FiscalCalc

2026 Tax Bracket Calculator — South Dakota

South Dakota has no state income tax. Your only income tax obligations are federal brackets. Calculate your exact marginal and effective federal tax rate below.

South Dakota State Income Tax — 2026 Summary

0%
Top State Rate
$62,000
Median Income
95
Cost of Living

No state income tax

$

Your total income before any deductions or taxes

South Dakota Tax Brackets Explained (2026)

South Dakota is one of the nine US states with no state income tax. Residents only pay federal income tax and FICA payroll taxes. This makes South Dakota attractive for high earners — a $200,000 income that would face 9–10% state tax in California or New York faces zero additional state burden here.

The median household in South Dakota earns $62,000/year. At that income (single filer), the federal effective rate is approximately 12–14%, bringing total income tax (federal + state) to roughly 12–14%.

How Marginal vs. Effective Rate Works

The marginal rate is the rate on your last dollar of income — it does not apply to all income. The effective rate is your total tax divided by total income. For example, someone earning $100,000 in South Dakota has a 22% federal marginal rate but an effective federal rate of roughly 15%, because the first $44,725 (2024) is taxed at 10% and 12%, not 22%.

Frequently Asked Questions — Tax Brackets in South Dakota

What is the state income tax rate in South Dakota?+
South Dakota has no state income tax — one of only 9 states with this benefit. Residents pay only federal income tax (10%–37%) and FICA payroll taxes (7.65%). This makes South Dakota particularly advantageous for high earners.
What is the effective tax rate for a median earner in South Dakota?+
The median household income in South Dakota is $62,000. At that income (single filer, standard deduction), the federal effective rate is approximately 12–14%. Since South Dakota has no state income tax, total income tax burden is roughly 12–14% plus 7.65% FICA.
Does South Dakota tax retirement income?+
No state income tax. Since South Dakota has no state income tax, all retirement distributions — Social Security, pension, 401(k), and IRA withdrawals — are exempt from state tax.
How do South Dakota's taxes compare to other states?+
South Dakota's state income tax rate of 0% (no income tax) and cost of living index of 95 place it among the more tax-friendly states nationally. The median household income of $62,000 affects how burdensome the overall tax structure is for typical residents.
What tax deductions are available to South Dakota residents?+
South Dakota residents can claim all standard federal deductions — the 2025 standard deduction is $15,000 (single) or $30,000 (married). Pre-tax contributions to 401(k), HSA, and FSA accounts reduce taxable income. Since South Dakota has no state income tax, only federal deductions apply. Homeowners can deduct mortgage interest and up to $10,000 SALT (state/local taxes) federally.

Data Sources & Methodology

Federal tax brackets from IRS Revenue Procedure 2024-61 (2026 adjustments). State income tax rates from Tax Foundation. Retirement tax treatment from state revenue department publications. Median income from U.S. Census Bureau ACS. Last updated 2026.

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