When Exactly Will Oil Demand Peak?

Why Does the Same Question Produce Three Different Answers?

Electric vehicles are becoming increasingly common, yet air travel and plastics consumption continue to grow: in what year will these opposing forces finally cause global oil demand to stop rising? The IEA’s World Energy Outlook 2025, OPEC’s OPEC World Oil Outlook 2050 (WOO 2025 edition), and IRENA’s Transitioning away from fossil fuels: renewables, electrification and grid enhancement each offer a different assessment.

Here, “peak” means that global oil demand reaches its highest level and then stops growing steadily. The three reports are not presenting the same forecast: the IEA calculates both a scenario based on current policies and one based on announced policies, OPEC provides a reference scenario and a technology acceleration scenario, and IRENA assesses an electrification pathway compatible with the 1.5°C target. The IEA also makes clear that outlooks diverge substantially because of differing assumptions about economic growth, policy strength, technology costs, energy prices, and the pace of innovation.

The peak year is therefore first and foremost the result of scenario calculations. What the three reports have in common is an analysis of which factors reduce or support demand and under what conditions the answer would change; the materials cannot provide a single inevitable date independent of policy and technology assumptions.

IEA: Around 2030, but with One Important Condition

Under the IEA’s Stated Policies Scenario (STEPS), policies that countries have announced and have a certain foundation for implementing continue to advance. The IEA considers road-transport electrification the primary reason global oil demand peaks around 2030; China’s oil demand peaks before 2030 and falls to approximately 15 million barrels per day by 2035. The core assumption is that electric-vehicle sales, charging infrastructure, and related policies can continue to expand.

Even if passenger cars burn less oil, the IEA does not assume that oil will disappear rapidly. Its STEPS scenario projects that by 2035, oil use in cars will decline by 2.6 million barrels per day and oil use in buildings by 1.3 million barrels per day, while petrochemical feedstocks and aviation fuel increase by 3.3 million and 2.2 million barrels per day, respectively. This means the period around the peak could be a relatively flat plateau rather than a sudden collapse in demand.

The IEA’s Current Policies Scenario (CPS) presents another path: if electric-vehicle adoption slows in regions without strong policy support, and transport, aviation, and petrochemical demand continue to grow in India, Southeast Asia, Africa, and elsewhere, global oil demand will still rise to 113 million barrels per day by 2050. The two answers from the same institution already show that the IEA’s projected peak around 2030 depends on whether announced policies are actually converted into vehicles, grids, and infrastructure.

OPEC: No Global Peak in Sight Before 2050

OPEC’s reference scenario projects global oil demand rising from 103.7 million barrels per day in 2024 to 113.3 million barrels per day in 2030 and reaching approximately 122.9 million barrels per day in 2050. Along this path, no global demand peak appears within the outlook period.

OPEC places the main additions in developing economies. Its report projects that between 2024 and 2050, oil demand in non-OECD regions will increase by 27.7 million barrels per day, including an increase of 8.2 million barrels per day in India; over the same period, OECD demand will decline by 8.5 million barrels per day. On this basis, the reduction in oil use across Europe, the United States, and other developed economies is still insufficient to offset growth in India, other parts of Asia, the Middle East, and Africa.

The assumptions about end uses also differ. OPEC projects that the global vehicle fleet will continue expanding by 2050, with internal-combustion-engine vehicles accounting for approximately 72%; between 2024 and 2050, road transport, aviation, and petrochemical demand will increase by 5.3 million, 4.2 million, and 4.7 million barrels per day, respectively. OPEC’s reference scenario therefore holds that even rapid electric-vehicle growth will not prevent new travel, freight, aviation, and petrochemical consumption from driving total oil demand higher.

IRENA: Whether the Peak Arrives Also Depends on the Grid

IRENA’s report does not give a standalone year for the global oil-demand peak. It discusses the system conditions required for fossil-fuel demand to decline structurally: in its revised 1.5°C scenario, electricity’s share of global final energy consumption must rise from approximately 23% today to 35% in 2035 and exceed 50% in 2050. Transport electrification is only one part of the picture; building heating and industrial energy use must also shift to electricity.

IRENA argues that this pathway depends on large-scale investment in grids, storage, and renewable energy. Its scenario requires annual global grid investment to rise from approximately $500 billion in 2025 to around $1 trillion per year in 2026–2035, then to $1.2 trillion per year in 2036–2050. If these investments do not materialize, electric vehicles and other electrified equipment may face power-supply constraints even when they have a cost advantage.

Actual progress remains a constraint emphasized by IRENA. The report says that approximately 2,500 gigawatts of wind, solar, and storage projects worldwide are waiting to be connected to the grid; global energy intensity improved by only approximately 1% in 2023–2024, well below the target, and must improve by at least 5% annually thereafter to catch up with the 2030 pathway. These figures set out the conditions required to replace oil, but do not prove that those conditions will be met on schedule.

The Divergence Comes from Four Assumptions

The first difference is policy delivery. The IEA’s STEPS includes policies that have been announced and have a certain foundation for implementation, while the CPS is closer to a path in which policies remain at their current state; OPEC’s reference scenario places greater weight on energy security, affordability, and recent policy reversals. The main gap between the reports comes from the strength of future policy execution, rather than a simple disagreement over current oil consumption levels.

The second difference is whether new demand in developing economies can be offset by electrification. OPEC projects that India alone will add 8.2 million barrels per day of oil demand by 2050; the IEA’s STEPS also acknowledges continued growth in India, Africa, and Southeast Asia, but considers declines in oil use in cars and buildings sufficient to turn global demand downward around 2030. The two reports point in similar directions on growth regions; the difference lies in the speed of substitution and the scale of new consumption.

The third difference is whether the grid can keep pace with vehicles and clean power. The 2,500-gigawatt grid-connection queue identified by IRENA shows that building more wind and solar capacity does not automatically mean that more end-use oil will be displaced. The fourth difference is the treatment of hard-to-electrify uses such as aviation, freight, and petrochemicals: the IEA expects these sectors to slow the decline after the peak, while OPEC considers them sufficient to keep pushing total demand higher.

OPEC’s own alternative scenario also shows the impact of technology assumptions. In its technology-driven scenario, faster efficiency gains and fuel substitution reduce 2050 oil demand by 16.7 million barrels per day compared with the reference scenario, bringing it below 107 million barrels per day. Although this level still does not directly specify a peak year, it shows that even within OPEC’s modeling framework, changing the pace of technology diffusion can shift the long-term demand curve substantially downward.

The Answer Depends on Which Assumption Holds

Under the IEA’s STEPS scenario, global oil demand is most likely to peak around 2030; under the IEA’s CPS and OPEC’s reference scenario, it could continue growing through 2050. IRENA does not provide a third peak year; instead, it points out that electrification, grids, storage, energy efficiency, and policy must all accelerate together for the first pathway to materialize.

The three reports collectively focus on four indicators: whether electric vehicles continue expanding into regions without strong policy support, how large new transport demand in developing economies will be, whether grid investment can absorb the connection queue, and whether aviation, freight, and petrochemical demand can be substituted. When these variables are closer to the IEA’s STEPS assumptions, the peak will be nearer 2030; when they are closer to the CPS or OPEC reference scenario, the peak will be delayed beyond 2050 or at least beyond the scope of this outlook.

The answer supported by these three studies is therefore a conditional range rather than a specific year: around 2030 is the scenario outcome when policy and electrification continue to advance, while no peak before 2050 is the scenario outcome when policy slows, demand in developing regions remains strong, and hard-to-substitute uses continue growing.

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Source institutions：International Energy Agency、International Renewable Energy Agency、OPEC

This content is for reading and understanding research reports. It does not constitute investment advice or trading signals.