Formula 4 emerged as a response to two converging problems in junior motorsport. National Formula 3 championships had become prohibitively expensive, causing several to be discontinued as drivers opted instead for routes through Formula Renault, GP2, or GP3. Simultaneously, a proliferation of unrelated categories carrying the Formula 4 name had developed with no common specifications between countries, making cross-series comparisons impossible.
Former Formula One driver Gerhard Berger was appointed as FIA Single-Seater Commission president to oversee the category's creation. The FIA set an aspirational annual budget target of under 100,000 euros per entry. In practice this figure has been exceeded in most championships: the 2022 French Formula 4 series cost approximately 118,000 euros to contest fully equipped, while a realistic championship campaign in the now-defunct German ADAC Formula 4 series was estimated at over 350,000 euros, a principal reason for that series' eventual cancellation.
Formula 4 cars use four-cylinder engines, which may be normally aspirated or turbocharged, with a maximum power output of 140 kW. Each engine must last at least 10,000 kilometres and carry a maximum purchase price of 14,000 euros. The regulations permit only four-cylinder units and cap top speed at approximately 240 km/h, placing the cars above road-legal supercars in braking and cornering capability while remaining well below Formula 3. Individual championships specify a single engine supplier, and engines are equalised across series so that no national F4 championship produces markedly faster cars than others.
Four chassis manufacturers have received FIA homologation: Tatuus, Mygale, Dome, and Ligier. Two generations of chassis have been certified, with updated homologation requirements tightening structural and commercial criteria. Individual championships typically specify one approved chassis, making F4 a de facto single-make series within each jurisdiction.
In terms of aerodynamic grip, Tatuus F4 cars — virtually identical across multiple championships — generate peak lateral cornering acceleration of approximately 2.0g. This is far above a typical road car's maximum of under 1g, but meaningfully below Formula 3 cars which reach around 2.5g. The gap to Formula One is illustrated by the Silverstone circuit: the fastest qualifying lap at a 2023 F4 round there was 2:01.651, while the 2024 British Grand Prix Formula One pole lap was 1:25.819. Against production-derived categories, however, F4 cars are substantially quicker: the F4 pole time is roughly two seconds faster than a Porsche Carrera Cup lap record and around ten seconds faster than a TCR Touring Car lap record.
As of 2025, the FIA recognises thirteen official F4 championships. These are designated as national or regional series and approved as the formal F4 series for their territories, allowing drivers to earn FIA Super Licence points required for Formula One eligibility. For a series to qualify for Super Licence points, it must run at least five events at a minimum of three separate circuits per season, per FIA Appendix L. While called national championships, some events are contested at circuits across multiple countries. A Formula 4 race also forms part of the biennial FIA Motorsport Games, alongside disciplines including karting, drifting, rallying, and esports.
Several non-FIA-sanctioned championships run to current or former F4 specifications and remain active, though their competitors do not earn Super Licence points through those series.
Several F4 championships have been discontinued. The BRDC Formula 4 Championship in the United Kingdom ran from 2013 using FIA-aligned regulations and the Tatuus F4-T014 chassis from 2015, but was never officially recognised as an FIA championship. In 2016 it was upgraded and renamed the BRDC British Formula 3 Championship, now running as GB3 to Formula Regional specifications. The ADAC Formula 4 Championship in Germany operated from 2015 to 2022 before ADAC announced in December 2022 that the series would not continue for 2023, citing insufficient driver numbers driven by high costs; German junior drivers were redirected toward the French F4 championship instead. Formula Academy Sudamericana, which debuted in 2014 using the Signatech chassis and Fiat engines from the former Brazilian Formula Future Fiat, folded after the 2019 season. A single-season F4 Argentina Championship ran in 2021. Formula Academy Finland, based in Finland from 2018 using the Tatuus-Abarth FIA Formula 4 car, operates without FIA approval and runs alongside older Formula 3 machinery as part of the Finnish Championship Series' Formula Open Finland category.
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