Finance Ministers usually weave around their welfare spending proposals based on projections of direct and indirect tax collections in the fiscal.
The GST is also to subsume state VAT.
And typically the Centre would account for roughly half of the total nationwide GST revenues after excise, service tax and VAT are subsumed and weave around its budget.
But this year is peculiar, experts say. “No reliable projection of the GST revenue is available because the GST Council is yet to decide which product or service will be taxed at what rate. In absence of that one cannot have a reliable projection of GST revenue collection,” a tax expert said.
VAT data of states cannot be taken to calculate the total GST revenue because the rate of taxation for different products may change under GST and also that the data with states is not always very reliable, he said.
Until tax rates for different products and services are decided, one cannot arrive at a reliable revenue projection for 2017-18, another expert said.