A yellow card in soccer is a referee’s official warning for a player, substitute, or team official who commits a cautionable offense. It does not remove the player from the match, but two yellow cards in the same game usually become a red card and a send-off.

What it means

A yellow card tells everyone that the referee has recorded misconduct and that the person needs to be more careful. It is often described as a player being “booked”.

Common reasons

Typical reasons include:

  • Reckless tackles.
  • Dissent toward the referee.
  • Time-wasting.
  • Simulation or diving.
  • Unsporting behavior.

What happens next

After one yellow card, the player can usually keep playing. After two yellow cards in the same match, the referee shows a red card and the player must leave the field.

Simple example

If a defender pulls back an attacker to stop a promising move, the referee may show a yellow card as a caution. If that same player later argues aggressively with the referee, a second yellow could end their night early.

Rule context

Yellow cards are part of the game’s discipline system and are used to keep play fair and under control. They can also matter beyond one match, because repeated bookings in a tournament or league can lead to suspensions.