This is a list of Spanish football transfers for the summer sale prior to the 2021–22 season of La Liga.
The summer transfer window will begin on 1 July 2021, although a few transfers were announced prior to that date, the transferred players will not officially become part of their new club until the window's opening.
Players without a club can join one at any time, either during or in between transfer windows.
Clubs below La Liga level can also sign players on loan at any time.
If needed, clubs can sign a goalkeeper on an emergency loan, if all others are unavailable.