How Many Substitutions Are Allowed in Soccer? Rules, Concussion Subs & Extra Time
Under permanent IFAB Law 3 regulations, professional soccer teams are permitted up to 5 substitutions per match, conducted across a maximum of 3 substitution opportunities (windows), plus the halftime interval. Additional concussion substitutions and sixth extra-time substitutions apply in major competitions. Here is the complete breakdown of rules across the Premier League, UEFA Champions League, MLS, and international tournaments.
Table of Contents
- Quick Answer: How Many Subs Are Allowed?
- From 3 to 5: The Permanent IFAB Law 3 Evolution
- The 3-Window Rule: Preventing Clock Stoppages
- Extra Time & Knockout Matches: The 6th Substitution
- Permanent Concussion Substitutes Protocol
- Roster & Bench Sizes Across Major Competitions
- Tactical Impact: Five Subs and Modern Game Intensity
- Frequently Asked Questions
Key Guide Takeaways
- Standard professional soccer permits 5 substitutions per team in regulation time.
- Teams are limited to 3 in-game substitution windows to prevent clock-wasting stoppages.
- Substitutions made at halftime do not consume one of the 3 in-game windows.
- Knockout matches that enter extra time allow a 6th substitution and an additional window.
- Permanent concussion substitutes provide an extra substitution beyond the regular 5-sub allocation.
Quick Answer: How Many Subs Are Allowed?
In top-tier professional soccer, each team is permitted to make up to five (5) substitutions during a standard 90-minute match.
To prevent teams from constantly disrupting match flow and wasting game clock, IFAB Law 3 mandates that these 5 substitutions must be conducted in a maximum of three (3) in-game windows (stoppages of play), plus the halftime interval. Substitutions made at halftime do not count against the 3 in-game window limit.
In knockout competitions where a tied match goes into 30 minutes of extra time, teams are typically granted one additional sixth (6th) substitution and one additional substitution window. Furthermore, many modern competitions implement permanent concussion substitute protocols that do not count against standard substitution limits.
Allowed Subs: Up to 5 players | In-Game Windows: Maximum of 3 windows | Halftime: Free window (does not count toward the 3) | Extra Time: 1 additional sub (6th sub) allowed in knockout games.
From 3 to 5: The Permanent IFAB Law 3 Evolution
For decades leading up to 2020, professional soccer permitted only three substitutions per match. When the global sports calendar faced extreme fixture congestion in May 2020, IFAB introduced a temporary amendment allowing five substitutions to protect player welfare, reduce soft-tissue injury risk, and manage player fatigue.
Following extensive medical data and positive feedback from coaching staffs and players, IFAB officially codified the 5-substitution rule into permanent law in the official Laws of the Game effective June 2022. Today, the English Premier League, UEFA Champions League, La Liga, Serie A, Bundesliga, Major League Soccer (MLS), and FIFA World Cup all operate under the permanent 5-sub regulation.
The 3-Window Rule: Preventing Clock Stoppages
Allowing five substitutions created an initial concern: could a manager make five separate single substitutions in the final 10 minutes to kill match momentum? IFAB solved this by creating the "Three-Window" restriction:
• In-Game Stoppages: A team may only stop play to make substitutions on three occasions during the 90 minutes. A manager can substitute one, two, or three players simultaneously in a single window.
• Halftime Exemption: Any substitution made during the 15-minute halftime break does not count as one of the three windows.
• Shared Windows: If both teams make a substitution during the same stoppage of play, it counts as one used window for each team.
• Unused Substitutions: If a team uses all three windows but has only brought on 3 or 4 players, they cannot make their remaining substitution during regulation play, unless the match enters extra time or a concussion substitution is invoked.
Extra Time & Knockout Matches: The 6th Substitution
In knockout competitions (such as the UEFA Champions League knockout stages, FA Cup, or FIFA World Cup knockout rounds), tied matches proceed to 30 minutes of extra time (two 15-minute halves).
Under competition regulations, if a match reaches extra time:
• Sixth Substitute: Each team is granted one additional substitution, raising their total allowance to six (6) players.
• Fourth Window: Each team is granted one additional in-game substitution window during extra time.
• Break Intervals: Substitutions made between the end of regulation and the start of extra time, or during the halftime interval of extra time, do not count against the extra-time in-game window.
• Carried-Over Subs: Any unused substitutions or windows from regulation time carry over into extra time.
Permanent Concussion Substitutes Protocol
Player safety and head trauma management have driven recent IFAB advancements. In 2021, IFAB launched trials for permanent concussion substitutions, which were formally incorporated into competition options in 2024:
• Dedicated Allowance: If a player sustains a suspected head injury or concussion, the team may replace them with an additional concussion substitute that does NOT count against their 5 regular substitutions or 3 windows.
• Fair Play Mechanism (Opposition Match): In competitions using Protocol B (including the Premier League and MLS), when a team uses a concussion substitution, the opposing team is automatically granted an additional regular substitution to maintain competitive sporting balance.
Roster & Bench Sizes Across Major Competitions
While the number of players allowed onto the pitch is five, the number of players permitted to sit on the substitute bench varies by competition:
• Premier League: 9 named substitutes on the bench (can use 5).
• UEFA Champions League: 12 named substitutes on the bench (can use 5).
• FIFA World Cup: Up to 15 substitutes on the bench (full 26-man roster).
• Major League Soccer (MLS): 9 named substitutes on the bench (can use 5).
Any player not named on the official team sheet prior to kickoff cannot participate in the match.
Tactical Impact: Five Subs and Modern Game Intensity
The shift to five substitutions has fundamentally reshaped tactical soccer. Rather than viewing the squad as a "starting 11" and backups, managers now plan for 16-player match units.
High-pressing managers (such as Pep Guardiola, Jürgen Klopp, and Mikel Arteta) can replace an entire attacking frontline or midfield pivot at the 60-minute mark, maintaining relentless sprinting, counter-pressing, and defensive intensity for the full 90 minutes. It has also magnified the advantage of deep, well-financed squads capable of bringing world-class talent off the bench.
Frequently Asked Questions
Common questions regarding soccer substitution rules and regulations:
Frequently Asked Questions
Can you substitute a player back on after taking them off?
No. In standard professional soccer, return substitutions are not allowed. Once a player is substituted off, they cannot return to the match. (Some grassroots youth leagues allow roll-on/roll-off substitutions, but professional competitions do not).
Do halftime substitutions count toward the 3 windows?
No. Halftime substitutions do not count against the three in-game windows. A manager can make changes at halftime without burning any in-game windows.
What happens if a player gets injured after all substitutions are used?
If a team has used all available substitutions and a player gets injured and cannot continue, the team must play the remainder of the match with 10 players (or fewer).
Can a goalkeeper be substituted during a soccer game?
Yes. Goalkeepers can be substituted at any time during a stoppage of play just like outfield players, subject to the standard 5-substitution and 3-window limits.