Corriere dello Sport says while the transfer is unlikely to be rubberstamped until tomorrow, everything is now settled.
Barca have used the €1m Inter offered to release Vidal from his contract as a contribution to the golden handshake he had been seeking.
The Chile veteran will sign a two-year deal with Inter, which will also carry a 12 month option.
This season he will earn around €5m, with the second year being raised to €7m. With bonuses, it will mean Vidal will be paid the same terms by Inter as he enjoyed with Barca.
Vidal passed his medical with Inter this morning and there is hope he will sign his contract in the coming hours.