Implementing the 45V Rule: What it Means for Green Hydrogen Projects

The US Treasury's final 45V guidance establishes a market-based framework for green hydrogen projects to qualify for tax credits based on three pillars: incrementality, temporality, and deliverability. The rule allows annual matching of clean power until 2030, after which hourly matching is required. It provides flexibility by allowing emissions calculations per hour and per electrolyzer, preventing an 'all or nothing' loss of credits. Developers can currently use bilateral contracts and existing registries to demonstrate viability to financiers, while preparing for a more sophisticated hourly Energy Attribute Credit (EAC) market.

• The 45V final rule maintains a 'three pillars' structure requiring producers to deliver clean power to hydrogen projects at the time of production to qualify for tax credits, focusing on incrementality, temporality, and deliverability.
• Regarding temporality, the guidance extends the use of annual matching until 2030, at which point all projects must transition to hourly matching.
• The final rule introduces flexibility in credit calculations, allowing emissions to be calculated separately for each hour and each electrolyzer; this ensures that projects do not lose the entire credit if they cannot cover the load for every hour.
• Incrementality requirements allow projects built up to 3 years before a hydrogen facility is placed in service to provide qualifying Energy Attribute Credits (EACs). Certain at-risk nuclear plants qualify if they had average annual gross revenue below 4.375¢/kWh in any two years between 2017-2021, or if they are merchant nuclear with 50%+ wholesale market sales (capped at 200 MW per reactor).
• California and Washington are currently the only states exempt from the incrementality standard because they possess decarbonization standards and emissions cap programs that serve as guardrails.
• The US framework provides more contracting flexibility than the EU because it does not require the physical bundling of power and EACs, allowing for unbundled EAC contracting structures.
• To secure financing, developers must demonstrate project viability upfront through power contracts, offtake agreements, and a compliance pathway to calculate potential revenue.
• While full hourly tracking registries are still maturing, first-movers can use bilateral hourly contracts for EAC ownership and monthly EACs combined with hourly production data for verification.

APA

RMI (2025). Implementing the 45V Rule: What it Means for Green Hydrogen Projects. https://rmi.org/resources/implementing-the-45v-rule-what-it-means-for-green-hydrogen-projects/

Chicago

RMI. Implementing the 45V Rule: What it Means for Green Hydrogen Projects. 2025. https://rmi.org/resources/implementing-the-45v-rule-what-it-means-for-green-hydrogen-projects/.

Wikipedia

{{cite report |author=RMI |title=Implementing the 45V Rule: What it Means for Green Hydrogen Projects |date=3 March 2025 |url=https://rmi.org/resources/implementing-the-45v-rule-what-it-means-for-green-hydrogen-projects/ |access-date=17 August 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{rmi2025implementing, author = {{RMI}}, title = {{Implementing the 45V Rule: What it Means for Green Hydrogen Projects}}, institution = {RMI}, year = {2025}, month = mar, url = {https://rmi.org/resources/implementing-the-45v-rule-what-it-means-for-green-hydrogen-projects/}, urldate = {2026-08-17}, note = {Indexed by Climate Insights Directory} }