Iowa creates tax break for high-ethanol fuel in farm equipment

Iowa Gov. Kim Reynolds on June 1 signed Senate File 2493, giving ethanol-blended gasoline with more than 85% ethanol a tax break when it is bought at a terminal or refinery rack and used exclusively in agricultural equipment. The law exempts those blends from the state motor vehicle excise tax, a narrow but notable step that puts very high-ethanol fuel on a more favorable footing as Iowa looks to move ethanol beyond road vehicles and into the farm fleet.

The bill cleared the Iowa Senate unanimously on April 22 and passed the Iowa House 85-1 on May 2 before reaching Reynolds’ desk. It takes effect July 1. The statute applies to fuel used only in an “implement of husbandry” in agricultural production, language that aims squarely at tractors and other farm machinery rather than highway use.

Reynolds highlighted the policy at a State Capitol ceremony, pointing to John Deere’s E98 ethanol prototype 8R tractor as an example of where the market could go. Brownfield Ag News reported that John Deere Ag and Turf Division president Deanna Kovar said the prototype has 350 horsepower. Deere has said work on the platform began in 2020, and the tractor was shown publicly at Commodity Classic 2026, where it drew attention from farmers and ethanol backers in San Antonio, Texas.

The tax incentive matters because it directly addresses one piece of the adoption puzzle, fuel cost. For growers, the larger question is whether the savings are enough to offset the harder barriers that still define this market: whether equipment is approved for high-ethanol blends, whether OEM warranties hold, whether fuel can be sourced reliably at the rack, and whether the economics make sense for operators with tight margins and existing diesel infrastructure. Iowa has now put a state tax preference behind the concept, but the commercial test will come when farm equipment owners decide whether to fuel up.