The ruleset and effective version used here
This page applies to entrants in the 2026 FIA Formula One World Championship. The financial baseline is Section D, Issue 07, dated 25 June 2026 and in force for reporting periods beginning on or after 1 January 2026. Aerodynamic testing and shutdown rules come from Section F, Issue 10, dated 5 August 2026. Track running outside a Competition is identified separately under Section B, Issue 08, dated 5 August 2026.
These are FIA Formula 1 rules, not a general rule for Formula 2, Formula E, IndyCar or another championship. FIA Determinations can also prescribe binding accounting methods where Section D authorises them; public guidance and team-specific feedback are advisory, while the Cost Cap Adjudication Panel and ultimately the International Court of Appeal decide disputed interpretations.