The misconception that won't die
Many HR leaders believe Medicare-eligible employees cannot participate in an Individual Coverage HRA (ICHRA). They're wrong. But their confusion is understandable—the IRS rules are dense, the guidance has evolved, and vendors sometimes oversimplify the restrictions.
The truth is messier: Medicare-eligible employees can participate in ICHRAs under specific conditions. Violating those conditions triggers substantial penalties. Getting it right requires clarity about which rules apply and when.
What ICHRA actually is
An Individual Coverage HRA is an employer-funded account that reimburses employees for individual health insurance premiums and qualified medical expenses. Unlike traditional group health plans, the employee chooses their own coverage—whether through the ACA marketplace, Medicare Advantage, or other sources.
ICHRAs became formally available in 2020 and attracted growing interest because they:
- Reduce employer administrative burden
- Give employees choice and portability
- Often cost less than group coverage for certain employee populations
- Work well for distributed workforces and seasonal staff
The appeal is real. But when Medicare enters the picture, the rules tighten dramatically.
The Medicare coordination rule: what it actually says
Here's what the IRS prohibits: You cannot use an ICHRA to reimburse premiums for Medicare supplemental (Medigap) coverage or Medicare Advantage premiums.
That's the core rule. But people misread it in two directions.
Over-restrictive interpretation: Some HR teams conclude that any Medicare-eligible employee cannot use an ICHRA at all. This ignores several real pathways for participation.
Under-restrictive interpretation: Other teams assume that as long as they don't explicitly reimburse Medicare premiums, they're fine. This ignores the "primary coverage" intent behind the rule.
The IRS cares about intent. If an ICHRA functionally exists to bridge the gap between retirement and Medicare eligibility—or to subsidize Medicare supplemental costs in disguise—it violates the rule.
When Medicare-eligible employees CAN participate
There are three legitimate scenarios where a Medicare-eligible person can use an ICHRA:
1. Retirees under 65 who haven't enrolled in Medicare yet
An employee who retired at 62 and doesn't qualify for Medicare until 65 can participate in an ICHRA during that window. The ICHRA can reimburse their individual ACA marketplace premiums or other private coverage.
Key safeguard: Once they turn 65 and become Medicare-eligible, the ICHRA must terminate or be restructured to exclude them. Not doing this violates the coordination rule.
2. Employees who decline Medicare enrollment
If a Medicare-eligible employee affirmatively declines Medicare (documented), they technically can use an ICHRA for non-Medicare coverage. But this is a high-risk strategy because:
- The employee may later claim they never understood the requirement to decline
- Declining Medicare often triggers lifetime premium penalties
- Most employees should enroll, making this option rarely appropriate
We don't recommend this pathway for HR teams without explicit legal counsel.
3. Employees buying coverage before becoming Medicare-eligible
An employee hired at 63, not yet Medicare-eligible, can participate in an ICHRA that reimburses their private coverage premiums. That participation continues until they become Medicare-eligible, at which point you must modify the arrangement.
The enrollment coordination problem
Here's where many HR teams stumble: the coordination between ICHRA eligibility and Medicare eligibility timing.
When an employee turns 65 or becomes otherwise Medicare-eligible:
- They become eligible for Part A and Part B
- They have an Initial Enrollment Period (IEP) lasting 7 months
- If they don't enroll during their IEP, they face permanent late-enrollment penalties
An ICHRA cannot continue to reimburse an employee's private coverage once they're Medicare-eligible and haven't enrolled in Medicare. Why? Because you'd effectively be incentivizing them to forgo Medicare and accept penalties—a violation of federal coordination rules.
What must happen: Before an employee becomes Medicare-eligible, you need to:
- Notify them in writing (not email) about their Medicare enrollment obligation
- Explain their Initial Enrollment Period
- Provide CMS resources (Medicare.gov)
- Remove them from your ICHRA effective the date they become eligible
- Document that you provided notice
Many HR teams skip this. Some forget it entirely. When the IRS audits the ICHRA, missing documentation becomes evidence of an improper arrangement.
The "deemed coverage" trap
Here's a subtle rule that catches unprepared HR teams: If your ICHRA reimburses an employee's ACA marketplace premiums, and that employee is Medicare-eligible but hasn't disclosed it, the marketplace may impose penalties on the employee—and the IRS may scrutinize whether your ICHRA structure was appropriate.
Why it matters: The ACA and Medicare have different "creditable coverage" definitions. If someone is Medicare-eligible, they generally shouldn't be on the marketplace at all (with narrow exceptions). If your ICHRA facilitates that mismatch, you bear compliance risk.
Protect yourself by requiring employees to attest to their Medicare status annually—not a casual checkbox, but a documented, signed statement.
Common HR implementation mistakes
Mistake 1: Not screening for Medicare eligibility during ICHRA onboarding
Best practice: Ask all new participants whether they are Medicare-eligible or will become Medicare-eligible within 12 months. Document the answer.
Mistake 2: Assuming age 65 is automatic disqualification
It's not. The rule is about Medicare eligibility and enrollment status, not age. Someone could be 67 and not Medicare-eligible (rare but possible). Someone could be 64 and Medicare-eligible (if they became disabled or have ESRD).
Mistake 3: Failing to monitor life changes
An employee might qualify for Social Security Disability Insurance (SSDI) mid-year, triggering Medicare eligibility after 24 months on SSDI. Most HR teams don't track this. You should.
Mistake 4: Not removing terminated employees from ICHRA before Medicare enrollment deadlines
If you terminate an employee's ICHRA participation but don't formally notify them or provide the required timing, and they miss their Medicare Initial Enrollment Period, that creates liability.
The employer penalties for getting it wrong
The IRS doesn't treat ICHRA/Medicare violations lightly. Penalties include:
- $100 per day per employee for improper ICHRA arrangements (can reach $36,500 annually per employee)
- Excise taxes of up to 40% of the retiree health benefit value
- Loss of the ICHRA tax deduction for reimbursements deemed improper
- Potential ACA penalty if the arrangement affects workforce eligibility calculations
Most critical: these penalties are per-employee, per-day. A five-person ICHRA with coordination errors can generate six-figure liability within months.
What does compliant look like?
A compliant ICHRA/Medicare arrangement includes:
- Written eligibility criteria that explicitly address Medicare status
- Annual attestations from employees about their Medicare eligibility
- Termination protocols triggered before or at Medicare eligibility
- Written notice to employees about their Medicare enrollment obligations
- Documented removal dates from the ICHRA when employees become Medicare-eligible
- Tracking systems that flag potential Medicare eligibility triggers (SSDI, age milestones)
None of this is complicated, but it requires intentional design. Most ICHRA platforms don't enforce it—that burden falls on you.
The bottom line
Medicare-eligible employees aren't automatically banned from ICHRAs. But their participation requires tighter coordination, clearer documentation, and more active monitoring than typical ICHRA arrangements.
If your ICHRA includes any employees age 62 or older, or any employee approaching Medicare eligibility, audit your current processes now. Assume that you're missing something. Work with benefits counsel to close gaps before an IRS inquiry surfaces them.
The rules exist to prevent employers from disguising Medicare subsidy programs as employee choice vehicles. Respecting those rules protects both your compliance posture and your employees' Medicare eligibility rights.