Turning 65 and Your Marketplace Plan

Turning 65 brings Medicare eligibility — and a transition most Marketplace enrollees botch. The rules are unforgiving: keep your Marketplace plan too long and you can face late-enrollment penalties and lose tax credits; leave too early and you gap yourself. (Note: I don't handle Medicare enrollment — this is the Marketplace-side guidance; talk to a Medicare specialist for the Medicare half.)

The critical rules

• Tax credits end with Medicare: once you're eligible for premium-free Part A, you're generally ineligible for Marketplace tax credits — keeping them means repaying at tax time.
• Enroll in Medicare on time: your Initial Enrollment Period spans 7 months around your 65th birthday. Delaying Part B without creditable coverage triggers lifetime late penalties.
• Cancel the Marketplace plan: once Medicare starts, terminate your Marketplace coverage — overlapping coverage wastes premiums and complicates claims.
• Working past 65: if you have creditable employer coverage, you may delay Medicare without penalty — but verify "creditable" status; small-employer plans often don't qualify.

Timing the handoff

Apply for Medicare before your 65th birthday month (coverage can start the month you turn 65 if you apply in the 3 months prior). Coordinate your Marketplace termination to the Medicare start date — no gap, no overlap. If your birthday falls mid-year, this planning should happen in the spring, not the fall.

Spouses and dependents

Your 65th birthday doesn't end their Marketplace eligibility — a younger spouse and kids can stay on the Marketplace plan (recalculated for the smaller household). Don't cancel the family plan reflexively; transition yourself and reconfigure the rest.

Common turning-65 mistakes

• Keeping the Marketplace plan with tax credits after Medicare starts — you'll repay the credits; terminate on time.
• Missing the Initial Enrollment Period — lifetime Part B penalties are forever; calendar the 7-month window.
• Assuming employer coverage is creditable — small-employer plans often aren't; verify before delaying Medicare.
• Canceling the family plan reflexively — younger family members keep their eligibility; reconfigure, don't just cancel.

Pro tip: start planning in the spring of your 65th year — Medicare application, Marketplace termination timing, and (separately) Medicare coverage selection with a Medicare specialist.

The bottom line

Sixty-five is a handoff, not a cliff — time your Medicare enrollment, terminate Marketplace tax credits on schedule, and reconfigure (don't reflexively cancel) family coverage. Start planning in the spring.

Key takeaway

Enroll in Medicare on time, terminate Marketplace tax credits on schedule, verify whether employer coverage is truly creditable before delaying, and reconfigure rather than reflexively cancel family coverage. Spring planning for a 65th-birthday year.

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