The FIA amended its 2026 power unit regulations by expanding the Additional Development and Upgrade Opportunities, or ADUO, regime to give lagging manufacturers extra dyno hours, additional upgrade windows and cost cap allowances. The change inserts a new greater-than-10 percent performance deficit tier into the existing sliding scale that already covers deficits above 2, 4, 6 and 8 percent.

Manufacturers measured more than 10 percent behind can access an additional $11.0 million, up from $8.0 million, plus 40 extra dyno hours. They also receive a one-off inaugural-season $8.0 million allowance, creating a potential $19.0 million uplift that the FIA treats as a downward adjustment against the cost cap. The $8.0 million 2026 allowance is structured as a loan to be repaid across 2029 through 2031 under the updated rules.

Reporting windows were revised to reflect the lost Bahrain and Saudi rounds, with period one covering rounds 1–5 (ending in Montreal), period two running through round 11 (Hungary) and the final period running through round 18 (Interlagos). The change was prompted by early reliability and vibration problems that harmed performance and durability for Honda when supplying Aston Martin, and Honda is viewed as a likely beneficiary. Teams and rival manufacturers cautioned the system must guard against “leapfrogging”, critics warned the move risks manufacturer-specific assistance and a precedent for future entrants, and figures including Toto Wolff raised concerns about targeted remedies. Observers also noted the loan structure and the policy’s design raise questions about long-term parity and whether similar interventions could recur for other manufacturers.