What Underwriters Are Really Looking At

The Three Things Every Underwriter Checks

Underwriters do not just look at your credit score. They review your entire financial picture. Every underwriting decision comes down to three things: your ability to repay the loan, your history of repaying debts, and the value of the property securing the loan. Lenders call these capacity, credit, and collateral.

Capacity is your income compared to your debt. This is your debt-to-income ratio, or DTI. Fannie Mae guidelines allow a DTI up to 45% for most conventional loans, with some borrowers qualifying up to 50% when they have strong compensating factors like significant reserves or a high credit score. If your DTI is too high, the underwriter has no room to approve the file, regardless of other strengths. The CFPB provides a plain-language explanation of how lenders calculate and apply DTI on their debt-to-income explainer.

Credit means your history of repaying debts. Underwriters look at your score, but they also look at the story. One late payment from five years ago reads very differently from three late payments in the past year. The score matters. So does the pattern behind it.

Collateral means the home itself. The appraiser sets the value, and the lender only loans against that appraised number. If you agree to pay $410,000 but the home appraises at $390,000, you either renegotiate with the seller or cover the difference yourself. The lender does not absorb that gap.

What "Conditional Approval" Actually Means

Most approvals come back as conditional. That means the underwriter gave a preliminary yes but needs more documentation before clearing the file. Common conditions include a letter of explanation for a past credit event, additional pay stubs, or a written explanation of a large bank deposit.

Conditions are not a red flag. They are a normal part of the process. The issue is how fast you respond. A condition that sits unanswered for five days can push your closing by a week. In a competitive Colorado or Florida market where sellers are watching your timeline, that delay matters. Getting this wrong early can delay closing or change your loan options entirely, which is why it is worth talking through your situation before you go too far down a path.

The No-Go Zone: What to Avoid After Pre-Approval

The Moves That Kill Approvals

Here is where most buyers get into trouble. You have been pre-approved and everything feels good. But the underwriting process is not over until you close. Every financial move you make between pre-approval and closing is still part of the review.

The actions that most often delay or derail approvals:

Why the Window Between Pre-Approval and Closing Is So Dangerous

Pre-approval is based on a snapshot of your finances at a specific moment. If that snapshot changes, the approval can change too. The dangerous gap runs roughly 30 to 45 days. That is a long time to keep your finances frozen, but it is the most important stretch of the whole process.

Why Your Bank Statements Get More Scrutiny Than You Expect

What Underwriters Look for in Your Accounts

Underwriters review two to three months of bank statements. They look for two things: that you have enough money for the down payment and closing costs, and that the money has been there long enough to be considered stable. The second part is what surprises most buyers.

A large deposit that shows up right before closing raises a flag. The underwriter needs to know where it came from. Was it a gift? A personal loan? Proceeds from a sale? Each answer carries a different documentation requirement. A gift from a family member needs a signed letter stating that no repayment is required. Money from someone else that has to be paid back can affect your DTI. Most lenders request documentation for any deposit over roughly $1,000 to $1,500 that doesn't trace back to your regular paycheck.

This is not the underwriter being suspicious. It is their job to verify that your funds are real, documented, and free of conditions that could affect your ability to repay the mortgage. The paper trail protects the lender and protects you.

How to Handle Deposit Questions Before They Slow You Down

The best approach is to document everything before it becomes a request. If you know you will receive money from a family member, get the gift letter set up in advance. If you sold a car or other asset, keep the receipt or a written record of the transaction.

Some borrowers react poorly to documentation requests. They read them as accusations. But underwriters apply the same standard to every file, regardless of who you are. Submitting a clear, brief explanation letter quickly moves you past the condition in one day. Waiting on it turns a one-day fix into a week-long delay. Speed matters here.

Employment and Income: What the Two-Year Rule Actually Means

How Lenders Read Your Work History

Lenders want to see a two-year history of consistent employment. That does not mean you need two years at the same company. Job changes within the same field are generally fine. A promotion with a raise is fine. What creates problems is a pattern that suggests income instability.

The changes that trigger extra scrutiny include moving from salaried to hourly, shifting from W-2 employment to self-employment, starting a new business during the process, or taking a job in a completely different industry. If you went self-employed in the last two years, lenders typically need two full years of tax returns showing self-employment income before they will count it for qualification. Borrowers in that situation have options, but they require a different approach. Our team works through these cases regularly, and more detail on what lenders accept for complex income situations is on our self-employed and complex income borrower page.

What Colorado and Florida Buyers Should Know

In Colorado's Front Range market, buyers often feel pressure to move fast on jobs as well as homes. We see this fairly often: a buyer goes under contract and then receives a higher-paying offer from another employer. The logic makes sense. But the new job can restart the income verification clock. If the new position has a probationary period or is in a different field, the underwriter may not use that income at all.

Florida buyers face a similar issue in markets like the Gulf Coast or Central Florida, where many borrowers shift from full-time employment to freelance or part-time work. The lender needs documented history, not income projections. If you are a Colorado borrower or a Florida buyer considering a job change during the process, talk to your loan officer before you accept anything. That conversation takes ten minutes and can prevent a closing disaster.

The Final Credit Pull Before Closing

The Check Most Buyers Don't Know Is Coming

Most buyers know lenders pull their credit at the start of the process. What many buyers don't know is that lenders also run a final credit review shortly before closing. Any new accounts, new balances, or new derogatory marks since the initial pull show up here.

This is where deals fall apart. A buyer opens a store credit card. A car payment posts to the report. A medical bill goes to collections. The underwriter sees all of it. If a new obligation pushes DTI too high, the loan gets suspended or denied, sometimes just days before closing. More than 70% of homebuyers apply with only one lender, per CFPB research. That means most buyers have no backup plan when an issue surfaces at this stage. Keeping your credit clean all the way through closing is not optional.

"The final credit pull before closing is the single biggest surprise I see with buyers who were never warned about it. They spent months being careful, and then opened a store card for 10% off a couch three weeks before closing. That one decision shows up on the pull and changes everything. It is the one I wish every loan officer explained upfront."

Reed Letson, Owner, Elevation Mortgage

What to Do If Something Changes During the Process

Sometimes things happen that are outside your control. A medical bill you forgot about goes to collections. A payroll error shows up on your credit report. If something changes, tell your loan officer immediately. Do not wait for the underwriter to find it first.

A letter of explanation submitted proactively reads very differently from one submitted after the underwriter flags the issue. One signals transparency. The other can look like you hoped it would go unnoticed. Underwriters prefer borrowers who get ahead of problems. Honesty moves files forward. Surprises slow them down or stop them entirely.

Common Underwriting Mistakes

Mistake 1: Buying a Car Between Pre-Approval and Closing

This is the most common way buyers lose their approval. The new monthly payment raises their DTI past the allowable threshold. Even a modest car payment of $300 to $400 per month can push a file out of range. Wait until after you have the keys.

Mistake 2: Depositing Cash Without a Paper Trail

Cash deposits with no documentation create a sourcing problem that underwriters cannot simply ignore. If you receive cash from a sale, a relative, or any other source, keep records of the transaction before the money hits your account. Retroactive documentation is harder to verify and takes longer to clear.

Mistake 3: Changing Jobs Right Before or During the Process

Borrowers assume a higher salary in a new job strengthens their application. But if the new job is in a different field, has a probationary period, or involves a pay structure change, the underwriter may not count it. Lenders look for stability, not just income level. If a job change is unavoidable, loop in your loan officer before you accept the offer so you know what it means for your file.

Maximum DTI by Loan Type

Your debt-to-income ratio is one of the first numbers underwriters check. Different loan programs have different thresholds, and exceeding the limit for your loan type is one of the most common reasons approvals get denied. Here is how the standard limits compare across loan types.

Keep in mind that "standard" limits can be exceeded with automated approval systems and strong compensating factors. But crossing these thresholds without a clear offset is where most DTI-related denials happen. For a deeper look at FHA loan requirements or other program options, our loan program pages break down each one in plain language.