Pertamina Geothermal Energy (PGEO) delivered a compelling paradox in its third-quarter 2025 earnings: robust revenue expansion clashed with escalating operational costs, ultimately compressing net profits below market expectations. Investors are now dissecting whether this represents a temporary blip or a more entrenched challenge for the Indonesian geothermal giant.

3Q25 Financials: Revenue Soars, Profit Sinks

For the third quarter ended September 30, 2025, PGEO posted a net profit of US$35 million. This figure marks a 6% decline year-over-year (YoY) and a 6% dip quarter-over-quarter (QoQ), a sharp contrast to the company’s otherwise solid top-line performance. Cumulatively, net profit for the first nine months of 2025 reached US$104 million, signifying a 22% YoY decrease. This 9M25 result notably falls short, representing only 67% of the consensus 2025 full-year estimates, signaling a significant deviation from analyst projections.

Revenue Dynamics: A Pillar of Strength

Despite the profit contraction, PGEO’s revenue engine demonstrated remarkable resilience. The company reported a 12% YoY and 10% QoQ increase in revenue for 3Q25. This robust growth underscores healthy demand and effective operational output, suggesting that the core business generation remains strong and capable of driving top-line expansion. The challenge, however, lies in translating this revenue power into proportional earnings growth.

The Cost Conundrum: Pressures Mount on Margins

The primary antagonist in PGEO’s Q3 narrative was a significant surge in operational expenses, which squeezed profit margins despite the healthy revenue. Detailed filings reveal that the cost of goods sold (COGS) dramatically increased by 34% YoY and 41% QoQ. This massive escalation was largely attributed to two key factors:

• Depreciation Expenses: A notable 18% YoY and 8% QoQ rise in depreciation suggests significant capital expenditure coming online or accelerated asset write-downs impacting the cost structure.
• Wages and Benefits: The most striking increase came from wages and benefits, which ballooned to US$21 million. This compares starkly to US$9 million in 3Q24 and US$5 million in 2Q25, pointing to potentially higher personnel costs, expanded workforce, or one-off employee-related expenses.

Furthermore, operating expenses also climbed to US$9 million in 3Q25, a substantial jump from US$2 million in 3Q24, though flat QoQ against 2Q25. These collective cost increases created a powerful headwind against the company’s profitability, turning revenue growth into a more muted earnings story.

Investor Outlook: Navigating the Geothermal Current

For investors eyeing PGEO stock, the 3Q25 results present a dichotomy. While the fundamental demand for geothermal energy and PGEO’s ability to generate revenue remain robust, the escalation in COGS and operating expenses demands close scrutiny. The market will be keenly watching management’s strategy to control these rising costs, particularly wages and depreciation, as the company scales its operations. PGEO’s trajectory as a key player in sustainable energy hinges not just on expanding its geothermal footprint, but also on demonstrating efficient cost management to unlock its full profit potential. Future quarters will be critical in determining whether these cost pressures are transient adjustments or a new normal for the geothermal energy provider.