That means the late payment wouldnât be reported to Experian unless you still hadnât paid the bill when the next monthâs billing statement was sent. For that reason, sending the check a day late probably wonât have any affect on your credit report. Because you didnât miss a full month, the late payment is unlikely to be reported. Of course, you may be charged a late fee and there is a chance that your interest rate on that account may go up.