Since the ceremony honouring the films of 2009, the Academy of Motion Picture Arts and Sciences has chosen its top prize through a system that many of its own members admit they cannot fully explain. Best Picture is not won by the film with the most votes. It is won by the film that survives an elimination count known as the preferential ballot, a form of instant-runoff voting that rewards broad approval over passionate minorities.
Why the Academy changed the count
In June 2009, Academy president Sid Ganis announced that the Best Picture field would double from five nominees to ten for the 82nd Academy Awards, a decision widely read as a response to the previous year’s omission of The Dark Knight and WALL-E. The bigger field created an arithmetic problem. Under a simple plurality vote, a film could in theory take the award with barely more than ten percent of first-place support. To guarantee a majority winner, the Academy revived preferential counting for the final Best Picture vote, a method it had used in the 1930s and last applied in 1945. Every other category is still decided by whichever nominee collects the most votes; Best Picture alone demands more than half.
How the ballots are counted
Voters rank the nominees from first to last. PricewaterhouseCoopers, the accountancy firm that has tallied Academy ballots since 1934, sorts the ballots into piles according to each voter’s first choice. If one film holds more than fifty percent of the piles, it wins outright, although with ten nominees that almost never happens on the first pass. Instead, the film with the fewest first-place votes is eliminated, and each of its ballots moves to the pile of the highest-ranked film still in contention. The process repeats, round after round, until one title crosses the fifty percent line.
The practical effect is that second and third choices decide the Oscar. A film that appears near the top of almost every ballot can overtake a rival that has more first-place votes but also more detractors. Campaign strategists learned the lesson quickly: it is no longer enough to be loved by a faction, a contender must avoid being resented by everyone else.
What the system has produced
The first test came in March 2010, when The Hurt Locker, one of the lowest-grossing winners in the category’s history, beat Avatar, then the highest-grossing film ever released. Since then the ballot has been credited with a run of consensus champions. Spotlight won in 2016 while taking only one other award that night. Green Book in 2019 and CODA in 2022 both prevailed over rivals with far larger nomination hauls; CODA arrived with just three nominations in total, the fewest for any winner in almost ninety years. Divisive films with devoted admirers and equally committed sceptics tend to stall in the later rounds, however loud their support sounds during the season.
The rules have shifted at the edges. From 2011 the Academy used a sliding field of five to ten nominees, and from the 94th Academy Awards, covering the films of 2021, the lineup was fixed at exactly ten.
Reading the race from outside
The preferential ballot complicates prediction. Box office, critical scores and even nomination counts can mislead, because the winner is ultimately the film that the fewest voters object to. The most reliable precursor remains the Producers Guild of America award, which uses the same preferential count across a similarly sized voting body and has matched the eventual Best Picture winner in most years since 2009. Awards pundits, and the entertainment betting markets that price the Oscars every January, have learned to ask a different question: not which film is loved most intensely, but which one sits second or third on the greatest number of ballots.
That is the quiet legacy of the 2009 reform. The Academy did not simply widen its shortlist; it redefined what winning means. Best Picture now goes to the broadest coalition in the room, and every serious campaign in Hollywood is built around that single mathematical fact.