Let me open the file on the Medicare mistake I see smart, careful people make every single year — almost always by accident.
Here is what nobody tells you clearly: Medicare enrollment is not "whenever you get around to it." It runs on a 7-month clock. Your Initial Enrollment Period opens three months before the month you turn 65, includes your birthday month, and closes three months after. That is the window. Miss it — without qualifying employer coverage — and a penalty attaches to you permanently.
And this is not a slap on the wrist. The Part B late enrollment penalty adds 10% to your monthly premium for every full 12-month period you could have enrolled and did not. With the 2026 Part B premium at $202.90 a month, waiting two years means roughly a 20% penalty — about $40.58 extra, every month, for as long as you have Medicare. Wait longer and it climbs higher. It never resets. There is a separate, also-permanent penalty on Part D drug coverage.
Why good people miss it
Nobody mails you a countdown. If you are still working at 65 with solid employer coverage, you may be perfectly fine to delay — but the moment that coverage ends, a new clock starts: you generally have 8 months (your Special Enrollment Period) to sign up before the penalty logic kicks in. People retire, lose the coverage, assume they will "deal with Medicare later," and quietly blow past the deadline. By the time they notice, the penalty is already permanent.
This is not a one-time fee you can pay and forget. It is a percentage bolted onto your premium for the rest of your life. Someone who overpays $40 a month from 67 to 87 hands the government nearly $10,000 — for a form they could have filed on time and free.
The honest part
I am not going to tell you to rush into Medicare the day you turn 65. For some people — those with real employer coverage — that would be the wrong move. What I am telling you is that the rules are unforgiving and permanent, and the single most expensive thing you can do is guess. You want to know your exact window, and whether your current coverage counts, before the clock runs out, not after.
Most of the penalty cases I see did not come from carelessness. They came from a reasonable assumption — "I'm covered through work, I'll sort Medicare out eventually" — that happened to be wrong about the timing. Fifteen minutes mapping your actual dates is the cheapest insurance there is against a lifetime surcharge. I do that for people in Rhode Island for free, whether or not they ever buy a thing from me.
Questions Rhode Islanders ask me
When exactly is my window?
Seven months: the three months before your 65th-birthday month, the birthday month itself, and the three months after. Enrolling in the first three months means coverage can start the month you turn 65.
What if I keep working past 65?
If you have qualifying coverage through a current employer (yours or your spouse's), you can usually delay Part B without penalty and enroll later during a Special Enrollment Period, generally within 8 months of that coverage ending. The key word is current employer coverage - retiree plans and COBRA do not always count.
Is the penalty really permanent?
Yes. The Part B late-enrollment penalty lasts for as long as you have Part B. That is exactly why the deadline matters so much.
Find your exact deadline before it costs you.
One short call and I will map your enrollment window, tell you whether your current coverage counts, and make sure you never trip a lifetime penalty.
Call Omar: 401-287-2737Life Catlin Insurance is an independent brokerage. This is general education, not individualized Medicare advice; your dates and options depend on your situation. Omar Catlin, Licensed Insurance Broker, North Providence, RI.