As pe Notifictaion No.30/2012
1) If registered body corporate (here pvt co) receives works contract service from Individual, HUF, firm (whether registered or not) AOP then body corporate has liable to pay service tax on such works contract services. Here 50% of the service tax liable to pay by registered body corporate and remaining 50% of service tax liable to pay by Individual, HUF, firm (wheter registered or not) or AOP.
If pvt co, availed works contract service from another registered body corporate (pvt or public co), then entire (100%) service tax on such works contract shall be payable by service provider ie another registered body corporate.+
2) If service provider is service reciever is who is liable to pay
Company to Individual, HUF or AOP 100% of ST liable to pay by service
provider (ie Company)
Individual, HUF or AOP to Company 50% of ST liable to pay by service
provider and remaining 50% of ST
by service reciever
Company to Company 100% of ST by service provider
Individual, HUF or AOP to Individual, HUF or AOP 100% of ST by service provider
3) It is immaterial to service receiver (ie Body corporate)whether he has to claiming exemption limit of Rs.10 lakh for small service provider under notification No.33/2012. Even thought service receiver (ie body corporate) has claimed exemption under notifcation No.33/2012, service receiver liable to pay service tax on such works contract service received.
I assumed that job work charges including material portion and come under the purview of works contract definition.
If job work only relating to labour charges, then service provider liable to pay 25% of ST and service receiver (reg body corporate) liable to pay remaining 75% of ST