You got the pre-approval letter. You're excited. You can finally go house hunting, and you did. You found the perfect home in Daly City, made an offer, got it accepted, and now you're in escrow. Everything is moving smoothly, and you're thinking about finally treating yourself to that new car you've had your eye on.
Hold that thought.
I know it's tempting. After all, you've made it this far in the homebuying process. But here's what a lot of buyers don't realize: the "pre" in preapproval is short for preliminary, as the lender still has to validate all of your information to issue a final approval before you close. You're not completely approved yet, even if getting the pre-approval letter felt like the hardest part of the process.
Understanding What Pre-Approval Really Means
I see this happen more often than you'd think, and I want to make sure you understand what's actually happening behind the scenes. Your credit will be pulled again before closing to make sure your financial situation hasn't changed. In fact, the last credit check before closing typically happens within 1 to 3 days of your closing date. That's incredibly important because a lot can change in the weeks or months between when you got pre-approved and when you're about to close.
Think of pre-approval as a conditional approval. The lender is saying, "Based on what you've told us and what we've verified, we're willing to lend you this amount of money, assuming nothing changes." But if something does change, that approval can vanish.
How a Car Loan Can Derail Your Mortgage
Let's talk specifically about buying a car because it's one of the most common financial moves people want to make after getting pre-approved. Any new loans, credit cards, or large purchases could put your mortgage approval at risk even if you've already been pre-approved.
When you apply for a car loan, a few things happen immediately. First, once you apply for new credit for a car, no matter how small, red flags or red lights start flashing for the home lender. Second, lenders re-check credit before closing, and new debt can derail the deal. Third, and this is the big one for your finances: taking on a car loan before purchasing a home may raise your debt-to-income ratio (DTI), which could affect your ability to qualify for a mortgage.
Let me explain that last part because it's crucial. Your debt-to-income ratio is the total amount you owe each month compared to how much you make. Most lenders want to see a DTI of no more than 36%, meaning that your total monthly debt payments are no more than 36% of your monthly income. If you were approved with a DTI of, say, 35%, and then you add a $500 car payment to your monthly debts, you've just pushed yourself over that 36% threshold. Once you've received full mortgage approval, taking out a new car loan can jeopardize your home purchase. If your DTI increases, your lender might have to restructure the details of your financing which can impact the loan amount and interest rate you were originally approved for. In worst case scenarios, it may even cause the lender to retract your loan approval if you no longer meet qualification guideline requirements.
It's Not Just About Credit Scores
Most people think the issue is only about their credit score dropping, but that's actually just part of the problem. What drops scores between pre-approval and closing includes one missed payment (60-110 point drop), a new hard inquiry from any credit application, a new collection appearing on the report, or a credit card balance spiking above 30% utilization. Even a 10-20 point drop in credit score before closing can change your mortgage rate or trigger a denial if your score was near a qualifying threshold.
But beyond your credit score, there's another problem that often gets overlooked: your available cash. Even if you use your own cash to make big purchases, you'll end up having less cash on hand for reserve requirements, which could also negatively impact your loan. Lenders want to see that you have cash reserves, money left over after your down payment and closing costs. That reserve shows the lender you can handle unexpected expenses and proves you're financially stable. If you drain your savings account to buy a car, you might not have enough reserves left to satisfy your lender's requirements.
Employment Verification Happens Before Closing Too
Here's something else that surprises people: lenders aren't just checking your credit before you close. Lenders verify employment before closing. A change such as switching jobs or reduced income can require additional review or impact approval. This is part of that final verification process that happens in those last few days before closing.
The bottom line is that lenders are looking at your entire financial picture before they hand over the keys, and they're looking at it with fresh eyes during the underwriting and final verification stage.
What You Should Do Instead
If you absolutely need a car, if you can pay cash for the car and still keep your home savings intact, the impact on your mortgage eligibility is much smaller. That's the only scenario where buying a car makes sense during the home buying process. Otherwise, don't finance a new car in the middle of your mortgage application. If you must, wait until after your home closes.
I can't stress this enough: if something in your financial picture changes, call your loan officer before you act, not after. If something changes, telling your loan officer early gives the mortgage team more time to evaluate the impact, collect any necessary documentation, and address the issue before closing. Don't make any major financial decisions without talking to your lender first.
The Wait Is Worth It
I know waiting feels hard when you're in the homebuying process. But think about it this way: you're potentially putting $500,000 or more at risk over a $500 monthly car payment. In the greater Daly City real estate market, I see buyers make this mistake, and it's heartbreaking. You've already found your home, already made the offer, already started the process. Don't let a car purchase stop you from closing.
Once that closing happens and you have the keys in your hand, buy whatever car you want. After that, you are free to do what you want. But until then, focus on keeping your finances stable and your approval solid.
If you're in the middle of the homebuying process and you're feeling confused about what you can or can't do, I'm here to help. As a real estate agent serving Daly City, I work with lenders and buyers every single day, and I've seen what works and what doesn't. Give me a call if you have questions about protecting your mortgage approval. That's what I'm here for.
And when you're ready to start searching for your new home, you can search properties on HOUSEJET, which gives you access to all the listings in the Daly City area and beyond. It's a great way to get started on your homebuying journey, and when you're ready to take the next step, reach out to me. I'd love to help you find your perfect home.
