As long as you make the payment fewer than 30 days after the due date, you won't get a "30 day late" mark on your credit report.
As far as how that specific creditor will react to the late payment, they may or may not ding you for higher interest or lower credit limit, but in my experience they usually won't as long as it doesn't become a habit. However, it might affect that bank's likelihood to issue future CLI's or new credit cards. But it won't have any bearing on CLI's or new account with other banks.
The big-4 CRAs developed and use as reporting policy a common credit reporting manual titled the Credit Reporting Resource Guide.
That manual clearly sets the standard policy used by the big-4 CRAs that lates are not reportable as 30-late until the period of delinquency has reached at least 30 days from the billing due date.
Creditors are well aware of that policy, and dont report a late payment until it has reached 30 days after the billing due date.
If you do have a situation where a late payment is reported to a CRA that was brought back into good standing within 29 days after the billing due date, then simply file a dispute with the CRA, and include the billing statement showing the billing due date, and proof of when you paid.
30 days late = payment made 30 days after the due date.
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