SD · Tax year 2026 · Last reviewed 2026-08-24
LLC vs S Corp in South Dakota: Tax Savings Calculator.
Compare federal payroll taxes, self-employment taxes, South Dakota ’s annual report and estimated S Corp savings in seconds.
At $100,000 net profit with a $50,000 W-2 salary, the federal payroll tax delta is $10,305. Adjusted for South Dakota's recurring cost, the estimated net modeled benefit (yr 1) is$9,105.
LLC Filing Fee
$150
one-time, South Dakota Secretary of State
Annual Franchise / Report (LLC)
$0
no annual report fee modeled
S-Corp Recurring Cost
$0
same as the LLC rate
Estimated Net Modeled Benefit (yr 1)
$9,105
federal delta minus the annual fee
01 · South Dakota model
Tune the inputs. Numbers update live.
What does this mean? Your expected business profit for the year after business expenses but before the owner's salary.
The IRS requires "reasonable compensation" for S-Corp shareholder-employees. The salary is capped at your current net profit.
This is an illustrative assumption, not a tax or an IRS-required amount. Real overhead depends on your payroll provider, your CPA, and your state.
Per IRS Form 8959, these are added to your business income to determine whether the 0.9% Additional Medicare Tax applies.
Sets the Form 8959 threshold: $200K (single / HOH), $250K (MFJ), $125K (MFS).
South Dakota LLC recurring fee (deducted from savings)
$0
No recurring state fee modeled for this state.
Defaults: $100K profit · $50K salary
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LLC
Federal payroll tax
$14,130
S-CORP
Federal payroll tax
$3,825
Federal Payroll / SE Tax Difference
$10,305
LLC SE tax minus the S-Corp's employer-side FICA on the owner salary. This is the federal payroll-tax piece only.
Estimated Net Modeled Benefit (yr 1)
$9,105
- Federal payroll-tax delta
- $10,305
- − South Dakota annual fee
- $10,305
- − Modeled S-Corp admin overhead
- $1,200
- = Estimated net modeled benefit
- $9,105
- − Approx. §199A W-2 drag
- $0
- = Net after QBI drag
- $9,105
Federal delta = the LLC's self-employment tax minus the S-Corp's employer-side payroll tax. The S-Corp employer-side figure ishalf of the standard 12.4% + 2.9% FICA on the salary; the 0.9% Additional Medicare Tax is entirely employee-side (no employer match) and is not included in the S-Corp employer-side comparison. The $150 filing fee is not included — it's a one-time setup cost. Income tax, QBI, health insurance, and retirement contributions are not modeled.
Estimate. Methodology & scope
ESTIMATE. The figures above estimate the federal payroll / self-employment tax difference between a Single-Member LLC (Schedule C / Schedule SE) and an S-Corp election, plus South Dakota's modeled $0 annual report (no recurring franchise tax is currently modeled) and the one-time $150 South Dakota LLC filing fee (setup cost, not deducted from the year-1 net benefit). They do not include federal individual income tax (South Dakota has no individual state income tax, so there is no state income-tax layer to model), the §199A QBI deduction (made permanent under the One Big Beautiful Bill Act, H.R. 1 / Public Law 119-21, signed July 4, 2025, with a 2026 phase-in range of $200K–$275K single / $400K–$550K MFJ), self-employed health insurance, retirement contributions, the half-of-SE-tax Schedule 1 adjustment, filing-status-specific deductions or credits, multi-state apportionment, reasonable-compensation enforcement, or other items that depend on your complete tax situation. The S-Corp administration overhead is a configurable illustrative assumption (defaulted to $1,200/yr), not a tax and not an IRS-required amount. Verify with a licensed CPA, EA, or tax attorney before acting.
02 · Why South Dakota specifically
The state-level numbers that move the answer.
An S-Corp election only pencils out when the federal payroll tax saved outpaces the recurring cost of running a corporate entity. South Dakotacharges $0per year to keep your entity in good standing and does not layer an individual income tax on top of your pass-through income.
At the calculator's default $100K / $50K inputs, the federal delta ($10,305) is what an LLC owner gives up in self-employment tax on net profit. After the South Dakota annual fee, the estimated net modeled benefit is$9,105.
State-specific note: South Dakota has no state individual income tax and no annual report fee for LLCs.
Localized formula — how this number was calculated
// South Dakota — same engine as the homepage
seBase = netProfit × 0.9235
ssPortion = min(seBase, 184_500) × 0.124
medicare = seBase × 0.029
addlMed = max(0, seBase + existingWages − 200_000) × 0.009
llcTax = ssPortion + medicare + addlMed
// S-Corp — employer-side payroll tax only
ssPortion = min(salary, 184_500) × 0.124
medicare = salary × 0.029
standard = ssPortion + medicare
addlMed = max(0, salary + existingWages − 200_000) × 0.009
// employee-side only — no employer match
scorpTax = standard / 2 // 50% of standard FICA — AddlMed excluded
// Net benefit
payrollDelta = llcTax − scorpTax
netOfFee = max(0, payrollDelta − 0)
savings = max(0, netOfFee − 1200) // $1,200 admin overhead- LLC filing: one-time $150 to form the entity in South Dakota.
- Annual franchise / report: $0/yr modeled — confirm with South Dakota Secretary of State whether a filing is required.
- State income tax: not assessed on individual income.
03 · FAQ
LLC vs S Corp in South Dakota — frequently asked questions
Common questions about choosing between an LLC and S Corp in South Dakota, sourced from Google, Reddit, and Quora. The right answer depends on your income, reasonable compensation, and other factors — talk to a CPA for personal advice.
How much does it cost to form an LLC in South Dakota?
South Dakota charges a $150 filing fee to form an LLC. Notably, South Dakota has no annual report fee for LLCs.
Does South Dakota have a state income tax?
No. South Dakota is one of the few states with no individual income tax. This means LLC pass-through income and S-Corp distributions are not taxed at the state level.
Is an S Corp election worth it in South Dakota?
Yes, and it's especially attractive because South Dakota has no state income tax and no annual report fee. At $100K net profit, the full federal savings of $5,500–$6,000 flow through cleanly. The election typically becomes worthwhile once net profit exceeds $50K–$60K.
Does South Dakota have a corporate income tax?
No. South Dakota has no corporate income tax and no gross receipts tax, making it one of the most tax-friendly states for businesses.
Why is South Dakota popular for LLCs?
South Dakota has no individual income tax, no corporate income tax, no gross receipts tax, and no annual report fee for LLCs. Combined with strong asset protection laws, it's a popular choice for business owners seeking tax efficiency.
04 · Compare against
Run the model against another state.
05 · Methodology