Fuel price caps in Mexico are tightening supply conditions, as the government's voluntary scheme is pushing fuel retailers away from private marketers and toward the increasingly constrained supply of state-owned Pemex, market sources say.
Mexico's fuel price cap, introduced in March 2025 to hold regular gasoline below Ps24/liter ($4.45/USG) and extended to diesel in early April 2026, hinges on coordination between the government, Pemex and retailers. Yet the policy is distorting competition between Pemex and private-sector fuel importers.
To enforce the cap, Pemex has applied wholesale terminal pricing measures, including temporary nationwide rates that erased volume-based differences. While these steps have constrained pump prices despite rising global costs, private importers remain more exposed to international volatility.
Private fuel importers struggle to match Pemex's artificially lower prices. But fuel retailers face mounting pressure to keep their gasoline and diesel prices below the caps. Consumer watchdog Profeco already visited fuel stations across the country and placed banners warning consumers not to buy fuel there if prices are deemed too high. Profeco is now conducting these visits together with environmental regulator Asea and the national guard, leading some fuel station operators to worry they could face closer scrutiny if their prices do not align with the cap, multiple retailers told Argus.
This pressure has caused more fuel retailers to source cheaper Pemex products wherever possible, as many already have set supply contracts. Becausethis dynamic is [reshaping competition](http://direct.argusmedia.com/newsandanalysis/article/2827947) in the fuel market, Pemex increasingly struggles to organize supply for fuel retailers, market sources said.
Pemex has said it has sufficient supply of gasoline and diesel available and urged calm. At times, the company has sent out communications telling retailers supply would be available at other terminals.
This causes fuel retailers to face longer fuel delivery windows and elevated logistics costs, but the real problem is that Pemex's supply delays are persistent in some parts of the country, including the north and parts of central and western Mexico.
While Pemex does eventually supply every fuel station, the delays have created rolling shortages for companies operating networks across multiple regions. This makes it difficult to keep selling fuel consistently without having to close a station occasionally, one retailer told Argus.
Energy ministry data also point to lower inventories at Pemex and private storage terminals, with gasoline stocks slipping below 2025 levels and diesel falling even further. Supplies are particularly tight in central Mexico, reflecting how the price cap is coinciding with weaker fuel availability.
