Short answer: if you own more than 2% of an S corporation in Mississippi, the company pays or reimburses your health insurance premiums and puts them in Box 1 of your W-2 as wages, but not in the Social Security and Medicare boxes. You then take them back off your income as the self-employed health insurance deduction, on Form 7206 and Schedule 1, line 17. Mississippi takes the same deduction on Form 80-100 (line 58), so it lowers your state tax too: 3.75% of it for 2027. (Reviewed November 2026 by Daniel Griffin, licensed independent advisor, NPN #22052447. Not tax advice; confirm with your tax preparer.)
- $9,301a year of the lowest-cost Silver plan for a 40-year-old in the typical Mississippi county, 2027
- $1,423of Social Security and Medicare tax a Mississippi owner skips on it, against the same amount paid as salary under $192,300
- Box 1where those premiums land on your W-2; Boxes 3 and 5 stay clear of them
- 3.75%Mississippi’s 2027 rate above the first $10,000 of taxable income
How the Money Moves in Mississippi
- Buy the planAny of the 3 insurers on the Mississippi marketplace, or a private plan, in your name or the company’s.
- The S corp pays$860 a month for a 40-year-old’s cheapest 2027 Silver plan in Jackson, paid or reimbursed by the company.
- Payroll adds it$10,325 a year goes into W-2 Box 1 wages, not Boxes 3 and 5.
- Form 7206The deduction is worked out there, capped at your Medicare wages.
- Schedule 1Line 17: the $10,325 comes back off your income.
A more-than-2% shareholder is treated like a partner for fringe benefits, so the premiums cannot be a tax-free benefit the way they are for staff. IRS Notice 2008-1 is the route around that: wages for income tax, left out of Social Security and Medicare wages, then deducted under section 162(l).
Paying the premiums from your personal account and never running them through the company. The IRS’s own example in Notice 2008-1 is a shareholder who pays for a policy in their own name with no reimbursement: no plan established by the S corporation, no deduction.
In Jackson that mistake costs the whole $10,325 and roughly $2,478 of federal income tax at 24%. The fix has a deadline: the company pays or reimburses the premiums by December 31 and adds them to your W-2. The year-end checklist has every date in order.
Work out your deduction
Form 7206-style worksheet. An estimate, not a tax return.Presets: the typical lowest-cost Mississippi Silver plan for 2027. Line 10: Social Security tax to the $192,300 wage base, Medicare 2.9%, plus 0.9% over $200,000. Nothing you type leaves this page until you send it.
The Cap Most Owners Miss
The deduction cannot be more than your earned income from the S corporation, which for a more-than-2% shareholder means wages as defined for Social Security and Medicare tax (section 162(l)(5)), Box 5 of the W-2. The premiums are in Box 1 but not Box 5, so they never raise the cap, and an owner who takes no salary gets no deduction at all. For the Jackson plan above, a salary of $10,325 or more keeps every dollar deductible.
Three More Rules
- The spouse ruleNo deduction for any month you could join a subsidized employer plan, yours or your spouse’s, even if you did not enroll.
- Family countsYour spouse, dependents and any child under 27 at year end are covered; a Mississippi family of four’s typical lowest-cost Silver plan is $2,320 a month, $27,846 a year to deduct. A spouse, child, grandchild or parent of the owner counts as a 2% shareholder too.
- Marketplace creditOnly the premium you pay after any premium tax credit is deductible. Above $63,840 of income for one person there is no 2027 credit, so the full premium counts.
What It Is Worth in Mississippi for 2027
| Household | Per month | Deductible per year | Federal tax saved at 22% | At 24% | Plus Mississippi tax at 3.75% |
|---|---|---|---|---|---|
| One adult, 40 | $775 | $9,301 | $2,046 | $2,232 | $349 |
| Two adults, 40, and two children | $2,320 | $27,846 | $6,126 | $6,683 | $1,044 |
Mississippi taxes nothing on the first $10,000 of taxable income and a flat rate above it: 4% for 2026 and 3.75% for 2027. Its Form 80-100 takes the self-employed health insurance deduction you claimed federally (line 58). The marketplace in Mississippi has 3 insurers for 2027, a median of 34 plan options per county, and no PPO in any of its 82 counties: every plan is an HMO. Above $63,840 of household income for one person ($132,000 for a family of four) there is no premium tax credit, so the deduction carries the full saving.
What It Saves Across Mississippi
| Where | Lowest Silver, per month | Deductible per year | Federal tax saved at 24% | Payroll tax not charged | Mississippi tax saved at 3.75% |
|---|---|---|---|---|---|
| Jackson (Hinds County) | $860 | $10,325 | $2,478 | $1,580 | $387 |
| Gulfport (Harrison County) | $758 | $9,096 | $2,183 | $1,392 | $341 |
| Southaven (DeSoto County) | $790 | $9,480 | $2,275 | $1,450 | $355 |
| Brandon (Rankin County) | $860 | $10,325 | $2,478 | $1,580 | $387 |
| Ridgeland (Madison County) | $860 | $10,325 | $2,478 | $1,580 | $387 |
Mississippi’s Rate Is Stepping Down
Mississippi taxes the first $10,000 of taxable income at 0% and the rest at a flat rate that keeps falling: 4.4% for 2025, 4% for 2026 and 3.75% for 2027. At 3.75%, a year of the typical lowest-cost Silver plan, $9,301, saves $349 in Mississippi tax.
Want plans priced for the deduction?
Send your ZIP code. A licensed agent compares every Mississippi plan for your county and sets up the paperwork your payroll person needs.
Check My Options →Free · No obligation · Licensed agents in 31 states · NPN #22052447
Sole proprietor, partner or C corporation owner instead? The rules differ: see the self-employed health insurance deduction in Mississippi and how each kind of business handles owner health insurance. With staff in Mississippi, see S corp owners in Mississippi and ICHRA for small businesses.
Before the year closes: the year-end checklist, every date in order. Tax professionals with Mississippi clients: a printable one-page Mississippi handout.
Common Questions
Can an S corp owner deduct health insurance in Mississippi?
Yes, if you own more than 2% and the S corporation pays or reimburses the premiums and reports them in Box 1 of your W-2. You deduct them on Form 7206 and Schedule 1, line 17. Mississippi takes the same deduction on Form 80-100 (line 58), so it lowers your state tax too: 3.75% of it for 2027.
What if I paid the premiums from my personal account?
Have the S corporation reimburse you and add the amount to your W-2 before it is issued. A policy you pay yourself with no payment or reimbursement by the company gets no deduction; in Jackson that is $10,325 a year on the cheapest Silver plan for a 40-year-old.
What is Mississippi’s income tax rate for 2027?
3.75% on taxable income above $10,000, down from 4% for 2026, according to the Mississippi Department of Revenue.
Sources
- IRS, Instructions for Form 7206 (2025)
- IRS, Notice 2008-1 (2-percent S corporation shareholders)
- 26 U.S. Code section 162(l)
- IRS, Publication 974 (premium tax credit)
- Mississippi Department of Revenue, Individual income tax general information
- CMS, Plan Year 2027 Qualified Health Plan Landscape file
- HHS, 2026 poverty guidelines (2027 coverage)
- Social Security Administration, 2027 fact sheet (wage base)
- Mississippi Department of Revenue, 2025 Form 80-100 instructions