What does an underwriter actually do?

They go through your file line by line—credit report, income docs, bank statements, job history, and the property details—to make sure you qualify under loan rules and that the loan makes sense for the lender.

Do underwriters call my employer?

They can. Most of the time it’s handled with written forms or electronic systems. But if something doesn’t match up—or if the file needs a final confirmation—they’ll call your employer directly.

How long does underwriting take?

A clean file can be turned in 2–5 business days. If docs are missing, pages are unclear, or new issues come up, it can take longer.

Can I still be denied after pre-approval?

Yes. Pre-approval is based on the information you provided. If new debts show up, your income can’t be verified, or deposits aren’t explained, the underwriter can deny the loan.

Do underwriters look at every bank statement transaction?

Yes. Every line is reviewed. They’re mainly looking for large deposits, overdrafts, transfers, or payments that weren’t listed on your application. Anything that stands out needs documentation or an explanation.

Why do they ask me for the same document more than once?

It doesn’t always mean something’s wrong. Sometimes the first copy was missing a page, blurry, or incomplete. Other times, guidelines require an updated version (like a new paystub). If an investor or auditor can’t clearly see it, the underwriter has to ask again.

What’s the difference between automated underwriting (AUS) and a human underwriter?

AUS is software that gives an initial “Approve” or “Refer” based on the data you entered. A human underwriter then checks your actual documents and has the final say.

Does my job history matter?

Yes. Lenders usually want a steady 2-year history. Switching jobs in the same line of work is fine. Changing industries or having long gaps may need extra documentation.

What happens if I make a big purchase while I’m in underwriting?

That new debt—like a car loan, credit cards, or even furniture—will change your debt-to-income ratio. It can reduce your approval amount or even cancel it. Always check with your lender before making big purchases.

When will I know I’m “clear to close”?

After the underwriter signs off on final approval and all conditions are met. That’s when closing docs get prepped, and your loan is officially ready to fund.

What Really Happens During Mortgage Underwriting

Blake Overton Mortgage Team
Sep 10
1 min read

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Underwriting is one of the most mysterious parts of the mortgage process—but it doesn’t have to be. Clients often wonder: “What actually happens once my file is submitted?”

In this episode of Mortgage Made Simple, I pull back the curtain on what underwriters really do and how their decisions shape your approval.

What Really Happens During Mortgage Underwriting

How underwriters evaluate your file – what they’re looking for in your financial details
The role of automated underwriting systems (AUS) – and where human review still matters
Common underwriting challenges – like large deposits, income verification, and document requests
Tips to keep the process smoother – so you can avoid delays and surprises

Why This Matters for Buyers

Underwriting is the step where your loan approval gets real. By understanding what’s happening, you can:

Plan your deposits and documentation ahead of time
Respond quickly to requests
Walk into closing with fewer surprises

Buying a home is already competitive—knowing how underwriting works is one way to keep the process on track.

Next Step

If you’ve got questions about what really happens during mortgage underwriting, or want to talk through what underwriters look for, Schedule a call with me:

Schedule A Call Here

Thank you,