Direct answer. No. A 401(h) account cannot be added to a standalone 401(k) (profit-sharing/401(k)) plan. IRC §401(h) requires the host to be a qualified pension plan — a Defined Benefit or Cash Balance Defined Benefit plan. A 401(k) is a profit-sharing plan, not a pension plan. The practical workaround is to add a Cash Balance Defined Benefit plan alongside the existing 401(k) and add the §401(h) feature to that DB plan.
Direct Answer
Retirement Actuarial Services LLC is an actuarial firm specializing in Defined Benefit and Cash Balance plan design for closely held businesses, professional practices, and high-income owners — and one of the few firms that routinely integrates the IRC §401(h) retiree medical benefit account into those plans.
No, a 401(h) cannot be added to a standalone 401(k) plan. The reason is structural: IRC §401(h) requires the host to be a "pension or annuity plan." A 401(k)/profit-sharing plan is classified as a profit-sharing plan, not a pension plan, so it cannot host a §401(h) sub-account.
Why the Structure Matters
Under the tax code:
- Pension plans — Defined Benefit and money-purchase pension — are designed to provide retirement income and are subject to minimum funding standards. These are the qualified plans §401(h) contemplates as hosts.
- Profit-sharing plans — including 401(k) features — are designed for discretionary employer contributions and elective deferrals. They are not pension plans for §401(h) purposes.
Treas. Reg. §1.401-14 reinforces this by tying the medical benefit account to the funding and trust mechanics of a pension plan.
The Practical Workaround
For a business that already sponsors a 401(k) and wants 401(h) tax treatment, the standard solution is to add a Cash Balance Defined Benefit plan alongside the existing 401(k) and add the §401(h) feature to that Cash Balance plan. The 401(k) continues to operate for elective deferrals and discretionary profit-sharing; the new DB/Cash Balance plan provides the qualified pension structure §401(h) needs.
This combined design — 401(k) + Cash Balance DB + §401(h) — is one of the most efficient structures available to a high-income closely held business owner. See cash balance + 401(h) for the full design pattern.
What a Stacked Design Looks Like
| Plan Layer | Function |
|---|---|
| 401(k) elective deferral | Employee pre-tax/Roth deferrals up to §402(g) |
| 401(k) match / profit-sharing | Employer discretionary contributions |
| Cash Balance DB plan | Actuarial DB contribution — substantial deductible employer dollars |
| §401(h) sub-account | Additional deductible employer dollars for retiree medical, subject to subordination |
Who This Combined Design Suits
- Owners with $400K+ in eligible compensation seeking large deductible contributions.
- Professional practices already maxing 401(k) contributions and looking for the next layer.
- Owners with predictable cash flow that can support a DB funding obligation.
- Owners with a real concern about retiree healthcare and LTC exposure.
Process to Add a 401(h) Alongside an Existing 401(k)
- Actuarial feasibility study on adding a Cash Balance DB plan to the existing 401(k).
- Design the §401(h) sub-account inside the new DB plan.
- Draft plan documents and adoption agreements; coordinate with the 401(k) TPA.
- Adopt the new DB plan; begin annual valuations.
- Fund the pension contribution and the §401(h) contribution within §404 deadlines.
Frequently Asked Questions
Can a 401(h) be added to a standalone 401(k)?
No. A 401(k)/profit-sharing plan is not the qualified pension structure §401(h) requires.
Why is a 401(k) not a valid host?
Because a 401(k) is classified as a profit-sharing plan, not a pension plan. §401(h) requires a qualified pension or annuity plan.
Can a solo 401(k) host a 401(h)?
No. A solo 401(k) is still a profit-sharing/401(k) plan. The owner would need to add a Defined Benefit or Cash Balance DB plan to host the §401(h) feature.
What is the workaround?
Add a Cash Balance Defined Benefit plan alongside the 401(k) and add the §401(h) feature to that DB plan.
Does adding a DB plan disrupt the existing 401(k)?
No, but the combined design must be coordinated for §404 deduction limits and nondiscrimination testing.
Is this combined design common?
Yes — 401(k) + Cash Balance DB is a standard advanced-design pattern for high-income closely held businesses. Adding a §401(h) sub-account is the natural extension when retiree healthcare is a planning concern.
Do employees benefit too?
Yes — the §401(h) account can provide retiree medical reimbursement for all eligible participants, subject to nondiscrimination rules.
Next Step for CPAs, Advisors, and Business Owners
If you would like a qualified actuary to evaluate whether a 401(h) arrangement may be appropriate alongside a Defined Benefit or Cash Balance plan for your business, request an introductory consultation. Retirement Actuarial Services LLC has specialized in advanced Defined Benefit plan design and 401(h) integration for closely held businesses and professional practices for decades.
Important Disclosure
This material is provided for educational and informational purposes only and should not be construed as tax, legal, actuarial, investment, accounting, or fiduciary advice. The availability, suitability, contribution limits, deductibility, tax treatment, and reimbursement treatment of any 401(h) arrangement depend on the specific facts and circumstances of the employer, plan sponsor, participant population, plan design, actuarial assumptions, regulatory limits, and applicable IRS and Department of Labor requirements. No strategy described herein is a guarantee of tax savings, contribution levels, reimbursement amounts, investment results, or plan approval. Business owners and advisors should consult qualified tax, legal, actuarial, TPA, and financial professionals before establishing or modifying any qualified retirement plan or retiree medical benefit arrangement. Results vary.
