Q.What do you understand by G.S.T? How good is the system of G.S.T as compared to the old tax system? State its categories.

GST (Goods and Services Tax) is a comprehensive, multi-stage, destination-based indirect tax levied on every value addition in the supply chain of goods and services. It replaced a fragmented structure of multiple central and state levies (excise duty, service tax, VAT, entry tax, octroi, etc.) with a unified tax regime implemented from July 1, 2017.

Compared to the old system, GST eliminates the cascading effect of taxes (tax-on-tax) by allowing seamless input tax credit across the entire supply chain. It has simplified compliance by subsuming around 17 central and state taxes into one framework, reduced the overall tax burden on goods and services, and created a common national market by removing inter-state barriers. The system is more transparent, technology-driven (GSTN portal), and reduces tax evasion through better tracking.

GST operates in four categories:

Understanding GST

The Goods and Services Tax is a comprehensive indirect tax levied on the supply of goods and services at each stage of the value chain. The defining feature is that it is a destination-based tax: revenue accrues to the state where the final consumer resides, not where production occurs. This marks a fundamental shift from the origin-based taxes India had for decades.

At its core, GST is a value-added tax. A manufacturer who buys raw materials pays GST on that purchase (input tax) and collects GST when selling the finished product (output tax). The manufacturer remits only the difference—tax on the value added at that stage. The next buyer in the chain gets credit for the tax already paid, and so on, until the final consumer bears the full tax burden. This input tax credit mechanism is what prevents the old problem of cascading: tax levied on a base that already includes tax.

Before GST, India's indirect tax structure was fragmented. The Centre levied excise duty (on manufacturing), service tax, and customs duty. States imposed VAT (on sale of goods), entry tax, luxury tax, entertainment tax, and a host of smaller levies. Crucially, service tax and VAT did not talk to each other—if you bought a service as an input, you could not set off that tax against the VAT you collected on goods sold. This created a "tax on tax" effect, inflating costs and distorting prices. Interstate sales attracted Central Sales Tax, which was not creditable, further gumming up supply chains.

GST vs. the Old Tax System

The comparison hinges on three dimensions: efficiency, compliance, and federalism.

Efficiency gains are substantial. By allowing seamless credit across goods and services, GST removes the artificial incentive to vertically integrate just to avoid tax leakage. A firm can now outsource logistics or IT services and claim credit for the GST paid, whereas earlier the service tax paid was a dead cost if the firm was in the VAT net. The elimination of CST means businesses no longer need to set up depots in every state to avoid the 2% inter-state levy; a single warehouse serving multiple states becomes viable. This has genuinely lowered logistics costs and improved supply-chain design.

The tax base has widened. Services that were outside the service tax net (many were exempt or not defined as taxable services) now fall under GST. The threshold for registration is uniform, pulling more small traders into the formal economy. Exports are zero-rated with full input credit refunds, making Indian goods more competitive abroad—a clear improvement over the old system where refunds were slow and incomplete.

Compliance is a mixed story. On paper, GST is simpler: one tax, one return system (GSTN), and electronic matching of invoices to verify credits. In practice, the initial years saw frequent changes in return formats, rate revisions, and portal glitches. Still, the direction is right. The old regime required a business to file separate returns for excise, service tax, and state VAT—often with different definitions of taxable value and different procedural rules. GST consolidates this, though the learning curve was steep.

Federalism was the trickiest design challenge. States feared losing fiscal autonomy—VAT was their largest own-tax source. The solution was a dual GST: the Centre and states levy tax concurrently on the same base, each getting a share. For intra-state supplies, both Central GST (CGST) and State GST (SGST) apply. For inter-state supplies, Integrated GST (IGST) applies, collected by the Centre and then apportioned. This preserved the states' taxing power in form, though rate-setting is now done by the GST Council (a constitutional body with Centre and state representatives), not unilaterally by states. The compensation cess, promised for five years (later extended), cushioned states against revenue shortfalls during the transition.

Compared to the old system, GST is undeniably superior in economic logic. It treats the country as a single market, reduces cascading, and aligns with global best practice. The trade-off is that it required states to cede rate autonomy and accept a cooperative federal model, which has its own frictions (witness the debates over rate rationalization and compensation).

Categories of GST

GST operates through four statutory categories, each a separate law but with identical provisions:

| Category | Levied by | Applies to | Revenue accrues to | …