After more than thirty years of underwriting, I can tell you that these little holiday spending choices show up in mortgage files like breadcrumbs. Buy Now Pay Later plans, short-term loans, zero-interest cards, promo-rate balance transfers, all of it adds up. And during the busiest shopping season of the year, borrowers accidentally make their mortgage path harder without realizing they’re doing anything risky at all.

You’ve probably heard that your credit score can make or break your mortgage application. But what does that number really mean — and what’s going on behind the scenes when a lender pulls your credit?

As a mortgage underwriter with over three decades of experience, I’ve seen the full spectrum of credit reports. Let me walk you through what matters most, what doesn’t, and how to put your best foot forward when applying for a mortgage.