According to Wiki (sorry ;) ):-
Real Madrid[edit]
Following intense transfer speculation, coupled with his contract with Manchester City due to expire in June 2019, Brahim joined
Real Madrid on 6 January, for a transfer fee of £15.5 million (€17 million).
[13] His contract, which runs until 2025, also includes potential add-ons, which could see the value of the transfer to rise to £22 million (€24 million).
[14] The transfer also includes clauses which stipulates a 15 per cent sell-on fee to be received by City, which would rise to 40 per cent should Brahim depart Madrid and transfer to "
another Manchester club".
[15]