- OPEC has reduced its 2026 demand growth forecast by 190,000 bpd to 780,000 bpd.
- The IEA and US Energy Information Administration expect demand to fall by 1 million and 1.2 million bpd respectively.
- All three expect a rebound in 2027, suggesting the disagreement concerns the depth of wartime demand destruction rather than an agreed structural peak.
OPEC has cut its 2026 global oil demand growth forecast for a third consecutive month but remains more optimistic than other leading forecasters about the economic impact of the Iran war.
The producer group now expects consumption to rise by 780,000 bpd this year, down from 970,000 bpd in its previous assessment. Total demand would reach about 105.94 million bpd, according to OPEC’s July Monthly Oil Market Report.
OPEC said economic activity had remained broadly resilient during the first half and could strengthen if geopolitical tensions moderate, energy markets stabilise and trade routes normalise. It simultaneously increased its 2027 demand growth estimate by 210,000 bpd to 1.94 million bpd.
That trajectory contrasts sharply with the IEA. Its July report forecasts a 1 million bpd decline in 2026, including a year-on-year contraction of 4.8 million bpd during the second quarter. Demand is expected to recover from May’s low as fuel supplies improve and delayed travel resumes, before growing by 2 million bpd in 2027.
The US Energy Information Administration is similarly bearish for this year. It expects consumption to fall by 1.2 million bpd, with two thirds of the decline occurring in non-OECD markets. High prices, physical shortages and government restrictions have had their largest effect in Asian countries that depended most heavily on Gulf imports. The EIA also expects a 2 million bpd rebound next year.
The gap between OPEC and the two consumer country agencies is close to 2 million bpd. That is large enough to alter assessments of inventories, spare capacity, refining requirements and the speed at which prices should retreat.
Supply data remain unusually difficult to interpret. OPEC+ crude output rose by about 3 million bpd in June to 36.28 million bpd as Gulf producers began restoring production. The IEA estimates total global supply increased by 4.1 million bpd to 98.8 million bpd, but remained 9.4 million bpd below pre-war levels.
Much of June’s apparent improvement also came from releasing crude that had been held in floating or onshore storage rather than from completely restored production. Oil on water increased by 117 million barrels while onshore stocks continued to decline. Refineries and refined product exports have recovered more slowly than crude movements.
This creates two competing market narratives. Under the first, recovering Gulf supply meets demand that has been permanently impacted by high prices, producing a sizeable surplus and lower crude prices. Under the second, economic activity and mobility rebound as soon as fuel becomes available, absorbing restored supply and leaving inventories tight.
The common 2027 rebound across all three forecasts argues against treating the latest downgrade as evidence that a durable global oil demand peak has already arrived. For now, much of the contraction appears circumstantial: consumers have used less because fuel was expensive, unavailable or rationed.
Nevertheless, the forecast divergence has direct implications for UK investors. A weaker demand outcome would reduce North Sea revenues and the likelihood that Britain’s new price-triggered oil and gas levy raises money. It would also lower transport inflation and weaken the economics of marginal upstream projects. A stronger rebound would do the opposite.
