Short answer: if you are self-employed in South Dakota with a profit, you can deduct the health insurance you pay for yourself, your spouse, your dependents and children under 27, on Form 7206 and Schedule 1, line 17. Three limits apply: no month you could join an employer plan (yours or your spouse’s), no more than the business’s profit, and no cut to self-employment tax. South Dakota has no state income tax, so the saving is federal. (Reviewed November 2026 by Daniel Griffin, licensed independent advisor, NPN #22052447. Not tax advice; confirm with your tax preparer.)
- $9,203a year of the lowest-cost Silver plan for a 40-year-old in the typical South Dakota county, 2027, all deductible
- $63,840the 2027 subsidy line for one person in South Dakota; the deduction can pull your income under it
- Line 17of Schedule 1, where a South Dakota contractor, consultant or LLC owner claims it
- 3marketplace insurers in South Dakota for 2027: Avera, Sanford and Wellmark
Who Qualifies in South Dakota
- You have a net profit as a sole proprietor or single-member LLC (Schedule C or F), or self-employment earnings as a partner.
- The plan is under your business. For a sole proprietor, a policy in your own name counts, from the South Dakota marketplace or a private plan.
- No employer plan was open to you that month, through your own job or your spouse’s, even one you turned down.
- The people covered are you, your spouse, your dependents, or a child under 27 at the end of the year.
Own an S corporation? The company has to pay the premiums and put them on your W-2: see the S-corp health insurance deduction in South Dakota.
The Three Limits
- The spouse ruleAny month your spouse’s employer offers you a subsidized plan is out, even if you never enrolled. Count the months carefully when a spouse changes jobs.
- The profit capNo more than the business earned after the deductible half of self-employment tax and your SEP, SIMPLE or solo 401(k) contributions. The cheapest Sioux Falls Silver plan at 40, $6,733 a year, needs at least that much left.
- Not for SE taxIt lowers income tax only. On $72,000 of profit, self-employment tax is still about $10,173 either way.
Work out your deduction
Form 7206-style worksheet. An estimate, not a tax return.Presets: the typical lowest-cost South Dakota Silver plan for 2027. Schedule SE rates and the $192,300 wage base; Line 11 counts no other income. Nothing you type leaves this page until you send it.
The Deduction and the South Dakota Subsidy Line
For 2027 coverage there is no premium tax credit above 400% of the poverty line: $63,840 for one person, $132,000 for a family of four. The self-employed health insurance deduction comes off before that test, so it can move you to the right side of the line.
A single 40-year-old with $72,000 of profit pays $10,173 in self-employment tax and deducts half, $5,087. Before the health insurance deduction that leaves $66,913, over the line. Deduct a year of the lowest-cost Silver plan, $9,203, and the figure drops to $57,711, $6,129 under it.
Then the credit lowers the premium you pay, which lowers the deduction. IRS Publication 974 has the method that settles both numbers together; a licensed agent or your tax preparer can run it before you pick a plan.
What It Is Worth in South Dakota for 2027
| Household | Per month | Deductible per year | Federal tax saved at 22% | At 24% |
|---|---|---|---|---|
| One adult, 40 | $767 | $9,203 | $2,025 | $2,209 |
| Two adults, 40, and two children | $2,452 | $29,423 | $6,473 | $7,061 |
South Dakota has no personal income tax and no corporate income tax: the Department of Revenue says the state has no corporate, unitary or personal income tax. For an owner-run business the federal saving is the whole picture. The marketplace in South Dakota has 3 insurers for 2027, a median of 25 plan options per county, and a PPO in every one of its 66 counties.
Bronze, Silver and Gold in South Dakota
| Where | Lowest Bronze | Lowest Silver | Lowest Gold | Gold against Silver |
|---|---|---|---|---|
| Sioux Falls (Minnehaha County) | $439 | $561 | $602 | $41 more |
| Sioux Falls suburbs (Lincoln County) | $439 | $561 | $602 | $41 more |
| Rapid City (Pennington County) | $565 | $799 | $814 | $15 more |
| Aberdeen (Brown County) | $474 | $606 | $636 | $30 more |
| Brookings (Brookings County) | $542 | $760 | $781 | $22 more |
Silver is the cheaper of the two in every South Dakota county for 2027, and Gold buys a lower deductible. In Sioux Falls the cheapest Gold plan is $602 a month with a $2,500 deductible; the cheapest Silver is $561 with a $6,400 deductible. Above the subsidy line you pay the whole premium yourself, so weigh the monthly gap against the deductible you expect to use; whichever plan you choose, its full premium is what you deduct.
Bronze and an HSA. Since 2026 every Bronze plan sold through the marketplace counts as an HSA-qualified plan (IRS Notice 2026-05). In Sioux Falls the cheapest Bronze for a 40-year-old is $439 a month with a $7,500 deductible, $1,470 a year less than the cheapest Silver. For 2027 you can also put up to $4,500 into the HSA ($9,000 with family coverage): a second deduction, on Form 8889, on top of the premiums.
South Dakota Business Taxes When You Work for Yourself
Nothing changes at the state level for a sole proprietor or LLC owner: South Dakota has no personal or corporate income tax, so there is no state return to carry the deduction.
Want the plan and the deduction worked out together?
Send your ZIP code. A licensed agent compares every South Dakota plan for your county and checks where your income lands against the subsidy line.
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How to Claim It
- Keep the recordsPremium statements for each month, and any marketplace Form 1095-A.
- Count the monthsLeave out any month an employer plan was open to you or your spouse.
- Form 7206A year of the Sioux Falls plan, $6,733, capped at your profit after half of SE tax and retirement savings.
- Schedule 1Line 17: the result comes off your income on Form 1040.
Before the year closes: the year-end checklist, every date in order. Tax professionals with South Dakota clients: a printable one-page South Dakota handout.
Common Questions
Can I deduct health insurance if I am self-employed in South Dakota?
Yes, if your business has a net profit and you could not join an employer plan, yours or your spouse’s, that month. You deduct the premiums on Form 7206 and Schedule 1, line 17. South Dakota has no state income tax, so the saving is federal.
Can the deduction help me qualify for a premium tax credit?
It can. The deduction lowers the income tested against the 2027 subsidy line ($63,840 for one person, $132,000 for a family of four). The credit then lowers the premium you deduct, and IRS Publication 974 settles both together.
Why do South Dakota health insurance prices differ so much by county?
Each county has its own mix of the three insurers and their networks. For 2027 the lowest-cost Silver plan for a 40-year-old is about $561 a month in Minnehaha County (Sioux Falls) and about $799 in Pennington County (Rapid City).
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)
- South Dakota Department of Revenue, Sales and Use Tax Guide (July 2026), page 4
- CMS, Plan Year 2027 Qualified Health Plan Landscape file
- HHS, 2026 poverty guidelines (2027 coverage)
- Social Security Administration, 2027 fact sheet (wage base)
- South Dakota Department of Revenue, Business Tax
- IRS, Notice 2026-05 (Bronze and catastrophic plans as HSA-qualified plans)
- IRS, Revenue Procedure 2026-24 (2027 HSA limits)