South Dakota 1099 Self-Employment Tax Calculator
South Dakota has no state income tax. Estimate your self-employment tax, federal and South Dakota state tax, effective rate, and quarterly payment amounts below.
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Effective rate
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Take-home
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- Self-employment tax
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- Federal income tax
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- State income tax
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Quarterly payment vouchers
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Estimates for tax year 2026, for informational purposes only — not tax advice. California's 2026 brackets haven't been published yet, so the most recent confirmed prior-year schedule is used as a placeholder; figures for New York, Ohio, Georgia, Virginia, Arizona, Massachusetts, Utah, Vermont, Maine, Mississippi, Missouri, Colorado, Connecticut, Delaware, Idaho, New Mexico, Oklahoma, and Oregon are drawn from secondary sources pending direct confirmation against the state's own published schedule. Consult a tax professional before filing.
South Dakota self-employment tax, explained
South Dakota has no state income tax, so a freelancer's quarterly estimated payments only need to cover federal income tax and self-employment tax — there's no state voucher to track at all.
Self-employment (SE) tax is the same everywhere — 15.3% of 92.35% of your net profit, split between Social Security (12.4%, up to the annual wage base) and Medicare (2.9%, uncapped). What changes by state is the income tax layer on top: South Dakota has no state income tax, applied to your taxable income after federal deductions. For filing status, South Dakota's tax doesn't apply at all, regardless of filing status, since the state has no personal income tax.
South Dakota state tax at different income levels
Computed directly from South Dakota's actual 2026 tax structure — a single filer with no other income and no expenses, at increasing levels of net 1099 profit:
| Net profit | South Dakota state tax | Effective state rate |
|---|---|---|
| $50,000 | $0 | 0.0% |
| $100,000 | $0 | 0.0% |
| $150,000 | $0 | 0.0% |
| $250,000 | $0 | 0.0% |
South Dakota worked example
A single freelancer in South Dakota with $75,000 in net 1099 income and no other income:
- Self-employment tax: $10,597
- Federal income tax: $4,898
- South Dakota state income tax: $0
- Total tax: $15,495 (about 20.7% effective rate)
- Take-home: $59,505
- Quarterly estimated payment: $3,486 per quarter
Try your own numbers in the calculator above — your actual income, expenses, and filing status will change these figures.
Frequently asked questions
What is the South Dakota state income tax rate for 1099 income?
South Dakota has no state income tax. Its tax doesn't apply at all, regardless of filing status, since the state has no personal income tax. See the "South Dakota self-employment tax, explained" section above for how it applies to your specific numbers.
How is self-employment tax calculated?
Self-employment tax is 15.3% of your net self-employment earnings (92.35% of net profit): 12.4% Social Security up to the annual wage base, plus 2.9% Medicare on all net earnings. If your combined income exceeds the Additional Medicare Tax threshold for your filing status, an extra 0.9% applies above that threshold.
What's the difference between self-employment tax and income tax?
Self-employment tax funds Social Security and Medicare — it's the self-employed equivalent of the payroll taxes an employer would otherwise split with you. Federal (and state) income tax is separate, calculated on your taxable income after deductions like the standard deduction and the QBI deduction.
Other Midwest states
- Illinois 1099 tax calculator
- Ohio 1099 tax calculator
- Michigan 1099 tax calculator
- Wisconsin 1099 tax calculator
- Iowa 1099 tax calculator
- Kansas 1099 tax calculator
- Minnesota 1099 tax calculator
- Missouri 1099 tax calculator
See all 50 states → · ← Back to the main 1099 self-employment tax calculator