I talk to people every single week who are paying hundreds -- sometimes thousands -- more than they need to for Medicare. Not because they're careless, but because nobody told them the rules before it was too late. Medicare has real deadlines, real penalties, and real consequences for getting it wrong. Here are the five mistakes I see most often, and every one of them is avoidable.
1. Missing Your Initial Enrollment Window
The consequence: A permanent penalty you'll pay for the rest of your life
This is the one that makes me want to shout from the rooftops. You get a seven-month window to enroll in Medicare -- three months before you turn 65, your birthday month, and three months after. Miss it, and Medicare adds a 10% penalty to your Part B premium for every 12-month period you were eligible but didn't sign up. That penalty never goes away.
I had a client come to me who'd been without coverage for two years after turning 65 because she assumed her husband's employer plan covered her automatically. It didn't. She now pays roughly $35 extra per month on her Part B premium -- permanently. Over a 20-year retirement, that's over $8,000 in penalties alone.
How to avoid it
Mark your calendar three months before you turn 65. If you're still working and have employer coverage, talk to a broker before you assume you're in the clear. The rules around employer coverage and Medicare coordination are genuinely confusing, and the stakes are too high to guess.
2. Choosing a Plan Based on Premium Alone
The consequence: You save $40/month on premiums but spend $3,000 more when you actually need care
I see this constantly. Someone picks the plan with the lowest monthly premium, feels good about it, then ends up in the ER or needs a specialist and gets hit with a massive bill they weren't expecting. A $0-premium Medicare Advantage plan can look incredible on paper -- until you realize it has a $7,500 out-of-pocket maximum and your preferred cardiologist isn't in network.
How to avoid it
Look at the full picture before you commit. That means checking:
- Out-of-pocket maximums (what's your worst-case scenario?)
- The drug formulary (are your medications covered, and at what tier?)
- Provider networks (are your current doctors in-network?)
- Copays and coinsurance for the services you actually use
The "cheapest" plan is the one that costs you the least overall -- not just on the monthly bill.
3. Skipping Prescription Drug Coverage
The consequence: A penalty that grows every single month you wait
People tell me all the time, "I don't take any medications, so why would I pay for drug coverage?" Here's why: if you go without creditable Part D coverage and later need it, Medicare charges you a late enrollment penalty of 1% of the national base premium for every month you were eligible but didn't enroll. And like the Part B penalty, it's permanent.
Medications aren't something you plan for. One diagnosis can put you on three new prescriptions overnight. I've watched clients go from "I don't need Part D" to paying $400/month for a single medication -- plus the late enrollment penalty on top of it.
How to avoid it
Get a basic Part D plan in place even if you're healthy right now. Many plans cost under $10/month. Think of it as insurance for your insurance.
4. Not Reviewing Your Plan Every Year
The consequence: You're paying more for less -- and you don't even know it
Your Medicare plan can change every January 1st. Premiums go up, drug formularies shift, providers leave networks, and copay structures change. But most people never look. They set it and forget it -- and they overpay because of it.
I had a client last fall who'd been on the same Medicare Advantage plan for four years. When we reviewed it, we found that her primary medication had moved from Tier 2 to Tier 4. She was paying $120/month more for the same drug than she would have on a competing plan. Four years of that adds up fast.
How to avoid it
Every October 15th through December 7th is your Annual Enrollment Period. Use it. Even if you love your current plan, spend 20 minutes comparing -- or have a broker do it for free. You might save nothing. You might save $1,500. Either way, you'll know.
5. Trying to Figure It All Out Alone
The consequence: You make decisions based on incomplete information
Medicare has Original Medicare, Medicare Advantage, Medigap supplements, Part D drug plans, and Special Needs Plans -- all with different rules, networks, and costs. The Medicare.gov plan finder is a start, but it can't tell you which plan actually works best for your doctors, your medications, and your budget.
How to avoid it
Work with an independent broker. I compare plans across multiple carriers, and it costs you nothing -- brokers are paid by the insurance companies, not by you. There's no pressure, no sales pitch. Just someone who does this every day and can tell you what you're actually looking at.
Not sure if you're on the right plan -- or about to make one of these mistakes? Book a free consultation and let's look at your situation together. No strings, no pressure, just clarity.