S-Corp Owner Health Insurance
If you own more than 2% of an S corporation, your health insurance premiums can be deductible on your personal return and kept out of payroll tax, but only if the premiums run through the company and onto your W-2. On $24,000 of premiums at a 32% bracket, that is about $7,680 of federal income tax, with no Social Security or Medicare tax added. Paid the wrong way, the same premiums can produce no deduction at all.
Reviewed by Ebot Mbi, CPA, EA · Last reviewed October 9, 2026
Who it fits
- S-corporation owners (more than 2%) who buy their own health coverage
- Owner-employees whose family coverage costs $15,000 or more a year
- Owners who currently pay premiums from a personal account and deduct nothing
- Spouses or children of an owner who work in the business, since family attribution makes them 2% shareholders too
Who it's not for
- Owners who could join a subsidized employer plan through their own or their spouse's job for that month
- S corporations that pay the owner little or no W-2 wage, because the deduction cannot exceed earned income from the business
- Sole proprietors and partners, who use a related but different route
How it works
The tax law treats a more-than-2% S-corporation shareholder like a partner for fringe benefits. That means the company cannot give you tax-free health insurance the way it can for a rank-and-file employee. Instead, the premiums become taxable wages, and you take them back off as a deduction on your Form 1040.
The sequence matters. The S corporation either pays the insurer directly or reimburses you for premiums you paid. The company deducts the cost as wages. The amount goes into Box 1 of your W-2 as taxable wages, but it stays out of Boxes 3 and 5, so no Social Security or Medicare tax applies. You then claim the self-employed health insurance deduction for the same amount.
The net effect: the company's deduction and your extra Box 1 wages cancel out, and the self-employed health insurance deduction lowers your adjusted gross income. It is an above-the-line deduction, so you get it whether or not you itemize.
If the premiums are not reported on the W-2, the IRS position is that the plan was not established by the business, and the deduction can be lost. This is the single most common error we see on S-corporation returns.
The same treatment covers a policy in your own name, as long as the S corporation pays or reimburses it during the year. Coverage for your spouse and dependents qualifies too.
Illustrative example
Illustrative: a married S-corporation owner in the 32% bracket pays $24,000 a year for family health coverage. Salary from the S corporation is $150,000, below the $184,500 Social Security wage base.
- S corporation pays $24,000 of premiums and deducts it: pass-through income drops by $24,000
- W-2 Box 1 wages rise from $150,000 to $174,000: taxable income rises by $24,000
- Net so far: -$24,000 + $24,000 = $0
- Self-employed health insurance deduction on Form 1040: -$24,000 of AGI
- Federal income tax saved: $24,000 x 32% = $7,680
- Payroll tax on the $24,000: $0, versus $24,000 x 15.3% = $3,672 had it been paid as extra salary
About $7,680 of federal income tax saved each year, with $3,672 of payroll tax avoided compared with simply raising salary to cover the premiums.
The rules
| Rule | Citation |
|---|---|
| A more-than-2% S-corporation shareholder is treated as a partner for fringe benefits, including family members under attribution rules. | IRC §1372 |
| Premiums paid by the S corporation for a 2% shareholder are wages in Box 1, and the shareholder may deduct them as self-employed health insurance. | IRS Notice 2008-1; Rev. Rul. 91-26 |
| The deduction is limited to earned income from the business that established the plan and is not allowed for any month you were eligible for a subsidized employer plan. | IRC §162(l)(2) |
| Payments under an employer plan for medical care are excluded from Social Security and Medicare wages. | IRC §3121(a)(2)(B) |
Watch-outs
- Premiums must appear in W-2 Box 1 by year-end payroll. Fixing it after W-2s are filed means corrected forms.
- Eligibility is tested month by month. A month when your spouse's employer plan was available to you is not deductible, even if you declined it.
- Your W-2 wage must be reasonable for the work you do. Low salary limits this deduction and invites a reasonable compensation challenge.
- Premiums paid from a personal account with no company reimbursement generally fail the plan requirement.
What we do
We set up the payroll reporting so the premiums land in Box 1 and stay out of Boxes 3 and 5, confirm month-by-month eligibility, and claim the deduction on your return. We also review your salary level so the deduction is fully usable and defensible.
Questions
Does this work for a Marketplace (ACA) policy?
It can. The S corporation must pay or reimburse the premiums and report them on your W-2. If you also receive a premium tax credit, the two calculations interact, and we work them together so neither is overstated.
Can my spouse's premiums be included?
Yes. Coverage for your spouse and dependents counts toward the deduction, subject to the same earned-income and eligibility limits.
What if we forgot to put the premiums on my W-2 last year?
It is often correctable if caught early through corrected W-2 and payroll filings. Talk to us before you file the personal return so the two match.