Medicare premiums and deductibles increased in 2026 from 2025. The standard Medicare Part B premium rose to $202.90 per month this year, up from $185 in 2025. Meanwhile, the annual deductible increased to $283, according to the U.S. Centers for Medicare & Medicaid Services.
Given the rising costs, waiting too long to enroll in Medicare can result in higher rates for the rest of your life, in addition to putting you at risk of a lapse in health insurance coverage. To help you avoid falling into that trap, let’s go over how Medicare enrollment works.
Read more: How to enroll in Medicare online today: Step-by-step guide
When should you enroll into Medicare?
There is a seven-month timeframe for your first Medicare enrollment. It starts three months prior to your 65th birthday and concludes three months following.
You can enroll in Medicare Parts A and B during that initial enrollment period. Part A covers hospital care, while Part B covers outpatient care.
During this window, beneficiaries can:
- Enroll or switch from one Medicare Advantage plan to another
- Return to Original Medicare (Parts A and B)
- Add a Part D prescription drug plan if they leave Medicare Advantage
You will be automatically enrolled in Parts A and B if you are receiving Social Security benefits at the time of your first Medicare enrollment window. If not, you must actively register on your own.
Read more: Will you get Social Security payment on March 11? Check schedule and eligibility
What happens when you miss the deadline to enroll into Medicare?
You will have subsequent opportunities to enroll in Medicare if you do not do so during your initial enrollment window.
However, according to USA Today, if you miss that initial enrollment window, you may be subject to lifetime Medicare premium increases.
- For every 12 months that you were eligible for Medicare Part B coverage but chose not to join, there will be a 10% premium surcharge.
- If you do not have creditable medication coverage for 63 days or longer after the end of your initial enrollment period, you will then be subject to surcharges for Medicare Part D.
You should be aware that you can usually avoid these penalties if you sign up during the special enrollment period you receive because of these conditions, provided that you are still employed and covered by a qualifying group health plan at the time of your original Medicare enrollment window.
However, waiting on Medicare could prove to be an expensive error if you are not qualified for a special enrollment period.