The 1003 is the foundational document of every US residential mortgage origination. It’s the form a borrower fills out when they apply for a mortgage, capturing every data point an underwriter needs to evaluate the loan. The form’s name comes from Fannie Mae’s internal form number; Freddie Mac uses Form 65, but the two are functionally identical (the GSEs harmonized the format in 2021).
What the 1003 captures
- Borrower information — names, SSN, DOB, marital status, dependents, contact info, citizenship
- Employment and income — current employer, position, dates, monthly income, plus prior employer if less than 2 years
- Assets and liabilities — bank accounts, retirement accounts, investment accounts, credit card debt, auto loans, student loans, child support, alimony
- Real estate owned — properties currently owned, mortgages on them, rental income
- Property and loan details — subject property address, purchase price, loan amount, term, rate type
- Declarations — bankruptcies, judgments, defaults, citizenship, intent to occupy
Where the 1003 lives in the loan process
The borrower completes the 1003 at application. The data flows into the LOS where the loan officer or processor verifies, documents, and submits to underwriting. The 1003 is updated throughout the loan as new information surfaces (employment verification, asset documentation, appraisal). The final 1003 is part of the loan file delivered to the investor.
Digital 1003 in modern POS systems
Most mortgage operations in 2026 use a digital 1003 within their Point of Sale (POS) system. Borrowers fill out the application on their phone or laptop. The data flows directly into the LOS without manual reentry. Conditional logic skips irrelevant questions (a salaried borrower never sees self-employment questions). This is a meaningful borrower-experience improvement over paper or static-PDF 1003 workflows.
