See main article: 2020–21 Billie Jean King Cup Europe/Africa Zone. The play-offs of the 2020–21 Billie Jean King Cup Europe/Africa Zone Group I were the final stages of the Group I zonal competition involving teams from the Europe/Africa. Using the positions determined in their pools, the thirteen teams faced off to determine their placing in the 2020 Billie Jean King Cup Europe/Africa Zone Group I. The top four teams advanced to the 2020 Billie Jean King Cup play-offs, while the bottom two teams were relegated to Europe/Africa Zone Group II for 2022.
| Placing | Pool A (Tallinn) | Pool B (Tallinn) | Pool A (Esch-sur-Alzette) | Pool B (Esch-sur-Alzette) |
|---|---|---|---|---|
| 1 | ||||
| 2 | ||||
| 3 | colspan=2 | |||
| 4 | ||||
The first-placed and second-placed teams of each pool played against one another in a head-to-head round. The winners of each round advanced to the 2020 Billie Jean King Cup play-offs.
The last-placed teams of each pool played against one another in a head-to-head round. The losers of each tie were relegated to Europe/Africa Zone Group II in 2022.
| Placing | Teams | ||||
| Promoted/First | |||||
| Fifth | |||||
| Ninth | |||||
| Tenth | |||||
| Twelfth/Relegated | |||||