Dear Liz: I have a few credit cards with very high interest rates — in the mid-teens. My FICO has improved (805 to 830) and I carry little or no balance on the credit cards. I have contacted the issuers asking for lower interest rates but they won’t budge. I have other credit cards with single-digit interest rates. I would like to close the credit cards with the higher interest rates and understand that I may see a drop in my FICO score. How long will take to get my credit score back in the 800s? Is this a wise move?

Answer: Sites that offer credit scores often also have simulators that estimate what might happen if you take certain actions, such as closing cards. You’ll note, though, that these simulators come with plenty of caveats that add up to: Your mileage may vary. A lot.

The reality is that it’s often tough to predict exactly how account closures will affect your scores or precisely how long those scores will take to recover. That doesn’t mean you can never close a card. For example, if you’re not using the card and you’re tired of paying an annual fee, then closing it can make sense if your scores are good and you’re not going to be in the market for a major loan, such as a mortgage. (You don’t want to close or open other accounts while you’re in the process of getting a loan.) If your scores drop a bit, it won’t be a crisis.

Closing a bunch of accounts at once, however, is generally not a good idea — particularly if you’re just doing it to “show them who’s boss.” If you’re not paying interest on these cards, their rates are irrelevant.