Missed or delinquent payments are the fast-track to a lousy credit score.
Since payment history makes up 35% of your credit score, failing to make the minimum payment within 30 days of the due date is a big red flag for banks or lenders. Each time it's considered a "hard inquiry" on your credit score.
Example: if you have never missed a payment and your credit score is in the 700’s, missing one 30-day grace period can drop your FICO score as much as 100 points. And making up the 100 points will take a lot longer (possibly years).