Of the final 3, the finalist with the most votes to win is declared the winner. Current format In 2020, Seven Network revamped the format of the series to resemble the format of the American & Canadian editions - with housemates deciding both Nominations and Evictions among themselves. The new format added emphasis to the competitive aspect of surviving the eviction process. As such, the housemates will now be allowed to strategise, politic and collude about the nominations and evictions. However, there will still be key differences compared to the American/Canadian format, most prominently with the Australian public still deciding the eventual winner - rather than being decided by a "Jury" of evicted housemates (as is the case on the American and Canadian show). Nominations: At the start of each round, the housemates compete in a "Nomination Challenge". The winner of the competition has immunity from the next eviction and the power over the nominations. Immediately after the challenge, the winning housemate will be called to the Diary Room by Big Brother to name their nominees, and provide full reasons for their nominations. The number of nominees is determined by how far into the overall game housemates are, as the game starts with three nominees and reduces to two nominees towards the end of the game. Eviction: On eviction night, all housemates must vote to evict one of the nominees, with the exception of the nominating housemate (who will only cast a tie-breaker vote, if required), nor do the nominated housemates vote when there are only two nominees (on account of their votes cancelling the other's out). The eviction vote is by secret ballot, with housemates casting their votes orally in the Diary Room to Big Brother, and must provide a reason for their vote. The nominee with the most votes is evicted from the house. Finale: The final three housemates will face Australia's vote to determine the winner. This vote is conducted on a dedicated website, with voters voting for a winner and the finalist with the most votes wins. Prize money The winner of Big Brother Australia receives a cash prize for being the last remaining housemate. In Big Brother 1 - Big Brother 3, Big Brother 8 - Big Brother 10 & Big Brother 13, the prize was guaranteed A$250,000. Some seasons only mentioned the grand prize part-way through the series. Big Brother 11 & Big Brother