Southeast Asia's Fuel Subsidy Cliff: How the Hormuz Crisis Breaks ASEAN's Energy Model

Indonesia's fuel subsidy bill consumed 174.8 trillion rupiah of the national budget in 2024, roughly $10.7 billion. That was during a year of relatively stable global oil prices. With the Strait of Hormuz effectively shutting down a fifth of global oil and LNG supply, Pertamina, the state oil company, now imports crude at international prices that have spiked 40% to 80% above pre-crisis levels and sells the refined products domestically at capped prices. The gap between what the government pays and what citizens pay at the pump is widening by billions of dollars per month. Across Southeast Asia, some 700 million people are discovering what happens when the energy model that powered their region's rise stops working.

The Region That Became a Net Importer

Southeast Asia's relationship with fossil fuels has reversed over two decades. Indonesia was an OPEC member until 2009, when declining production and rising domestic consumption turned the country from a net oil exporter into a net importer. Malaysia, once a significant exporter, now imports refined products. Thailand's Gulf of Thailand gas fields are depleting. Vietnam's offshore production peaked years ago. Myanmar's gas production has fallen sharply amid political instability.

The region's energy demand, meanwhile, has grown relentlessly. ASEAN's primary energy consumption increased by roughly 70% between 2000 and 2024, driven by industrialization, urbanization, and a growing middle class that buys cars, air conditioners, and refrigerators. Electricity demand growth across ASEAN has averaged 5% to 6% annually, far outpacing domestic energy production.

The result is a region that has become structurally dependent on energy imports. Indonesia imports roughly 40% of its oil as crude and refined products. Thailand imports approximately 60% of its crude oil. The Philippines produces negligible domestic oil and gas, importing nearly all of its petroleum needs. Vietnam, which once exported crude oil, has shifted to net import status.

LNG tells the same story in compressed form. Southeast Asian LNG demand grew rapidly between 2020 and 2025. Thailand and Singapore built new LNG receiving terminals. Vietnam and the Philippines planned major LNG import facilities, with several commissioned in recent years. Much of this imported LNG comes from Qatar, Australia, and Oman. The Qatari and Omani cargoes transit Hormuz. When the strait closed, a significant portion of the region's planned gas supply disappeared from the market.

Pertamina's Impossible Math

Pertamina operates the largest refining and fuel distribution network in Southeast Asia. The company refines domestic crude, imports additional crude and refined products, and distributes fuel across an archipelago of 17,000 islands. Its pricing is not set by the market. The government mandates that Pertalite, the most widely consumed gasoline grade, and subsidized diesel sell at prices well below international rates.

This system works when crude prices are moderate and stable. It breaks when prices spike. Pertamina's cost of procuring crude oil and refined products has surged since the Hormuz disruption. The company's losses on every liter of subsidized fuel sold at the pump grow larger with each dollar added to the international oil price. Those losses are either absorbed by Pertamina's balance sheet, compensated by government budget transfers, or both.

Indonesia's Ministry of Finance faces a familiar trap. The fuel subsidy allocation in the 2026 budget was calculated based on oil price assumptions of roughly $80 to $85 per barrel of Brent crude. Current prices far exceed those assumptions. Every $10 per barrel increase in crude adds approximately 50 to 60 trillion rupiah to the annual subsidy bill. A sustained $30 per barrel increase, well within the range of current market conditions, adds 150 to 180 trillion rupiah, consuming fiscal resources that were budgeted for infrastructure, education, and social programs.

Past experience shows what happens when Indonesia tries to cut fuel subsidies. In 2014, President Jokowi reduced fuel subsidies as part of fiscal reforms. Protests erupted across major cities. In 2022, a smaller subsidy adjustment triggered demonstrations that turned violent in some areas. The political memory of fuel subsidy cuts defines the boundaries of Indonesian fiscal policy. Raising pump prices to reflect market reality is economically rational and politically dangerous.

The Factory Floor Feels It First

Southeast Asia's manufacturing sector has been the region's growth engine for three decades. Vietnam's electronics assembly industry, Thailand's automotive plants, Indonesia's palm oil processing, the Philippines' business process outsourcing centers: all depend on reliable, affordable electricity and fuel.

Natural gas generates a significant share of electricity across ASEAN. Thailand derives roughly 55% to 60% of its electricity from natural gas. Singapore depends on gas for over 95% of power generation. Malaysia uses gas for approximately 40% of electricity. When LNG import costs spike, electricity generation costs follow, and those costs cascade to every factory, office, and household connected to the grid.

The industrial impact is particularly acute for energy-intensive manufacturing. Thailand's automotive sector, which assembles vehicles for Toyota, Honda, Mitsubishi, and other Japanese manufacturers, operates on energy cost assumptions built into long-term investment plans. When electricity costs rise 20% to 30%, the cost competitiveness that attracted those manufacturers erodes. Vietnam's electronics assembly sector, which produces for Samsung, LG, and Apple, faces similar pressure.

The concern for ASEAN policymakers extends beyond the current quarter's production costs. Foreign direct investment decisions in manufacturing are made years in advance. If Southeast Asia becomes perceived as a region with unreliable and expensive energy, the investment that has been flowing into the region from companies diversifying away from China could slow or redirect entirely. Bangladesh, Mexico, and India are alternative destinations that compete for the same manufacturing investment. An energy cost disadvantage could alter the competitive dynamics for years.

The Electricity Crunch

Electricity supply across ASEAN was already tight before the Hormuz crisis. The Philippines experienced rolling brownouts in several regions during 2025. Vietnam imposed power rationing for industrial users during peak demand periods. Indonesia's state utility PLN has struggled to keep pace with demand growth outside of Java, the main island.

The LNG supply disruption compounds these existing pressures. Power plants designed to burn natural gas cannot switch to alternative fuels quickly. Some dual-fuel plants can shift to diesel or heavy fuel oil, but these alternatives are themselves more expensive due to the broader oil supply disruption. Coal-fired plants offer partial relief, as coal supply chains are less affected by the Hormuz closure, but coal plant capacity in the region is fixed in the short term and cannot expand to fill the gas gap.

The human cost is immediate. In tropical countries where temperatures regularly exceed 35 degrees Celsius, electricity is not a convenience. Air conditioning in hospitals, cold storage for food and medicine, and industrial ventilation are essential services. Power rationing that affects these sectors endangers public health directly.

Indonesia's PLN faces a particular challenge on the outer islands. Java's electricity grid is relatively robust and connected to diverse generation sources. But Sumatra, Kalimantan, Sulawesi, and eastern Indonesia depend on smaller, less diversified power systems. Several of these rely heavily on oil-fired or gas-fired generation. Fuel supply disruptions hit these grids first and hardest.

The Subsidy Domino Across ASEAN

Indonesia is not the only ASEAN economy that subsidizes fuel. Malaysia's government caps prices for RON95 petrol and diesel through a complex subsidy and price control mechanism. In 2024, Malaysia spent over 40 billion ringgit on fuel subsidies, a figure that was already straining the budget under the government's fiscal consolidation plans. The Hormuz crisis makes those plans unworkable.

Thailand operates a fuel price stabilization fund, the Oil Fuel Fund, that absorbs price spikes and smooths fluctuations for consumers. The fund was already depleted from managing prices during 2022 and has limited capacity to absorb a larger and longer shock. When the fund runs dry, prices pass through to consumers.

The Philippines does not subsidize fuel directly but provides targeted cash transfers to the poorest households during price spikes. The fiscal cost of these transfers rises with oil prices, and the government's budget, already stretched by post-pandemic debt, has limited room for expansion.

Vietnam's fuel pricing mechanism allows for some government intervention, but the country's fuel reserve system is relatively thin. The government can delay price adjustments but cannot absorb sustained cost increases without either depleting reserves or cutting other spending.

The pattern across the region is consistent: governments built energy pricing systems for an era of stable, moderate oil prices. Those systems cannot absorb a sustained 50% to 100% price increase without either fiscal crisis (the government absorbs the cost and runs out of money), social crisis (the government passes the cost to consumers, who cannot afford it), or both.

The ASEAN Response That Does Not Exist

Europe's 2022 energy crisis was managed through the European Union's institutional framework. The EU coordinated gas purchases, shared supply through interconnected pipelines, and allocated fiscal support through common frameworks. The response was imperfect but the coordination mechanism existed.

ASEAN has no equivalent mechanism. The ASEAN Centre for Energy produces research and policy recommendations, but the organization has no authority to coordinate emergency energy supply, allocate reserves across member states, or mandate demand reduction measures. Each country faces the crisis alone, negotiating individually with suppliers and managing its own fiscal constraints.

The ASEAN Power Grid, a long-discussed plan to connect electricity networks across member states, remains incomplete. Cross-border electricity trade exists between some pairs of countries (Thailand-Laos, Singapore-Malaysia) but is insufficient to significantly rebalance supply during a crisis. The Trans-ASEAN Gas Pipeline, another long-term infrastructure vision, exists mostly on paper.

This institutional gap means that ASEAN's 700 million people confront the most severe energy shock in the region's modern history without regional coordination mechanisms. Each government makes its own calculation about subsidy sustainability, reserve management, and demand rationing. The strongest economies, Singapore and Malaysia, have more fiscal resilience. The weakest, Myanmar and Cambodia, have almost none. The result is a patchwork response where the crisis hits the poorest populations in the poorest countries hardest.

What Breaks First

The Hormuz crisis in Southeast Asia is a stress test with multiple failure points. Fiscal sustainability is the first: how long can governments maintain fuel subsidies before the budget buckles. Industrial competitiveness is the second: how long before manufacturers shift investment away from a region with expensive and unreliable energy. Social stability is the third: how long before consumers bearing the cost of higher fuel and food prices take their frustration to the streets.

Indonesia's subsidy math will reach a decision point within months. Either the government finds additional budget resources, perhaps by cutting infrastructure spending or increasing debt, or it raises fuel prices and accepts the political consequences. Malaysia faces the same choice on a smaller scale. Thailand's Oil Fuel Fund will need replenishment or abolition.

For the longer term, the Hormuz crisis exposes a development model built on an assumption that no longer holds: that cheap, reliably shipped fossil fuel would always be available to power Southeast Asia's growth. That assumption has been shattered. What replaces it, whether accelerated renewable deployment, nuclear energy exploration by countries like the Philippines and Indonesia, or deeper reliance on Australian and US LNG through longer and more expensive supply routes, will define the region's energy architecture for decades.

The 700 million people of ASEAN do not experience this crisis as a geopolitical abstraction. They experience it as the price on the fuel pump, the size of the electricity bill, and the cost of rice at the market. When those numbers move, everything else follows.