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Issues: (i) Whether GST was payable on services completed in 2015, though post-facto approval and billing occurred after 1 July 2017; (ii) Whether interest was payable on the withheld contractual amount and, if so, at what rate.
Issue (i): Whether GST was payable on services completed in 2015, though post-facto approval and billing occurred after 1 July 2017.
Analysis: Deployment of technical personnel for repair and maintenance constituted a supply of services. Under the time-of-supply framework in Sections 13(1) and 13(2), read with the transitional protection in Section 142(11)(b) of the West Bengal Goods and Services Tax Act, 2017, taxability depended on when the service was actually supplied. The service had been fully rendered before the GST appointed day. The post-facto approval and subsequent raising of bills did not alter the date of supply. The applicable Government memorandum likewise treated services supplied before 1 July 2017, where invoiced later, as falling under the erstwhile Service Tax regime.
Conclusion: GST was not payable on the completed service; any applicable tax was governed by the pre-GST Service Tax regime. This issue was decided in favour of the assessee.
Issue (ii): Whether interest was payable on the withheld contractual amount and, if so, at what rate.
Analysis: Although there was no restraint against payment in the pending civil suit, the existence of the taxability dispute meant that the delay could not be wholly attributed to the respondents. The claimed commercial rate of 12% was therefore not warranted, while interest at the prevailing banking rate was appropriate.
Conclusion: Interest was payable at 8% per annum from the date of submission of the bills until actual payment. This issue was partly decided in favour of the assessee.
Final Conclusion: Services actually supplied and completed before commencement of GST remain governed by the pre-GST tax regime notwithstanding later approval or invoicing, and the unpaid amount attracts interest at the banking rate.
Ratio Decidendi: For transitional tax purposes, liability is determined by the actual date of supply of services; subsequent approval or invoicing cannot subject a completed pre-GST service to GST.
Pre-GST completed services remain outside GST despite later billing, while withheld contractual payments attract banking-rate interest.
Services fully supplied before GST commenced remain subject to the pre-GST service-tax regime, even where approval and invoicing occur after commencement. Under the time-of-supply and transitional framework, subsequent administrative approval or billing does not change the completed service's supply date or impose GST. Where contractual payment was withheld amid a genuine taxability dispute, delay was not wholly attributable to the payers; commercial interest was inappropriate, but interest at 8% per annum from bill submission until payment applied.
Transitional taxability of pre-GST services Transitional taxability of pre-GST services - Point of taxation for services - GST liability on manpower services completed before the commencement of the GST regime, where post-facto approval and billing occurred thereafter - HELD THAT: - Section 142(11)(b) of the GST Act specifically provides that notwithstanding the provisions of Section 13, no tax shall be payable under the GST Act to the extent tax was leviable on the services under Chapter V of the Finance Act, 1994. This position is further fortified by Notification No. 5050-F(Y) dated 16th August, 2017 issued by the Audit Branch, Finance Department, Government of West Bengal, wherein it was specifically clarified, in respect of services supplied before 1st July, 2017, that where the invoice/bill was raised on or after 1st July, 2017 after expiry of thirty days from the date of supply of the service, Service Tax would be applicable and not CGST/WBGST. The service was rendered and completed before the appointed day. Post-facto approval of work already performed and subsequent submission of bills could not alter the date of supply or bring the completed service within the GST regime. Under the transitional provision and the State clarification, taxability, if any, remained governed by the erstwhile Service Tax regime and not by the WBGST Act. [Paras 17, 18] The withholding of payment for non-compliance with GST formalities was unsustainable; payment was directed after deduction of pre-GST tax, if applicable and otherwise payable. Interest on delayed payment - Rate of interest on the unpaid amount for completed manpower services - HELD THAT: - Though no interim restraint operated against payment, a genuine dispute regarding taxability existed and a civil suit was pending. The delay could not be wholly attributed to the respondents; hence, interest at the prevailing banking rate was considered appropriate. [Paras 19] Interest was awarded at 8% per annum from submission of the bills until actual payment. Final Conclusion: The writ petition was disposed of with a direction to release the amount due, subject to deduction of tax, if any, under the pre-GST regime, together with interest at 8% per annum.