One of the salient features of service tax levy is that it is payable only when the payment for the service rendered has been received by the service provider. Mere raising of a bill for the provision of service, does not result in any obligation to pay service tax. Receipt of payment against such bill is a condition whereafter only service tax is to be paid.
However, the Finance Act, 2005 has introduced a major amendment whereby service tax becomes payable when payment is received in respect of services rendered or to be rendered or being rendered. The amendment by Finance Act, 2005 makes a sea-change in the position that was prevailing prior to the amendment. Therefore, where a service provider receives any payment whether in full or in part, whether as advance or otherwise towards the service rendered or to be rendered or being rendered, on such payments so received, the service tax liability is to be discharged