The La Liga giants tabled three bids for the Brazil intentional this summer but the Reds refused to sell.
Coutinho, 25, handed in a transfer request in hope of securing his dream move to Barca but a deal was not agreed.
And according to Spanish transfer outlet Don Balon, Barca will return for Coutinho in January.
They say the Spanish giants will offer £97m (€110m) for the playmaker, including add-ons.
Don Balon add that Barca talisman Lionel Messi has backed the move.
The Argentina international has demanded Barca strengthen in January and Coutinho is Messi’s chosen signing.
However, Don Balon say Coutinho may have a slight doubt about joining Barca.