Will a permanent magnet erase data on my credit cards?

do I need to keep permanent magnets away from any credit or debit cards?

You need a REALLY strong magnetic field to wipe out a credit card. A large neodymium magnet might do it.

Basically, I wouldn’t worry about it much.

I think the mythbusters did a segment about this, testing to see which size magnets could erase the magnetic strip on a card, and only the biggest baddest magnet could do it.