As of tomorrow, the United Arab Emirates (UAE) will officially leave the Organization of Petroleum Exporting Countries (OPEC), the cartel that has historically exerted a strong influence over global oil prices through its ability to impose production quotas over its members. This is probably not going to change your life overnight. In fact, you're probably not even going to see any change in gas prices, at least in the near term, and certainly not while the Strait of Hormuz remains effectively closed. But in terms of geopolitics and the global economy, it could be significant in the longer term. It has been called "the beginning of the end of OPEC".
UAE is OPEC third or fourth biggest crude oil producer after Saudi Arabia, Iraq and maybe Iran, and has been a member of OPEC (and the expanded OPEC+ group) since 1967, soon after the group's inception in 1960.
Crucially, though, the UAE's "spare" oil capacity is second only to Saudi Arabia's, making it an important "swing producer". It has a sustainable production capacity of 4.85 million barrels a day, but due to its OPEC quota it only actually produces 3.4 million barrels a day. OPEC (effectively Saudi Arabia) is therefore causing it to lose a lot of potential revenue which, given that oil accounts for about a third of its GDP, has always rankled.
The UAE must also be painfully conscious that, as hydrocarbons are substituted by other energy sources, oil will not always be such a sure source of income. It makes sense, then, for the UAE to maximize its income from its oil reserves now, before demand craters.
UAE's exit widens its rift with Saudi Arabia, the de facto leader of OPEC, and deals a considerable blow to the influential oil producers' group and its ability to dictate oil prices. Freed from the constraints of OPEC, the UAE will almost certainly increase its crude oil output, which could have a significant effect on global prices.
The move is also seen as a win for Donald Trump, who has long railed against OPEC and its price-fixing. Trump needs gas and diesel prices to fall before the mid-term elections, and increasesd oil production by UAE could help with that.
UAE has long been a valued ally of the US, and even of Israel in recent years. UAE's decision to move now, with a US-Israeli war against Iran going on, can be no coincidence. (It has publicly complained that Saudi Arabia has offered it no support during Iran's bombardment, while Israel cleverly extended its protective Iron Dome to the Emirates.)
OPEC has gradually been losing influence for some years now. Back in the 1970s, it controlled over 50% of the world's oil; today, with the huge production increases in the USA, Canada, Russia and China, among others, that figure is closer to 30%. Several members have already defected: Indonesia left in 2016, Qatar left in 2019, Ecuador in 2020, and Angola in 2024. UAE's exit is a much bigger deal than any these. 11 members remain. And next? Almost certainly Venezuela.