Working past 65 gives you options on when to take Medicare. Here is how to decide and avoid costly mistakes.
Do I have to enroll in Medicare at 65 if I'm working?
Not necessarily. If you work for an employer with 20 or more employees and have active group coverage, you can usually delay Part B without penalty and enroll later when you retire, using a Special Enrollment Period. Most people still sign up for Part A, since it is premium-free for those with enough work credits, unless they want to keep contributing to an HSA. If your employer has fewer than 20 employees, Medicare typically becomes primary, so you generally should enroll at 65. The right move depends on your employer and coverage. Call 1-800-MEDIGAP for free, tailored guidance.
Your Special Enrollment Period when you retire
When your active employment or group coverage ends, you get a Special Enrollment Period to sign up for Part B without a late penalty. This window generally lasts 8 months from the end of employment or coverage, whichever comes first. Acting within it keeps you penalty-free and helps avoid a coverage gap. Note that COBRA and retiree coverage do not extend this window, a common and expensive mistake. Timing your enrollment to align with your last day of work and your group plan is essential. 1-800-MEDIGAP can map your exact deadlines so you do not miss them, at no cost.
HSA contributions and Part A timing
If you contribute to a Health Savings Account, working past 65 adds a wrinkle. Enrolling in any part of Medicare, including premium-free Part A, ends your ability to contribute to an HSA. Worse, if you delay Medicare past 65 and later enroll, Part A can be back-dated up to six months, which may create excess HSA contributions and tax penalties. To keep contributing, you generally must delay all of Medicare, including Part A, and stop contributions before any back-dated coverage begins. These rules are easy to get wrong. Call 1-800-MEDIGAP for free help coordinating your HSA and Medicare timing.