This is the WEC premier class. Open to cars that comply with the Le Mans Hypercar technical regulation, which gives the cars a larger cockpit and windscreen than the former LMP1 cars and an exterior appearance worthy of the "hypercar" description. The cars of this class include both prototype cars that the carmakers have poured state of the art technology into and race-specific versions of existing road-going hypercars.

Under the regulation, overall length is capped at 5,000 mm, overall width at 2,000 mm and height at 1,150 mm from the reference surface, while machine weight must be no less than 1,030 kg. There are no limits set on engine displacement or number of cylinders, but there is a restriction placed on front-axle drive units for cars with hybrid systems. Concerning tires, Michelin will be the sole supplier.

Thanks to the introduction of balance of performance (BoP) that will result in an equilibration of performance between the cars entered, the first year of competition under this new regulation promises plenty of close and heated racing.
The cars of this class carry red-based race numbers. There are no restrictions on driver combinations but participation by Bronze class drivers is prohibited.

This is the prototype category for privateer teams. 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 four designated constructors. As for the engine, only one make is used, which is a 4.2-liter, V8, naturally aspirated engine.
The cars have a closed body with an overall length capped at 4,750 mm, overall width at no less than 1,800 mm and no wider than 1,900 mm, and overall height at no less than 1,050 mm, while machine weight must be no less than 930 kg. The fuel tank must hold no more than 75 liters.
The race number base color is blue. The team driver make-up must include one Silver or one Bronze class driver. For the 2021 series, there will be newly presented LMP2 Pro/Am team and driver trophies.

As the name indicates, this is the top category for professional teams running GT cars. Each year works teams from the different car manufacturers compete fiercely for this coveted world title. Balance of performance (BoP) regulations are adopted for the category, with a prescribed system by which minimum machine weight is decided based on performance evaluation test results.
Specifications for the cars' fuel tank capacity, rear wing height, 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, with a minimum of 300 units produced to meet the mass-production requirement. The engines must be naturally aspirated and have a displacement of no more than 5.5 liters, while the regulation restricts supercharged engines to a displacement of no more than 4 liters.
The race number base color is green. There are no restrictions on the make-up of driver class combinations.

This is a 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 they are limited to cars of the previous year or cars strictly following the regulations from the previous year. This LMGTE Am category has the most cars entering of any category in WEC.
The race number base color is orange. The driver combination for each car must include at least one Bronze level driver, and one more Bronze or Silver driver.