Geothermal energy policies are critical tools in accelerating the deployment and adoption of geothermal power worldwide. As governments seek reliable, low-carbon, dispatchable energy sources, geothermal energy policies and incentives serve both to reduce financial barriers for developers and to provide long-term market signals. This article explores international frameworks, major country case studies, and emerging incentives shaping the future of geothermal power.
1. Why Geothermal Energy Policies Matter
Governments craft geothermal energy policies to address two uniquenesses of geothermal: high upfront costs for exploration and drilling, and relatively stable long-term outputs. Unlike solar or wind, geothermal offers round-the-clock baseload power, but exploration risk remains significant. As global energy demand grows and carbon emissions need urgent curbs, policymakers view geothermal as an essential piece of the clean energy puzzleand global forecasts predict dramatic ramp-up potential.
2. Major Policy Mechanisms
2.1 Feed‑in Tariffs & Premiums
Early innovations like Germany’s Renewable Energy Sources Act (EEG) included guaranteed feed‑in tariffs and preferential grid access for geothermal producers, with 20-year contracts and technology‑specific rates. The EEG design also included early starter bonuses for geothermal projects commissioned before 2016 [source]. Such schemes substantially reduced investor uncertainty.
2.2 Tax Credits & Production Incentives
In the U.S., the Energy Policy Act of 2005 allowed geothermal projects to qualify for production tax credits previously limited to wind and biomass (Section 45 PTC). The Inflation Reduction Act extended tax credits further and included geothermal under the new Clean Electricity Production and Investment Credits beginning in 2025.
Residential geothermal heat pumps are temporarily qualified for credits of up to 30%, but these are scheduled to phase out by 2025.
2.3 Loan Guarantees and Risk Mitigation Programs
The U.S. Geothermal Energy Research, Development, and Demonstration Act of 1974, later updated in the 1980s Geothermal Energy Act, established loan guarantee programs covering up to 90% of project costs and set up dedicated funding for insurance and technical assistance.
2.4 Research & Earthshot Initiatives
Federal efforts such as the Department of Energy’s “Enhanced Geothermal Shot” target cost reductions by 2035 through demonstration projects and funding. Coupled with infrastructure laws that allocate over $80 million to EGS development, such initiatives are vital for scaling next‑generation geothermal technologies.
3. Country Case Studies
United States
Despite policy shifts under recent administrations, U.S. geothermal retains some momentum. The Trump-era government rescinded several regulations and delayed loans, but maintained incentives for commercial geothermal projects. Mid‑2025 policy uncertainty remains high, but private sector investments—especially from tech giants—continue, driven by long‑term carbon goals. Demand for geoscientists and technical staff is also expanding rapidly.
Germany & European Union
Germany’s EEG established the world’s first feed‑in tariff system in 1991, scaling up to include geothermal, biomass, hydro, and PV by 2000. Though feed‑in tariffs have largely transitioned to auction‑based premium models, geothermal remains eligible for compensation and early development bonuses, reinforcing long-term investor confidence.
Indonesia & Philippines
Indonesia, home to nearly 40% of global geothermal potential, installed 2,356 MW by the end of 2022 and targets 9,000 MW by 2025. However, growth is hindered by unclear land regulation, coal subsidies, and feed‑in tariffs ranging from 6.5–12 US cents/kWh, which struggle to compete with cheaper conventional power.
4. Emerging Trends and Incentives
- Next‑generation geothermal systems like EGS are backed by Earthshot incentives, aiming for parity with wind and even nuclear power by 2035, with costs projected to decrease from $100–240/MWh down to $50–80/MWh.
- Geothermal greenhouses and residential programs, exemplified by Whisper Valley in Texas or Pagosa Springs in Colorado, showcase incentives for thermal use beyond electricity—though they face high upfront costs (~$40,000/year per home) and policy limitations.
- Clean Energy Investment Credits, enacted in 2025 under the IRA framework, now include geothermal, unlocking new capital sources for large projects.
5. Key Policy Recommendations
To accelerate geothermal development, governments and international agencies should:
- Offer stable and predictable feed‑in tariffs or premium contracts, especially for early-stage EGS and closed‑loop geothermal pilots.
- Maintain and expand tax credit regimes and loan guarantee programs that de-risk exploration.
- Support research, workforce development, and subsurface mapping, addressing technical talent gaps identified in recent analyses.
- Adopt integrated regulatory frameworks that streamline permitting, clarify land rights, and reduce implicit subsidies to coal or fossil‑fuel incumbents.
- Encourage cross‑sectoral uses, such as geothermal‑heated agriculture or district heating networks, via grants and demonstration funding.
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