South Dakota Clarified Dyed Diesel Usage Rules

Agricultural producers and non-agricultural users face new guidance on tax and exemption requirements.

Updated on Oct. 13, 2026 in Organic Food

Isometric editorial illustration of a weathered industrial fuel valve on a plinth, representing agricultural fuel regulatory standards in South Dakota. — The South Dakota Department of Revenue has issued updated guidance for agricultural producers regarding the proper usage and tax compliance of red dyed diesel fuel. AI Illustration. Upload story photo >

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The South Dakota Department of Revenue has issued new guidance clarifying the rules for on-road use of red dyed diesel fuel. The update impacts how agricultural producers and other motorists manage tax compliance within the state.

Why it matters

Clearer regulatory standards help South Dakota residents understand their tax obligations and potential liabilities when using specific fuel types. This clarification ensures agricultural producers correctly navigate their exemptions while alerting non-agricultural users to possible federal tax risks.

The guidance updates requirements under South Dakota Codified Law 10-45-19, which governs how agricultural exemptions are applied. It remains unclear how state revenue agents will track non-agricultural users who may owe federal taxes.

The players

South Dakota Department of Revenue

The state agency responsible for administering tax laws and issuing regulatory guidance to residents and businesses.

The details

Red dyed diesel is chemically marked for off-road use and is exempt from certain federal excise taxes. The state clarified that to legally use this fuel on public roads for agricultural purposes, producers must hold a valid agricultural exemption certificate. Users are still responsible for all applicable state sales taxes and municipal taxes regardless of their exemption status.

October 8, 2026: The South Dakota Department of Revenue issued a press release to clarify usage requirements.

Health Landscape

This guidance serves as an administrative update to South Dakota Codified Law 10-45-19 regarding fuel-based tax exemptions. It aligns local usage protocols with broader systems designed to distinguish between agricultural and commercial fuel consumption.

If you operate machinery or vehicles using dyed diesel, verify that your agricultural exemption certificate remains valid and current. Those using this fuel for non-agricultural purposes should consult with a tax professional to discuss potential federal tax liabilities.

The takeaway

Regulations regarding fuel use are designed to ensure consistent tax compliance across the state. If you are unsure about your specific exemption status, verify your documents with the state or consult a financial professional to avoid unexpected liabilities.