A co-borrower signs the note, signs the deed of trust, and usually goes on title, so they owe the loan and own the house. A cosigner (Fannie Mae also says guarantor) signs the note and owes the debt, but isn't on title and doesn't own the house. Either way, their income can help you qualify, but their debts and credit score come along with it, and they're fully on the hook for the loan until it's paid off or refinanced. FHA and Fannie Mae both allow either role, with different rules, and in Texas a spouse who isn't on the loan still has to sign the deed of trust on a homestead.
Adding someone is often the first idea when income or credit falls short. It can work. Here's what each role means, how the underwriter treats a second person, the Texas rules for spouses, and the questions to answer before anyone pulls credit.
A home loan involves two main documents and one ownership record:
Every role below comes down to which of those a person signs or appears on.
HUD's current handbook says all occupying and non-occupying borrowers and co-borrowers must take title in their own name or a living trust, sign the note, and sign all security instruments (HUD 4000.1 II.A.1.b.ii(A)(4)). Co-signers are liable for the debt and must sign the note, but they don't hold an ownership interest and don't sign the security instrument (HUD 4000.1 II.A.1.b.ii(A)(5)). Non-occupying co-borrowers and co-signers must be U.S. citizens or have a principal residence in the U.S. (HUD 4000.1 II.A.1.b.ii(A)(6)).
When a borrower won't live in the home, HUD limits the loan-to-value more tightly. Family members get more room than non-family, but not when a family member is selling to a family member who'll be a non-occupying co-borrower, and not on a two- to four-unit property (HUD 4000.1 II.A.2.b.ii(B)). The exact limits show up on your Loan Estimate. When multiple borrowers have scores, HUD uses the lowest of their decision scores (HUD 4000.1 II.A.1.b.ii(A)(3)). See my FHA loans guide for the rest of the program.
Fannie Mae defines guarantors and co-signers as applicants who sign the note and share liability but don't have an ownership interest on title. Non-occupant borrowers sign the note and share liability, don't live in the home, and may or may not be on title. All three are allowed on purchases and on limited cash-out and cash-out refinances (Fannie Mae Selling Guide B2-2-04).
How Fannie treats that second person depends on how the file is underwritten:
Freddie Mac has its own non-occupying borrower rules in its Guide (Freddie Mac Guide 5103.1). Which agency's loan fits better depends on your numbers, so I run both.
VA and USDA each have their own rules on who can be on the loan and whether everyone has to live there. If you're thinking about a co-borrower on one of those programs, ask me first so we pick a structure the program actually allows.
Adding a person adds an entire second file:
Because the debts and score come with the income, adding someone doesn't always help. I run both people's numbers before anyone promises it'll work.
Texas adds two wrinkles for married buyers.
First, homestead law. Under the Texas Family Code, neither spouse can sell, convey, or encumber the homestead without the other spouse joining, whether the home is separate or community property (Texas Family Code 5.001). In practice, a non-borrowing spouse usually signs the deed of trust at closing. That signature consents to the lien. It doesn't put them on the note or make them a co-borrower.
Second, Texas is a community property state. On FHA, the lender has to pull a credit report for a non-borrowing spouse and count that spouse's debts in your ratios, except for obligations state law specifically excludes. HUD also says the non-borrowing spouse's credit history isn't a reason to deny the application (HUD 4000.1 II.A.4.b.i and II.A.4.b.iv(F)). Other programs handle this differently, so the guide for your loan decides.
The reverse question comes up just as often. One spouse may qualify better alone if the other has a low score, a recent credit event, or debts that outweigh their income. On many programs, the stronger spouse can apply alone on the income they have.
In Texas, the spouse who stays off the loan usually still signs the deed of trust because of homestead law, and on FHA their debts still count. Running the file both ways shows which structure works.
When two people take title, they also choose how. In Texas, if joint owners don't have a written survivorship agreement, a deceased owner's share doesn't automatically go to the other owner. It passes by will or by inheritance law (Texas Estates Code 101.002). Texas law allows written survivorship agreements between joint owners (Texas Estates Code Chapter 111). Married couples have community property rules on top of that.
Those choices are made with the title company and, when it matters, an attorney. I care who signs the note and who's on the deed. How you share the house between yourselves is a separate legal question worth answering before closing.
Once the note is signed, every signer is liable until the loan is paid off. A phone call to the servicer won't change that. Removing someone usually means refinancing into the remaining borrower's name, if that person qualifies alone, or, on some loan types, an assumption with the servicer's approval. A divorce decree that awards the house to one spouse doesn't by itself release the other from the note.
Coming off the deed is a separate step, usually a new deed recorded with the county clerk. Coming off the deed doesn't remove anyone from the note.
This example is made up to show how the roles play out.
Alex wants to buy a starter home in Saginaw. His income alone is a little short. His mom, who lives in Weatherford, offers to "co-sign." On FHA, she'd be a non-occupying co-borrower: on the note, on the deed of trust, and on title, with her income, her debts, and her score in the file. Her car payment and credit card balances eat into what her income adds, and her middle score is lower than Alex's, so the loan would be decided at her score. We run it both ways. In the end, Alex's file works with a smaller price range and a gift from his mom instead of her signature. She helps, and she isn't liable for 30 years.
Before anyone pulls credit, let me look at both people's income, debts, and scores side by side and show you whether adding someone helps, hurts, or isn't needed. Schedule a call, or when you're ready, start an application.
Links checked Oct 21, 2026.
About the author: McKade Lively, NMLS 2704474, American Pacific Mortgage Corporation dba True North Home Loans, NMLS 1850.
Equal Housing Opportunity.
Last reviewed: Oct 2026