S Corp Health Insurance: Put Your Premiums on the W-2 Before the Last Payroll

If you own more than 2% of your S corp, health insurance premiums the company pays for you belong in box 1 of your W-2, as wages. They stay out of boxes 3 and 5, so neither you nor the company pays Social Security or Medicare tax on them. You then take the same amount back as the self-employed health insurance deduction on your own return. The deduction only works if the company paid or reimbursed the premiums during the year and put them on that year’s W-2. For 2026, the clean way to do that is in your last payroll of December.

The IRS states it plainly on its page on S corporation compensation and medical insurance issues: “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.” Here is how to get your S corp health insurance onto the right W-2 lines before the year closes, what each W-2 box should show, and how the numbers work on a $9,600 family policy.

Are you a 2% shareholder?

The rule covers anyone who owns more than 2% of the company’s stock, or more than 2% of its voting power, on any day of the tax year. That definition is in section 1372 of the tax code. For most owner-run contracting companies it means every owner, and in a one-owner S corp it means you.

Family members can be caught too. Section 318 treats you as owning the shares held by your spouse, children, grandchildren and parents, and treats them as owning yours. So if your spouse runs the office or your son works on the crew, company-paid premiums for their own coverage follow the same rule, even if neither of them holds a share. Siblings are not on that list.

Why does any of this matter? For fringe benefits, a 2% shareholder is treated like a partner, not like an employee. In Revenue Ruling 91-26, the IRS held that premiums paid for a 2% shareholder are not tax-free under the ordinary employee rule. That’s why your premiums go into your wages first and come back out as a deduction on your Form 1040.

Step one: the company pays or reimburses the 2026 premiums

The policy can be in the company’s name or in yours. What counts is who ends up paying, and when. IRS Notice 2008-1 sets out when an S corporation has “established” a health plan for a 2% shareholder, and the deduction depends on meeting it. There are two ways to qualify:

• the company pays the insurer directly, for a policy in its name or in yours; or
• you pay the insurer, give the company proof of payment, and the company reimburses you.

Either way, the payment or reimbursement has to happen “in the current taxable year”. Suppose you paid your 2026 premiums from your personal account and the company never paid you back. A reimbursement made in 2027 does not fix 2026. Pull together this year’s premium statements now, and have the company reimburse you before the last pay date of December.

The notice gives one example where the owner loses the deduction outright: a policy in the owner’s name, paid personally, with nothing from the company. If that describes your setup, you still have time to change it for 2026.

Step two: add the premiums to box 1 through payroll

Give your payroll provider or accountant the total the company paid or reimbursed for your coverage in 2026, and ask them to run it through payroll before the final pay date. Doing it through payroll keeps your forms consistent. The amount then shows on the company’s fourth-quarter Form 941, the federal payroll return, as well as in box 1 of your W-2. An amount added only to the W-2 at year-end leaves the two out of step.

The premiums are subject to federal income tax withholding, so your provider may withhold on them. They are not subject to Social Security, Medicare or federal unemployment tax when the coverage is provided under a plan for all employees or a class of employees. That condition comes from section 3121(a)(2)(B), and it is why the premiums stay out of boxes 3 and 5. If you aren’t sure your arrangement meets it, ask your accountant before December.

Step three: check your W-2 before February 1

Your 2026 W-2s are due to the Social Security Administration, and to each employee, by February 1, 2027, because January 31 falls on a Sunday. Before your provider files, read your own form against this list:

• Box 1, wages: your salary plus the premiums.
• Boxes 3 and 5, Social Security and Medicare wages: your salary only.
• Box 14a, other: the premiums as a labeled information item. For 2026 the IRS split box 14 into 14a and 14b, and the S corporation return instructions ask for this entry.
• Box 12, code DD: nothing for your premiums. The IRS reporting chart says not to report a 2% shareholder’s premiums that are included in income.

On the company’s return, Form 1120-S, the premiums are deducted as officer compensation, not as an employee benefit program. Your accountant fills that line. It still helps to know, so the W-2 and the return tell the same story.

Where the deduction goes on your return

The self-employed health insurance deduction comes from section 162(l) of the tax code, and you claim it without itemizing. You figure it on Form 7206, the IRS form for this deduction, or on the worksheet in the Form 1040 instructions if your case is simple. The result goes on Schedule 1 (Form 1040), line 17.

Two limits decide how much of the $9,600, or whatever your premiums are, you can take:

• Your Medicare wages from that S corp set the ceiling. Form 7206 uses box 5, not box 1, so a very low salary can cap the deduction below your premiums.
• Any month you could have joined a subsidized employer plan is out, even if you didn’t join it. That includes a plan through your spouse’s job, and through the employer of a dependent or of your child under 27.

The deduction covers medical, dental and vision insurance, plus qualified long-term care insurance, for you, your spouse, your dependents and a child under 27. Long-term care premiums have age-based caps. If you include them, you have to use Form 7206 rather than the 1040 worksheet.

The numbers on a $9,600 family policy

This is an illustration, not a real client. You own all of a remodeling company taxed as an S corporation and pay yourself a $60,000 salary. The company pays an $800 monthly premium on a family policy, so $9,600 for 2026. Neither you nor your spouse could join a subsidized employer plan at any point in the year.

Your W-2 shows $69,600 in box 1 and $60,000 in boxes 3 and 5. The company deducts the $9,600 as officer compensation. On your own return, the $9,600 in wages and the $9,600 deduction on Schedule 1 cancel each other out. The company’s deduction, meanwhile, lowers the profit on your K-1. In effect, the premiums are paid with pre-tax dollars.

Now compare the other way of doing it: paying yourself the same $9,600 as extra salary and buying the policy personally. Extra salary carries 15.3% in Social Security and Medicare tax, half from the company and half from you. On $9,600 that’s $1,468.80 of federal payroll tax the premium route avoids. The figure holds while your salary stays under the 2026 Social Security wage base of $184,500.

Keep the salary itself reasonable. The IRS expects an S corporation to pay “reasonable compensation” for your work before it pays you distributions, and the premiums don’t count toward that salary. So don’t cut your cash pay and call the premium part of it. Our LLC vs S-Corp breakdown explains how the salary and distribution split works.

An HSA or a QSEHRA for the owner

If the company also puts money into your health savings account, the pattern is similar. Under IRS Notice 2005-8, the contribution goes in box 1 and is generally not Social Security or Medicare wages. You then deduct it on Form 8889. Since January 1, 2026, a bronze or catastrophic plan bought on an Exchange also counts as HSA-compatible.

A QSEHRA or an individual coverage HRA won’t cover you. The IRS says a 2% shareholder can’t participate in either, so those arrangements are for your crew. Our guide to health reimbursement for a small crew covers that side. The same December meeting is a good time to settle retirement plan contributions, the other owner benefit tied to year-end payroll.

If the premiums never reached box 1

What if you find in February that the company paid your 2026 premiums but they never reached box 1? Talk to your accountant before you file. The usual fix is Form W-2c, the corrected wage statement, filed with Form W-3c and a matching correction to the 941. No IRS guidance promises that a correction saves the deduction in every case. And if the company never paid or reimbursed the premiums during 2026, no later form can create a 2026 plan.

So the test for December is short. If the company has paid or reimbursed every 2026 premium, and your payroll provider has the total in box 1 but not in boxes 3 and 5, the company’s part is done. If either piece is missing, fix it before the last pay date, not in April. For the rest of the year-end list, see our roundup of contractor tax deductions.