Introduction

If you own more than 2% of an S corporation, understanding how your health insurance premiums are handled for tax purposes is crucial. The IRS has clear rules about reporting and deductions to ensure compliance and maximize your tax benefits.

The more-than-2% rule also reaches certain family members who work for the S corporation (spouse, children, parents, grandparents of a more-than-2% owner). Their health premiums follow the same W-2 Box 1 treatment, not the tax-free treatment regular employees get.

Reporting Health Insurance Premiums

  • The S corporation deducts the health insurance premiums it pays on behalf of the shareholder as a business expense.
  • These premiums must be reported as wages on the shareholder-employee's Form W-2 in Box 1 (Wages, tips, other compensation).
  • However, these amounts are not subject to Social Security, Medicare (FICA), or FUTA taxes and are excluded from Boxes 3 and 5 of the W-2.
  • The premiums often appear in Box 14 for informational purposes.

Taking the Tax Deduction

  • The shareholder can claim an above-the-line deduction for these premiums on their personal tax return (Schedule 1, Form 1040), which reduces adjusted gross income (AGI).
  • The deduction is disallowed for any month in which you or your spouse were eligible to participate in an employer-subsidized health plan elsewhere (for example, a hospital W-2 job's plan), even if you declined it. Months without such eligibility still qualify.
  • The deduction also cannot exceed the wages the S corporation paid you (Form W-2, Box 1 from the corporation). In practice this is rarely a limit for physician owners, but it is one more reason the premiums must run through payroll.

Payment and Documentation Requirements

  • The health insurance plan must be established by the S corporation, meaning the premiums are either paid directly by the corporation or the shareholder is reimbursed by the corporation.
  • If the shareholder buys insurance independently but the S corporation reimburses the premiums and reports them as wages, the deduction is allowed.
  • Medicare premiums (Parts B and D, and Medicare-related supplemental coverage) paid for the shareholder can also qualify, as long as the S corporation pays or reimburses them and includes them in Box 1 wages like any other premium.
  • Maintain thorough records including proof of payments and reimbursements.
  • If the shareholder is the sole employee, insurance may have to be purchased individually due to state laws restricting group coverage for one employee.