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Turning 65 in 2026 means it’s time to enroll in Medicare. This step-by-step timeline shows exactly when to prepare, what to research, and how to avoid costly late enrollment penalties.
12 Months Before Your 65th Birthday: Start Medicare Education
Begin learning about Medicare basics now to make informed decisions later. Understanding the different Medicare parts is essential:
- Medicare Part A – Hospital insurance coverage
- Medicare Part B – Medical insurance for doctor visits and outpatient care
- Medicare Part C (Medicare Advantage) – Combined Part A and B coverage through private insurers, often with additional benefits
- Medicare Part D – Prescription drug coverage
- Medigap (Medicare Supplement Insurance) – Additional coverage to fill gaps in Original Medicare
Starting early gives you time to understand how each part works and which options suit your healthcare needs.
9 Months Before: Research Medicare Costs and Eligibility
Now that you understand Medicare coverage options, examine the costs based on your personal situation.
Check Your Part A Eligibility
Most people qualify for premium-free Medicare Part A if they or their spouse worked and paid Medicare taxes for at least 10 years (40 quarters). If you qualify, you won’t pay monthly premiums for Part A hospital insurance.
Understand Part B Costs
If you enroll in Medicare Part B, you’ll pay monthly premiums regardless of your work history. The 2026 standard Part B premium will be announced by CMS in late 2025. For reference, the 2025 standard Part B premium is $185.00 per month. At this point we do not know for certain what Part B premium will be but it is projected to be $206.50
Review Additional Medicare Expenses
Consider all potential Medicare costs:
- Monthly premiums
- Annual deductibles
- Copayments for services
- Coinsurance amounts
IRMAA: High-Income Medicare Surcharges
If you’re a high earner, you’ll pay Income-Related Monthly Adjustment Amounts (IRMAA) on top of your Medicare Part B and Part D premiums. IRMAA is determined based on your Modified Adjusted Gross Income (MAGI) from two years prior.
For 2026, your IRMAA will be based on your 2024 tax return. The specific 2026 IRMAA thresholds will be announced by CMS in late 2025, but they typically adjust annually with inflation. As a reference point, 2025 IRMAA begins at income levels above $106,000 for individual filers and $212,000 for joint filers.
Conversely, if your income falls below certain thresholds, you may qualify for Medicare Savings Programs that help cover premiums and other costs.
6-9 Months Before: Plan Your Medicare Transition
Determine your transition strategy from current health insurance to Medicare coverage.
Still Working at 65?
If you plan to continue working past age 65 with employer health coverage from a company with 20 or more employees, you may be able to delay enrolling in certain Medicare parts without penalties. However, you should:
- Verify your employer coverage qualifies as creditable coverage
- Set a target retirement date
- Understand how employer coverage coordinates with Medicare
- Time your Medicare enrollment to avoid coverage gaps or late enrollment penalties
This planning ensures smooth coverage transitions without interruptions or extra costs.
4-6 Months Before: Choose Your Medicare Plan
Consider meeting with a licensed Medicare insurance agent or using official Medicare resources to finalize your coverage choices. Key decisions include:
Original Medicare vs Medicare Advantage
- Original Medicare (Parts A and B) offers nationwide coverage with freedom to choose providers who accept Medicare
- Medicare Advantage (Part C) bundles coverage through private insurers, typically includes prescription drug coverage, and often adds benefits like dental, vision, and hearing coverage
Additional Coverage Decisions
- Medicare Part D – Standalone prescription drug coverage (if choosing Original Medicare without Part D)
- Medigap – Supplemental insurance to cover Original Medicare out-of-pocket costs like deductibles and coinsurance
Verify Provider Networks
Check that your preferred doctors, hospitals, and pharmacies:
- Accept Medicare
- Participate in the Medicare Advantage network you’re considering (if applicable)
- Are included in your Part D prescription drug plan formulary
1-3 Months Before: Enroll During Your Initial Enrollment Period
Your Initial Enrollment Period (IEP) is a seven-month window to sign up for Medicare:
- 3 months before the month you turn 65
- Your birthday month
- 3 months after the month you turn 65
Special rule: If your birthday falls on the first day of any month, your Medicare eligibility begins the first day of the previous month, and your IEP starts accordingly.
When Does Medicare Coverage Start?
Your coverage start date depends on when you enroll:
- Enroll 1-3 months before your birthday month: Coverage begins the first day of your birthday month (or the month before if your birthday is on the 1st)
- Enroll during your birthday month: Coverage starts the first day of the following month
- Enroll 1-3 months after your birthday month: Coverage begins 1-3 months after enrollment
Avoid Late Enrollment Penalties
Missing your Initial Enrollment Period can result in permanent late enrollment penalties that increase your premiums for as long as you have Medicare. The Part B penalty is 10% for each 12-month period you were eligible but didn’t enroll. Mark your calendar and enroll on time.
After Medicare Enrollment: Final Steps
Receive Your Medicare Card
Watch your mail for your red, white, and blue Medicare card showing your Medicare Number (not your Social Security Number). If you enrolled in Medicare Advantage or Part D, you’ll receive separate ID cards from those plan providers.
Review Your Evidence of Coverage
Your Evidence of Coverage (EOC) explains your benefits, costs, and coverage rules. You’ll receive information about how to access it online, or you can request a printed copy from your plan.
Schedule Your Welcome to Medicare Visit
Within your first 12 months of Medicare Part B coverage, schedule your free “Welcome to Medicare” preventive visit. This one-time appointment:
- Is available at no cost with no deductible or coinsurance
- Reviews your medical and social history
- Establishes your health baseline
- Includes screenings and referrals
- Provides personalized prevention plan
This checkup helps you start your Medicare journey with preventive care planning.
Medicare Enrollment Timeline FAQ
When should I start preparing for Medicare?
Begin researching Medicare options 12 months before your 65th birthday to understand coverage types and costs.
How long is the Medicare Initial Enrollment Period?
Your IEP lasts seven months total: three months before your birthday month, your birthday month, and three months after.
Can I delay Medicare enrollment if I’m still working?
You may be able to delay enrollment in Part B if you have qualifying employer coverage from a company with 20 or more employees. However, you should still enroll in Part A if it’s premium-free. Consult with your HR department and Medicare before making this decision.
What happens if I miss my Medicare enrollment deadline?
Missing your Initial Enrollment Period results in late enrollment penalties that can permanently increase your premiums. You may also have to wait until the General Enrollment Period (January 1 – March 31) to sign up, with coverage starting July 1.
Do I need to enroll in all parts of Medicare?
No. Your enrollment depends on your circumstances, such as whether you’re still working, have other coverage, or need prescription drug coverage. At minimum, most people enroll in Part A if it’s premium-free.
Where can I enroll in Medicare?
You can enroll online at SSA.gov, by calling Social Security at 1-800-772-1213, or by visiting your local Social Security office.
This Medicare enrollment timeline for 2026 helps you prepare for one of the most important healthcare decisions you’ll make. Start early, understand your options, and enroll on time to maximize your benefits while avoiding penalties. For the most current premium and cost information, visit Medicare.gov or consult with a licensed Medicare advisor.