Which positions cause the most bench tax
Bench tax is the points you left on your bench. This page splits a whole season of it by lineup slot, to show which decisions cost the most.
The data is one real 12-team Sleeper league, half PPR, over the 14-week 2025 regular season: 168 lineups. It is the same league as our sample report. Teams are shown as Team 1 to Team 12; players and points are real. The lineup is QB, 2 RB, 2 WR, TE, 2 FLEX, K and DEF, which is close to Sleeper's default.
How we split it
Every week, each team's bench tax is broken into individual swaps: start this bench player instead of that starter. Each swap is legal, so the lineup would still be accepted by Sleeper, and the swaps add up exactly to the bench tax. (The start/sit mistakes guide counts how many there were and what they cost.) Here, each swap is filed under the slot where the wrong starter played. If your FLEX started a receiver who scored 3 while a running back scored 18 on your bench, that is 15 points of FLEX tax.
Over the season the league left 2424.4 points on benches.
| Slot | Slots | Wrong calls | Points lost | Share | Per slot per week |
|---|---|---|---|---|---|
| QB | 1 | 38 | 261.8 | 11% | 1.56 |
| RB | 2 | 54 | 413.4 | 17% | 1.23 |
| WR | 2 | 85 | 620.0 | 26% | 1.85 |
| TE | 1 | 34 | 209.5 | 9% | 1.25 |
| FLEX | 2 | 110 | 852.7 | 35% | 2.54 |
| K | 1 | 3 | 21.0 | 1% | 0.13 |
| DEF | 1 | 12 | 46.0 | 2% | 0.27 |
"Per slot per week" divides the points lost by the number of those slots in the lineup and by the number of lineups. It answers a fairer question than the raw total: if you had one slot of each kind, how much would each one cost you in an average week?
FLEX is where lineups go wrong
The two FLEX spots cost the league 852.7 points, 35% of all bench tax, from 110 wrong calls. Even per slot, FLEX tops the table at 2.54 points a week. That makes sense once you think about what a FLEX decision is. It is the last lineup call you make, choosing between your third running back, third receiver and backup tight end, the players you trust least. They are close in quality, they often share snaps with someone else, and the gap between "starts" and "sits" is a coin flip. Coin flips go wrong a lot.
FLEX is also where the choice is widest. A RB slot can only take a running back, but FLEX can take any of three positions, so there are more bench players who might have been the right start. More options means more ways to be wrong in hindsight.
Running backs and receivers
By the position of the player left on the bench, running backs account for 930.4 points (38%), receivers 806.5 (33%) and tight ends 358.7 (15%). Running backs top the list, which fits how the position works. A backup running back's week depends on whether the starter gets hurt or the game script turns into a blowout, and both are hard to see coming. When the backup gets the work, he can outscore a starter by twenty.
The player benched at the highest cost all season was D. Henry (RB): left out 7 times when he should have started, for 108.1 points in total. Players like this sit in an awkward spot on a roster. They are good enough to score, but not trusted enough to start every week, so the manager keeps guessing.
| Benched player | Pos | Times | Points lost |
|---|---|---|---|
| D. Henry | RB | 7 | 108.1 |
| R. Doubs | WR | 7 | 53.2 |
| M. Andrews | TE | 7 | 50.6 |
| C. Watson | WR | 4 | 46.0 |
| T. Etienne | RB | 4 | 45.6 |
| J. Williams | WR | 3 | 44.5 |
Quarterback and tight end
The quarterback slot cost 261.8 points (11%) from 38 wrong calls. One slot, but a meaningful share. Quarterback mistakes are rarer because most managers roster one clear starter, yet when they do happen, usually during bye weeks or when streaming against a good matchup, they cost 6.9 points on average. Tight end looks similar: one slot, few real choices most weeks, but a big gap when the backup has the touchdown game.
Kicker and defense barely matter here
Kicker (21.0 points) and defense (46.0 points) together are about 3% of all bench tax. That is not because kickers and defenses are predictable. It is because most managers carry only one of each, so there is no one on the bench to compare with. In this league only 7% of lineups had a second kicker on the roster and 20% had a second defense. With no alternative, the bench tax at that slot is zero by definition. If you stream defenses and carry two, this number can be higher in your league.
What it means for your lineup
- Spend your decision time on FLEX. That is where the points are, and it is the slot people often fill last and fastest.
- Know your backup running backs' situations. Injuries and game script drive the biggest RB bench weeks, and those can sometimes be read from the injury report.
- Do not sweat the kicker. The bench tax at K and DEF is tiny because there is usually no choice to make.
- All of this is hindsight. A FLEX call that went wrong was often a fair call. The pattern over a season is what is worth learning from.
Related reading: lineup efficiency and bench tax explains how the best lineup is solved, start/sit mistakes by the numbers counts every wrong call, and close games and lineup calls shows how many of them decided games. The sample report has every team's bench tax for the season.