May 20, 2026
Underwriting is the deep dive. After you go under contract on a property, your lender orders a full review of your financial picture alongside a thorough evaluation of the property itself. The underwriter, the person actually making the approval decision, verifies income, re-pulls your credit, scrutinizes your bank statements, and assesses whether the home you're buying meets the loan program's requirements.
As Rocket Mortgage notes, pre-approval and pre-qualification are both estimates of what you can borrow. The underwriting stage is where lenders do the real work. And because it happens weeks after your initial pre-approval, a lot can change in the meantime.
Employment changes are the single most common reason pre-approved buyers lose their financing. Movement Mortgage identifies a substantial change in employment as the top reason mortgages get denied after pre-approval. Most loan programs require at least two years of employment history in the same field, and lenders almost always perform a final Verification of Employment within days of closing, sometimes the very morning of your closing date.
Switching jobs, going from a salaried role to self-employment, or taking a gap between positions can all trigger a denial, even if your new income is higher than before. If you're thinking about a career move, it's worth having a direct conversation with your lender before making any changes.
This is one of the most avoidable pitfalls, and one of the most common. Buying furniture on a store credit card, financing a car, or even applying for a new rewards card between pre-approval and closing can shift your debt-to-income ratio enough to disqualify you. Lenders re-pull your credit before closing, and new accounts or balances that weren't there during pre-approval can change the math entirely.
As Loan Pronto puts it, "a drop in credit score, new debt, or job changes are common red flags that trigger mortgage denial." The rule of thumb is simple: don't open new credit, make large purchases, or move significant amounts of money without talking to your lender first.
Even if your finances are in perfect order, the property itself can derail your loan. Lenders cannot lend more than the appraised value of the home, full stop. If the appraisal comes in below the agreed purchase price, you have three options: pay the difference out of pocket, renegotiate the price with the seller, or walk away if you have a mortgage contingency in place. If none of those options work, the loan gets denied.
In competitive markets where buyers sometimes offer above asking price, this is a very real risk. It's worth discussing with your broker before making an offer.
The home you're buying has to meet your lender's standards, not just your own. For government-backed loans like FHA or VA, the standards are especially strict. As one mortgage resource notes, structural issues, health and safety concerns, or being in a condo building that isn't approved for FHA financing can all result in a denial that has nothing to do with your creditworthiness.
Even for conventional loans, issues like title problems, unpaid liens, a missing certificate of occupancy, or a building with too few owner-occupants can stop a loan in its tracks. Brick Underground highlights that for condo and co-op buyers specifically, a building's reserve fund, ownership composition, and legal status can all factor into whether a lender will approve the loan. This is especially relevant in New York City.
Large, unexplained deposits or withdrawals in your bank statements can raise underwriting red flags. Lenders need to verify the source of your funds, and irregular activity can require extensive documentation to clear. Similarly, if your credit score drops between pre-approval and closing, even by a modest amount, it can affect your interest rate or, in borderline cases, your eligibility altogether.
The good news is that most of these pitfalls are preventable. Here are the principles worth keeping in mind from the moment you're pre-approved until the day you close.
Disclaimer: This content is intended for informational and educational purposes only and is not intended to be construed as legal, tax, financial, or insurance advice. Every property and tax situation is unique. Please consult a licensed attorney, CPA, or tax professional regarding your specific circumstances before making any decisions related to property improvements, tax assessments, or real estate transactions. Mohammed M. Rahman is a licensed real estate broker in New York. Contact: Mo@ClosedByMo.com.
