South Dakota State Tax Guide
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South Dakota State Tax Guide
South Dakota does not levy a state personal income tax. Federal deadlines apply.
Extension rules
Extension type: Automatic — no action required
No state personal income tax return required in South Dakota. Federal extension rules apply for your IRS return.
South Dakota Key deadlines (tax year 2025, return filed in 2026)
- Filing deadline: Apr 15, 2026
- Extension request deadline: Apr 15, 2026
- Extended return deadline: Oct 15, 2026
- Payment deadline: Apr 15, 2026
Estimated payments
South Dakota has no state personal income tax. Deadlines shown are federal.
Payment rules
South Dakota does not collect personal income tax on wages, so there is no state balance to pay. Federal payments go to the IRS.
Payment options
South Dakota Refund Tracking
Processing time: Federal IRS timelines apply
Do I need to file?
South Dakota has no personal income tax on wages, so no state income tax return is required for wage income.
- Residents: No individual state income tax filing required.
- Part-year residents: Not applicable — South Dakota has no personal income tax.
- Nonresidents: Not applicable — South Dakota has no personal income tax.
Official filing requirements — South Dakota Department of Revenue
Thresholds change annually. Confirm your situation against current South Dakota Department of Revenue guidance.
Filing methods
- No state income tax return required — file your federal return only
