Non-Occupant Co-Borrower in San Diego: Can a Parent Help You Qualify?
Quick answer: A parent can be a non-occupant co-borrower on a conventional loan without living in the home. Fannie Mae allows up to 95% LTV on a Desktop Underwriter file (5% down) and 90% on a manual file. Both people's income and debts count in the DTI. On a manual file the occupying borrower also needs a DTI of 43% or less on their own income.
What Fannie Mae says
Fannie Mae's Selling Guide, section B2-2-04, defines a non-occupant borrower as a credit applicant on a principal residence purchase who does not occupy the home, signs the note, has joint liability for it, and has no interest in the sale itself. That last part rules out the seller, the builder and the real estate agent. The non-occupant may or may not be on title. Fannie Mae allows this on purchases and on limited cash-out and cash-out refinances.
| DU loan casefile | Manually underwritten | |
|---|---|---|
| Maximum LTV | 95% | 90% |
| Occupying borrower DTI on own income alone | No separate cap | 43% maximum |
| First 5% of down payment | No separate rule in this section | From the occupying borrower's own funds, unless LTV is 80% or less or gift funds are allowed |
What it looks like on a San Diego purchase
Here is my own arithmetic using the Fannie Mae cap, not a quote. On a $700,000 purchase at 95% LTV, the loan is $665,000 and the down payment is $35,000. That loan is under the 2026 San Diego County 1-unit high-cost conforming limit of $1,104,000. At 90% LTV on a manual file, the down payment is $70,000.
The DTI math is the part people miss. Fannie Mae's DU job aid shows the ratio as total monthly debts divided by total income. A $2,401 monthly total over $8,912 income is 26.94% in their example. With a non-occupant, both people's income and both people's debts go in. If a parent still carries a mortgage or pays rent, that payment counts as their housing expense. A parent with a big mortgage of their own can lower your DTI picture instead of helping it.
Co-borrower or gift?
- Co-borrower: the parent's income helps you qualify, but they are on the loan, and it shows on their credit and DTI.
- Gift: the parent is off the loan, but only their money helps. See gift funds for a down payment.
FHA, VA and jumbo each have their own co-borrower rules, so ask us before you assume the same answer. First-time buyers can start at first-time home buyer San Diego or compare down payment paths.
Want to see if a parent on the loan helps? Send the price, both incomes and your debts at get pre-approved San Diego. Company NMLS 2394495. Amir Nurani NMLS 197458. Call (619) 366-9494.
Sources: Fannie Mae Selling Guide B2-2-04, Guarantors, Co-Signers, or Non-Occupant Borrowers. Fannie Mae Non-Occupant Borrower fact sheet (July 2019). Fannie Mae DU job aid, DTI ratio calculation questions.
Frequently asked questions
No. On a Fannie Mae loan a non-occupant borrower signs the note and shares liability but does not occupy the home. The occupying borrower must live there as a principal residence.
On a loan run through Desktop Underwriter, Fannie Mae allows up to 95% LTV, so 5% down. On a manually underwritten loan the cap is 90% LTV, so 10% down.
Yes, on a conventional loan the non-occupant's income and debts go into the combined DTI. Their own current housing payment is a debt too.
Often yes, and then the parent is not on the loan. A gift keeps their debts off the file but their income does not help you qualify. See our gift funds page.
Yes. Fannie Mae's fact sheet says the non-occupant borrower income is considered when deciding whether the loan meets the HomeReady income eligibility requirements.
Can a parent on the loan help you qualify?
Send the price, both incomes and your debts. We run the combined DTI and show you the co-borrower route next to a gift.
Get Pre-Approved(619) 366-9494 · Amir Nurani · NMLS #197458
Left Coast Leaders, Inc. · NMLS #2394495 · DRE #02191517 · Equal Housing Lender · San Diego County and Riverside County · San Diego, CA