None if he plays next season we will have to cough up 30m it's we loaned him out this season in the hopes Bayern buy him
That is not true.
Barca have either 5m or 10m in appearance fees to pay if he stays.
It is 4.5m due for each of his 25 appearances and he has played 76 times but sure I read it is not just appearances but to count has to be a certain number of minutes and 9m been paid.
There is another 4.5 if Barca had won CL in 2019 and another 4.5m if Barca win it this year... which is not likely.
So around 20m of his 160m fee is outstanding. Of that 9m has been received from Bayern and Coutinho 'paid' around 10m himself when moved.
Looking at round 120m has been paid for him just now and his amortised cost is around 70m so that on the books is what needs to be covered to prevent a 'loss'.
I believe Barca initial plan was to try and sell him for 70-80m and put that down as around 40-50m loss on initial fee and then try to sign Neymar for 150-170m and claim got him back cheaper so balances out on that. Almost certain that is way it would be spun but the cova crisis has put end to that and difficult for either to move.
Newcastle may come in and pay a decent loan fee for him if takeover goes through would be my guess.