refinancing the loan in your name only, which depends on your qualifying on your own at that time, current interest rates, and home equity.

Family relationships can become strained if there are missed payments or disagreements about the property down the line.

Alternatives to a Cosigner

Before asking someone to take on that risk, it's worth comparing other paths to qualifying on your own:

CalHFA MyHome Assistance Program: Offers up to 3.5% of the purchase price for down payment or closing costs as a deferred loan.

CalHFA ZIP Program: Offers 2%–3% in zero-interest closing cost assistance, often paired with MyHome.

Building credit and paying down debt before applying, which can improve your DTI and interest rate without involving another person's credit.

Adjusting your target price range or considering a longer timeline to save a larger down payment.

Note: CalHFA's Dream For All shared appreciation program stopped accepting new applications in March 2026, so ask your lender which CalHFA programs are currently open before you apply.

Should You Ask Someone to Cosign?

This is a personal and financial decision that depends on your income stability, how confident you are in your ability to make payments long-term, your relationship with the potential cosigner, and whether you've fully explored down payment assistance and credit-building alternatives first. A conversation with a loan officer about your specific numbers, and with the potential cosigner about the real risks involved, should happen before signing anything.

Frequently Asked Questions

Does a cosigner have to live in the home? No. A cosigner (non-occupant co-borrower) does not need to occupy or own the property, but they are still legally responsible for the loan.

Does cosigning hurt the cosigner's credit? It can. The loan appears on their credit report and affects their own debt-to-income ratio, which may affect their ability to qualify for their own financing.

Can a cosigner be removed from the loan later? Generally only through refinancing the loan in the primary borrower's name alone, which depends on qualifying independently at that time.

Is it easier to get approved with a cosigner? It can be, since a cosigner's income and credit may help you meet DTI and credit score requirements you couldn't meet alone, but approval still depends on full underwriting.

What's the difference between a cosigner and a co-borrower? A cosigner (non-occupant co-borrower) typically isn't on title and doesn't have ownership rights, while a co-borrower is usually on both the loan and the title.

Thinking About Buying Your First Home in Los Angeles or Orange County?

Whether you're exploring a cosigner, down payment assistance programs, or want to know what you can qualify for on your own, I can help you compare your options and connect you with trusted lenders who can run your specific numbers.

Send me a message or leave a comment below — happy to help in English or Spanish.

Andrea Pazmino-Pace, REALTOR® — HomeSmart Realty Group
Serving Los Angeles and Orange County
Phone: (636) 590-1290
Email: andreapazpace@gmail.com
Website: askandreahomes.com
DRE #02013784

Important notice: This article is provided for general educational and informational purposes only and is not intended as mortgage, legal, or financial advice. Loan program rules, down payment requirements, and assistance program availability change and vary by lender. Buyers should consult a licensed loan officer, and legal or tax professionals as applicable, before making financing decisions.