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A GreenBuildingAdvisor report published Oct. 6, 2026, describes bipartisan efforts to support geothermal energy, led by the Geothermal Energy Advancement Act, H.R. 5631. The report says geothermal retained access to key federal clean-energy tax credits under the One Big Beautiful Bill Act, but it does not provide the bill’s provisions, legislative status or a vote schedule.
A bipartisan effort in Congress is advancing proposals to support geothermal energy production, with the Geothermal Energy Advancement Act, H.R. 5631, identified as the leading measure in a GreenBuildingAdvisor report published Oct. 6, 2026. The development could affect investment in a renewable power source that, unlike wind and solar, was largely spared changes to federal clean-energy tax credits under the One Big Beautiful Bill Act.
The report says H.R. 5631 combines six previously proposed bipartisan bills focused on geothermal. It describes the measure as the most notable part of a broader set of legislative efforts, but the available source text does not list the six proposals or explain what provisions the combined bill would enact. It also does not establish whether the bill has advanced through a committee, received a floor vote or become law.
The tax-credit framework provides a separate source of policy support. According to the report, the law left geothermal largely unaffected by the changes to the 45Y clean electricity production credit and 48E investment credit. The article contrasts that treatment with tighter timelines for wind and solar projects seeking the 45Y credit: projects breaking ground after July 5, 2026, must be serviceable by the end of 2027 to qualify, according to its account.
For technologies other than wind and solar, the report says projects must begin construction before 2033 to claim the full credit, with incentives phasing down afterward. The article frames that comparatively longer window, alongside the proposed bills, as favorable to geothermal development. The source does not provide estimates of how much new capacity the legislation or tax incentives would produce.
A Longer Runway for Geothermal Investment
Geothermal projects can depend on substantial upfront development and drilling, so the duration and predictability of tax incentives may matter to companies weighing capital commitments. The report attributes to Geothermal Rising the view that stable incentives can help developers invest and utilities include geothermal in resource plans. That is an advocacy group’s assessment, not evidence in the source that particular projects have secured financing or been built because of the credits.
The bipartisan legislative effort matters because it suggests lawmakers from both parties are considering additional support for the sector even as federal policy narrows incentives for some other renewable technologies. If the proposals advance, they could shape the rules or resources available to geothermal developers. The source, however, provides neither bill text nor quantified forecasts, so the practical effects cannot yet be assessed.
For electricity customers and utilities, geothermal is relevant as a potential source of round-the-clock clean power, a benefit emphasized by the industry group. Whether expanded production can deliver power at competitive prices and at meaningful scale is not answered in the report. Those outcomes depend on project economics, geology, permitting and the eventual terms of any enacted policy.
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Tax Credit Rules and Earlier Support
The report places the new legislative push against changes made by the One Big Beautiful Bill Act, which it says became law in 2025. The law set different timelines for the 45Y and 48E credits across technologies. As described in the article, wind and solar face earlier deadlines under 45Y, while qualifying projects using other technologies have a longer period to claim full incentives.
Geothermal’s treatment was not presented as a newly enacted exemption in October 2026. Rather, the report says the technology was largely spared when the law altered tax-credit timelines for wind and solar. It also cites a July 2025 statement from Geothermal Rising, a nonprofit advocacy organization, welcoming the stability it said the framework offered the industry.
Enhanced geothermal systems are part of the report’s focus. These systems aim to expand geothermal development beyond locations where naturally accessible underground heat and fluid conditions make conventional projects viable. The source says increased development could help the resource grow, but does not provide technical performance data or project-specific results.
“This framework delivers the long-term certainty our industry has pursued for years.”
— Geothermal Rising executive director, in a July 2025 press release
Bill Details and Votes Remain Unclear
The source identifies H.R. 5631 and says it brings together six earlier bipartisan proposals, but the available material does not describe the bill’s specific measures, sponsors, committee referrals or legislative timetable. It is therefore unclear what changes developers would receive if it passes, or whether lawmakers have agreed on a final text.
The report also does not give projected costs, new geothermal capacity targets, expected job numbers or an estimate of how much investment the proposals might attract. The tax-credit deadlines and phase-down described in the article are not accompanied here by statutory citations or further detail about eligibility. The scope of any future changes, and how they would interact with existing credits, remains uncertain.
Watch for Committee Action and Bill Text
The next developments to track are publication or release of the bill’s detailed text, committee consideration and any scheduled House vote. Those steps would clarify which of the six earlier proposals were included and whether the measure has a realistic path forward. The source does not report a hearing date or legislative calendar.
Developers, utilities and policymakers will also be watching how the 45Y and 48E rules apply to geothermal projects as construction deadlines approach. Any assessment of the bill’s likely impact will require confirmed provisions, legislative progress and project-level information. Until those details are available, the confirmed development is the bipartisan push itself, not a change in law or a guaranteed expansion of geothermal production.
Key Questions
What is the Geothermal Energy Advancement Act?
It is H.R. 5631, which the GreenBuildingAdvisor report describes as a bipartisan measure combining six earlier bills focused on geothermal. The available source does not detail its provisions.
Has the bill become law?
The report does not say that it has become law or provide a vote result. Its legislative status and timetable are not specified in the source material.
What federal tax credits does the report discuss?
It discusses the 45Y production tax credit for clean electricity and the 48E investment credit. The report says geothermal was largely spared changes to these incentives under the One Big Beautiful Bill Act.
Why is geothermal being discussed alongside wind and solar?
The report contrasts the tax-credit deadlines for wind and solar with the longer eligibility window it describes for other technologies, including geothermal. It also cites the potential for geothermal to provide round-the-clock clean power, an industry argument rather than a confirmed outcome of the proposed legislation.
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