Employee Benefits for Medical Practices: Health Insurance, HSA, Dependent Care, and Fringe Benefits

A physician-owner’s own health insurance and an employee’s health insurance run through completely different parts of the tax code, and a practice that mixes up the two ends up either missing a deduction the owner is entitled to or setting up a benefit structure that doesn’t actually work the way it’s intended for staff. The self-employed health insurance deduction, the rules for offering group coverage to employees, HSA eligibility tied to a high-deductible health plan, Section 125 cafeteria plans, dependent care assistance, and the ACA’s employer mandate for larger practices are six distinct sets of rules that happen to all live under the umbrella of “employee benefits,” and a practice needs to get each one right independently.

How does the self-employed health insurance deduction work?

A physician who owns their practice, rather than working as a W-2 employee of someone else’s practice, generally can’t just have the practice pay their health insurance premiums and call it a tax-free fringe benefit the way it would work for a regular employee. The mechanism is different, and it runs through the owner’s personal return.

• Under IRC 162(l), a sole proprietor, a partner in a partnership, or a more-than-2% shareholder in an S-corporation can deduct 100% of health insurance premiums paid for themselves, their spouse, and dependents, above the line on their personal Form 1040, regardless of whether they itemize.
• The deduction is capped at the physician’s earned income from the specific trade or business through which the coverage is established; a physician can’t use this deduction to offset unrelated investment income, and the deduction isn’t available at all in a month the physician (or their spouse) was eligible to participate in any subsidized employer health plan, including a spouse’s employer plan.
• For an S-corp shareholder-physician specifically, the mechanics require the S-corp itself to pay or reimburse the premium and include that amount as additional W-2 wages (subject to income tax withholding but not FICA, per longstanding IRS guidance on more-than-2% shareholder health coverage), after which the shareholder claims the 162(l) deduction on their personal return for that same amount. Skipping the step of running it through W-2 wages, just having the shareholder pay premiums personally with no reimbursement through payroll, disqualifies the deduction entirely; this is one of the most common errors on physician S-corp returns.
• A partner in a partnership handles it slightly differently: the partnership either pays the premium directly and reports it as a guaranteed payment, or reimburses the partner, and either way it flows onto the partner’s K-1 as income before the partner claims the personal 162(l) deduction against it. The net effect across all these structures is the same: the premium isn’t simply a tax-free perk to the owner-physician, the way it is for a rank-and-file employee, it’s a deduction the owner has to claim personally against their own earned income.

How does group health coverage for employees work?

Yes, meaningfully different, because a genuine employee (not an owner) gets a much simpler and more favorable result under a different code section entirely.

• Employer-provided health coverage for a bona fide employee is excludable from that employee’s gross income entirely under IRC 106, with no earned-income cap and no requirement to claim anything on a personal return; the premium is simply never taxable income to the employee in the first place.
• The practice deducts the premium cost as an ordinary business expense under IRC 162, the same as any other employee compensation cost.
• A practice offering group coverage needs to watch nondiscrimination rules for self-insured plans under IRC 105(h) if the practice self-funds rather than buying fully-insured coverage; a self-insured plan that favors highly compensated employees (which, in a small practice, often means the owner-physicians) in eligibility or benefits can cause the highly compensated group to lose the tax-free treatment on the discriminatory portion. Fully-insured plans (the far more common structure for small and mid-size practices) aren’t subject to 105(h) nondiscrimination testing, which is one practical reason most practices under a certain size stick with fully-insured group coverage rather than self-funding.
• This is the core asymmetry physician-owners need to understand: the practice’s rank-and-file staff get health coverage completely tax-free with no cap, while the owner-physician (as a more-than-2% shareholder or partner) has to run their own coverage through the earned-income-capped 162(l) mechanism described above. It’s a genuinely less favorable rule for the owner than for the employees, which surprises a lot of physicians the first time it’s explained.

How does HSA eligibility work for an S-corp shareholder?

A Health Savings Account under IRC 223 lets an eligible individual make pre-tax (or above-the-line, for self-employed contributions) contributions to a tax-advantaged account used for qualified medical expenses, but eligibility and the contribution mechanics both have physician-specific wrinkles.

• Eligibility requires enrollment in a qualifying high-deductible health plan (HDHP) and no other disqualifying coverage, including enrollment in Medicare, a general-purpose health FSA, or (notably) a spouse’s non-HDHP family coverage that would cover the HSA-eligible individual too.
• For 2025, HSA contribution limits are $4,300 for self-only HDHP coverage and $8,550 for family coverage, plus a $1,000 catch-up for individuals age 55 and older, all indexed annually.
• A regular W-2 employee can have HSA contributions made through payroll under a Section 125 cafeteria plan, excluding the contribution from both income tax and FICA. A more-than-2% S-corp shareholder-physician cannot use the cafeteria plan route for their own HSA contribution (the same statutory exclusion discussed below for cafeteria plans generally) and instead either contributes personally and deducts the amount above the line on Form 8889, or has the S-corp make the contribution, include it as W-2 wages subject to income tax withholding, and then the shareholder claims the deduction, similar in structure to the health insurance premium mechanic above.
• HSA funds can be used for the physician’s own family medical expenses tax-free when withdrawn for qualified expenses, and unlike an FSA, unused HSA balances roll over indefinitely and remain the individual’s property even after leaving the practice, which makes it a genuinely portable benefit, alongside a solo 401(k) or cash balance plan, in a field where physicians change practices or transition to a new arrangement more often than the general workforce.

How does a Section 125 cafeteria plan work, and who uses it?

A Section 125 cafeteria plan lets employees choose between cash compensation and one or more tax-free qualified benefits (premium payments, health FSA contributions, dependent care assistance), with the elected benefit excluded from income and from FICA wages.

• IRC 125(d)(1) statutorily excludes self-employed individuals from cafeteria plan participation, and IRS guidance extends that exclusion to more-than-2% S-corp shareholders, treating them the same as partners for this purpose even though they’re technically W-2 employees of the corporation for other purposes. This is the same recurring theme as the health insurance and HSA rules above: the owner-physician doesn’t get the simple, pre-tax payroll-deduction route that a genuine employee gets, and needs the alternative mechanism (W-2 inclusion plus personal deduction) instead.
• A dependent care flexible spending account, offered through a cafeteria plan under IRC 129, lets an eligible employee set aside up to $5,000 a year (per household, not per parent) pre-tax for dependent care expenses that allow the employee to work, a meaningful benefit for a two-physician household or any practice employee with young children, but again unavailable to the more-than-2% owner-physician through this specific pre-tax mechanism.
• Working condition fringe benefits under IRC 132(d) are a separate, useful category available to owners and employees alike: items the practice provides that would have been deductible by the individual if they’d paid for it themselves and it’s related to the practice’s business, professional journal subscriptions, certain continuing education, professional liability insurance in some structures. This is a narrower and more specific category than a full cafeteria plan, but unlike the health insurance and HSA rules, it doesn’t carry the same more-than-2%-shareholder exclusion.

When does the ACA employer mandate apply?

The Affordable Care Act’s employer shared responsibility provisions under IRC 4980H impose a potential penalty on “applicable large employers,” those with 50 or more full-time-equivalent employees, that don’t offer minimum essential coverage meeting affordability and minimum value standards to substantially all full-time employees.

• Full-time-equivalent calculation combines actual full-time employees (30+ hours a week) with a pro-rated count of part-time employee hours, using a specific formula (aggregate part-time hours divided by 120 in a month, added to the full-time headcount) under the regulations; a practice with a large part-time or per-diem staff (common for nursing and medical assistant roles) needs to run this calculation carefully rather than just counting heads, since it can push a practice over the 50-FTE threshold even with fewer than 50 people technically full-time.
• Most solo and small group practices are well under this threshold and don’t need to think about it at all, but a multi-location group or a practice that’s grown through acquisition (combining staff counts across commonly controlled entities under the ACA’s aggregation rules, which mirror the controlled-group rules elsewhere in the tax code) can cross 50 FTEs without any single owner realizing it happened, particularly across multiple affiliated PCs under common ownership.
• Once a practice is an applicable large employer, failing to offer affordable, minimum-value coverage to substantially all full-time employees and their dependents can trigger a per-employee-per-month penalty if even one full-time employee receives a premium tax credit on the ACA marketplace, calculated and assessed by the IRS based on marketplace data, not something the practice self-reports in the first instance, which is why growing groups should run the FTE calculation proactively rather than waiting for an IRS notice.

What should a practice actually set up correctly here?

Run the S-corp shareholder health insurance and HSA contributions through W-2 wages every single payroll cycle, not as a year-end adjustment, since the IRS guidance requires the W-2 inclusion step and retroactively fixing it at year-end is far messier than doing it correctly each pay period. Confirm which benefits the more-than-2% owner-physician is statutorily excluded from (cafeteria plan participation, tax-free HSA and health insurance treatment through payroll) before assuming the practice’s benefit plan documents apply the same way to owners and staff. And if the practice is growing toward multiple locations or has grown through acquisition, run the ACA full-time-equivalent count across all commonly controlled entities at least annually.

Related guides:

• Medical practice entity structure: PC, PLLC, and S-corp election, the ownership structure that drives the more-than-2%-shareholder rules throughout this guide
• Retirement plans for physicians: defined benefit, 401(k), and cash balance plans, the other major benefit category alongside health coverage
• Physician compensation models: RVU-based, salary plus bonus, and K-1 income, for how the W-2 wage base referenced here gets set
• Tax deductions for physicians: equipment, CME, and malpractice insurance, the broader deduction picture this benefits guide sits within

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.