What Can Kill Your Mortgage Approval? Common Mistakes Home Buyers Must Avoid
Buying a home is one of the most exciting milestones in life. After finding the perfect property and getting your offer accepted, it can feel like you're almost at the finish line. However, many buyers are surprised to learn that mortgage approval is not final until the loan has been fully underwritten and funded.
Every year, homebuyers lose financing because they make financial decisions that negatively impact their loan qualification. Understanding what can kill your mortgage approval can help you avoid costly mistakes and keep your home purchase on track.
Why Mortgage Approvals Can Fall Apart
When a lender pre-approves you for a mortgage, they are evaluating your current financial situation. However, lenders continue to verify your employment, income, debts, and creditworthiness throughout the loan process.
If anything changes significantly before closing, the lender may deny the loan or require additional conditions before approving it.
1. Changing Jobs Before Closing
One of the biggest mistakes buyers make is changing employers during the mortgage process.
Lenders verify employment multiple times before closing. If you switch jobs, especially from a salaried position to commission-based income or self-employment, the lender may need to reevaluate your loan application.
What to Do Instead:
Stay with your current employer until after closing whenever possible.
Discuss any planned job changes with your lender before making a move.
Avoid switching from W-2 employment to self-employment during the loan process.
2. Making Large Purchases on Credit
Buying a new car, furniture, appliances, or electronics before closing can significantly impact your mortgage approval.
When you finance large purchases, your debt-to-income ratio increases, which may push you beyond the lender's qualification limits.
Common Purchases That Cause Problems:
New vehicles
Furniture financing
Large appliance purchases
Recreational vehicles
Boats and motorcycles
What to Do Instead:
Wait until after closing to make major purchases that require financing.
3. Opening New Credit Accounts
Every time you apply for new credit, the lender may perform a hard inquiry on your credit report.
Multiple inquiries and new accounts can:
Lower your credit score
Increase your monthly obligations
Raise concerns during underwriting
What to Do Instead:
Avoid opening:
Credit cards
Personal loans
Store financing accounts
Buy-now-pay-later programs
Until your home purchase is complete.
4. Missing Payments or Damaging Your Credit
Even one late payment can negatively affect your credit score.
Mortgage lenders often perform a final credit check shortly before closing. If they discover:
Late credit card payments
Missed auto loan payments
Collection accounts
Significant score drops
Your loan approval could be delayed or denied.
What to Do Instead:
Continue paying all bills on time.
Set up automatic payments if needed.
Monitor your credit throughout the process.
5. Depositing Large Unexplained Amounts of Money
Mortgage lenders must verify the source of funds used for your down payment and closing costs.
Large deposits without proper documentation can create underwriting issues.
Examples Include:
Cash deposits
Transfers from unknown accounts
Gifts without documentation
Cryptocurrency liquidation proceeds
What to Do Instead:
Keep detailed records and consult your lender before moving large sums of money.
6. Draining Your Savings Account
Lenders want to see that you have sufficient funds available for:
Down payment
Closing costs
Reserves after closing
Spending a large portion of your savings before closing can raise red flags.
What to Do Instead:
Maintain stable account balances until your loan has funded.
7. Co-Signing for Someone Else's Loan
Many buyers try to help family members by co-signing a car loan or personal loan during the mortgage process.
Unfortunately, lenders typically count that debt against you, even if someone else makes the payments.
What to Do Instead:
Wait until after your home purchase is complete before considering a co-signing arrangement.
8. Failing to Disclose Financial Information
Honesty is critical when applying for a mortgage.
Lenders verify:
Employment
Income
Assets
Debts
Tax records
Failing to disclose information can result in immediate loan denial.
What to Do Instead:
Provide complete and accurate information from the beginning of the application process.
9. Letting Employment Verification Fail
Many lenders perform a final employment verification shortly before closing.
If your employer cannot verify your employment because:
You've resigned
You're on unpaid leave
Your status has changed
Your loan approval may be delayed or canceled.
What to Do Instead:
Maintain stable employment and notify your lender of any changes immediately.
10. Ignoring Requests from Your Lender
Underwriters often request additional documentation throughout the loan process.
Delays in providing:
Bank statements
Pay stubs
Tax returns
Explanations of deposits
Can delay closing or jeopardize approval.
What to Do Instead:
Respond quickly to all lender requests and keep communication open.
The Golden Rule During Mortgage Approval
A simple rule can help protect your mortgage approval:
Don't Change Anything Financially Until After Closing
Avoid:
New debt
New credit cards
Job changes
Large purchases
Major bank account transfers
The fewer changes you make, the smoother your transaction will be.
Final Thoughts
Getting pre-approved is an important first step, but it's not the final step. Mortgage lenders continue evaluating your financial situation until the day your loan funds.
If you're buying a home in Central Texas, understanding these common mortgage approval killers can help you avoid unnecessary stress and keep your transaction moving toward a successful closing.
Working with an experienced real estate professional and trusted lender can help you navigate the process and avoid mistakes that could derail your dream of homeownership.
Thinking About Buying a Home in Hays County, Kyle, Buda, San Marcos, or the Greater Central Texas Area?
Allen Deaver with Asset Realty has been helping buyers navigate the home-buying process for more than 20 years. Whether you're a first-time buyer, relocating to Central Texas, or using a VA loan, Allen can connect you with trusted local lenders and guide you every step of the way.
Contact Allen Deaver today for expert advice on buying a home in Central Texas.

