Taxpayers for Common Sense (TCS) submitted comments to the Environmental Protection Agency on the supplemental proposed rule.

“Renewable Fuel Standard (RFS) Program: Standards for 2026 and 2027, Partial Waiver of 2025 Cellulosic Biofuel Volume Requirement, and Other Changes; Supplemental Notice of Proposed Rulemaking.”

The federal Renewable Fuel Standard (RFS) program requires companies to blend a certain amount of biofuels with U.S. transportation fuel each year. The RFS was established in 2005, greatly expanded in 2007, and continues today despite its failure to benefit consumers, the farm economy, the environment, or taxpayers.

In its latest September 2025 rulemaking, EPA proposed a reallocation of a portion of the mandate exempted for small fuel refiners, meaning large fuel refiners would be forced to make up the difference. If finalized, this proposal will increase annual mandates for biofuel consumption, which may increase biofuel production and cause more harm to consumers, taxpayers, and the environment.