Notes
- Dorostol Silistra (Silistra) participates in the group during the previous season thanks to an announced merger with Svetkavitsa 2020 (Poroyno) and under the name Dorostol-Svetkavitsa, under which name it is also referred by ZS na BFS - Varna. Such a merger however is never legally carried out. During this season the club continues participatio in the group under its own name.
- With the start of this season Dunav (Ruse) is renamed to Dunav ot Ruse (Ruse) as a result of the club's activities being reorganized under a new legal entity that was created on 14 September 2020, with the old legal entity seizing operations.
- Volov (Shumen) plays its home games at the "Panayot Volov" st. in Shumen.
- Dorostol Silistra (Silistra) plays its home games at the "Louis Eyer" st. in Silistra.
- Dunav ot Ruse (Ruse) plays its home games at the "Dunav" st. in Ruse (rounds 1-13) and at the Gradski stadion in Ruse (rounds 14-26).
- Lokomotiv (Ruse) plays its home games at the "Lokomotiv" st. in Ruse.
- Ludogorets 1945 III (Razgrad) plays its home games at the "Gnezdo na orli" complex in Razgrad.
- Riltsi (kv.Riltsi, Dobrich) plays its home games at the "Druzhba" st. - artificial field in Dobrich.
- Svetkavitsa Targovishte (Targovishte) plays its home games at the "Dimitar Burkov" st. in Targovishte.
- Spartak 1918 II (Varna) plays its home games at the "Spartak" st. in Varna.
- On 23 March 2022 the Executive committee of the BFU suspends the membership of Lokomotiv (Ruse) as a club in the union due to administrative irregularities. As a result all its teams participating in competitions, organized by the BFU, are removed from the respective groups. Their results still count and their opponents until the end of the season are awarded 3:0 wins. On 7 April 2022 the Executive committee of the BFU allows the youth teams of the clubs that have their membership thus suspended to continue participation in their respective competitions.
Notes
- On 2 August 2021 Parva atomna (Kozloduy), 14th last season; withdraws. On the same day it's replaced in the group by Juventus (Malchika), 1st in A OG Pleven last season, which takes over its schedule.
- Botev II (Vratsa) plays its home games at the "Hristo Botev" st. in Vratsa.
- Etar VT II (Veliko Tarnovo) plays its home games at the "Trifon Ivanov" field in Veliko Tarnovo.
- Spartak (Pleven) plays its home games at the "Pleven" st. in Pleven.
- On 7 September 2021 Bdin 1923 (Vidin) is deducted 3 points for a no-show without an excusable reason for its round 5 match against Peshtera (Galata).
- On 25 March 2022 Peshtera (Galata) is removed from the group by the Sports-technical commission of ZS na BFS - Veliko Tarnovo after it withdraws the day before that. Its results still count and its opponents until the end of the season are awarded 3:0 wins.
Notes
- With the start of the season the renaming of Bansko (Bansko) to Bansko team comes into force, as a result of a new legal entity being founded on 15 June 2020.
- Balkan 1929 (Botevgrad) plays its home games at the "Hristo Botev" st. in Botevgrad.
- Kyustendil (Kyustendil) plays its home games at the "Osogovo" st. in Kyustendil.
- OFK Kostinbrod 2012 (Kostinbrod) plays its home games at the "Georgi Benkovski" st. in kv.Maslovo, Kostinbrod.
- Pirin II (Blagoevgrad) plays its home games in Rila.
- Septemvri II (Sofia) plays its home games in German.
Notes
- On 25 June 2021 Izvor (Gorski izvor), 10th last season; changes identity after it is renamed and moves home city as Sayana (Haskovo).
- Beroe II (Stara Zagora) plays its home games at the "Lokomotiv" st. in Stara Zagora.
- Dimitrovgrad 1947 (Dimitrovgrad) plays its home games at the "Minyor" st. in Dimitrovgrad.
- Lokomotiv 1926 II (Plovdiv) plays its home games in Orizari.
- Sayana (Haskovo) plays its home games at the "Haskovo" st. in Haskovo.
- Chernomorets 1919 (Burgas) plays its home games at the "Chernomorets" st. in Burgas.
- On 23 March 2022 the Executive committee of the BFU suspends the membership of FK Yambol 1915 (Yambol) as a club in the union due to administrative irregularities. As a result all its teams participating in competitions, organized by the BFU, are removed from the respective groups. Their results still count and their opponents until the end of the season are awarded 3:0 wins. On 7 April 2022 the Executive committee of the BFU allows the youth teams of the clubs that have their membership thus suspended to continue participation in their respective competitions.