Working Past 65 ? | 3 Medicare Tips You Need to Know!

Should I Keep My Employer Health Coverage or Switch to Medicare While Working Past 65?

Direct answer: If you’re actively employed by a company with 20 or more employees and have creditable coverage, you genuinely have a choice — stay on your employer plan and delay Medicare, or switch to Medicare even while still working. For the underlying eligibility rules (the 20-employee threshold, spousal coverage, active vs. COBRA coverage), see our full guide to working past 65 and common pitfalls to avoid. This piece focuses specifically on how to actually make that choice once you know you have it.

What Determines Whether I Have a Real Choice?

If you don’t meet both conditions — active employment with an employer of 20 or more employees, and creditable coverage — you’ll likely want to enroll in Medicare at 65 regardless, since delaying without those conditions in place typically means facing a late enrollment penalty. If you do meet both conditions, you’re in genuine decision territory, and the right answer depends on two specific questions.

How Do I Decide Between My Employer Plan and Medicare?

Question one: Do you have dependents on your employer plan who aren’t yet Medicare-eligible? If your spouse or another dependent relies on your employer coverage and isn’t old enough for Medicare themselves, dropping that plan means finding separate coverage for them — Medicare only covers you individually, never a spouse or dependents. This alone can be reason enough to keep the employer plan, even if Medicare alone would otherwise look more appealing.

Question two: How good is your employer coverage, honestly? Compare your actual employer plan costs and benefits — premiums, deductibles, coinsurance, and out-of-pocket maximum — directly against what Medicare (potentially paired with a Medigap Supplement) would cost and cover for the same situation. This isn’t a given either way: some employer plans are genuinely excellent and worth keeping; others are expensive or limited enough that Medicare, even with an added Medigap premium, ends up being the better value and better coverage.

The mistake to avoid: assuming that because you can delay Medicare, you automatically should. Being eligible to delay isn’t the same as delaying being financially optimal for your situation. Run the actual comparison rather than defaulting to whichever option requires less immediate action.

What Should I Do Before I Actually Retire?

When you’re ready to transition off your employer plan and onto Medicare, you’ll need to document your prior creditable coverage using Form CMS-L564. Your HR department is often familiar with this process, but if not, it’s straightforward to obtain directly. For the complete walkthrough — including a detail that trips a lot of people up, that this form must be submitted together with your actual Part B application, not on its own — see our complete guide to Form CMS-L564.

What Should I Figure Out Before I Need Medicare?

The third piece of this is simply getting educated before you’re under time pressure. Two decisions worth settling in your mind well ahead of your actual transition:

• When will you actually enroll in Part A and Part B? Whether that’s at 65, or later when your employer coverage ends, know your specific timeline and enrollment window rather than figuring it out reactively.
• Medigap Supplement or Medicare Advantage? These represent genuinely different structures — nationwide flexibility with predictable costs versus a network-based plan with bundled extras — and deciding under time pressure right as your employer coverage ends is a worse position than having already thought it through.

Working through these questions early means that when your actual transition date arrives, you’re executing a plan rather than making decisions from scratch under a deadline.

Bottom Line

Working past 65 with employer coverage genuinely does give you a choice, not just a default — but making that choice well means comparing your actual employer plan against Medicare honestly, accounting for any dependents who’d lose coverage, and getting your CMS-L564 documentation and enrollment timeline sorted out before you’re up against a deadline. Don’t let “I’m eligible to delay” substitute for actually running the comparison.

Key Takeaways

• If you’re actively employed by a company with 20+ employees and have creditable coverage, you have a genuine choice between staying on your employer plan or switching to Medicare — it’s not automatic either way.
• Dependents on your employer plan who aren’t yet Medicare-eligible are a major factor, since Medicare only covers you individually.
• Compare your actual employer plan’s costs and coverage against Medicare plus a potential Medigap Supplement rather than assuming either option is automatically better.
• Being eligible to delay Medicare doesn’t mean delaying is the financially optimal choice for your specific situation.
• Form CMS-L564 documents your prior creditable coverage and must be submitted together with your Part B application when you do transition to Medicare.
• Deciding on your enrollment timeline and Medigap-versus-Advantage preference before you need to act avoids rushed, reactive decision-making.

FAQ – Working Past 65

Should I keep my employer health plan or switch to Medicare while working past 65?
It depends on whether you have dependents relying on your employer coverage and how your employer plan’s actual costs and benefits compare to Medicare — there’s no universal answer.

Does having employer coverage mean I should automatically delay Medicare?
No. Being eligible to delay isn’t the same as delaying being the better financial choice — compare the actual costs and coverage before deciding.

What happens to my spouse’s coverage if I switch from my employer plan to Medicare?
Medicare only covers you individually, so a spouse or dependent who isn’t yet Medicare-eligible would need separate coverage if you drop your employer plan.

What form do I need when I transition from employer coverage to Medicare?
Form CMS-L564, which documents your prior creditable coverage and must be submitted alongside your Part B enrollment application.

When should I start planning my Medicare transition if I’m working past 65?
Well before you actually need to enroll — deciding your enrollment timeline and Medigap-versus-Advantage preference in advance avoids rushed decisions under deadline pressure.