Regarding tds on contractor

This is simple maths :)

1. ST on 125000 @ 14% = 17500
2. SBC on 125000 @ 0.5% = 625
3. Interest as applicable at rates specified from due date to date of payment. Since I don't have these dates, I can't calculate interest.

@ Poornima you have told earlier i have to make 50% payment of service tax???? and the date of payment is 15/03/2016

In case where Service and Material not shown Sepretly in bill then RCM will applicable or not

Sorry, I forgot that point. You need to pay half of what I have mentioned.