Recently, I heard a story about someone who was shocked when looking at their Medicare statement. After quitting their job and relying on COBRA, they applied for Part B late and found that penalties were added to their monthly premiums.

What was even more surprising was that these penalties don't just last for a year or two. They continue to accumulate as long as you have Part B.

So today, I'll carefully outline the enrollment periods and penalty structures for Part B that everyone approaching 65, as well as those managing their parents' schedules, should know.

First, let's look at the basic numbers. The standard Medicare Part B premium for 2026 is $202.90 per month.

If you enroll late, for every full 12-month period you could have enrolled but didn't, an additional 10% is added to the standard premium. This extra charge follows you for life as long as you have Part B.

Doing the math makes it real. If you're one year late, you'll pay an extra $20.29, bringing your total to $223.19. If you're two years late, that's an additional $40.58, totaling $243.48.

If you delay for seven years, you'll see a 70% increase, raising your monthly premium to $344.93. That's over $140 more each month, and when you think about paying that for decades, it's honestly a bit frightening.

Moreover, the penalties are recalculated based on the standard premium for that year. If premiums increase, so do the penalty amounts, which can lead to a growing burden over time.

So when should you enroll? The initial enrollment period is centered around the month of your 65th birthday, extending three months before and three months after, for a total of seven months.

For example, if your birthday is in June, your initial enrollment period is from March to September. As long as you apply within this window, you won't have to worry about penalties.

If you are already receiving Social Security benefits before turning 65, you are typically enrolled automatically. Conversely, if you haven't started receiving benefits yet, you'll need to apply yourself, so be sure to check this.

For those who continue to work, the situation can be a bit different. If you have group health insurance through your own or your spouse's current job, you may be able to delay enrolling in Part B.

In such cases, once you retire or your job-based insurance ends, you can apply during a special enrollment period within eight months. As long as you apply during this time, you won't incur penalties.

However, many people overlook a crucial detail: COBRA and retiree insurance are not considered current job-based insurance.

This means if you're relying on COBRA after leaving your job and miss the eight-month window, you'll lose your special enrollment period. This was exactly the case for the acquaintance I mentioned earlier.

Marketplace individual insurance, like Obamacare, also doesn't count as job-based insurance, so similar issues can arise. Just because it's called health insurance doesn't mean it's treated the same way.

Companies with fewer employees also need to be cautious. If a company has fewer than 20 employees, Medicare typically pays first, and the company insurance pays second.

In this case, if you don't have Part B, the company insurance may not cover what Part B would have paid. If you work for a small company, be sure to ask your HR department or insurance provider how your plan interacts with Medicare.

If you've already missed your enrollment period, you'll need to take advantage of the general enrollment period, which runs from January 1 to March 31 each year.

In the past, applying during this time meant coverage wouldn't start until July 1, but starting in 2023, the rules changed, and coverage begins on the first of the month following your application. However, in this case, penalties will still apply for the late period.

As I organized this information, I realized that this system is not as forgiving as one might think. A single mistake can lead to lifelong costs, and I wish there was a more user-friendly way to guide people through it.

Still, if you know in advance, you can definitely avoid these penalties. If I were managing this myself, I would mark my calendar three months before my 65th birthday.

And if I planned to delay enrollment due to job-based insurance, I would also note the eight-month deadline based on my retirement date. I wouldn't forget to get a confirmation letter from my employer regarding my insurance enrollment period for future reference.

You can apply through the Social Security website or office. If you find English challenging, it's a good idea to get help from family or local Korean organizations to check everything together in advance.

As a side note, the Part B premium for 2027 has not yet been announced, so the amounts I've outlined today are based on 2026 figures. When the new amounts are released, the penalty calculations will change accordingly.

Rules may vary based on individual circumstances, so be sure to check with SSA or official Medicare resources, or utilize free counseling services like HICAP. If you have medications or treatment plans, consult with your doctor or pharmacist to determine coverage options.

In summary, remembering to not miss the first seven months, that COBRA is not considered job-based insurance, and adhering to the eight-month deadline after retirement can help you avoid most penalties.

Do you know anyone who has struggled with the timing of Part B? If you have experiences or questions, feel free to share in the comments, and we can look into it together.