Big Brother (Finnish TV series) season 12

The twelfth season of Big Brother Suomi premiered on 6 September 2020 and was aired on Nelonen. This season was longer than the eleventh season and ran for 12 weeks.

Elina Kottonen returned to host the main show. The Daily Show was co-hosted by Kimmo Vehviläinen and Alma Hätönen.

Due to the COVID-19 pandemic, all of the official housemates must test negative for COVID-19 twice before entering the house. Housemates directly entered the house on their own without being introduced one by one at the studio during the live launch show. Each live show on Sunday featured a small live studio audience that is sitting loosely while wearing face masks.

The house this year is designed by Aalto University's space design students.

Effect by the evicted housemate
During this season, the evicted housemate still got the chance to influence the house.

House division
On launch night, it was revealed by the host that half of the housemates would not enter the Big Brother House, instead, they entered the BB Summer Cottage. The BB Summer Cottage is located in the task area on the roof of the Big Brother House. Both areas were merged since the end of the weekly task of Week 3.

Nominations table
The first housemate in each box was nominated for two points, and the second housemate was nominated for one point.