The United Arab Emirates announced on April 28, 2026, that it will leave OPEC and the broader OPEC+ grouping — which includes Russia — effective May 1, dealing a significant blow to the oil cartel at one of the most turbulent moments in its history. The withdrawal removes the third- and fourth-largest producers from the two groupings respectively and strips OPEC of roughly 12% of its total output. Coming as the organisation already grapples with a collapse in Gulf exports caused by disruptions to the Strait of Hormuz — the narrow waterway through which much of the world's seaborne oil passes — the UAE's abrupt departure deepens questions about the cartel's long-term coherence.

The move is as much a political statement as an economic one. Abu Dhabi, the largest and wealthiest of the seven emirates that make up the UAE and the holder of 95% of Emirati oil reserves, has chafed against OPEC production quotas for years. The UAE had invested heavily to expand its capacity from roughly 3.4 million barrels per day to a target of 5 million barrels per day by 2027, yet OPEC constraints kept it producing far below that ceiling. Freed from those limits, Emirati officials have pointed to new pipeline capacity from Abu Dhabi's inland oil fields to the port of Fujairah on the Arabian Sea — bypassing the Strait of Hormuz entirely — as the route through which vastly expanded production could eventually reach global markets. The UAE also has a more diversified economy than Saudi Arabia, drawing significant revenues from finance and tourism, making it better placed to withstand any price war that Riyadh might launch in response.

The announcement landed while the six-member Gulf Cooperation Council — the political bloc comprising the UAE, Saudi Arabia, Qatar, Bahrain, Kuwait and Oman — was meeting in an emergency session in Jeddah, and came without prior consultation with partners. That timing was pointed. Since the start of the US-Israel military campaign against Iran, which began in late February 2026, the UAE has faced more than 2,200 Iranian drone and missile strikes, in part because of its geographical exposure and its close ties to Israel. Emirati officials have repeatedly pushed Saudi Arabia and Qatar to take firmer collective action against Iran, without success. Iran's attacks temporarily slashed UAE production by 44% to around 1.9 million barrels a day in March alone. Unable to forge the political solidarity it sought, the UAE has now chosen to abandon the economic solidarity of the producers' club.

The decision widens a rift between the UAE and Saudi Arabia that predates the current conflict. Tensions over production quotas became openly visible as far back as July 2021, and competing visions for the region — including rival approaches to Yemen — strained the relationship well before the Iran war. Saudi Arabia relies on higher oil prices to fund its Vision 2030 infrastructure programme and state budget, while Abu Dhabi has increasingly sought to maximise volumes rather than prices, driven partly by a desire to monetise reserves before long-term global demand declines. By leaving OPEC, the UAE also positions itself as the Gulf state closest to US President Donald Trump, a long-standing critic of the cartel — a relationship Emirati officials openly value.

Why this matters: OPEC's share of internationally traded oil has fallen from around 85% in the 1970s to roughly 50% today, and the organisation no longer commands the monopoly leverage it once wielded. Even so, the UAE's exit — far larger in scale than Qatar's departure in 2019 or Angola's in 2024 — removes one of the few significant swing producers capable of rapidly adjusting output to stabilise markets. If the Strait of Hormuz eventually reopens and new UAE pipeline capacity comes online, a surge of unconstrained Emirati oil could push prices sharply lower, creating severe fiscal stress for poorer OPEC members. Analysts caution that Saudi Arabia's response will be decisive: a retaliatory output increase could trigger the kind of price war that reshapes the entire producing world. The broader question hanging over the Gulf is whether the UAE's reassessment of OPEC membership will prompt it to reconsider other regional bodies as well — with potentially far-reaching consequences for the post-war order in the Middle East.