HSA Certification for HR Professionals: What You Need to Know in 2027

6/5/2026

Health Savings Accounts look simple from the outside: a tax-advantaged account paired with a high-deductible plan. The complexity is in eligibility — a set of disqualifying conditions that employees trip over constantly, usually without knowing, and usually in ways the employer facilitated.

Quick answer: HSA administration is an eligibility compliance function more than a benefits function. HR's core responsibilities are confirming HDHP qualification, screening for disqualifying coverage, applying contribution limits and proration rules correctly, and handling the coordination points with FSAs, Medicare, and COBRA. Training in these rules is what "HSA certification" means in practice.

The Four Eligibility Requirements

To contribute to an HSA for a month, an individual must, as of the first day of that month:

1. Be covered by a qualifying high-deductible health plan (HDHP).
2. Have no other health coverage, with limited exceptions for permitted insurance and preventive care.
3. Not be enrolled in Medicare.
4. Not be claimed as a dependent on another person's tax return.

Requirement 2 is where nearly all problems originate.

The Disqualifying Coverage Traps

Situation	Effect on HSA Eligibility
Enrolled in a general-purpose health FSA	Disqualifying
Spouse enrolled in a general-purpose health FSA that can reimburse the employee's expenses	Disqualifying — even though the employee is not enrolled
Limited-purpose FSA (dental and vision only)	Permitted
Post-deductible HRA	Permitted if properly designed
General-purpose HRA	Disqualifying
Health FSA grace period with a remaining balance	Disqualifying for the entire grace period
Health FSA carryover balance	Disqualifying unless the carryover goes into a limited-purpose FSA
Enrolled in any part of Medicare	Disqualifying, including Part A only
Receiving VA medical benefits	Disqualifying for a period after receiving non-preventive care, with an exception for service-connected disability
On-site clinic providing significant medical care free of charge	Potentially disqualifying
Telehealth with no cost sharing	Treatment has varied by legislation — confirm current-year rules

The spouse-FSA trap deserves emphasis. An employee electing an HSA at your open enrollment may be ineligible because their spouse elected a general-purpose FSA at a different employer, and neither of them knows it. Nothing in either enrollment system detects the conflict.

The Medicare Trap

This is the most common HSA error among employees over 65, and employers frequently contribute to it.

Two mechanics compound:

• Any Medicare enrollment disqualifies, including premium-free Part A that people enroll in without thinking of it as "having Medicare."
• Enrollment in Part A is retroactive — typically up to six months, but not earlier than the month of eligibility — when an individual enrolls after age 65. That retroactivity can make contributions already made in prior months excess contributions.

Practical guidance: employees approaching 65 who intend to keep contributing to an HSA should receive proactive communication about the interaction, well before they apply for Social Security benefits — because applying for Social Security triggers automatic Part A enrollment.

Contribution Rules HR Must Apply Correctly

Annual limits

Limits are indexed annually by the IRS and differ for self-only and family HDHP coverage, with an additional catch-up contribution available beginning at age 55. Insert the current-year figures into your enrollment materials and update them every year — stale limits in benefits communications are a recurring audit finding.

The monthly proration rule

An individual eligible for only part of the year may generally contribute only a prorated amount — one-twelfth of the annual limit for each month they were eligible as of the first day of the month.

The last-month rule and testing period

An individual who is eligible on December 1 may contribute the full annual maximum for that year. But they must remain eligible through the end of the following calendar year — the testing period. Failing the testing period makes the excess amount includible in income and subject to an additional tax.

This rule generates real problems when an employee uses it and then changes jobs, enrolls in Medicare, or switches plans the following year. HR should flag it rather than promote the last-month rule as free money.

Employer contributions and comparability

Employer HSA contributions made outside a Section 125 cafeteria plan are subject to comparability rules requiring comparable contributions for all comparable participating employees. Contributions made through a cafeteria plan are instead subject to Section 125 nondiscrimination rules.

Most employers contribute through the cafeteria plan, which provides more flexibility — but the choice must be deliberate and documented, not accidental.

Coordination Points HR Owns

• Open enrollment design. Offer a limited-purpose FSA alongside the HDHP so employees are not forced to choose between an FSA and HSA eligibility.
• FSA carryover routing. Direct carryover balances for HSA-eligible employees into a limited-purpose FSA, or make the carryover election explicit.
• Mid-year status changes. Marriage, divorce, birth, and coverage-tier changes all affect the applicable limit and require recalculation.
• The HDHP is subject to COBRA continuation; the HSA itself is not a group health plan and does not continue — but a COBRA participant on an HDHP may remain HSA-eligible.
• The HSA belongs to the employee and travels with them. Employer contributions generally cannot be recouped.
• Contributions through a cafeteria plan are exempt from federal income tax, Social Security, and Medicare tax — a significant employer savings that is sometimes not configured correctly.

The Six Most Common Employer Errors

1. Offering a general-purpose FSA alongside the HSA without explaining that electing both destroys eligibility.
2. Not screening for spousal FSA coverage at enrollment.
3. Contributing for employees enrolled in Medicare, particularly Part A only.
4. Failing to prorate for mid-year hires and mid-year eligibility changes.
5. Using stale contribution limits in enrollment materials.
6. Treating the HSA as an employer plan subject to ERISA when it is generally not, provided employer involvement remains limited — excessive employer involvement can inadvertently create an ERISA plan with all of the attendant obligations.

What "HSA Certification" Should Cover

There is no licensing requirement for HSA administration. Useful training covers: eligibility determination and disqualifying coverage, HDHP qualification standards, contribution limits and proration, the last-month rule and testing period, employer contribution rules and comparability, coordination with FSAs, HRAs, Medicare, and COBRA, reporting requirements, and correction procedures for excess contributions.

See HSA compliance requirements for employers and the HSA administration FAQs.

Frequently Asked Questions

Can an employee have an HSA and an FSA?

Only if the FSA is limited-purpose (dental and vision) or post-deductible. A general-purpose health FSA — the employee's own or a spouse's — destroys HSA eligibility.

What happens if an ineligible employee contributes?

Excess contributions are includible in income and subject to an additional tax if not corrected. Correction procedures exist, but they are the employee's responsibility — which is why prevention through screening matters.

Does an HSA continue under COBRA?

The HDHP does. The HSA is not a group health plan and does not continue, though the account remains the individual's property and can be used for qualified expenses including COBRA premiums in some circumstances.

Are employer HSA contributions taxable to the employee?

No, when made for an eligible individual within the annual limit. Contributions through a cafeteria plan are also exempt from FICA for both parties.

Who is responsible if an employee turns out to be ineligible?

Tax consequences fall on the individual. But employers that facilitated the error — by offering a disqualifying FSA without explanation, or by contributing for a Medicare-enrolled employee — face employee relations problems and potential plan-level exposure.

Build Benefits Compliance Depth

HSA errors are eligibility errors, and eligibility rules are learnable. The employers who avoid them are the ones whose benefits staff know the disqualifying-coverage list cold.

Explore the Cafeteria Plan Training Program for Section 125 mechanics, the COBRA Training & Certification Program for continuation coordination, and the Certified HR Administrator designation for a broader benefits administration credential.

👉 Explore HR certification courses →

Additional resources: Best Practices for HSA Compliance | Cafeteria Plan FAQs | IRS Publication 969