How IndyCar Racing Works, Rules, Cars, and Race Weekend Format

Quick Answer

IndyCar is North America's premier open-wheel racing series, featuring purpose-built cars that race on permanent road courses, temporary street circuits, and high-speed ovals. The series operates on a points-based championship system, with the 2026 season expanding to include new street races in Washington, D.C., while the crown jewel remains the Indianapolis 500.

Key Facts

• The 2025 season featured 17 races running from March 2 through August 31, with the season finale at Nashville Superspeedway
• Alex Palou won the 2025 drivers' championship, his fourth title, driving for Chip Ganassi Racing with a Honda engine
• Palou recorded 5 wins and 6 poles across 12 starts during the 2025 season
• Honda won the 2025 Manufacturers' Cup; Louis Foster was named Rookie of the Year
• The 2026 season introduces a new street course race in Washington, D.C.
• Will Power left Team Penske after 17 seasons to join Andretti Global for 2026
• The Thermal Club race became a full points-paying event in 2025 after being a non-championship event in 2024
• Race lengths were extended for six races starting in 2025
• The 2025 points system awards 50 points for a win, descending to 5 points for 25th place

The Anatomy of an IndyCar What Makes These Machines Different

The cars that compete in the NTT IndyCar Series are among the most specialized racing machines in the world. Understanding what's under the bodywork helps explain why IndyCar races look and sound the way they do.

Chassis and Safety Cell

Every team in the series uses the same chassis manufacturer, which keeps competition focused on setup, strategy, and driver skill rather than engineering budgets. The current-generation car features a carbon-fiber monocoque that surrounds the driver, with the engine mounted behind the cockpit.

This open-wheel configuration means the wheels are exposed, which creates the signature aerodynamic turbulence that makes close racing both thrilling and technically demanding. The chassis is designed to work across three completely different track types.

On road courses like Road America or Portland International Raceway, the car runs with maximum downforce configuration. On street circuits like St.

Petersburg or the new Washington, D.C. course, the cars use higher downforce setups to handle tight corners and concrete walls.

On ovals like Iowa Speedway or the Milwaukee Mile, teams strip downforce off the car to reduce drag and achieve higher straight-line speeds.

Engine Options and Manufacturers

Two engine manufacturers currently supply the series: Honda and Chevrolet. Both produce 2.2-liter twin-turbocharged V6 engines.

These engines are engineering marvels because they must survive the most demanding race on the calendar—the Indianapolis 500—where they run at full throttle for extended periods, as well as street circuits where they spend significant time in lower gears, generating tremendous heat. The 2025 season saw Honda take the Manufacturers' Cup, the award given to the engine builder whose drivers accumulate the most points across the season.

This manufacturer competition adds another layer of intrigue to the championship, as engine performance and reliability directly affect team results.

The Push-to-Pass System

One of the most distinctive features of modern IndyCar racing is the push-to-pass system. Drivers have a limited amount of extra horsepower they can deploy during a race, typically measured in seconds of use.

This system creates strategic depth because drivers must decide when to use their reserve power—whether to attempt a pass, defend a position, or save it for the closing laps. The system is especially critical on ovals, where passing without it can be nearly impossible due to the aerodynamic wake of the car ahead.

On road and street courses, push-to-pass can be the difference between completing a pass on a straightaway or being stuck behind slower traffic.

The Race Weekend Format From Practice to Checkered Flag

Unlike some racing series that compress their schedules into a single day, IndyCar race weekends typically span three days. Understanding this format helps explain why the series rewards consistency and preparation.

Friday Practice and Preparation

The weekend begins with practice sessions that allow teams to dial in their setups. Because IndyCar schedules often pair road courses and street circuits back-to-back, teams arrive with baseline setups but must adapt to the specific characteristics of each track.

Surface grip levels, temperature, and track evolution all factor into how teams approach practice. For street courses, Friday practice is especially critical because the track surface is often dirty from street use before the racing weekend begins.

As cars lay down rubber, lap times drop dramatically, and teams must anticipate how much the track will improve by qualifying day.

Saturday Qualifying and More Practice

Qualifying determines the starting grid and is typically split into groups. The format varies by track type.

On road and street courses, drivers compete in rounds, with the fastest advancing to later sessions. This knockout-style qualifying creates dramatic moments as drivers push to the limit with the clock ticking down.

On ovals, qualifying is often a single-lap shootout, with each car taking one timed lap. Because oval racing relies heavily on track position, qualifying well on ovals is arguably more important than on road courses, where passing opportunities are more frequent.

The 2025 schedule showed how the series balances these formats. The Iowa Speedway doubleheader featured two races in one weekend, with each race having its own qualifying session.

This format rewards teams that can adapt quickly between races and manage their equipment through double the racing distance.

Sunday Race Day

Race distances vary significantly across the calendar. Some races are timed events, while others have a set lap count.

The 2025 season saw INDYCAR extend race lengths for six events, a move designed to add more strategic complexity through additional pit stop cycles. Pit strategy often determines race outcomes.

Because the series uses a spec fuel cell and limits pit crew size, teams must decide between different tire compounds and fuel strategies. Some races become fuel-saving contests where drivers lift off the throttle early to stretch their final stint, while others are flat-out sprints with multiple pit stops.

The Indianapolis 500 stands apart from other races on the calendar. It carries its own qualifying format, with cars attempting four-lap averages to secure their starting positions.

The race itself is 500 miles, making it the longest and most physically demanding event of the season. The 110th running of the Indianapolis 500 was scheduled as part of the 2026 season, continuing the race's status as the centerpiece of American motorsports.

The 2026 Season New Faces, New Places

The 2026 season represents a period of significant transition for the series. Several storylines have developed that will shape the championship battle.

Will Power's Move to Andretti Global

The biggest driver market news of the offseason was Will Power's departure from Team Penske after 17 seasons. Power, who has been one of the series' most successful drivers, will join Andretti Global for 2026, switching from Chevrolet power to Honda power in the process.

This move reshapes the competitive landscape in several ways. Team Penske loses its veteran leader and one of its most consistent performers.

Andretti Global gains a driver with extensive experience and a proven ability to win races and championships. The 2025 season showed Power finishing 14th in the standings after 12 starts, with two top-five finishes and 65 laps led—a solid but not spectacular season that may have motivated the change.

For Andretti Global, adding Power alongside Kyle Kirkwood creates an interesting dynamic. Kirkwood has been developing into a consistent front-runner, and having a veteran teammate of Power's caliber could accelerate his growth.

The Inside Line panel noted Kirkwood's continued development as one of the storylines to watch in 2026.

The Washington, D.C. Street Race

The series announced that 2026 will include a new street course race in Washington, D.C. This represents a significant expansion into a major media market and adds a new challenge for teams that must prepare for an unfamiliar circuit layout.

Street courses present unique difficulties. The tracks are narrower than permanent road courses, walls are closer, and overtaking opportunities are limited.

Teams must balance aggression with caution, as one mistake can end a race day. The addition of a new street course requires teams to rely on simulation work and engineering analysis to prepare, since there is no prior data from the circuit.

Championship Contenders for 2026

Based on the 2025 season results, several drivers enter 2026 as legitimate championship threats. Alex Palou demonstrated remarkable consistency, with nine top-five and ten top-ten finishes in 12 starts.

His five wins and six poles established him as the benchmark. David Malukas finished second in points for Team Penske, showing that the team's Chevrolet-powered package remains competitive even after Power's departure.

Pato O'Ward and Josef Newgarden both won races in 2025 and will be looking to mount stronger championship challenges. The parity between Honda and Chevrolet engines, combined with the spec chassis, means driver and team execution will likely decide the 2026 title.

The Points System and Championship Structure

Understanding how points are awarded explains why IndyCar championships are often decided by consistency rather than raw speed.

How Points Are Distributed

The 2025 points system awarded 50 points to the race winner, with a sliding scale down through the field. The top ten finishers received 50, 40, 35, 32, 30, 28, 26, 24, 22, and 20 points respectively.

From 11th place onward, the drop-off becomes smaller, with 15th place earning 15 points and 25th place earning just 5 points. This structure means that finishing consistently in the top ten is more valuable than winning a single race and then suffering a poor result.

A driver who finishes fifth every race will accumulate more points than a driver who wins three races but finishes 20th in several others.

The Importance of the Indianapolis 500

The Indianapolis 500 awards double points, making it the single most important race on the calendar in terms of championship mathematics. This system ensures that the race maintains its historical significance while also creating strategic implications for the championship.

For example, in 2025, Alex Palou won the Indianapolis 500, which helped cement his championship lead. Drivers who perform well at Indianapolis can make up significant ground in the standings, while those who struggle there face an uphill battle for the remainder of the season.

Rookie and Team Dynamics

The series tracks multiple standings beyond the main championship. The Rookie of the Year award recognizes the top first-year driver.

Louis Foster won this honor in 2025, and the 2026 rookie class will be closely watched to see who can make an immediate impact. The 2026 rookie standings from early in the season showed Dennis Hauger leading among rookies with 12 starts, followed by Caio Collet and Mick Schumacher.

These drivers represent the next generation of IndyCar talent, and their development will be a storyline throughout the season.

Frequently Asked Questions

How fast do IndyCar cars go?

IndyCars are among the fastest racing cars in the world. On superspeedways like Indianapolis Motor Speedway, they exceed 230 miles per hour.

On road courses and street circuits, top speeds are lower—typically 180 to 200 miles per hour—but cornering speeds are extremely high due to aerodynamic downforce.

What is the difference between IndyCar and Formula 1?

IndyCar and Formula 1 are both open-wheel racing series, but they differ significantly. IndyCar uses a spec chassis with two engine manufacturers (Honda and Chevrolet), while Formula 1 features multiple chassis constructors and engine suppliers.

IndyCar races primarily in North America, while Formula 1 is a global series. IndyCar also races on ovals, which Formula 1 does not, and relies more heavily on team strategy and fuel management.

How many races are on the 2026 IndyCar schedule?

The 2025 season featured 17 races, and the 2026 season was expected to expand with the addition of the Washington, D.C. street race.

The 2026 schedule includes the Indianapolis 500, with the 110th running of the event being part of the season.

Why do some IndyCar races happen on street courses?

Street courses are temporary circuits built on public roads in cities like St. Petersburg, Long Beach, and now Washington, D.C.

These races bring the series to major population centers, allowing fans to experience IndyCar without traveling to permanent facilities. Street courses also create unique racing challenges due to their narrow layouts and unforgiving walls.

How does the push-to-pass system work?

Push-to-pass gives drivers a limited allocation of extra engine power that they can use during a race. The system is activated by a button on the steering wheel, and drivers accumulate time that can be deployed in increments.

This creates strategic decisions about when to use the boost—whether to attack, defend, or save it for the end of the race.

Reference Notes

Information in this article is based on publicly available sources. Some details may change over time.

Verify with official sources before acting.