Geothermal energy is emerging as a cornerstone of the global renewable energy transition. Unlike solar and wind, which are intermittent, geothermal power provides baseload electricity with high capacity factors. For investors and policymakers, understanding the current market dynamics, technological shifts, and long-term economic outlook is essential to capitalizing on this resource. This article provides a comprehensive analysis of geothermal energy market trends and investment forecasts through 2035.

The global geothermal market has grown steadily, with installed capacity surpassing 16 GW as of 2025. Growth is concentrated in countries with high-temperature geothermal resources, such as the United States, Indonesia, Philippines, Turkey, and Kenya. According to the International Renewable Energy Agency (IRENA), geothermal power generation increased by approximately 4% in 2024, with new projects coming online in East Africa and Southeast Asia.

Technological Innovations Driving Expansion

Traditional hydrothermal plants tap into naturally occurring hot water or steam. However, recent breakthroughs in enhanced geothermal systems (EGS) and binary cycle technology are opening up vast new resource areas. EGS uses hydraulic stimulation to create fractures in hot dry rock, effectively engineering a reservoir where none existed. This technique could potentially access more than 100 GW of electricity in the United States alone, according to the U.S. Department of Energy.

Binary cycle plants, which use a secondary fluid with a lower boiling point, allow geothermal power generation from lower-temperature reservoirs (below 150°C). This expands the viable resource base to regions previously considered non-economic, such as parts of Europe and the western United States.

Key Market Drivers

  • Decarbonization goals: Over 140 countries are targeting net-zero emissions, making firm, clean baseload power highly attractive.
  • Energy security concerns: Geothermal reduces reliance on imported fossil fuels, a priority after geopolitical disruptions in energy markets.
  • Decreasing levelized cost of electricity (LCOE): The cost of geothermal power has fallen 25% over the past decade, now averaging $40–80 per MWh for new plants.
  • Government incentives: Tax credits (e.g., the U.S. Inflation Reduction Act), feed-in tariffs, and direct grants are underwriting early-stage exploration and development.
  • Corporate off-take: Tech giants like Google and Microsoft are signing long-term power purchase agreements (PPAs) for geothermal energy to meet 24/7 clean energy requirements.

Regional Market Analysis

North America

The United States remains the world’s largest geothermal producer, with 3.9 GW of installed capacity in 2025. Major projects under development include the 400 MW Cape Station project in Utah and expansion of the Geysers complex in California. Canada is emerging with early-stage projects in British Columbia and Alberta, supported by federal clean energy funds.

Asia-Pacific

Indonesia has the largest geothermal potential globally (estimated at 29 GW) but has only developed around 2.4 GW. The government aims to add 7.2 GW by 2030 through auction rounds and streamlined permitting. The Philippines, with 1.9 GW, is a mature market and is now retrofitting older plants to increase efficiency. Japan restarted its geothermal sector post-Fukushima, with small-scale binary plants and subsidies for community projects.

Africa

Kenya is Africa’s geothermal leader with over 950 MW online and plans to reach 5 GW by 2030 by developing the Menengai and Olkaria fields. Ethiopia and Djibouti are attracting multilateral financing from the World Bank and African Development Bank for exploration drilling.

Europe

Europe’s geothermal sector is dominated by direct heating (Iceland, France, Germany, Italy). However, electricity production is growing through EGS pilot projects in the Upper Rhine Graben (France/Germany) and the Cornwall geothermal project in the UK. The EU’s REPowerEU plan explicitly supports geothermal as a strategic energy source.

Economic Forecasts for Geothermal Investments

The global geothermal electricity market is projected to grow from $8.5 billion in 2024 to over $24 billion by 2035, representing a compound annual growth rate (CAGR) of roughly 10%. This forecast is driven by the combination of mature hydrothermal development and commercial-scale EGS deployment.

Investment Opportunities

Key segments attracting capital include:

  • Exploration and resource confirmation: Often the riskiest stage, but essential. Companies offering advanced geoscience tools (seismic, magnetotellurics) and drilling services are seeing increased demand.
  • Plant construction and EPC: Turbine manufacturers (Ormat, Siemens) and engineering firms benefit from new build and retrofit contracts.
  • Direct use heating and cooling: Geothermal heat pump installations in buildings are growing 15% annually in Europe and North America.
  • Lithium extraction: Geothermal brines often contain lithium. Several projects are combining power generation with direct lithium extraction (DLE) to supply the EV battery supply chain.

Cost Projections and Levelized Cost of Electricity

As EGS and binary tech mature, the LCOE for new geothermal plants is expected to drop to $35–60 per MWh by 2030 (based on IRENA cost analyses). This would make geothermal competitive with combined-cycle natural gas and solar-plus-storage. Including revenue from capacity payments and renewable energy certificates improves project economics further.

Challenges and Risks

Even with favorable trends, geothermal investments carry distinctive risks:

  • High upfront capital: A 50 MW plant costs $200–350 million to develop, with 30–40% of that spent on drilling before any revenue is generated.
  • Resource uncertainty: Only one in four exploration wells becomes a commercially viable producer. Advanced geophysics can reduce, but not eliminate, this risk.
  • Permitting delays: Environmental assessments, water rights, and land access can stall projects for years, particularly in frontier regions.
  • Induced seismicity: EGS projects have faced public opposition after minor earthquakes, such as the 2017 Pohang incident in South Korea. Stringent monitoring protocols now mitigate this risk.
  • Competition from low-cost renewables: Solar and wind costs have fallen to $20–30 per MWh, pressuring geothermal to deliver additional value through baseload reliability and ancillary services.

Policy and Regulatory Landscape

The pace of geothermal adoption is heavily influenced by government actions. In the United States, the Inflation Reduction Act extended the Production Tax Credit (PTC) for geothermal at $26/MWh and created a standalone tax credit for EGS. The EU’s Energy Taxation Directive includes geothermal in favorable tariff categories. Developing nations rely on concessional finance and risk mitigation instruments like the World Bank’s Global Geothermal Development Plan to de-risk early-stage drilling.

On the downside, countries with subsidies for fossil fuels or centralized electricity markets (e.g., India, China) still allocate less than 1% of renewable funding to geothermal. Advocacy groups are pushing for inclusion in upcoming renewable portfolio standards (RPS) and green bond frameworks.

Future Outlook and Strategic Recommendations

Geothermal energy is poised to play a pivotal role in achieving a fully decarbonized power system by 2050. The International Energy Agency (IEA) estimates that geothermal could provide 3.5% of global electricity by 2050, up from less than 1% today, if EGS becomes commercial at scale. Key strategies for investors include:

  • Investing in diversified early-stage portfolios across multiple resource basins to spread exploration risk.
  • Partnering with oil and gas operators who own downhole expertise and data from existing wells (repurposing dry or marginal wells for geothermal).
  • Focusing on markets with clear policy support, transparent permitting, and available transmission infrastructure.
  • Exploring co-production of electricity and heat for district heating or industrial processes to improve project revenue.

The combination of technological progress, declining costs, climate urgency, and energy security needs creates a compelling case for geothermal energy investments. While challenges remain, the sector offers long-term stable returns and a unique position in the clean-energy mix for those who act early and manage risks carefully.