COBRA coverage is designed to be retroactive, but in practice it often fails. Many people elect and pay for COBRA on time, only to see their coverage marked inactive, terminated, or reversed months later. These breakdowns are rarely caused by missed deadlines and more often stem from administrative errors, notice issues, or system mismatches between employers, administrators, and insurers. Understanding why this happens is the first step toward fixing it.

If your COBRA coverage suddenly shows as terminated, inactive, or not eligible—even after enrolling and paying—you’re not alone. In many cases, this isn’t a coverage decision at all, but an administrative failure between employers, COBRA administrators, and insurance carriers. Here’s why it happens and what it actually means.