The Basic Auto Sub Rule
If a player in your starting XI does not play in their match — no minutes on the pitch and no yellow or red card — FPL automatically replaces them with the highest-priority substitute who did play. Substitutions are processed after every match in the gameweek has finished, in the bench order you set.
Your bench has four places. One is your substitute goalkeeper, who can only ever replace your starting goalkeeper. The other three are outfield substitutes, ranked 1 to 3, and FPL tries them in that order for any outfield starter who did not play.
Auto subs are not available for players who play but underperform — only for players who do not play at all. If your striker starts but is taken off at half time, there is no auto sub. And a starter who is booked on the bench without ever coming on counts as having played, so he is not replaced either.
| Situation | What happens |
|---|---|
| Your goalkeeper does not play | Replaced by your substitute goalkeeper, if he played |
| An outfield starter does not play | Replaced by the highest-ranked outfield sub who played and keeps your formation legal |
| A starter is booked on the bench but never comes on | Counts as playing — he is not replaced |
| Your captain does not play | Your vice-captain's points are doubled instead |
| Captain and vice-captain both do not play | No one's points are doubled |
| You play the Bench Boost | Every bench player's points count — nobody needs replacing |
The Formation Constraint
Your XI must always contain exactly one goalkeeper, at least three defenders, at least two midfielders and at least one forward — the full limits are in the table below. An auto sub that would break them is not made.
The classic scenario: you start three defenders, one does not play, and your Sub 1 is a midfielder. Bringing him on would leave two defenders, so FPL passes over him and tries Sub 2, then Sub 3, and brings on the first who played and keeps the formation legal. With three defenders starting, that means a defender blank can only be covered by a bench defender — and the slot scores nothing if none of them played.
This is why many experienced managers start four defenders when their bench is weak. The fourth defender is a formation buffer: if one blanks, three remain, and any outfield substitute can come on.
| Position | Fewest in your XI | Most in your XI | In your squad |
|---|---|---|---|
| Goalkeeper | 1 | 1 | 2 |
| Defender | 3 | 5 | 5 |
| Midfielder | 2 | 5 | 5 |
| Forward | 1 | 3 | 3 |
Setting Your Bench Priority Order
You set bench priority during squad management — simply drag the bench players into your preferred substitution order on the FPL website or app. Sub 1 is first priority and comes on first if a starter blanks. If Sub 1 also does not play, Sub 2 is next; if Sub 2 does not play, Sub 3.
The optimal priority order depends on your squad. The general rule is: put the bench player most likely to play in Sub 1, and sequence the others by probability of playing in descending order. A bench midfielder from a top club on a rotation schedule should probably be Sub 1 over a budget reserve from a mid-table club, because the rotation midfielder is more likely to get minutes.
For double gameweeks, update your bench priority so the sub most likely to play twice is Sub 1: an auto sub with two fixtures brings two matches' worth of points into your XI, where a single-fixture alternative brings one.
Common Auto Sub Mistakes
Not updating bench order week to week is the most common mistake. A bench order set in GW1 may be completely wrong by GW20 when your squad composition has changed through transfers. Check bench priority at every deadline.
Forgetting the formation constraint is the second. If you have three defenders starting, a defender who does not play can only be replaced by a bench defender — so a bench defender ranked behind two midfielders, or one who did not play himself, leaves that slot empty. Re-check the order whenever you start a thin defence.
Treating the bench as dead weight is the third. A substitute who never plays is no cover at all, and with a Bench Boost in each half of the season, a bench of non-starters costs you twice.