South Dakota Has No Income Tax — Here's What $100,120 Takes Home
South Dakota levies no state income tax, so a $100,120 salary nets $78,820 — only federal income tax and FICA apply. Combined effective rate: 21.3%.
Full Tax Breakdown — $100,120 in South Dakota (Single Filer)
| Tax Item | Amount | Rate |
|---|---|---|
| Gross Salary | $100,120 | — |
| Federal Income Tax | − $13,640 | 13.6% |
| Social Security (6.2%) | − $6,207 | 6.2% |
| Medicare (1.45%+) | − $1,452 | 1.5% |
| Total Taxes | − $21,300 | 21.3% |
| Take-Home Pay | $78,820 | 78.7% |
$100,120 After Tax by Filing Status in South Dakota
| Filing Status | Federal Tax | Total Tax | Take-Home | Rate |
|---|---|---|---|---|
| Single | $13,640 | $21,300 | $78,820 | 21.3% |
| Married Filing Jointly | $7,937 | $15,597 | $84,523 | 15.6% |
| Married Filing Separately | $13,640 | $21,300 | $78,820 | 21.3% |
| Head of Household | $10,251 | $17,911 | $82,209 | 17.9% |
Married filing jointly adds a standard deduction of $30,000 vs $15,000 for single filers (2026 IRS rules).
Nearby Salary Comparisons in South Dakota (Single)
| Gross Salary | Take-Home / Year | Monthly | Hourly | Eff. Rate |
|---|---|---|---|---|
| $75,120 | $61,233 | $5,103 | $29 | 18.5% |
| $90,120 | $71,785 | $5,982 | $35 | 20.3% |
| $110,120 | $85,855 | $7,155 | $41 | 22.0% |
| $125,120 | $96,273 | $8,023 | $46 | 23.1% |
| $150,120 | $113,360 | $9,447 | $55 | 24.5% |
South Dakota Tax Overview
South Dakota levies no state income tax on wages, putting it among 9 states that leave that portion of the tax burden entirely to the federal government. That makes SD especially attractive to high earners — a $150,000 salary keeps roughly $8,000 more annually than a comparable earner in a 5% flat-rate state. No local income taxes apply in most jurisdictions.
Married Filing Jointly at $100,120 in South Dakota
Filing jointly, take-home rises to $84,523 ($7,044/month) — saving $5,703 in total taxes versus single filing due to the higher $30,000 standard deduction.