Substitutions in football: how the five substitute rule and the three windows work

A team can make up to five substitutions, spread across three windows, and anything done at half time is free. That is the short answer. Law 3 of the Laws of the Game does not force any competition to allow five. It sets five as a ceiling and hands the decision to whoever runs the competition, whether that is FIFA, a confederation or a national football association. A competition is free to allow fewer. The three window limit applies where the rules do allow five.

The cap of three windows does not apply to every match. Law 3 restricts it to men's and women's competitions involving the first teams of top division clubs and senior 'A' international teams, and only where the competition rules permit a maximum of five substitutes. The 2026 World Cup is built exactly that way: article 36.2 of the tournament regulations says each team may use a maximum of five substitutes. Outside that bracket, the number depends on whoever writes the rules.

A window is an opportunity to substitute, not a player. Each team gets three of them per match. Send on two or three players at the same stoppage and you have spent one. If both teams make a change at the same moment, the window counts against each of them, as the 2026 World Cup regulations spell out. The reasoning has been on the record since day one: the IFAB wanted to avoid disruption to the game. Without the cap, five changes would mean five interruptions.

The climb to five substitutions

For decades, Law 3's answer to an injured player was none at all. The IFAB's own archive, which holds the Laws of the Game booklets going back to the 1957-58 edition, records the flat prohibition that stood until then: replacing a player in a competition match was not permitted, not even for injury. There was no bench to fall back on, and a team that lost a player to a serious injury simply finished the match a man short.

The first crack came in 1958: the Law began allowing one substitute per team, but only when an injury stopped a player from continuing, and only with prior approval from the national or international association involved. The permission arrived and then sat almost unused on the game's biggest stages. The 1958 World Cup in Sweden, the 1962 tournament in Chile and the 1966 tournament in England were all played out without a single substitution, even with the rule already on the books.

It was the English league that used the loophole first. On 21 August 1965, at Burnden Park, Charlton Athletic goalkeeper Mick Rose was injured after 11 minutes against Bolton Wanderers, and Keith Peacock came on in his place, the first substitute in English professional football history. The local rule, approved by the clubs themselves two months earlier, also tied the change to injury: no swapping a player for tactical reasons.

The shift to any reason, not just injury, came in 1967: the Law began allowing two substitutes per team, in both friendlies and competition matches authorised by the association involved. FIFA, though, only used that permission at a World Cup for the first time three years later, in Mexico. The first came from the Soviet Union, against host nation Mexico, on 31 May 1970, at the Estadio Azteca: coach Gavril Kachalin withdrew Viktor Serebryanikov and sent on Anatoli Puzach at half time.

The third substitute arrived in two stages. The 1994 Law, in force at the World Cup in the United States, added an extra substitute, but only if named as a reserve goalkeeper: that is how Italy sent on Luca Marchegiani for Gianluca Pagliuca, sent off against Norway. The restriction fell in the next edition of the Law, 1995-96: three free substitutions, for any reason, with no position attached, the same formula the 1998 World Cup in France used from the start.

The 2018 World Cup in Russia added a fourth substitution, but only for teams reaching extra time, with any changes unused in normal time carrying over there too. The first to use that extra slot was Russia's Aleksandr Erokhin, brought on in the round of 16 against Spain. From there to the five-substitute option that the pandemic pushed the whole game to adopt, the gap was short: under two years.

A temporary rule made permanent

Five substitutions began life as an emergency measure. On 8 May 2020, following a FIFA proposal, the IFAB allowed the option because of the covid-19 pandemic and the congested calendar, leaving each competition organiser to decide whether to use it. The three opportunities were written in from the start, so the extra changes would not chop the match into pieces. Substitutions at half time were allowed in that first statement too.

The temporary fix became law in the 2022/23 edition of the Laws of the Game. The decision came from the IFAB's 136th Annual General Meeting, announced on 13 June 2022, and took effect on 1 July 2022. The same decision confirmed the restriction of three substitution slots plus half time. FIFA's official site records the same date, the same meeting and the same start of validity. What began as a pandemic patch is now simply the text of Law 3.

The five-substitute option nearly died before it became a fixed rule. On 16 December 2020, the IFAB extended the temporary Law 3 amendment for domestic competitions ending by 31 December 2021 and for international competitions ending by 31 July 2022, always subject to further review. It took the June 2022 Annual General Meeting to close that chain of extensions and drop the word temporary from the text.

That same 2022 meeting changed another number that tends to go unnoticed: the ceiling on substitutes named on the team sheet, which rose from twelve to fifteen, at each competition's discretion. That is the ceiling that explains why a match-day squad can carry as many as fifteen players on the bench, not the ceiling of five that can actually be used.

Half time changes do not cost a window. This is the loophole modern coaching lives on: make two or three changes in the dressing room and you come out for the second half with all three windows untouched and fresh legs still on the bench. Those substitutions still count towards the total of five, but not towards the opportunities. That is why so much happens at the interval, even when nobody is injured.

Nothing is wasted in extra time. Substitutes and windows left over from normal time carry across. And where the competition rules provide for it, each team gets one more substitute and one more window, even a side that has already used everything. In practice that means up to six changes and up to four windows. The break before extra time and the break inside it do not count as opportunities either. Manage the bench well and you go into extra time with fresh legs and a window in hand.

Who can be substituted, how, and with what punishment

The list of substitutes closes before kick-off: a name left off it simply does not play in that match. A substitution is not the wave from the touchline either, under Law 3 it is a precise instant. It is only completed once the substitute sets foot on the pitch, and that is exactly when the two roles swap: the player going off becomes a substituted player, with no further part in the match, and the player coming on takes on every right of a player in the field, including taking the next free kick or a penalty that comes up moments later. Until that instant, nothing is definitively settled, and the bench can still change its mind about who goes in.

Not every red card costs the bench a place, and Law 3 is precise about the timing. A player sent off before the team sheet is handed to the referee cannot be named at all, not as a starter and not as a substitute. Sent off after being named but still before kick-off, he can be replaced by a substitute already on the list, without it counting against the team's substitution total. Once the ball is rolling, the rule closes for good: a dismissed starter leaves the team a player short with no replacement possible, and the same applies to a dismissed substitute, who cannot be swapped for another name from the bench either.

Once substituted, a player does not set foot on the pitch again in that match, with one narrow exception. Law 3 reserves the right to return to youth, veterans', disability and grassroots football, and even then only where the national association, the confederation or FIFA specifically authorises it for that competition. In the elite game the door stays shut: no top-flight league or senior 'A' team has that option, which is why a coach never pulls a player just to give him a breather and bring him back on minutes later.

The concussion substitution rule

The concussion substitution sits outside the whole system. It is additional and permanent: one per team per match, available even to a side that has already used all five normal changes. It does not eat a window, because it is counted separately from the limit on normal opportunities. Permanent is meant literally, as the player with concussion or suspected concussion takes no further part in the match. The call belongs to the team's medical staff, not to the referees. And the opposing team then receives an additional substitute and an additional window.

The permanent version was not the only one tested. On 16 December 2020, the IFAB opened an extensive trial of the concussion substitute starting in January 2021, at the same meeting that extended the five-substitute experiment. The trial stuck to the permanent format only. On 18 January 2023, the IFAB turned down a joint request from the global players' union, FIFPRO, and leagues including the Premier League and Ligue 1, to also trial a temporary version modelled on rugby's concussion protocol, in which the assessed player can return to the field minutes later. The opposite logic won out: take the player off, and do not take the risk.

In practice, the team opting for a concussion substitution flags it to the referee with a card or form in a different colour from the usual one, to set the request apart from the rest of Law 3. The opponent does not have to use the extra slot straight away: it can be used at any point afterwards, even separately from the concussion substitution itself. And the final word on whether there is an injury is never the referee's, it belongs to each team's medical staff, which keeps a clinical judgement out of hands that have no way to make it properly.

None of that is automatic. The concussion substitution is a competition option, approved at the IFAB's 138th Annual General Meeting in Scotland on 2 March 2024 and in force since 1 July 2024. Competition rules also set how many substitutes may be named, from three to a maximum of fifteen. At the 2026 World Cup the match list holds up to 26 players: 11 starters and up to 15 substitutes. And the moment matters, because a substitution is only complete when the substitute enters the field of play.

Since 1 July 2026 the walk off the pitch is part of the rule. A substituted player has ten seconds to leave the field, counted from the moment the fourth official shows the board, or from the referee's signal where there is no board. Take longer and the team plays short for a while: the substitute may only come on at the first stoppage after one minute of running time has passed since the restart. The IFAB presented the measure as a way to cut time wasting.

Outside the elite the picture changes. In other matches the two teams may agree on a larger number of substitutes before the game and tell the referee; without such an agreement the ceiling is six per team. In senior 'A' friendlies the number rose to eight from 1 July 2026, and can reach eleven if both teams agree. And only in youth, veterans, disability and grassroots football may a substituted player return to the pitch.

How many substitutions each competition allows

The rule barely changes between the elite competitions, but the details left over from the comparison are worth the whole exercise. Every one of the nine competitions below has adopted Law 3's five substitutes and three windows, without exception, which already shows how the 2022 text became a universal standard. The difference shows up in the small print: who extends it into extra time, who writes the number down themselves, and who just points to the international rule.

The table hides a design difference that only shows up in each competition's own regulations. In the Champions League, the sixth substitution and fourth window apply throughout the entire knockout phase, from the play-off round to the round of 16, and in the final too. In the Copa Libertadores, that same right exists only in the final: from the preliminary stage to the semi-finals, a tie on aggregate goes straight to a penalty shoot-out, with no extra time at all. And not every body writes its own number down: CONMEBOL's manual sets the five substitutions out in its own text, but simply points to IFAB's regulations for the three windows, rather than restating the figure. The Premier League, for its part, reached today's rule later than the rest of Europe: it voted down the five-substitute option three times between August and December 2020, kept three changes throughout the 2021/22 season, and only started using five in the 2022/23 season.

Bench and concussion sub: each competition's own choices

Two figures are often confused, and they are not the same figure. One is how many a team can use during the match: up to five, as already covered. The other is how many it can name on the bench before kick-off, and there Law 3 itself opens a much wider range, from three to fifteen names, leaving each competition to pick its own point inside it. A bigger bench does not change the ceiling on changes covered above, it only gives the coach more options for which five to pull from within that same limit.

The bench lays bare choices that Law 3 leaves wide open, anywhere from three to fifteen named substitutes. Serie A and the World Cup use the ceiling, fifteen; the Premier League, the Bundesliga and Ligue 1 sit at the continent's more common floor, nine. And the extra concussion substitute, available to any competition since 1 July 2024, splits the group: six of the nine have adopted it, three have not, including two notable absences given their size, the Champions League and the Bundesliga. Brazil, for its part, got there ahead of everyone: the CBF authorised the concussion substitute back in April 2024, before the definitive rule even took effect on the IFAB's own calendar, on 1 July that year.

The tactical effect of five substitutions

Five well-managed substitutions amount to almost half a team's worth of fresh legs from the 60th minute onward. The most obvious effect is physical: less accumulated fatigue, fewer late-match injuries, and a pressing rhythm that no longer drops as sharply as it did with only three changes. The tactical effect is more interesting and gets talked about less. A coach who sits in a low block and cedes possession can switch the entire system around the 70th minute, moving from a defensive 5-4-1 to a 4-2-4 with fresh legs up front, turning the result into ten minutes of controlled chaos against an opponent who has already used up his own options.

A squad built to rotate two players per position turns the substitution window into a second lineup, not an emergency measure: clubs planning for a full season with a congested fixture list treat the fifth substitute as a tactical piece designed weeks in advance, not a last-minute bench call. Counter-pressing sustained by a pacey forward who comes on fresh in the 75th minute against a back line that has already covered 10 extra kilometres is as deliberately engineered a weapon today as any training-ground corner routine. That is the modern bench: part of plan A, no longer plan B.

The most repeated criticism is a direct one: five substitutions favour whoever already has the expensive squad, because only a deep roster can name fifteen substitutes close in level to the starting eleven. A club that lives off a single strong XI, without depth, gains an extra window and has nobody to fill it beyond an unproven academy kid. The counter-argument is also tactical, not just financial: the extra window is just as useful for protecting a result, and a smaller club that goes ahead early can spend all five changes shutting down space and killing the game, something that was far riskier to sustain through a final 30 minutes with only three changes available. The ruler does not always tip toward the fuller vault.

In the end, the five-substitute rule did not invent a new game, it just moved the clock on the old one: what used to be decided between the 70th and 90th minute, back when the bench barely moved, now also gets decided in the 15 minutes the stands barely notice, between the third window and the final whistle. Whoever reads that window better than the opponent, not whoever has the pricier squad on paper, is usually the one who walks away with the result.