South Dakota Income Tax Calculator
Calculate your South Dakota (SD) state income tax for 2026. Get an instant estimate based on official SD tax brackets.
Your South Dakota Tax Estimate
South Dakota Tax Brackets for 2026
South Dakota has NO state income tax. Residents pay only federal income tax. This is one of nine US states with no state income tax.
Tax brackets are estimates for 2026. Actual brackets may vary slightly due to inflation adjustments. Check the official South Dakota Department of Revenue for the most current rates.
How South Dakota Income Tax Works
South Dakota is one of nine US states with no state income tax. Residents only pay federal income tax (to the IRS) and FICA (Social Security + Medicare). South Dakota makes up for the lack of state income tax through higher sales tax, property tax, or revenue from natural resources (especially in South Dakota's case).
When you earn income in South Dakota, your employer withholds both federal income tax (sent to the IRS) and SD state tax (sent to the South Dakota Department of Revenue). At tax time, you file two separate returns: one federal (Form 1040) and one SD state return.
Since South Dakota has no state income tax, you only file a federal return (Form 1040). You don't need to file a South Dakota state return. Some South Dakota cities may have local income taxes — check with your city or county for details.
Example: South Dakota Tax on $75,000
A single South Dakota resident earning $75,000 in 2026 would pay approximately:
- Federal tax: ~$10,500 (24% marginal bracket, after deductions)
- SD state tax: $0 (calculated using the brackets above)
- FICA (Social Security + Medicare): $5,738 (7.65% on first $168,600)
- Total annual tax burden: ~$16,200
- Effective tax rate: 21.6% (federal only)
Use the calculator above to get your personalized estimate. Adjust the income to see how raises, bonuses, or side income affect your SD tax.
Frequently Asked Questions
What is the South Dakota state income tax rate for 2026?
South Dakota has NO state income tax. The top marginal rate is 0%.
Does South Dakota have a state income tax?
No, South Dakota does NOT have a state income tax. It is one of nine US states with zero state income tax (the others are Alaska, Florida, Nevada, South Dakota, Tennessee, Texas, Washington, and Wyoming).
How do I file South Dakota state taxes?
You file South Dakota state taxes separately from your federal return. Most residents use state tax software, an accountant, or file directly with the South Dakota Department of Revenue. The state return is due April 15 (or April 30 for some states) — same as federal.
What deductions does South Dakota allow?
South Dakota allows the standard deduction (set by the state, not always the same as federal). Most states also allow itemized deductions, retirement income exclusions, and no state-specific deductions are needed since South Dakota has no state income tax.
Is South Dakota tax-friendly for retirees?
Yes, South Dakota is one of the most tax-friendly states for retirees. There is no state income tax on any income source, including retirement benefits, Social Security, pensions, and 401(k)/IRA withdrawals. Property and sales taxes are the main tax considerations.