KEY POINTS
  • You may be looking to make a big-ticket purchase or just shave some money off your total bill this holiday season.
  • Buyer beware: If you take retailers up on common deferred-interest deals, you could end up paying more than you bargained for.
  • If you do decide to sign up, read the fine print and have an aggressive plan to pay the balance off. Better yet, choose to go with a traditional credit card.
Holiday shoppers at the Time Warner Center in New York.

You've likely heard the pitch, "Would you like to apply for a store card?" as you're making purchases.

Many times, you should just say no to that offer, new research shows.