A pre-approval letter feels like a finish line. The buyer hits "submit" on a stack of documents, the lender comes back with a number — usually a six- or seven-figure one in San Diego — and a letter that says "you're pre-approved." From that moment forward, most buyers act as if the financing is settled. It isn't. Approximately 12% of mortgage applications that reach the pre-approval stage are eventually denied, and the denial often comes after an offer is accepted, weeks into escrow, with the buyer's earnest money on the line.
Here's what a pre-approval actually is, what it isn't, and the four things that most often cause "pre-approved" buyers to lose their financing in escrow.
The three levels of "approved"
Before getting into the trap, a quick clarification — because lenders use these terms loosely:
| Stage | What's actually verified | How binding |
|---|---|---|
| Pre-qualification | Self-reported income, assets, debts | Not binding; conversation only |
| Pre-approval | Documented income, credit pull, asset review | Conditional; subject to property and underwriting |
| Underwritten / fully approved | Full underwriter review, all conditions cleared | Strong; only property-specific items remain |
The vast majority of "pre-approval" letters in San Diego are at the second tier — credit pulled, income documented, debt-to-income calculated against the loan amount. That's a real check. It's not the same as your loan being underwritten. The underwriter — the person who actually decides whether the loan funds — typically doesn't review the file until after an offer is accepted.
What can derail a "pre-approved" loan
1. Job changes after pre-approval
Lenders verify employment at pre-approval and again immediately before closing. A job change between those two points — even a promotion at the same company, even a move to a higher-paying role at a new employer — can require requalification. The standard underwriting rule is that a borrower needs two years of employment in the same line of work, with continuity through the pre-closing verification. Switching from a salaried role to commission-based, or from W-2 to 1099, mid-escrow, has killed thousands of otherwise-clean loans.
2. New debt or credit pulls
Buyers consistently underestimate this one. Buying a car, opening a store credit card, financing furniture — anything that pulls credit or adds monthly payment obligations between pre-approval and closing — can push the buyer's debt-to-income ratio over the lender's threshold. Conventional loans typically max DTI at 45% (with Fannie Mae's automated underwriter sometimes allowing up to 50%);1 FHA loans up to 56.9% with compensating factors.2 A new $600/month car payment on a borderline DTI buyer is enough to fail.
3. Appraisal coming in low
The lender will not lend more than a percentage of the appraised value, regardless of the contract price. If a $950,000 home appraises at $920,000, the buyer needs to either bring an additional $30,000 of cash to closing, renegotiate the price, or walk away. Pre-approval doesn't protect against this — the appraisal happens after offer acceptance. Roughly 8% of California home appraisals come in below the contract price.3
4. Property-specific underwriting issues
Some properties don't meet conventional or FHA loan standards. Condos can be denied if the HOA's reserves are too thin, if the master insurance has gaps, if too many units are investor-owned, or if the condo isn't on Fannie Mae's approved list. Single-family homes can be denied for unpermitted additions, septic system issues that surface during inspection, or hazard zones that trigger insurance requirements the buyer can't meet. None of these issues touch the buyer's pre-approval at all — they're property-specific — but they can still kill the financing.
One to three days before closing, your lender will call your employer to verify you're still employed. If you've quit, been laid off, or are on unpaid leave, the loan can be paused or denied at that stage — even if the loan was otherwise cleared to close. This is true for both employees and self-employed borrowers (the latter typically requires a CPA letter or recent business tax filings within days of closing).
How to keep your "approved" loan actually approved
Five rules to follow between pre-approval and closing:
- Don't change jobs unless absolutely necessary. If you must, talk to your lender first. Some changes are fine; others kill the loan.
- Don't open new credit accounts or finance large purchases. No new cars, no new credit cards, no store financing for furniture or appliances. Wait until after closing.
- Don't make large unexplained deposits. Lenders track all funds and require documentation for any deposits above ~$1,000 that aren't payroll. A "gift" from family without proper paperwork can fail underwriting.
- Stay current on every existing payment. One late payment between pre-approval and closing — even a $25 credit card minimum — can tank your credit score by 30+ points and require requalification.
- Respond to lender requests within 24 hours. Underwriting requests during escrow are time-sensitive. A delay of even three or four days can push the closing past the loan contingency date and put your earnest money at risk.
The "pre-approval letter" sellers actually trust
In competitive San Diego submarkets, the difference between a pre-approval letter and an underwritten approval is increasingly visible to listing agents. A truly underwritten pre-approval — sometimes called "TBD approval" or "conditional approval" — is significantly more credible than a standard pre-approval letter, and listing agents will rank offers accordingly.
Three indicators that your pre-approval is the strong kind:
- The lender ran your file through automated underwriting (DU or LP) — the actual decision engine Fannie Mae and Freddie Mac use — and the file came back "Approve/Eligible."
- The lender pulled and reviewed two years of W-2s and tax returns, plus two months of bank statements, before issuing the letter.
- The pre-approval letter specifies the loan amount and includes language about "subject to property and final underwriting." Generic letters that just say "qualified for up to $X" without specifying loan type, term, or rate are weaker.
What to do if your loan is denied after offer acceptance
If the financing falls apart in escrow, the loan contingency is your protection. The standard California Residential Purchase Agreement provides a 21-day loan contingency window — during which the buyer can cancel the contract and recover the earnest money deposit if financing isn't secured.4 Three things have to happen for that protection to work:
- The denial has to occur within the contingency window. If you've already removed the loan contingency in writing, the protection no longer applies and the deposit is at risk.
- You have to act in good faith. The contract requires reasonable cooperation with the lender. A denial because you didn't submit requested documents or missed lender deadlines isn't grounds for a refund.
- The cancellation has to be properly noticed. California Association of REALTORS' "Cancellation of Contract" form (CC) is the standard mechanism, and both parties have to sign for the deposit to be released by escrow. More on earnest money mechanics here.
Run a full San Diego payment scenario before you commit.
Open the calculator →The honest read
A pre-approval letter is the start of your financing journey, not the end. Treat it as a green light to start writing offers, not as a guarantee that the loan will fund. Five out of every six pre-approved buyers do close successfully — but the one who doesn't is usually the one who treated pre-approval as final approval and didn't manage the file carefully through escrow. Stay employed, stay out of new debt, respond to lender requests fast, and don't remove your loan contingency until you have a "clear to close" in writing.
Loan approval rules vary by lender, loan type, and individual file. Always verify specifics with your loan officer. Educational content only — not legal, tax, or financial advice.
References
- Fannie Mae. (n.d.). Selling Guide B3-6-02: Debt-to-income ratios. Retrieved April 28, 2026, from https://selling-guide.fanniemae.com/sel/b3-6-02/debt-income-ratios
- U.S. Department of Housing and Urban Development. (n.d.). Single Family Housing Policy Handbook 4000.1. Retrieved April 28, 2026, from https://www.hud.gov/program_offices/housing/sfh/handbook_4000-1
- Greiner Law Corp. (2025). Appraisal contingency California: 2025 master guide. Retrieved April 28, 2026, from https://greinerlawcorp.com/appraisal-contingency-california/
- California Association of REALTORS. (2024). Residential Purchase Agreement (RPA-CA), Paragraph 3. Retrieved April 28, 2026, from https://www.car.org/