Sir,
Situation: -I
If the process undertaken by the job worker, namely company X amounts to manufacture under Section 2 (f) of Central Excise Act, 1944, then X has to pay duty on the product manufactured by him. The duty amount paid by X can be taken as credit by Y company and an utilize the same for payment of duty on the final product manufactured by Y. If Y company avails Notification No. 214/86-CE dated 25.3.1986, then Y company can take the credit of duty paid on the raw materials which is transfered to the job worker for further processing and Y company can get back the processed raw material without payment of duty from X. For this purpose Y company has to follw the procedure mandated by Notification No. 214/86.
Situation: -II
If the process undertaken by X company as job worker does not amount to manufacture, then X company has to pay service tax on the gross value charged by X company. This service tax paid by X company can be availed as input service credit by Y company.
However, as per Sl. No. 30 (c) of Notification No. 25/2012-ST dated 20.6.2012 (with effect from 1.7.2012) as amended "carrying out an intermediate production process as job work (by X company) in relation to any goods excluding alcoholic liquors for human consumption, on which appropriate duty is payable by the principal manufacturer (Y company).