Your family spent $14,000 on health insurance premiums last year, plus another $4,000 on deductibles, dental work, and prescriptions — and you deducted almost none of it against your self-employment tax. Meanwhile, a business owner across town with the same income and the same medical bills deducted every dollar, income tax and self-employment tax alike. The difference? Her spouse is on the payroll, and her business sponsors a one-employee health reimbursement arrangement under Section 105.
If you run a sole proprietorship with no employees and your spouse genuinely works in the business, this is one of the most powerful — and most misunderstood — tax strategies available to a microbusiness. Here is how it works, who qualifies, and the traps that can blow it up.
How a Section 105 HRA Works
A health reimbursement arrangement (HRA) is an employer-funded plan that reimburses employees for medical care expenses defined in Section 213(d): health insurance premiums, deductibles, copays, dental and vision care, prescriptions, and similar costs. Three features make it unusually valuable:
- The business deducts the reimbursements as an ordinary business expense, which reduces both income tax and self-employment tax.
- The employee excludes the reimbursements from income under Sections 105(b) and 106. No income tax, no payroll tax on the benefit.
- Unused amounts can carry forward to future years, so there is no use-it-or-lose-it pressure like a flexible spending account.
The IRS blessed the basic mechanics in Revenue Ruling 2002-41: as long as the arrangement is funded solely by the employer, reimburses only substantiated medical expenses, and gives the employee no right to cash out, the coverage and reimbursements stay out of the employee's gross income.
So where does the spouse come in? You, the owner, cannot reimburse yourself — a sole proprietor is not an employee of their own business. But an HRA covers the employee's spouse and dependents too. Hire your spouse as a legitimate W-2 employee, and the HRA can reimburse the medical expenses of your entire family: your spouse the employee, you as the employee's spouse, and your dependents.
Why the One-Employee HRA Survives the Affordable Care Act
You may have heard that the Affordable Care Act effectively killed standalone HRAs. That is true for most employers — but not for yours.
The ACA's market reforms (the ban on annual dollar limits, the preventive-care mandate, and the rest) do not apply to a group health plan that covers fewer than two participants who are current employees on the first day of the plan year. The statute says so directly, and IRS Notice 2013-54 confirms that an HRA covering only a single employee-participant is exempt.
This is the entire legal foundation of the spouse-only Section 105 plan: one eligible employee, one participant, no ACA market-reform problem. The moment you hire a second eligible employee, that exemption evaporates — more on that trap below.
Who Qualifies (and Who Decidedly Does Not)
Entity type decides everything here. The strategy works beautifully for some structures and fails completely for others.
Sole proprietorships: the classic fit
A sole proprietor filing Schedule C who hires a spouse as a W-2 employee is the textbook case. The business gets an EIN, runs payroll, issues a W-2, and adopts a written HRA covering its one employee. The reimbursements are deductible on Schedule C, cutting both income tax and the 15.3% self-employment tax.
Bonus payroll-tax quirk: wages paid to someone working for their spouse are subject to income tax withholding and Social Security/Medicare taxes, but are exempt from federal unemployment (FUTA) tax. That is a small but real savings versus hiring a non-spouse.
C corporations: works too
A C corporation is a separate legal entity, so its owner is already an employee who can participate in the company HRA directly. A spouse on the corporate payroll can also be a covered employee. Either way, reimbursements are deductible by the corporation and excluded by the employee.
S corporations: does not work
This is the trap that catches the most people. A more-than-2% S corporation shareholder is not treated as an employee for Section 105 purposes and cannot participate in the company's HRA on a tax-favored basis. Worse, the stock-attribution rules treat the shareholder's spouse (along with children, parents, and grandparents) as owning the same stock — so the spouse of a more-than-2% shareholder is disqualified too. An S corporation owner who sets up a spouse HRA gets taxable reimbursements, which defeats the whole purpose.
Partnerships and LLCs taxed as partnerships: generally does not work
Partners are self-employed individuals, not employees, so they cannot participate in the partnership's HRA. The same attribution logic that sinks S corporations generally sinks the partner's spouse as well. If you operate in one of these forms and want this strategy, talk to your CPA about whether a different structure makes sense — but never restructure for this reason alone.
The Math: What Is It Actually Worth?
Consider a sole proprietor in the 22% federal bracket paying $12,000 a year in family health insurance premiums plus $4,000 in out-of-pocket medical, dental, and vision costs — $16,000 total.
Without the HRA: the premiums may be deductible above the line under Section 162(l), which saves income tax but not a penny of self-employment tax, and only to the extent of net self-employment income. The $4,000 in out-of-pocket costs is deductible only as an itemized medical expense above 7.5% of adjusted gross income — which, for most families, means not at all.
With the HRA: the full $16,000 is an ordinary business deduction. At a combined marginal rate of roughly 37% (22% income tax plus 15.3% self-employment tax), that is about $5,900 in annual tax savings — before counting state income tax.
The offsetting cost is the payroll tax on the spouse's wages. If the spouse earns $10,000 in W-2 wages for genuine part-time work, the combined employer/employee payroll tax is about $1,530, and the employer's half is itself deductible. The HRA savings typically dwarf that cost several times over — but run your own numbers, because the strategy only pays if the family's medical spending is large enough to justify the payroll and paperwork overhead.
Making the Employment Bona Fide
The IRS is entitled to disregard employment that exists only on paper, and a spouse on the payroll with no real duties is an audit magnet. Every element of genuine employment must be present:
- Real work. Your spouse must actually perform services the business needs — bookkeeping, invoicing, customer support, marketing, scheduling. Document the role in a job description.
- Reasonable pay. Compensation must match what you would pay an unrelated person for comparable work in your area. Paying a spouse $60,000 for two hours of filing a month will not survive scrutiny; an hourly rate with timesheets is the gold standard.
- Actual payroll. Get an EIN, withhold income and FICA taxes, file quarterly Forms 941, issue a W-2, and follow state withholding and workers' comp rules. The wages are a business deduction, and the paperwork is what proves the job is real.
- Direction and control. The owner-spouse should make management decisions while the employee-spouse works under their direction — the same relationship you would have with any hire.
Timesheets are the single most persuasive piece of evidence. A contemporaneous log of hours and tasks turns "my spouse helps out" into documented employment.
Setting Up the HRA Itself
Beyond the employment relationship, the plan has its own formalities. Skipping them converts tax-free reimbursements into taxable wages.
- Adopt a written plan document before reimbursing anything. It should name the eligible employee(s), the maximum annual reimbursement, the expenses covered, substantiation requirements, and carryforward terms. Templates exist, but have a benefits-savvy CPA or attorney review yours.
- Fund it solely from the employer. The spouse cannot contribute via salary reduction or pay premiums through the plan with pre-tax wages. Every dollar must come from the business.
- Substantiate every expense. Each reimbursement needs proof — an invoice or explanation of benefits showing the date, provider, service, and amount. Reimburse from the business account to keep a clean paper trail, and never reimburse an expense twice.
- Reimburse only Section 213(d) expenses. Premiums for individual or family coverage, deductibles, copays, dental, vision, orthodontia, prescriptions, and similar costs qualify. Cosmetic procedures, general wellness club dues, and expenses incurred before the plan existed do not.
- No double-dipping. Expenses reimbursed through the HRA cannot also be claimed as an itemized medical deduction or run through the self-employed health insurance deduction. Pick one tax benefit per dollar.
Unlike its capped cousin, the QSEHRA — limited to $6,450 for self-only and $13,100 for family coverage in 2026 — a one-employee Section 105 HRA has no statutory dollar cap. You set the maximum in the plan document. Set it at a level your medical spending will plausibly reach, since an absurdly high cap with token reimbursements looks like window dressing.
Five Traps That Destroy the Strategy
1. Hiring a second employee. The ACA exemption requires fewer than two participating current employees. The nondiscrimination rules of Section 105(h) also require that a plan not favor highly compensated employees — with one employee there is nobody to discriminate against, but adding a receptionist or assistant means covering them too (or redesigning the plan). Before any hire, revisit the HRA with your advisor.
2. Marketplace subsidies. If your family buys coverage on the health insurance exchange and claims the premium tax credit, coordinating the HRA gets tricky: premiums reimbursed tax-free through the HRA generally cannot also generate a credit. Model both paths before committing.
3. Medicare and HSA interactions. HRA coverage can affect health savings account eligibility and Medicare secondary-payer questions. If anyone in the family contributes to an HSA, get specific guidance — an HRA that reimburses broadly will generally disqualify HSA contributions.
4. Unreasonable compensation. The wages must stand on their own as pay for work performed. If the "salary" is really just a conduit for the HRA benefit, the IRS can recharacterize the whole arrangement.
5. Sloppy substantiation. Missing receipts, reimbursements paid in round-number cash, expenses predating the plan document — each one hands an examiner a reason to treat reimbursements as disguised wages. The discipline of documenting every claim is the price of the exclusion.
Keep the Paper Trail That Protects the Deduction
Notice how much of this strategy is recordkeeping: timesheets proving the job is real, a written plan document, substantiated claims, separate business-account transfers, payroll filings. That is not a coincidence — the tax savings go to the business owner who can prove every element, and the proof lives in the books.
Track the moving parts the way you would any compliance-sensitive workflow: wages as a payroll expense, HRA reimbursements in their own ledger account (never commingled with wages), and each claim filed with its receipt. If you use plain-text accounting, each reimbursement is a dated, reviewable transaction — exactly the kind of contemporaneous record that answers an examiner's questions before they are asked. The documentation shows how to structure accounts for payroll and benefits, and the dashboard views make it easy to confirm the year's reimbursements match the plan maximum.
Simplify Your Financial Management
As you put your spouse on payroll and start reimbursing medical costs through a Section 105 HRA, maintaining clear financial records is essential — the deduction is only as strong as the books behind it. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
