TIMELINE

Regulation evolution

A look back at the most important Formula 1 rule changes, pulled directly from the year-by-year summaries we publish.

202625 changes

TECHNICALPower Unit — 50/50 hybrid, no MGU-H

MGU-H removed — simpler ERS with MGU-K as the sole recovery motor.
Electrical output increased dramatically, moving toward a 50/50 split.
Fuel flow limit converted from mass-based to energy-based (MJ/h).
Power-unit cost cap introduced, separate from the team cost cap.
New manufacturers Audi and Cadillac supply grids from 2026 onwards.

TECHNICAL100% sustainable fuel

Fuel must be produced from fully sustainable sources — no fossil components permitted.
Fuel flow control migrates from mass-based (kg/h) to energy-based (MJ/h).
Pre-event fuel sampling and certification required.

TECHNICALChassis — smaller, lighter, narrower

Minimum weight reduced by ~30 kg versus 2025.
Wheelbase and overall width trimmed to improve agility.
Crash structures re-engineered for the new PU architecture.

TECHNICALActive aerodynamics — driver-switched modes

DRS retired — replaced by driver-activated active aero available lap-wide.
Rear and front wing flaps move synchronously between two fixed positions.
Overtaking now relies on battery deployment strategy rather than DRS zones.

SPORTINGGrid expansion — 22 cars

Grid size 20 → 22 cars (Cadillac added).
Q1 elimination threshold updated to match the larger grid.
Pit-lane configuration revised to host 22 cars safely.

SPORTINGPower-unit component pool

Higher per-component pool for 2026 only, stepping back to 2025 levels from 2027.

SPORTINGTyre allocation — adapted to 2026 cars

Slightly fewer dry sets per weekend (sustainability continuation).
Alternative Tyre Allocation (ATA) becomes permanent on all sprint weekends.

SPORTINGRace weekend format

Format unchanged from 2025.
Fastest-lap point stays retired after its 2024 removal.

SPORTINGCost cap adjustments

Team cost cap continues with annual inflation adjustment.
Power-unit cost cap temporarily relaxed for 2026 only.
Aerodynamic Testing Restriction (ATR) sliding scale continues.

20253 changes

TECHNICALChassis & aero — continuity from 2024

Front-wing flexibility tests tightened once more.
Minor floor-edge clarifications for porpoising control.

SPORTINGFastest-lap point retired

Fastest-lap bonus point removed; fastest lap still logged statistically.

20243 changes

TECHNICALChassis & aero — stability year

Front-wing and rear-wing flex policing tightened mid-season via Technical Directives.
Minor floor-edge refinements continuing the 2022+2023 porpoising-mitigation line.

SPORTINGRace format & tyre allocation

No step change to the 2-compound rule or Pirelli allocation sizes vs 2023.

20238 changes

TECHNICALFloor & diffuser — porpoising mitigation

Raised floor-edge height vs 2022.
Tightened diffuser throat geometry.
Aerodynamic Oscillation Metric threshold policed in-event.

TECHNICALSafety

Strengthened roll-hoop structural test post-Silverstone 2022.
Larger mirror minimum dimensions for improved rearward vision.

SPORTINGSprint weekend — redesigned format

Sprint Shootout introduced on Saturday morning.
Sprint result decoupled from Sunday grid.
Six sprint events on the calendar (up from three in 2022).

20226 changes

TECHNICALGround effect — underfloor venturi

Return to ground-effect underfloor aerodynamics (first time since the 1980s).
Simplified front and rear wings designed to trail cleaner wake.

TECHNICALPower unit — architecture retained, development frozen

PU development freeze 2022-2025.
E10 fuel (10% ethanol) introduced.

SPORTINGCalendar, entries & points

Sprint points expanded to P1-P8 (from P1-P3 in 2021).
Sliding scale for shortened-race points introduced.

20216 changes

TECHNICALRear-end downforce cut

Triangular floor cut-out ahead of rear tyre.
Brake-duct fin restrictions.

SPORTINGSprint-race trial

Sprint format introduced at three events.
Sprint winner scored the pole-position statistic for the grand prix.

SPORTINGCost cap — debut year

First season under the constructors' cost cap.
Minor vs Material Overspend breach categories defined.

20193 changes

TECHNICALFuel allocation & minimum weight

Race fuel allowance raised.
Minimum weight raised.

SPORTINGFastest-lap bonus point returns

Fastest-lap 1-point bonus reintroduced (first time since 1959).

20181 changes

TECHNICALHalo — mandatory head-protection device

Halo mandated on all F1 cars.

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Data: F1 Official · OpenF1 · FastF1