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How Does Mortgage Underwriting Work? The Process Step by Step

By Ricky Khamis · November 9, 2026 · 3 min read

How Does Mortgage Underwriting Work? The Process Step by Step

Mortgage underwriting is the lender's review of whether to approve your loan. An underwriter checks four things: your credit, your capacity to repay (income and debts), your capital (down payment, closing costs and reserves), and the collateral (the home and its appraisal). The result is an approval with conditions, a request for more information, or a decline. On a clean file, initial underwriting often takes a few business days.

Step 1: automated underwriting

Most loans start with an automated system: Fannie Mae's Desktop Underwriter, Freddie Mac's Loan Product Advisor, FHA's TOTAL Scorecard through those systems, or VA and USDA equivalents. The loan officer enters your information and the system returns findings: approve or refer, plus a list of documents required to support the decision.

Automated findings are only as good as the data entered. A finding based on stated income that turns out wrong is not an approval. That is why an underwritten pre-approval, reviewed by a human before you shop, is stronger than an automated result alone. See Pre-Qualified, Pre-Approved, Underwritten.

Step 2: the underwriter reviews the file

A human underwriter then verifies everything the system assumed:

  • Credit: the report, any derogatory items, recent inquiries and new accounts.
  • Income: pay stubs, W-2s, tax returns, and whether the income is stable and likely to continue. Variable income is averaged.
  • Assets: bank statements, the source of large deposits, gift documentation, and reserves.
  • Debts: everything on the credit report and anything that is not, such as support obligations.
  • Property: the appraisal, title report, homeowners insurance, HOA or condo documents, and flood zone.

Step 3: conditional approval

Most approvals come back conditional: approved, subject to a list of items. Some are routine, like a signed purchase contract addendum. Others require an explanation or a document you have not yet provided. The speed of your closing depends mostly on how fast those conditions are cleared. See What Are Mortgage Conditions and How to Clear Them Fast.

Step 4: appraisal and title

The appraisal must support the value, and the title must be clear. A short appraisal changes the loan-to-value and can change the approval. See How a Home Appraisal Works and Appraisal Gap on an Arizona Contract.

Step 5: clear to close

When every condition is satisfied, the file is clear to close. The Closing Disclosure goes out, and you must receive it at least three business days before signing. See Closing Disclosure and the 3-Day Rule.

Step 6: final checks before funding

Shortly before closing, lenders commonly:

  • Re-verify employment, often with a verbal call to your employer within days of closing.
  • Check for new credit opened since the original report.
  • Confirm funds have not moved unexpectedly.

A new car loan, a job change or a large unexplained transfer at this stage can unwind an approval. See Pre-Approved, Then Denied.

How to make underwriting boring

  1. Disclose everything upfront: side income, child support, a pending divorce, a past bankruptcy.
  2. Send complete documents. See the Pre-Approval Documents Checklist.
  3. Answer condition requests the same day.
  4. Change nothing: job, accounts, credit, until you have keys.

Boring underwriting is the goal. Surprises are what move closing dates.

Why ask me

  • I answer the question before I sell you anything. If renting, waiting or a different program is the better move, I will say so.
  • Real numbers, not a calculator guess. I price your actual scenario, side by side, with the fees on the page.
  • Every program under one roof. Conventional, FHA, VA, jumbo, and non-QM options like bank statement, DSCR and asset-based loans, so the program fits you instead of the other way around.
  • You talk to the principal. Ricky Khamis is President of EPiQ Lending, NMLS #173141, lending in Arizona since 1999 and a 2025 Presidents Club Winner at CMG Home Loans. Direct line: (480) 999-9842.

EPiQ Lending is NMLS #1936984, at 7975 N. Hayden Road, Suite A-101 in Scottsdale. Verify all of it before you trust any of it: Ricky's EPiQ Lending profile, the Scottsdale branch, and the license itself at NMLS Consumer Access. Hold every lender to that standard, including us.

More plain-English answers in the Mortgage Education library.

Equal Housing Opportunity. This is general information, not a commitment to lend or an offer to extend credit. Program guidelines, eligibility requirements and documentation standards vary by investor and change over time. Rates, terms and program guidelines change and depend on credit approval, property appraisal and other qualifying factors. Not all applicants will qualify. This is not legal or tax advice; consult a qualified professional about your own situation.

Find out which program actually costs you less

FHA, conventional and jumbo price the same borrower very differently once the mortgage insurance is compared across the years you will own the home. Tell me the shape of your file and I will run them side by side.

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Looking at a specific home? Send me the address and I will run the numbers: rickykhamis.com/analyze

Ricky Khamis

Ricky Khamis

President, EPiQ Lending · NMLS #173141. Lending in Arizona since 1999. 82nd Airborne veteran. Straight answers, fast closings.

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