There are a few fundamental rules to the success of anyone involved in points and miles. If there’s one that is more important than any other, it is the Chase 5/24 rule.

The Chase 5/24 rule is so fundamental that you’ll almost always hear someone mention it when discussing sign up strategies. “What’s your 5/24 status?” is almost always the first question asked when someone asks for credit card recommendations.

If you haven’t heard of the 5/24 rule yet, you may be wondering what the big deal is.

Opening five credit cards within 24 months will render you ineligible for any further Chase credit cards, until that five number has dropped to, at the most, four credit cards within the last 24 months. While not published by the bank, the Chase 5/24 rule is widely accepted as truth by the miles and points community after years of shared and collected experiences.

Business credit cards do not, anecdotally, count in your Chase 5/24 total.

In January of 2018, I began a credit card fast that lasted for nine months. In other words, I stopped applying for new credit cards. At that point I had been cutoff from Chase credit cards for a long time, years, and was tired of it. I had opened a number of new credit cards, more than five in the prior two 24 months, which is where the Chase 5/24 rule gets its name from.