2020–21 Serie B

The 2020–21 Serie B (known as the Serie BKT for sponsorship reasons) was the 89th season of the Serie B since its establishment in 1929. It started on 25 September 2020 and ended on 10 May 2021.

On 5 November 2020, Serie B announced it would use VAR from the second half of the season. However, it was used only on promotion play-off matches. DAZN broadcast all matches live domestically, with MyCujoo further distributing games in 15 countries.

Changes
The following teams have changed division since the 2019–20 season:

To Serie B
Relegated from Serie A
 * Lecce
 * Brescia
 * SPAL

Promoted from Serie C
 * Monza (Group A)
 * Vicenza (Group B)
 * Reggina (Group C)
 * Reggiana (Play-off winners)

From Serie B
Promoted to Serie A
 * Benevento
 * Crotone
 * Spezia

Relegated to Serie C
 * Perugia
 * Trapani
 * Juve Stabia
 * Livorno

Positions by round
The table lists the positions of teams after each week of matches. In order to preserve chronological evolvements, any postponed matches are not included to the round at which they were originally scheduled, but added to the full round they were played immediately afterwards.

Promotion play-offs
Rules:  
 * Preliminary round: the higher-placed team plays at home. If teams are tied after regular time, extra-time is played. If scores are still level, the higher-placed team advances;
 * Semi-finals: the higher-placed team plays at home for second leg. If teams are tied on aggregate, the higher-placed team advances;
 * Final: the higher-placed team plays at home for second leg. If teams are tied on aggregate, the higher-placed team is promoted to Serie A, unless the teams finished tied on points after regular season, in which case winner is decided by extra-time and a penalty shootout if necessary.

Relegation play-out
The relegation play-out was not played because the 16th-placed team Ascoli finished more than 4 points ahead of 17th-placed team Cosenza, then they were relegated directly to Serie C. Cosenza was later readmitted to replace the excluded Chievo.

Top goalscorers
1 Player scored 1 goal in the play-offs.
 * Note

Hat-tricks
4 Player scored four goals ; (H) – Home (A) – Away
 * Note

Clean sheets
1 Player kept 1 clean sheet in the play-offs. 2 Player kept 2 clean sheets in the play-offs.
 * Note