This is the premier class of WEC. It is open to cars that comply with the Le Mans Hypercar technical regulation set by FIA and ACO, and they can be prototype cars with “Hypercar” type exterior styling designed by the automobile makers to represent their corporate images, or they can adopt the same basic styling of the makers’ public road-legal Hypercar models modified to the required race regulations. The average lap to be achieved in the final of the 24 hours of Le Mans is set at 3 minutes and 30 seconds. Under the regulation, the cars must have a closed body with the overall length of no more than 5,000 mm, the overall width of no more than 2,000 mm and the height of over 1,150 mm from the reference surface, while the machine weight must be no less than 1,030 kg. There are no limits set on engine displacement or number of cylinders, and hybrid systems are also permitted. The tires to be used are limited to those of the sole supplier, Michelin. Balance of performance (BoP) mechanisms will be adopted by all cars. The color of a number panel has to be red. There is basically no restriction on the make-up of driver teams, but no Bronze class drivers can compete.

This is the prototype category for privateer teams operating independently from the chassis constructors and engine suppliers. There is a cap on the size of budget allowed for the teams and they must use chassis that are constructed with a cap on cost decided by Dallara and the rest of the four designated constructors. As for the engine, only one make by Gibson Technology can be used, which is a 4.2-liter, V8, naturally aspirated engine. The cars must have a closed body with the overall length capped at 4,750 mm, the overall width at no less than 1,800 mm and no wider than 1,900 mm, and the overall height must be no less than 1,050 mm, while the machine weight must be no less than 930 kg. The fuel tank must hold no more than 75 liters. The make-up of driver teams must include one Silver or Bronze class driver. The color of a number panel has to be blue. Currently, this is the class with the largest number of WEC entries.

This is the GT category for professional teams competing for the world title with works machines of automobile manufacturers. However, a manufacturer can only enter two cars on a full-season basis. Balance of performance (BoP) regulations are adopted for this category, with a prescribed system by which the minimum machine weight is decided based on performance evaluation test results. Specifications for the cars' fuel tank capacity, a rear wing height, an air restrictor, turbo boost pressure, etc., are also subjected to BoP regulations. Four-wheel drive is prohibited. Traction control systems are permitted, and brake discs must be made of steel-based alloys. The engines are based on ones mounted in a mass-production model by the same maker, of which a minimum of 300 units must be produced by the maker to qualify as mass-production. The engines must be naturally aspirated and have a displacement of no more than 5.5 liters, and supercharged engines are restricted to a displacement of no more than 4 liters. A number panel is in green. And as with the Hypercar class, there are no restrictions on the make-up of driver class combinations.

This is the category for amateur drivers in which the cars and other basics used are basically the same as in the LMGTE Pro category. However, in the Am class the cars are limited to those of the previous year, or cars strictly following the regulations from the previous year. A number panel is in orange. The driver combination for each car must include at least one Bronze class driver, and one more Bronze or Silver driver.