The 2026 season saw a significant shift in the manufacturer landscape. Cadillac entered the championship as the first new team since 2016, initially utilizing Ferrari power units and gearboxes with plans to transition to an in-house General Motors power unit in 2029. Audi completed its acquisition of the Sauber team, transitioning from the Kick Sauber identity used in 2024 and 2025 to a full factory works program.
Engine partnerships underwent a major realignment. Honda ended its relationship with Red Bull to become the exclusive power unit supplier for Aston Martin. Consequently, Red Bull Racing and Racing Bulls partnered with Ford, which returned to the series for the first time since 2004 to support the Red Bull Powertrains project. Alpine became a customer team for the first time since 2015, switching from Renault power to Mercedes engines and gearboxes. This transition marked the first season since 2000 without Renault as an active engine supplier in Formula One.
The 2026 grid featured several high-profile returns and promotions. Sergio Pérez and Valtteri Bottas secured full-time seats with the new Cadillac entry. Pérez joined the team after his Red Bull Racing contract was terminated by mutual agreement at the conclusion of 2024, while Bottas returned to racing after serving as a Mercedes reserve driver in 2025.
Red Bull Racing promoted Isack Hadjar from Racing Bulls to replace Yuki Tsunoda, who moved into a test and reserve role. Hadjar's vacancy at Racing Bulls was filled by Arvid Lindblad, who was promoted from Formula 2. In the opening rounds of the season, Kimi Antonelli achieved a significant breakthrough for Mercedes, becoming the youngest pole-sitter in Formula One history at the Chinese Grand Prix and the youngest driver to lead the World Drivers' Championship following his victory in Japan.
The 2026 season introduced the seventeenth version of the technical regulations, focusing on "active aerodynamics" and a new power unit balance. The MGU-H was removed, and while the 1.6-litre V6 internal combustion engine was retained, its output was reduced to 540 bhp. To compensate, the MGU-K output was nearly tripled to 470 bhp. These units utilize a fully sustainable fuel and are designed to recover twice as much electrical energy as previous iterations.
Aerodynamic changes included a reduction in wheelbase to 340 cm and a width reduction to 190 cm. The Drag Reduction System (DRS) was replaced by "overtake mode," a manual override that allows extra energy deployment when a driver is within one second of the car ahead. "Active aero" allows for moveable front and rear wing elements to switch between high and low drag configurations.
Financial regulations were also adjusted, with the team operational cost cap increasing to $215 million to account for inflation and previously exempt costs. A separate cap for power unit manufacturers was set at $130 million.
The new power unit regulations faced immediate scrutiny following a high-speed crash involving Oliver Bearman at the Japanese Grand Prix. The incident was attributed to a speed differential caused by Bearman using more electrical energy than Franco Colapinto, who was harvesting energy at the time. This led the FIA to review energy deployment rates, resulting in an increase of the "super clipping" limit from 340 bhp to 470 bhp starting at the Miami Grand Prix to reduce the need for "lift and coast" tactics on straights.
Safety updates for 2026 included a two-stage front impact structure (FIS) to prevent the component from detaching during primary collisions. Roll hoop strength was increased to withstand 20 g loads, and lateral safety lights were mandated to indicate the ERS status of a stopped car to marshals and drivers.
The 2026 calendar was reduced from twenty-four to twenty-two races following the cancellation of the Bahrain and Saudi Arabian Grands Prix due to the outbreak of the Iran war. Safety concerns prevented the organization of replacement races on short notice.
The Spanish Grand Prix moved to a new street circuit in Madrid, while the Circuit de Barcelona-Catalunya remained on the schedule as the Barcelona-Catalunya Grand Prix. The Azerbaijan Grand Prix shifted to a Saturday race to accommodate the country's Remembrance Day. Additionally, the mandatory two-stop strategy previously trialed at the Monaco Grand Prix was discontinued after teams and drivers reported it did not improve racing quality.
The early stages of the season were dominated by Mercedes. George Russell took the first victory of the season in Australia, marking the first time he led the World Drivers' Championship. Kimi Antonelli's subsequent victories in China and Japan made him the first Italian driver to lead the championship since Alberto Ascari in 1953. By the conclusion of the Japanese Grand Prix, Antonelli held the lead in the standings, while Mercedes led the World Constructors' Championship.
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