Hook: The Heat Beneath Your Feet is Worth Billions
Right now, somewhere under Iceland, Indonesia, and California, vast reservoirs of heat are just sitting there. Yet geothermal energy still makes up less than 1% of global electricity generation. Here’s the thing — global geothermal power capacity reached 17,173 MW by year-end 2025, but that number barely registers next to wind and solar. The real story isn’t what geothermal can do now. It’s why geothermal energy become bigger in the next few years — and why that matters for how we solve the clean energy puzzle.
You’ve probably heard the pitch before: geothermal is baseload, reliable, and doesn’t rely on weather. All true. But the reason geothermal energy become bigger has less to do with those boring facts and much more to do with a confluence of three things happening right now. Next-generation drilling tech is finally working. Money is flooding in. And data centers need power — a lot of it.
How Geothermal Energy Become Bigger: The Tech Revolution that Actually Works
In 2025, Eavor brought its first commercial closed-loop pilot project online, while Fervo Energy continued progress toward its first commercial-scale EGS power plant in Utah, scheduled to begin operations in 2026.
This is the real pivot point. For decades, geothermal was stuck in places where nature handed you a gift — Iceland, the Philippines, Indonesia. You drill straight down into steam. Done. But advanced geothermal technologies, including Enhanced Geothermal Systems (EGS) and closed-loop or Advanced Geothermal Systems (AGS), are not yet reflected in installed capacity statistics.
The catch? When these technologies do start showing up in the numbers, the curve could bend. Why geothermal energy become bigger comes down to a simple truth: we figured out how to create geothermal reservoirs almost anywhere. You don’t need to live on a fault line anymore.
I spent an afternoon last year talking with a drilling engineer about EGS, and he kept using the word “repeatable.” That stuck with me. Before, each geothermal project felt like a one-off. Now they’re thinking about standardization, cost curves, predictability. That’s when an energy source stops being a curiosity and starts becoming infrastructure.
Why Geothermal Energy Become Bigger is a Numbers Game
The geothermal electricity market will grow from $8.58 billion in 2025 to $9.36 billion in 2026 at a compound annual growth rate (CAGR) of 9.1%. That’s not a typo — 9.1% year-over-year. Still modest compared to solar’s explosive growth, but steady. And steadiness compounds.
Here’s why that matters for you. On average, global geothermal capacity had a utilisation rate over 75% in 2023, compared with less than 30% for wind power and less than 15% for solar PV. Translation: a geothermal plant runs hard all day. Wind turbines and solar panels are fair-weather workers. When you need grid stability, not flashy headlines, you call geothermal.
With nearly 14 gigawatts (GW) of prospective geothermal power capacity worldwide, the globe could see a nearly 100% increase of total operating capacity within the next decade. That’s the pipeline. That’s why investors are suddenly paying attention.
Government Funding Wants Geothermal Energy Become Bigger Fast
Cold hard cash is the truest measure of belief. The U.S. Department of Energy (DOE) announced a funding opportunity of $171.5 million to support next-generation geothermal field-scale tests for both electricity generation and exploration drilling to support characterization and potential confirmation of promising geothermal prospects.
February 2026. Just a few months ago. That’s not some buried paragraph in a lengthy bill. That’s a direct bet on the future.
But here’s the angle nobody talks about: Governor Gavin Newsom signed a budget agreement that includes targeted funding for geothermal exploratory wells, which are essential to developing next-generation geothermal projects in the state. California. The place that sets energy policy for half the country. They’re putting money where their mouth is.
Why does government funding matter? Geothermal drilling is expensive. It’s risky. You drill 3 kilometers down and sometimes find nothing. The private sector won’t touch that risk alone. But when the DOE says we’ll share that burden, suddenly 2026 projects that were sitting in pitch decks become actual drilling campaigns.
The Data Center Problem that Geothermal Energy Become Bigger to Solve
Kenya, Indonesia, the Philippines, and Taiwan are slated to see large growth in geothermal capacity related to the data center sector, with policies that support permitting creating demand, showing an emerging trend of tech companies adopting geothermal as a renewable way to power growing AI demands globally.
Tech companies need baseline power. Not sometimes, not when it’s sunny. Always. AI data centers in Nevada, planned facilities in Indonesia — they’re signing multi-decade power purchase agreements with geothermal projects. This is the opposite of a subsidy-driven market. This is raw demand.
One major tech company I heard about contacted a geothermal developer last year: “We need 100 MW, firm power, for the next 30 years.” That’s the conversation happening now. Not whether geothermal can work. Whether they can build it fast enough.
Here’s where it gets interesting: geothermal energy become bigger not because climate advocates demanded it, but because someone needed the power and geothermal was the only option that checked every box. That’s how infrastructure actually gets built.
The Cost Problem Nobody Wants to Admit
Look. Geothermal still costs more per megawatt than solar. While technological advancements are decreasing the cost of geothermal power as a baseload power source, the cost and the long construction timeline still hinder growth.
You can build a solar farm in 18 months. A geothermal project? Three to five years minimum. The upfront drilling risk is brutal. Honestly, this is why geothermal never scaled like solar did. Solar has Moore’s Law working for it. Geothermal has physics.
But — and this is important — why geothermal energy become bigger has nothing to do with it getting cheap faster. It’s about it being the only option that works for specific, high-value use cases. Data centers. Deep-load industrial heat. Baseload power in grids drowning in wind and solar variability.
The economics don’t need to flip. They just need to be good enough. And right now, for the first time, they are.
Who’s Winning and Who’s Still Waiting
The United States continues to lead the operation and expansion of geothermal power. But the global picture is messier. The U.S. leads with ~3,900 MW, followed by Indonesia (~2,400 MW), the Philippines (~1,900 MW), and Turkey (~1,700 MW).
Indonesia and the Philippines both have massive geothermal resources and a desperate need for power. Turkey’s geothermal sector is booming for heating. The U.S. has next-gen tech and capital. But Europe? Europe’s geothermal sector exists mostly in Switzerland and Iceland. The continent’s geothermal energy become bigger, yes, but slower than you’d expect given their climate goals.
Geography is destiny. You can’t build EGS everywhere — at least not yet. The best early markets are where you have hot rock within reach and a grid that actually needs the power.
Frequently Asked Questions
Why Isn’t Geothermal Energy Become Bigger if It’s So Reliable?
Geothermal didn’t scale historically because it’s location-dependent, expensive to develop, and the drilling industry had no experience with it. Solar and wind had falling cost curves — each generation got cheaper. Geothermal was stuck building custom projects. That’s changing now as EGS technology matures and becomes more repeatable, but it’s still not a “drop it anywhere” solution like solar.
Can Geothermal Energy Become Bigger Without Government Subsidies?
Partially. Private capital is entering the market, especially for data center contracts. But drilling risk remains real. Government help with exploration drilling — like the DOE’s $171.5 million program — is essential. You need shared risk on the downside to attract venture capital on the upside.
What will Geothermal Energy Become Bigger to in Terms of Percentage of Global Electricity?
Current projections vary. The IEA estimates geothermal could meet up to 15% of global electricity demand growth to 2050 under optimistic scenarios, but that’s growth, not total generation. More realistic: geothermal could double or triple in the next decade, reaching maybe 2-3% of global capacity. Meaningful, not revolutionary.
Where will Geothermal Energy Become Bigger Fastest?
North America (especially the US West), Indonesia, the Philippines, and East Africa are the fastest-growing regions. Data centers and industrial heat demand are the primary drivers. Iceland and New Zealand already maximize their resources; growth there will be modest.
Is Geothermal Energy Become Bigger Enough to Replace Coal?
No. Not in timeframe that matters. But it doesn’t need to. Geothermal’s job is to provide firm baseload power where wind and solar can’t handle variability alone. Think of it as the stabilizer, not the main event. You’ll never retire a coal plant because of geothermal alone. You retire it because geothermal + solar + wind + storage work together.
The Takeaway: Geothermal’s Real Moment
Here’s what actually matters: why geothermal energy become bigger isn’t a mystery. It’s the collision of necessity, technology, and capital. You need reliable power. The tech finally works at scale. The money is flowing.
Will geothermal be 50% of the grid by 2030? No. Will it be 5%? Getting there. But the real story isn’t the percentage. It’s the shift from “interesting option” to “must-have piece.” When a tech company building a data center first calls a geothermal developer instead of last — that’s when you know the market has turned.
The heat beneath your feet is about to pay some bills.
