The global oil deficit is deepening in 2026 even as consumption loses momentum. The International Energy Agency (IEA) has once again lowered its supply forecast and now estimates that global supply will fall by 4.3 million barrels per day (bpd) this year, or around 4%, to 102.02 million bpd.
The revision represents a deterioration from the July report, when the agency projected a decline of 3.7 million bpd. Under the new estimates, supply would remain approximately 1.27 million bpd below demand during 2026, widening an imbalance that had previously stood at around 860,000 bpd.
The figure is particularly significant because it comes as the IEA itself expects global demand to contract by 1.6 million bpd. The market is therefore facing an unusual situation: consumption is declining, but supply is falling even more sharply.
Restrictions in the Strait of Hormuz, navigation disruptions in Bab el-Mandeb, lower CPC Blend exports, and conflict-related disruptions are reducing the oil system’s ability to move enough barrels to consumption centers.
Global oil deficit could reach 1.8 million bpd in the third quarter
The greatest pressure is currently concentrated between July and September. The IEA projects a deficit of 1.8 million bpd during the third quarter of 2026, a revision of approximately 1 million bpd from its July estimate. If realized, it would be the deepest quarterly deficit since the fourth quarter of 2021.
The Middle East remains a determining factor. Oil loadings from the region had recovered to approximately 20 million bpd at the beginning of July, close to levels seen before the disruptions in Hormuz. However, they subsequently fell again to around 12 million bpd.
Regional production also remained 8.3 million bpd below pre-war levels in July. Although this represents a recovery from the maximum loss of approximately 14 million bpd recorded at the most critical point of the crisis, it still leaves a considerable volume out of the market.
The problem, therefore, does not depend solely on how much oil exists underground or on nominal production capacity. It also depends on how much can actually be produced, loaded, and transported to buyers.
How can there be an oil shortage if global demand is falling?
This apparent contradiction is one of the most important aspects of the new scenario. The IEA expects global oil consumption to decline by 1.6 million bpd during 2026, a considerably larger drop than the approximately 1 million bpd decline projected in its previous report.
Under normal conditions, lower demand could ease a tight market. But the scale of the deterioration in supply changes the equation. If supply falls faster than consumption, the market balance can remain in deficit even if the global economy uses less oil. That is precisely what the IEA’s current projections indicate.
In addition, part of the decline in consumption is related to the energy constraints themselves. Reduced availability of refined fuels and higher prices are weighing on demand, particularly for naphtha and gasoil, while Asia and the Middle East account for a significant share of the year-on-year declines.
This introduces an important distinction: part of the weakness in demand does not necessarily reflect an abundance of oil, but rather a market in which certain consumers and refiners are facing greater difficulties accessing crude oil and refined products.
The divergence between organizations also reflects the existing uncertainty. While the IEA projects a 1.6 million bpd contraction in consumption, OPEC still expects global demand to grow by 580,000 bpd in 2026, although it has also lowered its estimate.
The crisis is no longer affecting crude oil supply alone
The impact is spreading to the refining sector. Global refinery crude processing fell by approximately 5 million bpd year-on-year in July, as available capacity in other regions was unable to fully offset bottlenecks across the system.
Russia represents one of the most significant cases. Its refineries processed around 3.9 million bpd in July, close to two-decade lows, after drone attacks affected numerous facilities located west of the Ural Mountains.
The consequence is important for understanding the current market: having crude oil available does not automatically guarantee the availability of diesel, gasoline, jet fuel, or naphtha.
When the effective capacity to produce and transport fuels declines simultaneously, product markets can tighten even more than the crude oil market itself. The IEA specifically links these bottlenecks to the exceptionally high refining margins currently being observed.
Inventories are absorbing part of the deficit
Another variable is beginning to take on greater importance: oil inventories. Since the start of the war with Iran, cumulative inventory draws of approximately 410 million barrels have been recorded, according to the IEA. These inventories have acted as a buffer between available production and market needs.
But using inventories to cover a deficit is not the same as restoring supply capacity. As long as there remains a gap between the barrels the market needs and those the system can deliver, inventories serve as a temporary reserve. The longer the imbalance persists, the more important both the available volume and the logistical capacity to move it become.
The problem is particularly relevant for fuels. Global diesel and jet fuel inventories are currently at the lower end of their five-year range, in a context where refinery disruptions in the Middle East and Russia have reduced product availability.
Can the market shift from deficit to surplus in 2027?
The outlook changes dramatically when the IEA looks ahead to next year. The agency projects that global supply could exceed demand by 4.61 million bpd in 2027, enough to begin rebuilding inventories and potentially return them by the middle of next year to levels similar to those seen in February 2026.
However, that projection includes a fundamental condition: it assumes a de-escalation of hostilities over the coming months.
Therefore, the potential surplus should not be interpreted as a guaranteed outcome. It will depend on the recovery of production, the normalization of maritime routes, the availability of refining capacity, and the actual evolution of consumption.
The difference between the two scenarios is considerable. The market could move from a quarterly deficit of 1.8 million bpd in 2026 to surplus capacity exceeding 4 million bpd in 2027 if currently disrupted flows recover.
This demonstrates the extent to which the current oil balance is being shaped by physical and geopolitical constraints.
The global oil deficit in 2026 is not simply the result of extraordinary growth in consumption. In fact, the IEA expects exactly the opposite. The problem is that supply is declining more rapidly and that part of the infrastructure needed to produce, refine, and transport energy remains subject to severe constraints.
Until Hormuz and other critical routes return to sufficiently stable operations, the market will have to continue using inventories, alternative routes, and demand adjustments to compensate for the barrels that are currently unable to reach consumers.
Sources: EnergyNow
