South Dakota Tax Deadlines: Individual & Corporate Filing Guide

South Dakota Tax Deadlines: Individual & Corporate Filing Guide

Check South Dakota tax deadlines for individuals and C Corporations. Confirm due dates, extension rules, and exemptions for S Corps and Partnerships.

South Dakota does not impose an individual or corporate income tax, but businesses still face filing obligations.

South Dakota Tax Deadlines at a Glance (2026)

Entity Type

Filing Requirement

Due Date

Individuals

No filing required

N/A

Corporations

No income tax return

N/A

Businesses

Sales & Use Tax

Monthly / Quarterly

Financial Institutions

Bank Franchise Tax

April 15, 2026

Businesses

South Dakota relies heavily on sales, use, and excise taxes rather than income tax.

‹ Tennessee Tax Deadlines: Individual & Corporate Filing Guide

South Carolina Tax Deadlines: Individual & Corporate Filing Guide ›

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Monitoring Systems

24/7 intrusion detection

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Built on industry-leading standards to keep your clients’ data safe and your firm audit-ready.

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End-to-end Encryption

SOC 2 Type II

Monitoring Systems

24/7 intrusion detection
Quarterly scans & annual pen tests

Access Control

Multi‑Factor Authentication & Role‑based permissions

Regulation Compliant

TLS 256‑bit in transit & at rest
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Customer Stories

Trusted by firms across the board

"Research used to be a black hole. Now, I just type the question and get a citable IRS answer in seconds."

Tax Manager

Sama Tributa

"80% faster first drafts. What used to take us two days is now done in two hours."

Managing Partner

Northbridge Tax Advisory

Customer Stories

Trusted by firms across the board

"Research used to be a black hole. Now, I just type the question and get a citable IRS answer in seconds."

Tax Manager

Sama Tributa

"80% faster first drafts. What used to take us two days is now done in two hours."

Managing Partner

Northbridge Tax Advisory