Vedanth Bhartee
Writer · Reviewed by Richard ChanUpdated Jun 12, 2026
1 min read
Your Initial Enrollment Period (IEP) for Medicare lasts for seven months, beginning three months before your 65th birthday month.
Missing your IEP can result in permanent late enrollment penalties for Medicare Part B and Part D.
You can delay Part B without penalty if you are still working and have creditable health coverage through an employer.
It’s a hard truth to swallow: when navigating the complexities of Medicare, time is decidedly not on your side. The invisible timer begins ticking the moment you enter your Initial Enrollment Period (IEP). In this narrow window, you face the immense pressure of mastering a labyrinth of coverage details before firmly committing to a plan. Fumbling this deadline doesn't just mean a temporary hiccup; missing your IEP can saddle you with crippling, lifelong financial penalties permanently baked into your monthly premiums. Because the plan you select will lock in your healthcare trajectory for an entire year, finding the right fit is a high-stakes decision—one that absolutely demands careful, unhurried strategy rather than a last-minute scramble.