This is a list of Spanish football transfers for the summer sale prior to the 2020–21 season of La Liga.
Due to the COVID-19 pandemic and its effects on sports leagues worldwide, FIFA announced that the summer transfer window opening date will remain the same under certain conditions regarding original squad involvement.
[1] On 8 June 2020, the RFEF and La Liga agreed to start the window on 4 August and end on 5 October due to the 2019–20 La Liga season concluding on 19 July after hiatus.
New signings that were originally included in rosters for the post-hiatus 2019–20 UEFA Champions league and Europa League knockout phases went on to play the competition with their former club by contract, they were ready for use at their new club once the tournaments concluded.
Clubs below La Liga level can also sign players on loan at any time.