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Illinoiscorporate tax inSouth Dakota
No Corporate Income Tax — 0% rate (some impose a gross receipts tax instead)

South Dakota

Top Rate
None
Rate Structure
None
Franchise Tax
No
Gross Receipts Tax
No
S-Corp Recognized
Yes

Corporate Income Tax Rate at a Glance

South Dakota imposes NO CORPORATE INCOME TAX on C-corporations. South Dakota's rate structure is classified as "None" for purposes of this comparison.

Rate Structure (Flat vs. Graduated)

South Dakota has no corporate income tax and no corporate franchise tax. A separate Bank Franchise Tax applies to financial institutions only at 6% (graduated above $400 million in net income).

S-Corp & Pass-Through Treatment

S-corps, partnerships, and LLCs are not subject to South Dakota corporate income tax (since none exists). South Dakota also has no individual income tax, so pass-through income is generally not taxed at the state level.

Official State Revenue Department

For current corporate tax rules in South Dakota, consult the state's official source at https://dor.sd.gov/businesses/taxes/. Rates and rules change annually — verify with a qualified tax professional before taking any action.

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Related guides

South Dakota Department of Revenue: https://dor.sd.gov/businesses/taxes/
Law last updated: 2025Row last reviewed: Apr 26, 2026

Corporate income tax rates change frequently as states enact reform packages and phase-down schedules. Always verify current rates with the state's department of revenue and your tax advisor before making business decisions. This information is for educational purposes only and is not tax or legal advice.