When Lewis Hamilton won his seventh world championship and still showed up the next season with 44 on his car, he was making a deliberate statement. The number was not a placeholder. It was the same number he used in karting, the number on his first racing licence, and the brand he had built across more than a decade in Formula 1. In a sport where everything changes — cars, teams, regulations, rivals — the number stays.
That is the point of the permanent numbering system introduced in 2014. Before that, numbers were assigned to teams based on their constructors' championship position, and they shuffled every year. Now, a driver chooses a number between 2 and 99, and it travels with them across teams and seasons. Number 1 is reserved for the reigning World Champion, but even that is optional.
How the numbering system works
Under the current rules, each driver selects a permanent number when they enter Formula 1. That number stays with them for their entire F1 career, regardless of which team they drive for. The only exception is number 1, which the reigning World Champion may choose to use instead of their permanent number.
When a driver leaves Formula 1, their number enters a protection period. It cannot be selected by another driver for two full seasons. After that, it returns to the available pool. This prevents two drivers from competing with the same number in overlapping careers and preserves the identity association that the system was designed to create.
The number 17 is the only retired number in F1 history. It was withdrawn in memory of Jules Bianchi, who competed with 17 before his fatal accident in 2015. No driver will ever be assigned 17 again.
The only retired number and what it means
Number 17 is not just absent from the grid. It is formally excluded from the numbering regulations. The FIA retired it as a mark of respect for Bianchi, the last driver to carry it in a Formula 1 race.
F1 has no other retired numbers. Unlike some American sports, where iconic numbers are permanently withdrawn, F1's system allows any available number to be chosen by any eligible driver. The decision to retire 17 was an exception that reflected the circumstances, not the beginning of a broader retirement policy.
This means that even the most legendary number-driver associations — Senna's 12, Schumacher's 5, Prost's 2 — could theoretically return to the grid if the number became available and a new driver selected it.
Number 1 and why champions sometimes refuse it
Number 1 is the most visible number in Formula 1, and also the most misunderstood. The rule is simple: the reigning World Champion has the right to use number 1 for the following season. They are not required to use it.
Most recent champions have chosen to keep their permanent number instead. Sebastian Vettel raced as 5 even during his dominant years with Red Bull. Lewis Hamilton has never used 1 in a season where he had the option. Max Verstappen used 1 only briefly before returning to his personal number.
The reasons vary. Some drivers feel their permanent number is part of their identity and brand — merchandise, social media, fan recognition all tie into it. Others believe the permanent number carries a legacy that number 1, with its annual turnover, cannot match. When Verstappen switched to number 3 for 2026, it was because 3 had personal significance that mattered more to him than the temporary prestige of 1.
The only recent driver to use 1 consistently was Nico Rosberg, who announced his retirement days after winning the 2016 title — making the question moot for everyone else.
Iconic numbers and the stories behind them
Some numbers become bigger than any single season because a driver gives them meaning over time:
- 44 — Lewis Hamilton: His karting number, carried through every Formula 1 season. It became so central to his identity that his diversity initiative is named Mission 44. When fans see 44, they think of the driver, not the number.
- 77 — Valtteri Bottas: Chosen because it looked good on the car and was easy to spot on timing screens. Over five seasons at Mercedes and beyond, it became one of the most recognisable numbers on the grid.
- 16 — Charles Leclerc: He wanted 7 (his favourite) or 10, but both were taken. He settled on 16 because one plus six equals seven, and because he was born on October 16. The logic is personal enough that the number feels chosen, not assigned.
- 11 — Sergio Perez: Carried across multiple teams and career phases, 11 became associated with Perez's fighting style and consistency in the midfield before his Red Bull move.
- 3 — Max Verstappen (from 2026): After years as 33, Verstappen switched to 3 for personal reasons, making it one of the most-watched number changes in recent memory.
- 6 — Nico Rosberg: Used in honour of his father Keke Rosberg, who won the 1982 World Championship with the same number.
These stories matter because they show that driver numbers are not arbitrary. They are decisions that drivers make early in their careers and live with for years, and the best ones create an association that outlasts any single team or season.
What happens to numbers when drivers leave
When a driver retires or loses their seat, their number enters the two-season protection period. During that window, no other driver can claim it. After the protection expires, the number returns to the available pool.
This system has produced some interesting moments. When Kevin Magnussen returned to F1 in 2022 after a one-year absence, his number 20 was still in the protection period, so he kept it. When Fernando Alonso returned in 2021 after two years away, his number 14 had just left the protection window, and he reclaimed it.
The protection period also means that the grid never has two cars with the same number at the same time, which would create confusion for timing systems, broadcast graphics, and fans trying to follow the race.
Where fans get confused
The biggest source of confusion is number 1. Many newer fans assume the champion must use it, but it is a right, not an obligation. When the grid starts without a number 1 car, that is not a mistake — it is the champion choosing their own number instead.
Another confusion is around rarely seen numbers. Some fans assume that numbers not currently on the grid are banned or unlucky. In most cases, they are simply still in the protection period from a former driver, or nobody in the current field wanted them.
A third confusion involves the number 13. It is not banned — it is available in the normal pool — but it is rarely chosen. Pastor Maldonado used 13 during his F1 career. The absence of 13 is cultural preference, not regulation.
Why permanent numbers changed F1 for the better
Before 2014, following a driver across seasons required learning a new number every year. The permanent system solved that by giving each driver a stable identifier that fans, broadcasters, and timing systems could rely on.
The change also created commercial value. Driver numbers now appear on merchandise, in branding, and across social media. A number like 44 or 77 is not just a racing identifier — it is a commercial asset that the driver owns and can carry between teams.
Most importantly, the permanent numbering system gives F1 fans an anchor in a sport defined by constant change. Regulations shift. Cars evolve. Teammates come and go. The number on the car stays the same, and that continuity helps turn a driver from a name on an entry list into a figure fans can follow across an entire career.