Best Buy's "featured offer" seems like a no-brainer for buying brand-new electronics — two years with no interest comes across as a great way to buy it now and pay later without punishing interest charges. If you're not turned off by the notion of being accountable for yet another credit card [1], then here's something else to consider that might make you think twice about financing your new TV with a store's zero-interest proprietary card.

You know that a credit inquiry can temporarily shave points from your score [2], but the low credit limit on these store cards may have a more negative impact. Your credit-to-debt ratio makes up a large part of your overall credit score, and The Wall Street Journal emphasizes [3] that "credit bureaus look at how much of all your available credit is borrowed as well how much you've used on each card." The article uses the example of purchasing a $2,000 TV on a card with a $2,500 limit; that's utilizing 80 percent of available credit, which doesn't do any favors for a consumer's credit score.

Source [4]