401(h) Plan Contribution Limits and Funding Rules Explained
There is no IRA-style number that caps 401(h) funding. Funding is actuarial, ongoing, and constrained by the incidental-benefit ceiling.
Contents
Key takeaways
- No single statutory dollar cap on 401(h) funding.
- The incidental-benefit rule effectively caps medical funding relative to retirement funding.
- Funding is actuarial and revisited annually.
- Demographic shifts can change the funding picture year over year.
Not a flat dollar limit
Unlike an IRA or HSA, 401(h) contributions are not capped by a single statutory dollar figure. The amount the employer contributes for medical benefits is determined by the plan's actuary, tied to the projected stream of retiree medical benefits and to the plan's overall funding methodology.
The incidental-benefit ceiling
The functional ceiling is the incidental-benefit rule: aggregate contributions for medical benefits must remain subordinate to aggregate contributions for retirement benefits over the life of the plan. Practitioners commonly apply tests that monitor this ratio annually.
What drives the number
Funding depends on the size and demographics of the eligible retiree class, the assumed cost of qualifying medical benefits, investment return assumptions, mortality, and the funding method used for the underlying plan.
Why it changes over time
Annual valuations re-estimate the medical-benefit liability and the resulting funding requirement. Demographic shifts, plan amendments, and capital-markets experience can all move the number meaningfully.
Frequently asked questions
Availability, tax treatment, and plan design depend on the facts and circumstances of the employer, plan document, participant group, and applicable law. 401h.com provides general educational information only — not tax, legal, actuarial, investment, or ERISA advice. Consult qualified tax, legal, actuarial, and plan professionals.
401h.com Editorial
401h.com
The 401h.com editorial team publishes plain-English explainers on 401(h) retiree medical benefit plans. Educational only — not tax, legal, actuarial, investment, or ERISA advice.
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