Small Business Health Insurance: Self-Employed Health Insurance Deduction, HRAs, and the Section 105(h) Strategy

Health care costs are one of the largest expense categories for small business owners and their families. Unlike W-2 employees who often receive employer-paid coverage tax-free, self-employed and small business owners must navigate a complex web of deduction structures to convert healthcare costs from after-tax personal expenses into pre-tax business deductions. Done correctly, the savings can amount to 30-50% of healthcare expenses.

Self-Employed Health Insurance Deduction

Under §162(l), self-employed taxpayers can deduct 100% of health insurance premiums paid for themselves, their spouses, and dependents — as an above-the-line deduction (reducing AGI directly, not requiring itemization). The deduction includes:

• Health insurance premiums (medical, dental, vision).

• Long-term care insurance premiums (subject to age-based limits).

• Coverage for spouse and dependents.

Eligibility Requirements

• The taxpayer must have net self-employment income.

• The deduction cannot exceed net SE income.

• The taxpayer must NOT be eligible for employer-subsidized coverage (including the spouse's employer).

• The plan must be established under the taxpayer's business name.

Limitations

The deduction does NOT reduce self-employment tax (only reduces income tax). For an S-corp owner with $100,000 net income paying $20,000 in family health insurance:

• Income tax savings at 24% federal: $4,800.

• SE tax savings: $0.

The deduction is also limited if the taxpayer or spouse becomes eligible for any employer-subsidized health plan, even partway through the year.

S-Corporation Shareholder Health Insurance

For S-corporation more-than-2% shareholders (which includes nearly all S-corp owners), health insurance premiums paid by the corporation are subject to special rules:

1. The corporation pays the premiums (or reimburses the shareholder for premiums paid).

2. The premiums are added to the shareholder's W-2 wages (in Box 1 only, not Boxes 3 and 5 — meaning income tax applies but NOT FICA tax).

3. The shareholder claims the §162(l) self-employed health insurance deduction on their personal return, fully offsetting the W-2 inclusion.

The net result: the corporation deducts the premiums, the shareholder receives the benefit tax-free for FICA purposes, and the income tax inclusion is offset by the §162(l) deduction. This produces approximately a 7.65% effective payroll tax savings on the premium amount.

Health Reimbursement Arrangements (HRAs)

HRAs are employer-funded plans that reimburse employees (and their dependents) for qualified medical expenses on a tax-free basis. Several variants exist:

Qualified Small Employer HRA (QSEHRA)

For employers with fewer than 50 employees who do not offer group health insurance:

• 2025 maximum reimbursement: $6,350 self-only / $12,800 family.

• Employee uses funds to purchase individual health insurance and pay qualified medical expenses.

• Reimbursement is tax-free to the employee, deductible to the employer.

• Cannot be combined with group health plan coverage.

Individual Coverage HRA (ICHRA)

For employers of any size:

• No annual contribution limit.

• Employer can offer ICHRA in lieu of (or in addition to) group health coverage.

• Different employee classes can receive different ICHRA amounts.

• Employee uses funds to purchase ACA marketplace or individual coverage and pay medical expenses.

Excepted Benefit HRA (EBHRA)

For employers offering group health insurance:

• 2025 maximum: $2,150 per employee.

• Used for excepted benefits like dental, vision, or copays.

• Cannot be used for primary medical insurance premiums.

Section 105(h) Self-Insured Medical Reimbursement Plans

For sole proprietors and certain LLC structures, a Section 105(h) plan provides one of the most powerful health-related tax strategies:

1. The business establishes a written self-insured medical reimbursement plan covering the employee-spouse (and the spouse's family, including the proprietor).

2. The plan reimburses qualified medical expenses incurred by covered family members.

3. Reimbursements are deductible business expenses to the proprietor and tax-free to the recipient family member.

This structure converts family medical expenses (otherwise paid with after-tax dollars and limited to the 7.5% AGI floor for itemized deductions) into 100% deductible business expenses — reducing both income tax AND self-employment tax.

Critical Limitation: NOT Available to S-Corps

Section 105(h) plans cannot be used by S-corporations to cover more-than-2% shareholders or their family members. The strategy works only for sole proprietorships and certain LLC structures.

Documentation Requirements

• Written plan document.

• Spouse must be a bona fide employee receiving reasonable compensation for actual services.

• Plan must be communicated to the employee.

• Reimbursements must be documented with receipts.

Health Savings Accounts (HSAs)

For taxpayers covered by qualifying high-deductible health plans, HSAs provide the only triple-tax-advantaged structure in the U.S. tax code:

• Tax-deductible contributions.

• Tax-free growth.

• Tax-free withdrawals for qualified medical expenses.

2025 contribution limits: $4,300 self-only / $8,550 family. Catch-up of $1,000 at age 55+.

For S-corp owner-employees, HSA contributions through payroll are excluded from W-2 wages AND from FICA — the only category where this dual exclusion applies. This makes employer HSA contributions to S-corp owners particularly tax-efficient.

Long-Term Care Insurance

Long-term care insurance premiums are deductible as medical expenses, with age-based limits (2025):

• Age 41-50: $880.

• Age 51-60: $1,760.

• Age 61-70: $4,710.

• Age 71+: $5,880.

Self-employed taxpayers can include qualifying LTC premiums in the self-employed health insurance deduction. S-corp shareholders include LTC premiums in W-2 wages, then deduct via §162(l).

Medical Expense Itemized Deduction

For taxpayers who itemize, medical expenses exceeding 7.5% of AGI are deductible as itemized deductions on Schedule A. With the increased standard deduction post-TCJA, fewer taxpayers reach the threshold — but for high-medical-expense years, the deduction remains valuable.

Qualifying expenses include:

• Out-of-pocket medical, dental, vision, prescription expenses.

• Health insurance premiums (NOT already deducted via §162(l)).

• Long-term care expenses and insurance premiums (subject to age limits).

• Mileage to medical appointments (24 cents per mile for 2025).

• Required home modifications for medical reasons.

• Qualified medical equipment (CPAP machines, hearing aids, etc.).

Cafeteria Plans (Section 125)

For C-corp employers (and to a limited extent S-corps for non-shareholder employees), Section 125 cafeteria plans allow employees to elect pre-tax salary reductions for:

• Health insurance premiums.

• Dental and vision premiums.

• Healthcare Flexible Spending Account (FSA) contributions.

• Dependent Care FSA contributions.

For S-corp more-than-2% shareholders, cafeteria plan elections are NOT effective — the shareholder cannot reduce W-2 wages on a pre-tax basis through Section 125.

The Premium Tax Credit Coordination

For self-employed taxpayers purchasing health insurance through the ACA marketplace, the §162(l) self-employed health insurance deduction interacts with the Premium Tax Credit (PTC) under §36B in complex ways. The deduction reduces AGI, which affects PTC eligibility and amount, which affects the deductible premium, in a circular calculation.

The IRS provides specific worksheets to handle this calculation. Many tax software packages handle the iteration automatically.

Common Mistakes

• Claiming the self-employed health insurance deduction when the taxpayer or spouse was eligible for employer-subsidized coverage.

• Setting up a Section 105(h) plan in an S-corp (statutorily disallowed).

• S-corp shareholders failing to add health insurance to W-2 wages (loses §162(l) deductibility).

• Pre-tax salary reduction for S-corp shareholder health insurance (not allowed under §125).

• Missing HSA eligibility opportunities by maintaining disqualifying coverage.

• Failing to maintain written plan documents for HRAs and §105(h) plans.

• Including spouse on payroll without bona fide services and reasonable compensation.

Bottom Line

Health care deduction strategy for small business owners involves multiple Code provisions, entity-specific rules, and careful coordination between business and personal returns. The right structure can convert tens of thousands of dollars of family healthcare costs from non-deductible personal expenses into fully deductible business expenses. For business owners spending $20,000+ annually on family health insurance and medical expenses, professional CPA guidance on health benefit structuring typically pays for itself many times over.