In last month’s article, 2026 Health Insurance for S Corporation Owners: A Complete Update, we walked you through the three-step W-2 method that locks in your self-employed health insurance deduction—and the two traps (the box 5 earned-income rule and the Section 318 family attribution rule) that quietly destroy deductions.

That article prompted a question: “What about my dental and vision policies? Do they get the same treatment?” 

Yes. Exactly the same treatment. And if you are age 65 or older, your Medicare premiums join the party too.

This follow-up gives you the proof—with the tax code citations you (or your tax preparer or payroll provider) may want to see—and shows you how to run these premiums through your S corporation the right way.

Why the Law Treats Dental and Vision as Health Insurance

You will not find a tax code section titled “dental insurance” or “vision insurance.” You don’t need one. The chain of authority works like this.

Step 1. The deduction statute. Tax code Section 162(l) grants the self-employed health insurance deduction for amounts paid for insurance that constitute “medical care” for you, your spouse, your dependents, and your children under age 27.

Step 2. The definition. Section 213(d)(1) defines “medical care” as amounts paid for the diagnosis, cure, mitigation, treatment, or prevention of disease, or for the purpose of affecting any structure or function of the body —and includes insurance covering that care. Cleanings, fillings, crowns, orthodontia, eye exams, eyeglasses, and contact lenses all fit squarely within that definition.

A dental policy or a vision policy is simply insurance that pays for medical care.

Step 3. The IRS says it by name. The IRS instructions for Form 7206 (the form that calculates your self-employed health insurance deduction) state that the deduction covers medical, dental, and vision insurance.

The fringe-benefit rules that put you in this regime in the first place are just as broad. Section 1372 treats you—the shareholder-employee who owns more than 2 percent of the company—as a partner for fringe benefit purposes. Notice 2008-1 applies the W-2 mechanics to “accident and health insurance” generally.

Dental and vision policies are accident and health insurance.

Nothing in the statute, the regulations, or the IRS guidance carves out these policies or gives them second-class status.

Key point. Your dental and vision premiums are health insurance premiums. Period.

Run the Same Three Steps

Because dental and vision premiums are health insurance, you run them through the identical three-step process from 2026 Health Insurance for S Corporation Owners: A Complete Update:

Step 1. Get the policies on the corporation’s books. The S corporation pays the dental and vision premiums directly. Or you pay them personally and the corporation reimburses you, with proof of payment.

Step 2. Put the premiums on your W-2. The corporation adds the dental and vision premiums—along with your medical premiums—to box 1 of your W-2, but not to box 3 or box 5. The amounts are wages for income tax purposes but exempt from payroll taxes.

Step 3. Deduct on your Form 1040. You claim the total—medical, dental, and vision premiums together—as your self-employed health insurance deduction on Schedule 1, line 17.

It makes no difference that the dental and vision coverage comes from stand-alone policies with different carriers. Each policy independently qualifies as insurance constituting medical care, and each runs through the same three steps.

Example 1. Your S corporation reimburses your $19,000 family medical policy and reports it properly on your W-2. But you pay your $1,400 dental policy and $600 vision policy personally, and the corporation never reimburses you.

Result. You get no Schedule 1 deduction for the $2,000 of dental and vision premiums because the corporation never established those plans for you. Your only hope is an itemized medical deduction on Schedule A, subject to the 7.5 percent of adjusted gross income floor—which, for most owners, produces nothing.

Example 2. Same facts, except you submit proof of the dental and vision premiums and the corporation reimburses you $2,000 and adds it to box 1 of your W-2 alongside the medical premiums. Now all $21,000 qualifies for the Schedule 1 deduction (assuming you clear the two hurdles below).

Medicare Premiums Get the Same Treatment

If you are age 65 or older—or you employ a spouse or family member who is—here is welcome news: Medicare premiums are insurance constituting medical care, and they qualify for the same S corporation treatment.

The IRS chief counsel confirmed this directly: Medicare premiums qualify for the self-employed health insurance deduction, and for an S corporation shareholder who owns more than 2 percent of the company, the corporation must pay the premiums or reimburse the shareholder and include the amounts in W-2 wages. The Form 7206 and Form 1040 instructions agree.

This covers the full Medicare menu:

Part B (medical insurance), including the income-based surcharges

Part D (prescription drug coverage)

Part C (Medicare Advantage plans)

Medigap (Medicare supplemental policies)

Part A premiums, but only if you are not covered under Social Security and have voluntarily enrolled

Practical point. Most people never write a check for Medicare Part B—the government deducts the premiums from their Social Security benefits. That does not matter. You paid the premiums; the corporation can reimburse you for them. Give the corporation proof (your Form SSA-1099 or Medicare statements). Then have it cut the reimbursement check and add the amount to box 1 of your W-2.

Example 3. Sam, age 67, is the sole owner-employee of his S corporation, which pays him a $70,000 salary (reported in boxes 1, 3, and 5). During the year, Social Security withholds $2,220 of Part B premiums from Sam’s benefits, and Sam pays $780 for Part D and $2,600 for a Medigap policy.

Sam submits proof of all $5,600 to his corporation, which reimburses him and adds the $5,600 to box 1 only—making box 1 wages $75,600 and box 5 wages $70,000. Sam deducts the $5,600 as self-employed health insurance above the line on his Form 1040, Schedule 1, line 17.

The Same Two Hurdles Apply

Because dental, vision, and Medicare premiums ride on the same statute as your medical premiums, they face the same two hurdles from 2026 Health Insurance for S Corporation Owners: A Complete Update.

No access to employer-subsidized coverage. You lose the deduction for any month you or your spouse were eligible to participate in an employer-subsidized health plan—even if you never enrolled.

The box 5 earned-income limit. Your Form 1040 deduction for self-employed health insurance cannot exceed your earned income from the S corporation, which for a shareholder (more than 2 percent) means your box 5 Medicare wages from that corporation.

Key point. The box 5 limit applies to the aggregate. Your medical, dental, vision, and Medicare premiums all draw from the same well. If the combined premiums exceed your box 5 Medicare wages, your deduction stops at the box 5 figure, and the excess falls to Schedule A, where it faces the 7.5 percent floor.

Example 4. Rita’s S corporation pays her a $14,000 salary (boxes 1, 3, and 5) and reimburses $16,000 of medical premiums and $2,000 of dental and vision premiums, all properly added to box 1 (total box 1 wages: $32,000).

Rita’s Schedule 1 deduction is limited to $14,000—her box 5 Medicare wages. The remaining $4,000 lands on Schedule A, where the 7.5 percent floor likely eats it.

Lesson. When setting your salary, count all the premiums—medical, dental, vision, and Medicare—that the corporation will pay or reimburse.

Don’t Forget the Family Attribution Rule

As we explained in 2026 Health Insurance for S Corporation Owners: A Complete Update, the Section 318 family attribution rules treat your spouse, children, grandchildren, and parents who work for the corporation as shareholders of more than 2 percent of the company—even if they own no stock.

That rule doesn’t distinguish among types of coverage. If your S corporation provides or reimburses dental, vision, or Medicare coverage for a family member on the payroll, run their premiums through the same three-step W-2 process.

What About Long-Term Care?

Long-term care insurance also qualifies for the self-employed health insurance deduction, but it plays by its own rulebook: age-based dollar caps on the deductible premium and a separate, plan-by-plan application of the eligibility rules.

Those wrinkles deserve their own article, so we’ll take up long-term care in a separate discussion. For today, know this: do not simply lump long-term care premiums in with your medical, dental, and vision premiums and then deduct the total.

Takeaways

Dental insurance, vision insurance, and Medicare premiums are health insurance from the perspective of the tax law.

Section 162(l) allows the deduction for insurance constituting medical care; Section 213(d)(1) defines medical care broadly enough to capture dental and vision coverage; and the IRS names medical, dental, and vision insurance—and Medicare premiums—in its own instructions.

As an S corporation owner-employee (more than 2 percent), treat every one of these premiums exactly as you treat your medical premiums:

• Have the corporation pay the premiums directly or reimburse you with proof of payment—including Medicare premiums withheld from your Social Security benefits.

• Add the premiums to box 1 of your W-2 but not boxes 3 and 5.

• Deduct the total on Schedule 1 (Form 1040), line 17.

Make sure you cleared the two hurdles: (1) no eligibility for another employer’s subsidized coverage, and (2) box 5 Medicare wages at least equal to the combined premiums. And remember: long-term care insurance follows special rules that we’ll cover in a separate article.