Health insurance for S-corp owners: the deduction with a secret handshake
The short answer
S-corp owners (holding more than 2%) can deduct health insurance — but only through a specific choreography: the company pays or reimburses the premiums, the amount is added to Box 1 of your W-2 (exempt from Social Security and Medicare), and you take the above-the-line self-employed health insurance deduction personally. Pay premiums out of pocket with no W-2 reporting and the deduction is generally forfeited — the single most common S-corp payroll error we see.
The choreography, in order
- Company pays the premium (or reimburses you with documentation — a one-owner accountable-plan cousin).
- Payroll adds it to Box 1 as wages, coded so it escapes FICA. Tell your payroll provider before December, not at W-2 time.
- You deduct it above the line on your 1040 — no itemizing needed, subject to the earned-income limit from the S-corp.
- Extend the pattern to HSA contributions and, with care, certain family coverage.
Where it goes wrong
- Premiums paid personally all year, no W-2 entry, deduction lost
- Payroll provider never told, W-2s reissued in February (or worse, not)
- Premiums run as a straight business deduction with no shareholder reporting — a mismatch exams catch mechanically
Frequently asked questions
How does a >2% S-corp shareholder deduct health insurance?
The premiums must run through the company: paid or reimbursed by the S-corp, added to Box 1 of your W-2 (not subject to FICA), then deducted above-the-line on your personal return as self-employed health insurance.
What if I just pay premiums personally and skip the W-2 step?
Then the above-the-line deduction is generally lost — the IRS ties it to the W-2 reporting. This is the most common error we clean up on new S-corp clients' prior returns.
Can the S-corp cover my spouse and family?
Family premiums under the shareholder's policy follow the same W-2 route. A spouse who is a genuine employee opens further options, but the standard path runs through your own W-2.
Do HSAs work with this?
Yes — S-corp contributions to a >2% shareholder's HSA follow a similar pattern: through the W-2, then deducted personally. The mechanics matter more than the concept.
Is your W-2 doing this correctly?
We'll review one payroll report and last year's W-2 and tell you in minutes whether the deduction is intact — and fix the setup if it isn't.
Book a free consultation