How to Set Up a 401(h) Account [Step-by-Step]

By now you may have heard the pitch: a 401(h) account lets your business make tax-deductible contributions to a medical fund, lets the money grow tax-free, and lets you spend it tax-free on healthcare in retirement. It's one of the most powerful — and most overlooked — tools available to business owners.

But knowing an account exists and actually getting one set up are two different things. You can't open a 401(h) the way you'd open an IRA at a brokerage firm. It must be built into a qualified retirement plan, designed by professionals, and documented properly. The good news? The process is straightforward when you know the steps.

Here's the roadmap, from first phone call to funded account.

Everything starts with a third-party administrator (TPA) — ideally one with genuine 401(h) experience, since many administrators have never designed one. The TPA is the architect of your plan: they handle the design work, the annual compliance, and the coordination with the actuary who certifies your contribution levels.

Your first real deliverable is an illustration. Based on a short list of facts — your age, your income, your business structure, how many employees you have, and how much you'd like to contribute — the administrator models what your plan could look like. A good illustration shows you:

• How much could go into the retirement plan each year,
• How much could ride along in the 401(h) medical account,
• What the combined tax deduction would look like, and
• What the projected accounts could grow to by retirement.

This step costs you little more than a conversation, and it answers the threshold question before you spend another minute: is this worth doing in my situation? For a profitable business owner in their 40s, 50s, or early 60s, the answer is very often yes — but the illustration puts real numbers on it.

A 401(h) must be attached to a host retirement plan, and you have two choices: a defined benefit plan (which includes the popular cash balance design) or a money purchase plan. This is the single most consequential design decision, because the size of your 401(h) contributions is tied to the size of the retirement contributions flowing into the host.

Here's the plain-English comparison:

The money purchase plan contributes a fixed percentage of pay each year. It's simpler and cheaper to run — no actuary is required once the plan is established with a frozen benefit structure — but the contribution levels are modest, which means the medical account funding that rides along is modest too. It tends to make sense for owners who want a smaller, steadier 401(h) with minimal complexity, or who already have significant retirement assets and mainly want the medical account itself.

The defined benefit plan promises a specific retirement benefit, and an actuary calculates the (often very large) contributions needed to fund it. For an owner in their 50s, six-figure annual retirement contributions are common — and larger retirement contributions support proportionally larger 401(h) contributions. If your goal is to maximize both the retirement plan and the medical account, the defined benefit route is almost always the answer.

Your administrator will typically illustrate both paths side by side. The right choice comes down to your age, your income stability, how many years you plan to keep contributing, and how much administrative machinery you're comfortable with.

Before anything gets signed, bring your CPA into the room. This step matters for three reasons.

First, the tax math needs to be verified against your actual return. The illustration shows the deduction. Your CPA shows what that deduction is worth given your entity type, your bracket, your state taxes, and everything else on your return. A $150,000 combined contribution means something very different to an S corporation owner in a high bracket than to someone with large loss carryforwards.

Second, the structure needs to fit your business. Your CPA will confirm details the administrator relies on: your compensation levels, whether related businesses need to be considered together, how the contributions will flow through payroll and the corporate books, and whether your salary level makes sense alongside the benefits package being created.

Third, deadlines and cash flow need to be mapped. Retirement plan contributions have specific timing rules tied to your tax filing, and defined benefit plans come with required minimum contributions each year. Your CPA and administrator together should confirm that the funding commitment fits comfortably within your projected cash flow — not just this year, but over the expected life of the plan.

When the CPA signs off, you'll have three professionals aligned: the administrator on design, the actuary on the numbers, and the CPA on the tax picture. That alignment is what separates a durable plan from a future headache.

With the structure confirmed, your administrator prepares the formal plan documents. This is where the plan becomes real. The document package typically includes:

• The plan document itself, which establishes the retirement plan and the 401(h) medical benefit account within it, spells out who is covered, defines the benefits, and contains the specific provisions the medical account requires — including language keeping the medical funds strictly separate from the retirement funds and dedicated solely to medical benefits.
• An adoption agreement and corporate resolutions, formally adopted by your business.
• A summary plan description, the plain-language explanation provided to participants.

Read the highlights, ask questions, and then sign. Timing matters here: the plan generally needs to be established before your business's tax filing deadline (including extensions) for the year you want the first deduction, and earlier is always better — it gives the actuary and administrator room to do the first year's work properly. Many owners set up their plan in the fall so everything is in place well before year-end.

One reassurance for the nervous: signing the documents doesn't lock you in forever. Plans can be amended as your business evolves, and they can eventually be frozen or terminated through an orderly process. You're making a multi-year commitment, not an irreversible one — but it should be entered with a genuine intention to fund it for several years.

Now the money moves. Your administrator will guide you through opening the plan's investment account — typically a trust account at a brokerage or custodian that accepts qualified plan assets. Two practical notes:

The medical account must be tracked separately. The 401(h) money and the retirement money live under the same plan, but they can never be mingled in the recordkeeping. Depending on the custodian, that may mean separate accounts or separate accounting within one account. Your administrator handles the bookkeeping structure. Your job is simply to follow their account-opening instructions.

Fund on the schedule the actuary sets. Each year, the actuary certifies the contribution range for the retirement plan and the permitted amount for the 401(h). Your business wires the contributions — designating, at the time of each contribution, how much is for retirement benefits and how much is for the medical account. That designation matters, so follow the administrator's contribution instructions to the letter.

Once funded, the assets are invested according to the strategy you choose with your advisor. Defined benefit plans usually favor steadier, more conservative allocations because the actuarial math assumes a modest return; your administrator can explain how investment performance interacts with future contribution requirements.

From there, the annual rhythm is simple: the administrator collects your census and financial data each year, the actuary certifies the numbers, the required filings get made, and you make your contributions. Your ongoing time commitment is measured in hours per year, not days.

Setting up a 401(h) account is a sequence, not a leap: run an illustration, pick the right host plan, verify everything with your CPA, sign the documents, and fund the account. Each step exists for a reason, and with an experienced administrator leading the process, the whole journey from first conversation to funded plan typically takes a matter of weeks.

What you get at the end is something genuinely rare — a dedicated, tax-free fund for what will likely be one of the largest expenses of your retirement, built alongside a retirement plan that may be generating six-figure deductions in its own right. Most business owners will never set one up, not because it wouldn't benefit them, but because they never learned the account existed or assumed the process was too complicated.

It isn't. The heavy lifting belongs to the professionals. Your part is deciding to start — and now you know exactly what the road looks like. If you're a profitable business owner with a decade or more until retirement, requesting that first illustration may be the most valuable fifteen minutes you spend this year.