What is the 90% rule in F1?
The 90% rule is the threshold for being classified in a Formula 1 race. A driver must complete at least 90% of the race winner's total distance to be officially classified as a finisher and earn points. Drivers who retire or are too far behind to meet the threshold are not classified, even if their car crossed the line.
How the rule works
To be classified in the official race results, a driver must complete at least 90% of the race distance covered by the winner[2]. A driver who retires partway through, or whose car is too slow to reach 90% in the time allowed, will not appear in the classified results and will not earn points.
A worked example: if the winner completes 78 laps at Monaco, a driver must complete at least 71 laps (rounded up from 70.2) to be classified.
When the rule changes results
The 90% rule produces unusual classification outcomes most often when:
- A driver retires late in the race with a mechanical issue but their car was already classified.
- Several drivers retire early and the field is significantly reduced.
- The race is red-flagged and restarted, compressing the effective distance.
- Heavy rain or repeated safety cars lengthen the race timing while reducing actual racing distance covered.
Notable case: the 2005 United States Grand Prix at Indianapolis, where 14 cars withdrew before the start due to tyre safety concerns. Only six cars actually competed. The rule meant the winners' position structure was unusual but valid[2].
Why the rule exists
:::analysis The rule has two practical purposes:
- Fairness in points distribution. A driver who retires after 5 laps clearly did not "finish" the race in any meaningful sense. The rule sets a numerical floor for what counts as completion.
- Discouraging gaming. Without the rule, a driver could in theory limp around the track at very low pace to claim a low position. The 90% requirement ensures a driver must be at least roughly racing speed to be classified. :::
What happens when a driver crosses the line but is not classified
The car is shown as "not classified" (NC) in the official results. The driver receives no points. For championship standings purposes, the result counts the same as a retirement (DNF).
A car can be flagged across the line by the chequered flag (because the leader has finished) without that lap counting, if the car has not been on a representative racing pace.
Related concepts
- The 107% rule is its qualifying counterpart, applied to lap times not race distance.
- For an overview of how all the major F1 rules interact, see what are the strategies in F1?.
- [1]FIA Formula 1 Sporting Regulations (fia). Accessed 2026-05-25.
- [2]Formula One regulations (Wikipedia) (wikipedia-en). Accessed 2026-05-25.