KEY POINTS
  • These common moves can cause your credit score to drop.
  • They include closing a line of credit, paying an old debt and failing to regularly check your credit report.

Ted Rossman, an industry analyst at CreditCards.com, recently booked a trip to Walt Disney World with his wife, Chelsea and 3-year-old daughter, Ashleigh.

He charged the $3,000 vacation on a new credit card. Shortly after, he was shocked to find his credit score had dropped to 790 from 831. "Still good, but a far cry from 831," Rossman said. (Scores from FICO, the data analytics firm that develops and sells credit scores, range from 300 to 850 — and the higher, the better.)