For most people, enrolling in the 3 months before their 65th birthday month is the safest way to avoid delays in coverage. Your Initial Enrollment Period (IEP) is a 7-month window — 3 months before, your birthday month, and 3 months after — but enrolling in those first 3 months ensures coverage starts on the first day of your birthday month with no gap.
Key takeaway: To guarantee no coverage gap, enroll during the 3 months before your 65th birthday month — your coverage starts the 1st of that month.
Yes — but only under the right conditions. If your employer has 20 or more employees, many workers can delay Part B while covered by an active employer plan. If your employer has fewer than 20 employees, Medicare becomes your primary insurance at 65. COBRA and ACA Marketplace plans do not generally allow you to delay Part B without potential penalties.
Key takeaway: Employer size is the key factor. Confirm your specific circumstances with a licensed Medicare broker before delaying enrollment.
The Part B late enrollment penalty is 10% of the standard Part B premium for every full 12-month period you were eligible but didn't enroll without creditable coverage — and it's permanent. In 2026, the standard Part B premium is $202.90/month (CMS). A 24-month delay adds approximately $40.58/month to your premium for life.
Key takeaway: In 2026, every 12-month delay without creditable coverage adds ~$20.29/month to your Part B premium forever — the penalty never goes away.
Key takeaway: In 2026, the biggest cost surprise for Medicare Advantage enrollees is the OOP maximum — plans can legally require up to $9,250 out-of-pocket before catastrophic coverage kicks in.
IRMAA is a surcharge added to Part B and Part D premiums when your MAGI exceeds certain thresholds — based on your tax return from two years prior. In 2026, IRMAA applies to individuals with MAGI above $109,000 and married couples above $218,000. If your income has since dropped, you can appeal using SSA Form SSA-44.
Key takeaway: In 2026, IRMAA kicks in for individuals earning over $109,000 based on 2024 income — and it can be appealed if your income has since dropped.
AEP runs October 15 through December 7 each year. You can switch between Original Medicare and Medicare Advantage, change your MA plan, or add/drop/switch your Part D drug plan. All changes take effect January 1.
Key takeaway: AEP (Oct 15–Dec 7) is your annual window to optimize your Medicare coverage — review it every fall even if you're happy with your current plan.
Enroll online at ssa.gov/medicare, by phone at 1-800-772-1213, or in person at your local Social Security office. Apply 3 months before you turn 65. You'll need your Social Security number, proof of birth, and proof of U.S. citizenship. If already receiving Social Security, you'll be automatically enrolled.
Key takeaway: Most people enroll at ssa.gov/medicare — apply 3 months before your 65th birthday.
When active employment ends, you have an 8-month SEP to sign up for Part B without penalty. COBRA does not pause that clock — the 8-month window starts when your active employment ends, regardless of whether you elect COBRA.
Key takeaway: Once active employment ends, you have 8 months to enroll in Part B penalty-free — COBRA does not pause that clock.
VA health benefits do not count as creditable coverage for Medicare Part B. Delaying Part B while relying solely on VA care can trigger a permanent penalty. Having both gives you flexibility — VA care at VA facilities, Medicare everywhere else.
Key takeaway: VA coverage alone will not protect you from Medicare late enrollment penalties. Confirm your situation with a licensed broker before your 65th birthday.
No. Enrolling in any part of Medicare stops new HSA contributions. Existing funds remain available for most qualified medical expenses, including Part B and Part D premiums — but not Medigap premiums.
Key takeaway: Enrolling in Medicare — any part of it — stops new HSA contributions. Existing funds remain yours to use for most qualified medical expenses.
Steve Germain founded A&E Insurance Agency after watching his own grandfather struggle to navigate Medicare. Steve is a licensed insurance broker (NPN 19921707), licensed in 35 states, with 10+ years of experience and more than 3,000 clients guided through enrollment decisions. He is the author of Medicare Decoded: A Clear Guide for People Turning 65. Education first. Lifetime support. Always.
Current as of May 2026. All figures verified against CMS, SSA, and IRS official sources. This content is for educational purposes only.