What is a timely premium payment for a month of COBRA coverage?
If the premium is not paid by the monthly due date, the qualified beneficiary has in general a period of 30 days grace in which to make the premium payment. If the qualified beneficiary hand delivers the premium, it must be in your hands prior to the end of the grace period. If the premium is mailed, the envelope must be postmarked by the end of the grace period. You might not receive it within the 30 days, but if it is postmarked within the 30 days, it is still considered a valid and timely premium payment.