Service tax invoice for ongoing events or workshop

You are asking in whose perspective, Accounting Standard, Service Tax or any other act.

Dear Ajit,

My querry is for Service Tax prespective only.

Then for the purpose of service tax, whenever any payment is released after the completion of an event as mentioned in the contract, service tax will be attracted. Also, as per the completion of an event as mentioned in a contract, the invoices are to be raised for the amount of job completed as per the contract agreed between both the parties.