S-Corp Owner Health Insurance: Get It on the W-2 by December 31
For a consulting firm owner taxed as an S corporation, health insurance premiums have to run through the company and onto the owner's W-2 for the above-the-line deduction. The year-end payroll is the deadline.
If you own more than 2% of an S corporation, your health insurance premiums count for the self-employed health insurance deduction only when the company pays them (or reimburses you) and adds them to your W-2 wages. For 2026, that has to be done in the 2026 payroll, and the W-2 is due February 1, 2027. If it is left until the return is prepared, the fix is harder.
How the Rule Works
The IRS treats a more-than-2% S-corp shareholder like a partner for fringe benefits. Premiums the company pays for that owner are deductible by the S corporation and are “reportable as wages on the shareholder-employee’s Form W-2, subject to income tax withholding” (IRS, S Corporation Compensation and Medical Insurance Issues).
They are wages for income tax, but not for payroll taxes. When the premiums are paid under a plan for all employees or a class of employees, they are not subject to Social Security, Medicare or FUTA tax. On the W-2 they go in box 1 but not boxes 3 and 5.
The owner then takes an above-the-line deduction for the premiums on the personal return, which offsets the added box 1 wages. That deduction requires that the coverage was established by the S corporation. Under Notice 2008-1, as the IRS summarizes it, “the health insurance premiums must ultimately be paid by the S corporation and must be reported as taxable compensation in the shareholder’s W-2.”
Conditions and Exceptions
- Subsidized coverage elsewhere. No deduction is allowed for any month you are eligible to participate in a subsidized health plan maintained by an employer of yours or of your spouse (26 U.S.C. §162(l)(2)(B)). Eligibility is enough; you do not have to enroll.
- Earned income limit. The deduction cannot exceed earned income from the business the plan was established under (§162(l)(2)(A)). For an S-corp shareholder, that is W-2 wages from the S corporation (§162(l)(5)). An owner taking little or no salary may have little or no room for the deduction.
- Who is covered. The deduction covers insurance for you, your spouse, your dependents, and a child who has not turned 27 by year-end (§162(l)(1)).
- Reasonable compensation still applies. An S corporation must pay a shareholder-employee reasonable compensation for services before making non-wage distributions (IRS, S Corporation Compensation and Medical Insurance Issues). Adding premiums to box 1 does not replace that.
What to Do Before the Last 2026 Payroll
- Confirm who pays. If the policy is in your name and you pay it personally, set up reimbursement by the company for the year’s premiums.
- Total the year’s premiums. Include every month the company paid or reimbursed.
- Tell the payroll provider. The total goes into box 1 wages on the final payroll. Many providers have a set code for 2% shareholder health insurance.
- Check the other conditions. Look for any month in which you or your spouse could join a subsidized employer plan.
A Hypothetical, for the Mechanics Only
Suppose an owner of a hypothetical consulting S corporation earns $90,000 in salary, and the company reimburses $12,000 of health insurance premiums during the year. The W-2 shows $102,000 in box 1 and $90,000 in boxes 3 and 5. On the personal return, the owner may take a $12,000 self-employed health insurance deduction, provided the other conditions are met. This example shows the mechanics only; it does not describe anyone’s actual result.
Sources
- IRS, S Corporation Compensation and Medical Insurance Issues: https://www.irs.gov/businesses/small-businesses-self-employed/s-corporation-compensation-and-medical-insurance-issues
- 26 U.S.C. §162(l): https://www.law.cornell.edu/uscode/text/26/162
- IRS, General Instructions for Forms W-2 and W-3 (2026): https://www.irs.gov/instructions/iw2w3
Educational content only. Not tax, legal, or investment advice. Tax strategies depend on your specific facts and circumstances. Consult a qualified professional regarding your situation. Past results do not guarantee future outcomes.
Common questions
Where do an S-corp owner's health insurance premiums go on the W-2?
For a more-than-2% shareholder-employee, the IRS says premiums paid by the S corporation are reportable as wages in box 1 of the W-2, subject to income tax withholding. When they are paid under a plan for all employees or a class of employees, they are not subject to Social Security, Medicare or FUTA tax, so they are not added to boxes 3 and 5.
Why does it matter whether the S corporation pays the premiums?
Under Notice 2008-1, as summarized by the IRS, the premiums must ultimately be paid by the S corporation and reported as taxable compensation on the shareholder's W-2 for the shareholder to take the self-employed health insurance deduction. A policy the owner pays personally, with no reimbursement by the company, may not meet that condition.
When is the deadline?
The W-2 for 2026 is due to employees and to the Social Security Administration by February 1, 2027. In practice the premiums need to be paid or reimbursed by the company and added to wages in the 2026 payroll, so the last payroll of the year is the working deadline.
Can every S-corp owner take the deduction?
Not in every month. Section 162(l) denies the deduction for any month the owner is eligible to participate in a subsidized health plan maintained by an employer of the owner or the owner's spouse, and limits the deduction to earned income from the business, which for an S-corp shareholder means W-2 wages from the S corporation.
Check the health insurance setup before the last payroll of the year.
Whether the premiums are paid by the company, reimbursed, and on the W-2 is a year-end payroll item, not a return-prep item. We review it with the owner's salary before the final payroll runs. A 15-minute intake scopes your firm.
By Askia Roberts, CPA · GA License #CPA038784 · RTW Advisors