South Dakota Income Tax Calculator, Rates and Brackets
Estimate how much federal and South Dakota state income tax you will owe for 2026.
Use our South Dakota income tax calculator to estimate your 2026 state income tax, compare South Dakota and federal tax results, and review the state's current income tax rates and brackets. For 2026, South Dakota does not impose a personal income tax on wages, salaries, retirement income, or other individual income. Enter your household income, filing status, dependents, deductions, and credits to see how living in a no income tax state affects your state and federal income taxes.
2026 South Dakota Income Tax Calculator
South Dakota and Federal Calculation Assumptions
Income
- This calculator assumes you are a South Dakota resident for the full 2026 tax year. Partial-year resident and nonresident income allocation rules are not included.
- We treat household income as earned wage income. We do not separately calculate self-employment income, investment income, retirement income, capital gains, or other special income categories that require different tax treatment.
- The
Other Income Deductions
field under Advanced Options reduces federal adjusted gross income. See the input field tooltip for more details.
Deductions
- The calculator compares itemized deductions with the standard deduction separately, then uses the larger allowed amount for federal tax.
- Age 65+ and blindness selections increase the standard deduction amount when applicable.
- The federal enhanced senior deduction is calculated separately and may still apply when itemizing.
- Itemized deduction inputs mirror the categories reported on Form 1040 Schedule A. Use prior-year amounts as a starting point and adjust for expected changes.
- The federal calculation applies the 2026 SALT limit and its income-based phaseout before adding deductible interest and other itemized deductions.
- Qualified tips, overtime pay, car loan interest, and the enhanced senior deduction are treated as federal deductions after adjusted gross income.
Credits
- We estimate the federal Child Tax Credit (CTC) and Additional Child Tax Credit (ACTC) for dependent children under age 17.
- We estimate the federal Earned Income Tax Credit (EITC) only when at least one dependent child under age 17 is entered. The estimate does not include the childless EITC or qualifying children who are older students or permanently disabled.
- We do not calculate the Saver's Credit, education credits, premium tax credits, or other federal credits.
Taxes Not Included
- South Dakota individual income tax is estimated at $0 because the state does not impose a personal income tax.
- Income not taxed by South Dakota may still be taxable for federal income tax purposes.
- South Dakota does not impose a local individual income tax, so no local income tax calculation is included here.
- The estimate does not include self-employment tax, federal alternative minimum tax, capital gains tax, use tax, or every federal deduction and credit.
Actual results may vary based on your income type, additional deduction and credit limits, filing complexity, and continued changes in South Dakota or federal tax law. This calculator provides an estimate for general planning purposes and does not guarantee your final tax due or refund amount.
How the South Dakota Income Tax Calculator Works
The South Dakota income tax calculator shows each major step from household income to estimated tax. The results compare South Dakota and federal income taxes. The South Dakota column remains at $0, while the federal column applies federal standard or itemized deductions, tax credits, and deductions created by the One Big Beautiful Bill Act (OBBBA).
The final three rows summarize your South Dakota results:
- Estimated Income Tax: Your South Dakota income tax estimate for the year.
- Effective Tax Rate: South Dakota income tax as a percentage of household income.
- Marginal Tax Rate: The South Dakota tax rate applied to your next dollar of taxable income.
Change any calculator input to see how it affects the federal results. The South Dakota column remains at $0 because South Dakota does not impose a personal income tax.
South Dakota Income Tax
South Dakota does not impose an individual state income tax for the 2026 tax year. The South Dakota income tax rate is 0%, and residents do not move through state income tax brackets as income increases. Filing status does not change the South Dakota result: Single, Married Filing Jointly, Married Filing Separately, and Head of Household filers all have an estimated South Dakota individual income tax of $0.
Because South Dakota has no individual income tax, the state does not use personal exemptions, standard deductions, itemized deductions, or state income tax credits for individual income tax purposes. Federal income tax rates still apply, so income that is not taxed by South Dakota may still be taxable on your federal return.
South Dakota Retirement Income and Federal Income Tax
South Dakota does not tax pensions, distributions from retirement accounts, Social Security benefits, or other retirement income through a state individual income tax. Federal tax rules may still apply, so retirees may still owe federal income tax depending on the type and amount of retirement income they receive.
South Dakota Income Tax Takeaways
South Dakota has no individual income tax: Residents do not owe South Dakota personal income tax on wages or other individual income for 2026.
South Dakota has no individual income tax brackets: The state result is $0 at every income level and for every federal filing status.
Federal taxes still apply: South Dakota residency does not eliminate federal income tax, federal payroll tax, or other federal tax obligations.
Retirement income is not taxed by South Dakota: South Dakota does not impose a state individual income tax on pensions, retirement account distributions, or Social Security benefits.
South Dakota vs Neighboring States
| State | Tax Year | Tax Rate | Rate Type |
|---|---|---|---|
| South Dakota | 2026 | None | No Individual Income Tax |
| Iowa | 2026 | 3.80% | Flat |
| Minnesota | 2025 | 5.35% - 9.85% | Progressive |
| Montana | 2025 | 4.70% - 5.90% | Progressive |
| North Dakota | 2025 | 0% - 2.50% | Progressive |
| Nebraska | 2026 | 2.46% - 4.55% | Progressive |
| Wyoming | 2026 | None | No Individual Income Tax |
Frequently Asked Questions (FAQ)
What is the South Dakota income tax rate for 2026?
The South Dakota individual income tax rate is 0% because South Dakota does not impose an individual state income tax.
Does South Dakota have income tax brackets?
No. South Dakota does not have individual income tax brackets because it does not impose an individual state income tax. Describing South Dakota as having a single 0% bracket would be misleading.
Do South Dakota residents file a state income tax return?
South Dakota residents generally do not file a South Dakota individual income tax return because the state does not impose an individual income tax. Residents may still need to file a federal income tax return.
Does South Dakota tax capital gains or investment income?
No. South Dakota does not impose a state individual income tax on capital gains, dividends, interest, or other investment income. Federal income tax rules may still apply.
Does South Dakota tax retirement income?
No. South Dakota does not impose an individual state income tax on pensions, distributions from retirement accounts, or Social Security benefits. Federal tax treatment depends on the type and amount of retirement income.
References:
- Individual Taxes. South Dakota Department of Revenue. Retrieved July 6, 2026.
- South Dakota Constitution, Article 11 - Revenue and Finance. South Dakota Legislative Research Council. Retrieved July 6, 2026.
- US Individual Income Tax Return Form 1040. Internal Revenue Service (IRS). Retrieved July 6, 2026.
- Instructions for Form 1040. Internal Revenue Service. Retrieved July 6, 2026.
- Instructions for Schedule A: Itemized Deductions. Internal Revenue Service. Retrieved July 6, 2026.
- IRS Tax Inflation Adjustments for Tax Year 2026. Internal Revenue Service. Retrieved July 6, 2026.
- One, Big, Beautiful Bill Provisions for Individuals and Workers. Internal Revenue Service (IRS). Retrieved July 6, 2026.
Last updated: July 6, 2026