Underwriting is the lender’s review of your application to confirm you can repay the loan and the home is worth enough to secure it. Most files go through an automated system first, then an underwriter checks your income, assets, credit and the appraisal, and issues a conditional approval listing what’s still needed. It usually takes a few days to two weeks within the 30 to 45 days to closing.
What underwriters review: the three Cs
- Capacity: your income and debt-to-income ratio; see the debt-to-income calculator.
- Credit: your scores and history; see credit score needed.
- Collateral: the appraisal and the property’s condition and title.
They also verify your down payment and reserves, check for large deposits and confirm your employment.
Automated vs. manual underwriting
Most conventional loans run through Fannie Mae’s Desktop Underwriter or Freddie Mac’s Loan Product Advisor, and FHA loans through FHA’s scorecard. The system issues a recommendation and a list of required documents. Files the system can’t approve may be manually underwritten, which usually has stricter debt ratio and reserve limits.
The steps
- Application and documents: see the document checklist.
- Automated findings and initial review.
- Appraisal and title ordered.
- Conditional approval: a list of conditions to clear.
- Clear to close once conditions are met; see conditional approval to clear to close.
How to keep underwriting smooth
- Send complete documents, every page.
- Explain large deposits and credit inquiries before you’re asked.
- Don’t change jobs, open credit, make large purchases or move money around.
- Answer requests the same day.
Getting underwritten before you shop
Some lenders will fully underwrite your file before you find a home, leaving only the appraisal and title. That can make your offer nearly as strong as cash; see competing with cash buyers.
Common questions
How long does mortgage underwriting take?
Often a few days to two weeks, depending on how complete your file is and the lender’s workload.
What do underwriters look for?
Your income and debts, credit, assets and reserves, and the home’s value and title.
Can I be denied after conditional approval?
Yes, if conditions can’t be met or something changes, such as new debt, a job change or a low appraisal.
Updated October 2026. Educational content. OfferBacked is not currently a lender and doesn’t issue pre-approvals or loans.