There is a penalty baked into Medicare that almost nobody warns you about until after it is too late. It is not a one-time fine. It does not go away after a year. It is a permanent increase in your monthly Medicare Part B premium that follows you for the rest of your life.
Understanding this penalty — what triggers it, what it costs, and how to avoid it — is probably the single most valuable thing you can do before you turn 65.
Medicare Part B covers outpatient medical care: doctor visits, lab tests, outpatient surgery, preventive care, and medical equipment. It has a monthly premium — $202.90 per month in 2026 for most people, deducted directly from your Social Security check before you ever see it.
If you do not enroll in Part B during your Initial Enrollment Period — and you do not have a qualifying reason to delay — Medicare adds a 10% surcharge to your Part B premium for every 12-month period you could have had Part B but did not.
| Years late | Penalty added | Monthly premium (2026) | Annual extra cost |
|---|---|---|---|
| 1 year late | 10% | $223.19/month | +$242.88/year |
| 2 years late | 20% | $243.48/month | +$485.76/year |
| 3 years late | 30% | $263.77/month | +$728.64/year |
| 5 years late | 50% | $304.35/month | +$1,214.40/year |
Those numbers are based on 2026 premiums. The penalty percentage is permanent, but the dollar amount grows over time as the standard premium increases. A 20% penalty means you pay 20% more than whatever the current standard premium is — forever.
If you were 2 years late and live another 20 years in retirement, that penalty could cost you nearly $10,000 in total over your lifetime — money that could have been completely avoided.
You can delay Part B without penalty if you have "qualifying coverage" — meaning active health insurance through your own current employment or a spouse's current employment, from an employer with 20 or more employees.
These things do not count as qualifying coverage:
If you delayed Part B because you had qualifying employer coverage, you get a Special Enrollment Period (SEP) when that coverage ends. You have 8 months from the day your employment-based coverage ends to sign up for Part B without a penalty.
One critical warning: do not wait until day 240 of that 8-month window. Apply as soon as you know your employer coverage is ending to avoid any gap. The Part B application takes time to process.
If you believe you have a penalty that was applied incorrectly, you can appeal. If you had qualifying coverage that Medicare was not aware of, gather documentation (like an employer letter on company letterhead stating your coverage dates and employer size) and request reconsideration. The process is not simple, but wrongly applied penalties have been reversed.
If the penalty was correctly applied — meaning you genuinely missed your window without qualifying coverage — there is no way to remove it. The best you can do is manage forward.
Reminder: Ready at 65 is not affiliated with Medicare, CMS, the SSA, or any government agency. This article is general educational information, not financial, legal, medical, or insurance advice. Rules, costs, and deadlines change — verify current details at Medicare.gov or by calling 1-800-MEDICARE before making any decision. Full disclaimer →