A common misconception is that alcohol and petrol are kept outside GST for the same reason, but their exclusion rests on fundamentally different legal foundations. Alcohol for human consumption is constitutionally excluded from GST itself, as the Constitution defines GST to apply to all goods except such alcohol. Consequently, bringing liquor under GST would require a constitutional amendment, a complex process needing broad political consensus, and until then it remains a State revenue source taxed through excise and VAT (with industrial alcohol already under GST). Petroleum products—petrol, diesel, crude oil, natural gas, and aviation turbine fuel—stand on a different footing. They are not constitutionally excluded; instead, the GST law provides that GST will apply to them from a date to be notified. This means no constitutional amendment is needed—only a GST Council recommendation and notification. The distinction matters because petrol can legally be brought under GST at any time, while liquor cannot without rewriting the Constitution, despite both currently being taxed under the legacy regime.
Let’s break it down.
Alcohol for human consumption is constitutionally excluded from GST.
The Constitution itself defines GST as a tax on all goods other than alcohol for human consumption. In simple terms, GST was never meant to apply to liquor unless the Constitution is changed.
That means if alcohol is ever to be brought under GST, Parliament would first have to amend the Constitution which is a long, complex process requiring wide political consensus. Until then, alcohol remains a pure State revenue source, taxed through State excise and VAT.
A small but important clarification here: industrial alcohol is already under GST. The constitutional exclusion applies only to alcohol meant for human consumption.
Petroleum products, on the other hand, are in a very different category.
Petrol, diesel, crude oil, natural gas and aviation turbine fuel are not constitutionally excluded from GST. They are only temporarily kept out
The GST law itself says that GST on these products will apply from a date to be notified. In other words, the law is already in place, the switch is just turned off for now.
To bring petrol or diesel under GST, no constitutional amendment is required. The GST Council only needs to recommend it, and the government can notify a date. That’s it.
At present, these products continue under central excise and State VAT, largely because they are major revenue sources for both Centre and States.
Why does this distinction matter?
Because if the government decides tomorrow to bring petrol under GST, it legally can.
But if it wants to bring liquor under GST, it cannot do so without rewriting the Constitution itself.
So, while alcohol and petrol may look similar from a tax collection standpoint today, their legal DNA under GST is completely different.
Understanding this difference helps cut through a lot of noise in policy debates and media discussions around GST expansion.
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Thanks for explaining in simple language