The $600/month Medicare mistake too many 65-year-old retirees make. Don’t fall for the same trap

This oversight could cost you hundreds of dollars extra every single month. Here’s what you need to know about how these hidden traps emerge and how best to avoid them.

Medicare’s hidden trap

The Medicare system is complex and byzantine. To make matters worse, there’s also a list of different penalties that apply if you didn’t understand the system and make a bureaucratic mistake.

For instance, if you enroll in the program late, you may face an additional surcharge every month. These penalties can range from 1% to 10% of your monthly premiums under Part A, B or D, according to the National Council on Aging.

However, the biggest mistake most seniors make is with IRMAA or the Income-Related Monthly Adjustment Amount. This is a surcharge the federal government layers on top of your standard Medicare Part B and Part D premiums if your income exceeds certain thresholds.

What makes this tricky is that the government doesn’t use your current annual income to calculate this surcharge. Instead, it uses your income from two years ago. So, if you’re enrolling in Medicare in 2026, the government will use your income in 2024 for reference.

This is the part that catches most seniors off-guard, because they may still be working and earning near their peak in 2024. Or, you may have had a major windfall event that year — a bonus, severance package, a Roth conversion, or the sale of an investment property can all push income into a higher bracket, triggering a surcharge that lasts the entire year.

Simply put, if you didn’t plan for IRMMA and had exceptional income in 2024, your monthly premiums could be as high as $689.90 or up to $487 extra per month. That’s a huge hit in your mid-60s.

The good news is that this financial bomb can be avoided.

Avoiding IRMMA

There are essentially two ways to mitigate this issue: plan or appeal.

Planning is probably most effective. If you’re a few years away from age 65, take the time to understand the system and weave it into your retirement plan. This will help you time property sales or Roth conversions with all the rules in mind so that you never get hit with an unnecessary penalty.

Understanding the system should also let you discover and plan for its limitations. For instance, Medicare doesn’t generally cover the cost of long-term care, which can be a huge surprise cost in your senior years. Here, signing up for private insurance can protect you.

Long-term care insurance offers coverage for the costs of in-home assistance, nursing homes or assisted living facilities.

According to the latest CareScout Cost of Care Survey, the median annual cost of living in an assisted living community or a semi-private room in a nursing home could be $74,400 and $114,975, respectively.

That’s an annual estimate, which means a typical senior can quickly burn through their nest egg within a few years of unplanned and uninsured long-term care.

Without proper planning, paying for long-term care could deplete your retirement fund. In many cases, the burden of paying for care often falls on family members — potentially straining their own finances.