Bank of America has a hidden rule that could impact your credit card application strategy: the 2/3/4 rule. It's not as well-known as Chase's 5/24 rule, but it's still super important to be aware of if you're planning on adding a BofA card to your wallet. Essentially, this rule limits how many new Bank of America cards you can get approved for within specific timeframes. You can only be approved for: two cards in a rolling 2-month period, three cards in a rolling 12-month period, and four cards in a rolling 24-month period. Why should you care? Well, if you're trying to maximize your rewards earning by strategically opening credit cards, this rule could throw a wrench in your plans. For example, if you recently snagged a couple of sweet Bank of America cards, you might need to pump the brakes on applying for another one, even if it has a killer sign-up bonus you're eyeing. Knowing this rule will help you plan your applications and increase your chances of getting approved for the cards you really want!