The short answer
If you own more than 2% of an S-corporation, your health insurance is handled differently than for a regular employee. To deduct your premiums, they generally must be paid or reimbursed by the S-corp and included in your W-2 wages, then deducted on your personal return as a self-employed health insurance deduction. Skipping the W-2 step is the classic mistake that costs S-corp owners the deduction.
So the rule isn't complicated, but the mechanics have to be right, or you lose a valuable tax break.
How the 2%-shareholder rule works
For a more-than-2% shareholder, the S-corp pays or reimburses your health premiums and reports that amount as wages on your W-2 (subject to income tax but generally not Social Security and Medicare tax). You then claim the self-employed health insurance deduction on your personal return, which offsets that income. Done correctly, the premium ends up effectively deductible; done incorrectly, it doesn't.
This is a payroll-and-reporting matter, so coordinating with whoever runs your payroll and taxes is essential. Our self-employed coverage overview covers where owners get coverage.
Getting it set up right
The practical steps: have the S-corp pay or reimburse the premiums, include them in your W-2 correctly, and claim the deduction on your personal return. Getting the W-2 reporting right is the crux, so work with your accountant to make sure it's handled before year-end. Subsidy eligibility on a Marketplace plan can also interact with this — our guide to how subsidies work touches on the income side.
The takeaway: S-corp owners can effectively deduct health premiums, but only if they flow through the W-2 correctly.
Frequently Asked Questions
How do S-corp owners deduct health insurance?
For more-than-2% shareholders, the S-corp pays or reimburses the premiums and reports them as W-2 wages; you then claim the self-employed health insurance deduction on your personal return.
What's the mistake S-corp owners make with health insurance?
Not running the premiums through the W-2. Without that reporting step, the more-than-2% shareholder can't properly claim the deduction.
Are the premiums subject to payroll taxes?
The premiums added to a 2%-shareholder's W-2 are generally subject to income tax but not Social Security and Medicare tax. Work with your accountant to report it correctly.
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