Pass Interference in Football: Rules, Penalties, and Examples

A receiver has a step on a cornerback, the quarterback lets the ball go, and suddenly the defender grabs an arm. The flag that follows can swing a drive—or decide a game. Pass interference is one of football’s most consequential penalties, but the key question is not simply whether players made contact. It’s whether someone unfairly restricted an opponent’s chance to play the ball.

What pass interference means

Pass interference, often shortened to PI, is illegal contact that significantly hinders an eligible player’s opportunity to catch a forward pass while the ball is in the air. It can be called on the defense or the offense. In either case, officials judge the timing and effect of the contact, not just whether a hand touched a jersey.

The rule protects both sides. A defender can’t hold, grab, or run through a receiver to prevent a catch. A receiver can’t push off or otherwise create an unfair advantage by restricting the defender. Players are allowed to compete for position and make incidental contact; they aren’t allowed to take an opponent out of the play.

Defensive pass interference

Defensive pass interference occurs when a defender illegally hinders an eligible offensive player while a forward pass is in flight. Common examples include:

• Grabbing or hooking a receiver’s arm before the ball arrives.
• Holding a receiver’s waist or jersey to slow the route.
• Driving through the receiver rather than trying to locate and play the ball.
• Cutting off the receiver’s path without making a legitimate attempt to play the pass.

Consider a deep route down the sideline. The receiver looks back and reaches for the ball, while the cornerback keeps running into the receiver and never turns to find it. If that contact materially prevents the receiver from making the catch, officials may call DPI. By contrast, two players leaping and reaching for the same pass can collide legally if neither unfairly restricts the other.

There’s also an important timing distinction: pass interference applies while the ball is in the air. Contact before the throw may instead be called as holding or illegal contact, depending on the play and the rules in that league. If the pass is tipped, the restrictions on pass interference generally end and players can compete for the ball, though other fouls may still apply.

Offensive pass interference

Offensive pass interference, or OPI, is usually called when a receiver uses contact to gain an unfair advantage. A classic example is a receiver extending an arm and shoving a cornerback away just before the ball arrives. A receiver who grabs a defender or blocks that player downfield too early can also draw a flag in situations covered by the league’s rules.

Not every hand placement is a foul. Receivers use their hands to release from press coverage and protect their route, and defenders do the same while staying within the rules. Officials look for forceful contact that creates separation, redirects an opponent, or prevents that player from making a play.

When contact is allowed—and why the league matters

Rules differ between the NFL and college football, so a play that looks similar can be judged differently. In the NFL, a defender generally has a five-yard zone from the line of scrimmage in which legal contact may be made with a receiver, provided the defender does not hold or otherwise commit a foul. Beyond five yards, illegal contact can be called before the pass is thrown; once the pass is in the air, contact that unfairly hinders the receiver may be DPI.

College football does not use the NFL’s same five-yard contact allowance. Its rules restrict contact that impedes an eligible receiver beyond the neutral zone while a forward pass is in flight. College and NFL rules also differ in how pass-interference penalties are enforced, so it’s worth knowing which game you’re watching.

Across both levels, incidental contact is not automatically PI. Nor is a defender required to avoid all contact while trying to intercept or bat down the ball. The central judgment is whether a player’s actions materially restricted an opponent’s opportunity to make the play.

What happens after a pass-interference flag?

The penalty can be especially valuable because it may award yards and keep the offense’s drive alive. In the NFL, defensive pass interference is generally enforced from the spot of the foul, with an automatic first down. If the foul occurs in the end zone, the ball is placed at the one-yard line. There is a 15-yard maximum for DPI when the foul occurs more than 15 yards downfield.

In college football, defensive pass interference is generally a 15-yard penalty from the previous spot and an automatic first down. If the goal line is less than 15 yards away, the penalty is reduced to half the distance to the goal.

Offensive PI usually costs the offense yards instead of awarding them. In the NFL, it is generally a 10-yard penalty from the previous spot. In college, it is generally 15 yards from the previous spot and includes a loss of down. Exact enforcement can depend on the play’s circumstances, but the basic contrast is clear: defensive PI can give the offense a fresh set of downs, while offensive PI makes the next attempt harder.

Why pass interference can be hard to judge

Officials often have to make the call in a split second, with players moving at full speed and the ball arriving from a different angle. A receiver may appear to be held, but still have a fair chance to catch the pass. A defender may appear to be looking for the ball, yet make contact that plainly knocks the receiver off course. The flag is about the effect of the contact as well as how it happened.

Catchability matters, too. If a pass sails far out of bounds or is so far over a receiver’s head that no realistic catch is possible, defensive PI generally should not be called. That prevents a defender from being penalized for contact that did not take away a genuine opportunity to catch the ball.

Related Articles

• What Is Holding in American Football? Rules and Penalties Explained
• What Is an Onside Kick in American Football? Rules and Strategy
• What Is Delay of Game in American Football? Rules & Penalties

Frequently Asked Questions

Can pass interference be called before the ball is thrown?

No. Pass interference applies while a forward pass is in the air. Earlier contact may still be a foul, such as defensive holding or illegal contact, depending on the play and the league’s rules.

Does every collision between a receiver and defender count as PI?

No. Incidental contact and ordinary competition for position are allowed. A flag is more likely when one player grabs, pushes, or otherwise significantly restricts the opponent’s chance to play the ball.

Can a pass that is not catchable still draw a DPI flag?

Generally, no. If the ball is clearly beyond the receiver’s realistic reach, the contact did not take away a genuine chance to make the catch. Officials make that judgment based on the play.

Is defensive pass interference a bigger penalty in the NFL or college football?

It can be, particularly on a long pass. NFL DPI is generally enforced from the spot of the foul, subject to a 15-yard maximum for fouls farther downfield. College DPI is generally 15 yards from the previous spot.

Final Thoughts

Pass interference is about protecting a fair chance to catch a forward pass—not banning contact altogether. Watch for when the contact happens, whether a player is genuinely trying to play the ball, and whether the contact changes the opponent’s opportunity. Those details explain why a flag may appear obvious on one snap and debatable on the next.