But the text would still slash many of the signature programs of the Inflation Reduction Act. It would be particularly damaging for Republicans’ goals of creating a domestic mining industry, because it kills incentives for refining critical minerals while yanking away subsidies for the electric cars and wind turbines that might use those minerals.
Consumer tax credits for energy efficiency upgrades, including heat pumps, would still be terminated, as would credits for homeowners to lease or purchase rooftop solar. The Senate bill also cuts a tax deduction for energy efficiency upgrades in commercial buildings one year after the bill’s passage, which was not in the House version.
There was no mercy for the IRA’s tax credit to produce clean hydrogen, despite a last-minute appeal from more than 250 organizations in early June. That policy would still be terminated this year.
Here’s a rundown of the rest of the major changes.
No EV carveout for 2026
Like the House bill, the Senate’s proposal would terminate tax credits for new, used, and leased electric vehicles. But while the House had extended the program by one year for automakers that had yet to sell 200,000 eligible vehicles, the Senate version would simply end the program in 180 days — or roughly six months — after the bill’s passage.
Depending on when the bill is passed, the Senate version could work out better for some experienced EV automakers, such as Tesla and General Motors. These automakers are set to lose their eligibility for tax credits on December 31 under the House text. But the Senate bill’s 180-day period could allow them to eke out another month or so of eligibility — especially if congressional negotiations over the One Big, Beautiful Bill Act go late into the summer.
Newer EV automakers, such as Rivian or Lucid, come out worse under the Senate text as compared to the House bill since they haven’t sold as many vehicles.
Homeowners interested in electric vehicle chargers would get a longer runway than the House had proposed — but a much shorter one than is on the books right now. Under current law, homeowners can claim the charger tax credit through 2032. The Senate version would terminate the 30% tax credit for installing a home charger one year after the bill is enacted.
“Clean, firm” is in, wind and solar are (mostly) phasing out
The Inflation Reduction Act achieved massive greenhouse gas reductions by including a set of new “technology-neutral” tax credits that subsidized any new power plant as long as it didn’t emit carbon dioxide. Under current law, these new tax credits will remain effective and on the books for decades to come — expiring only when emissions from the country’s power sector fall about 95% below their all-time high.
The Republican reconciliation bills have dismantled these provisions. The House text proposed immediately winding down tax credits for all clean energy sources — except nuclear — and allowed just a 60-day “grace period” for new projects to start construction to claim the credits. Even then, new power plants would have to enter service by 2028 to qualify.
Senate Republicans have countered with a plan that is designed to maintain support for every electricity source that isn’t wind and solar. The GOP Senate caucus favors technologies that can provide power on demand around the clock — such as geothermal, nuclear, hydropower, and batteries — but technically the Senate text allows any zero-carbon, non-solar, non-wind source to qualify for the clean electricity tax credits for the next decade.
The Senate draft erases the provision in the Inflation Reduction Act that would have kept these tax credits in place until the entire United States power sector reduces its emissions. Instead, it adopts the IRA’s alternate phase-out period, with the tax credits beginning to wind down for projects that start construction in 2034.
Tax credits for wind and solar, however, would begin to phase down for projects that start construction next year, and terminate after 2027, with one big exception.
An odd addendum to the wind and solar phase-out would exempt projects that are at least 1 gigawatt, are at least partially on federal land, and have already received a “right-of-way grant or lease” from the Bureau of Land Management as of June 16. It’s unclear which, if any, projects would be helped by this provision. According to the BLM website, it has not granted a right-of-way to any projects that are 1 gigawatt or larger except for the Lava Ridge wind farm, which has been canceled. If the Senate changes the date, however, the Esmeralda 7 solar farm in Nevada may benefit, as the project is more than 6 gigawatts, and is in the final stages of its environmental review.
The existing nuclear tax credit is safe, with more limits on fuel sourcing
The Senate text would not do anything to change the eligibility timeline for existing nuclear plants to claim a tax credit, called 45U, designed to keep them solvent. It would keep the schedule written into the Inflation Reduction Act, which has the credit terminating at the end of 2031. It would, however, impose new foreign sourcing restrictions on nuclear fuel, forbidding existing power plants from claiming the tax credit if their fuel comes from Russia, China, Iran, or North Korea. (It makes an exception for power companies that signed a long-term contract to buy foreign fuel before 2023.) The United States formally banned the import of nuclear fuel from Russia last year.
Advanced manufacturing subsidy changes are friendlier to batteries — but deadlier for critical minerals
The Inflation Reduction Act subsidized the production of certain clean energy equipment — including solar panels, wind turbines, inverters, and batteries — as well as some of their subcomponents. Under current law, those tax credits will begin to phase out by 25% increments in 2030, so companies can claim 75% of the credit in 2030, 50% in 2031, and zero in 2033.
The IRA also created a new permanent tax credit that covered 10% of the cost of refining or recycling critical minerals.
The new Senate text changes these phase-out deadlines, often for the worse. First, as in the House bill, wind turbines and their subcomponents would no longer qualify for the tax credit starting in 2028. Second, the tax credit for critical minerals would start phasing out in 2031. Under the new calendar, companies would be able to claim 75% of this credit in 2031, 50% in 2032, and zero in 2034.
In practice, this means that the Senate GOP text would end the IRA’s permanent tax credit for producing many critical minerals, which would damage the financial projects of many mineral processing and refining projects. Other types of equipment remain on the Inflation Reduction Act’s original phase-out schedule.
The new Senate text also slightly expands the type of battery components that qualify for the credit. And — in a potentially significant change for some companies — it forbids companies from stacking tax credits for their vertically integrated production process starting in 2027.
Parity for enhanced oil recovery
While the House did not touch the tax credit for carbon sequestration, the Senate has put forward a key change favored by many proponents of the technology. Under current law, project operators get the highest-value credit if they simply inject captured carbon underground for no other purpose than to keep it out of the atmosphere. Smaller amounts are available for projects that use captured CO2 to nudge more oil out of the ground, also known as “enhanced oil recovery,” or if they use the CO2 in products like cement.
Under the Senate proposal, all carbon sequestration projects, no matter the nature of the carbon storage, would qualify for the same amount.
Complicated new rules around China sourcing
The biggest clean energy killer in the House-passed bill was a strict sourcing rule for the tax credits that would disqualify projects that use any component, subcomponent or mineral from China. As Heatmap’s Matthew Zeitlin wrote last week, the rules appeared “unworkable” to many companies because they seemingly disqualified projects even if they used a relatively small amount of an otherwise irrelevant Chinese-sourced material — such as a spare bolt or a gram of steel.
Under the House bill, manufacturers would also not be allowed to license a Chinese company’s technology. This measure appeared to directly target Ford, which has proposed manufacturing electric vehicle batteries using technology licensed from the Chinese firm CATL, one of the world’s best producers of EV batteries.
The Senate proposal changes the House provision by adding a complicated new set of definitions about what might qualify as a federal entity of concern. It also introduces a new “safe harbor” formula describing the amount of Chinese-sourced material that can keep a project from receiving a tax credit. We’re still figuring out how these new rules work together, and we’ll update this article as we understand them better.
Transferability is back — with a twist
The House bill also would have severely curtailed a crucial component of the tax credit program called transferability, which allowed developers that couldn’t take full advantage of the subsidies to sell their credits for cash to other companies. The text stripped this option from the tax credits for clean manufacturing (45X), carbon sequestration (45Q), and clean fuels (45Z) beginning in 2028. Without transferability, most carbon sequestration projects will struggle to pencil out, my colleague Katie Brigham reported.
The Senate proposal would restore transferability for the duration of all remaining tax credits.
But it throws another wrench in plans to scale up nuclear, geothermal, and other large capital-intensive projects, because it restricts zero-carbon power plants’ ability to use modified accelerated cost recovery to fund their projects.
Corn ethanol prevails
The Inflation Reduction Act created a technology-neutral tax credit for low-carbon transportation fuels, like sustainable aviation fuel and biodiesel (45Z). This was the only tax credit that the House GOP had proposed extending, giving projects four more years to qualify. The House bill also said that producers did not have to account for indirect land-use changes as a result of turning crops into fuel — a provision that would enable the corn ethanol industry to claim the credit.
The Senate proposal retains both of those provisions, but reduces the credit amount by 20% for fuels produced from feedstocks sourced from outside the United States. It also introduces a new rule that would prohibit companies from claiming their fuel has a “negative emissions” rate — which some environmental groups warn would subsidize established technologies and distort the market. Proponents of several forms of biomethane have tried to claim they are net-negative because they prevent methane emissions that would have otherwise happened — like when methane is captured from landfills or manure pools.
Confusingly, though, the text makes an exception, allowing negative emissions rates for fuels made from manure — which is the feedstock environmental groups are most concerned about.
This article was updated on June 17 to include the breakdown of 45Z.
Courtesy of Climeworks
IEA
