The U.S. Senate has passed a revised budget bill slashing the eligibility period for the 45V clean hydrogen production tax credit, trimming it from 2033 to the end of 2027. While the original Inflation Reduction Act granted hydrogen developers over a decade to break ground and claim up to $3/kg in federal support, the new bill requires construction to begin by January 1, 2028. The compromise measure comes after intense partisan negotiation and a tie-breaking vote cast by Vice President JD Vance.