South Dakota charges no state income tax on wages, so every rung of this ladder carries the same two federal layers and nothing else: federal income tax under the national bands, and FICA (Social Security and Medicare). The ladder runs ten salaries from $25,000 to $300,000 through that model.
On a $75,000 salary the combined deductions in this model are $13,408: $7,670 of federal income tax, no state income tax and $5,738 of FICA, leaving take-home pay of $61,593 — an effective rate of 17.9%.
| Gross salary | Federal tax | South Dakota state tax | FICA | Total deductions | Take-home pay | Effective rate |
|---|---|---|---|---|---|---|
| $25,000 | $890 | $0 | $1,913 | $2,803 | $22,198 | 11.2% |
| $40,000 | $2,620 | $0 | $3,060 | $5,680 | $34,320 | 14.2% |
| $50,000 | $3,820 | $0 | $3,825 | $7,645 | $42,355 | 15.3% |
| $60,000 | $5,020 | $0 | $4,590 | $9,610 | $50,390 | 16.0% |
| $75,000 | $7,670 | $0 | $5,738 | $13,408 | $61,593 | 17.9% |
| $100,000 | $13,170 | $0 | $7,650 | $20,820 | $79,180 | 20.8% |
| $125,000 | $18,734 | $0 | $9,563 | $28,297 | $96,704 | 22.6% |
| $150,000 | $24,734 | $0 | $11,475 | $36,209 | $113,791 | 24.1% |
| $200,000 | $36,734 | $0 | $14,339 | $51,073 | $148,927 | 25.5% |
| $300,000 | $68,134 | $0 | $16,689 | $84,823 | $215,177 | 28.3% |
The $75,000 row is highlighted. FICA is Social Security (6.2% up to $184,500 of wages), Medicare (1.45%), Additional Medicare Tax (0.9% on wages above $200,000), the same on every state's ladder. Figures model a single employee with the standard federal and state allowances only.
Read the ladder from the bottom up. The combined effective rate starts at 11.2% on $25,000 and reaches 28.3% on $300,000, and every step of that climb comes from the federal layer, because the state line is $0 on every rung. The state tax column is the only part of the bill that changes if the same salary is earned in a different state; the federal tax and FICA columns are identical on every state's ladder.
The federal layer is the standard United States model: a single employee, the federal standard deduction and no itemised deductions or personal credits. The full method is on the Methodology page.
Run your own exact salary through the federal and South Dakota layers, with the breakdown line by line.
Open the calculator →The federal layer on its own: bands, FICA and worked examples for the whole country.
Open the calculator →All 50 states and DC ranked by take-home pay on $100,000 and $50,000 salaries, computed from the same files as this guide.
See the ranking →Salary guides for every state, the no-income-tax states and the flat-tax states, in one index.
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