http://www.sport-english.com/en/news/barca/fc-barcelona-players-release-fee-clauses-and-contract-lengths-6148412
Marc-André Ter Stegen: Contract until 2022 / 180 million euro release fee clause
Gerard Piqué: 2019 / 200 million
Ivan Rakitic: 2021 / 125 million
Sergio Busquets: 2021(+2 opcionales) / 200 million
Denis Suárez: 2020 (+1 opcional) / 50 million
Arda Turan: 2020 / 125 million
Andrés Iniesta 2018 / 200 million
Luis Suárez 2021/200 million
Leo Messi 2021/300 million
Neymar 2021 / 222* (rises to 250 million from 2018/19)
Rafinha Alcántara 2020 / 75 million
Jasper Cillessen 2021 / 60 million
Javier Mascherano 2019 / 100 million
Paco Alcácer 2021 / 100 million
Jordi Alba 2020 /150 million
Lucas Digne 2021 / 60 million
Sergi Roberto 2019 / 40 million
André Gomes 2021 / 100 million
Aleix Vidal 2020 / 60 million
Samuel Umtiti 2021 / 60 million
Mathieu 2018 (+1 opcional) / 40 million
Gerad Deulofeu 2019 / 35 million
Thomas Vermaelen 2019 / 80 million