Goods and Services Tax (GST)
Start with what you already know
Walk into any shop — a chemist, a mobile store, a restaurant — and look at your bill. At the bottom, you will see a line: GST @ 5% or GST @ 12% or GST @ 18%. That extra amount is not pocketed by the shopkeeper. It goes to the government. But why is there a separate tax called GST, and not just "sales tax" or "VAT" like before?
The answer lies in a simple problem: before GST, every state had its own tax system. A truck carrying goods from Maharashtra to Karnataka would be stopped at checkposts, pay entry tax, octroi, and state VAT — each time adding cost and delay. GST was designed to make India one unified market.
The precise meaning
Goods and Services Tax (GST) is a comprehensive, multi-stage, destination-based indirect tax levied on every value addition in the supply chain — from manufacture to final consumption.
Let me unpack each part of that definition.
Comprehensive — It replaced a dozen central and state taxes (excise duty, service tax, VAT, octroi, entry tax, luxury tax, etc.) with a single tax.
Multi-stage — A product passes through several stages: raw material → manufacturer → wholesaler → retailer → consumer. GST is collected at every stage where value is added.
Destination-based — The tax revenue goes to the state where the goods are consumed, not where they are produced. If a car is made in Gujarat but sold in Bihar, Bihar gets the GST.
Value addition — This is the key idea. A manufacturer buys steel for ₹100, pays 18% GST (₹18). He uses the steel to make a machine and sells it for ₹200. He collects 18% GST (₹36) from the buyer. But he does not pay ₹36 to the government — he pays only ₹18 (₹36 minus the ₹18 he already paid on steel). This is called Input Tax Credit (ITC).
Input Tax Credit is the heart of GST. It prevents "tax on tax" (cascading). Under the old system, a manufacturer paid tax on his inputs, then paid tax again on the full selling price — effectively taxing the tax. GST eliminates this.
How GST works: a simple chain
Imagine a wooden chair.
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Logger sells timber to a furniture maker for ₹1,000. GST @ 18% = ₹180. Logger deposits ₹180 with the government.
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Furniture maker uses the timber, adds value (labour, design), and sells the chair to a wholesaler for ₹2,000. GST on sale = ₹360. But he claims ITC of ₹180 (the tax he already paid on timber). He deposits only ₹180 (₹360 − ₹180).
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Wholesaler sells to a retailer for ₹3,000. GST = ₹540. ITC = ₹360. Deposits ₹180.
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Retailer sells to you, the consumer, for ₹4,000. GST = ₹720. ITC = ₹540. Deposits ₹180.
Total tax collected = ₹180 + ₹180 + ₹180 + ₹180 = ₹720 — exactly 18% of the final price ₹4,000.
Notice: the government collects the same total tax (₹720) whether it collects it in one lump from the retailer or in four small instalments from each stage. The difference is that everyone in the chain is incentivised to maintain proper invoices because they need ITC. This reduces tax evasion.
Why GST matters for the economy
Removed cascading — Earlier, a product bore "tax on tax". A study by the National Institute of Public Finance and Policy estimated that cascading added 25–30% to the final price of many goods. GST removed that.
Made India a common market — Before GST, a truck moving from Delhi to Chennai spent 60–70 hours at state borders in paperwork. After GST, interstate checkposts were dismantled. Logistics costs fell.
Increased tax base — Because every business wants ITC, they must file returns and show purchases from registered suppliers. This pulls informal businesses into the tax net.
Simplified compliance — Instead of filing separate returns for excise, service tax, and VAT, a business files one GST return.
The three-tier structure
GST in India is not a single rate. It has three components:
| Component | Levied by | Applies to |
|---|
| CGST (Central GST) | Central Government | Intra-state sales |
| SGST (State GST) | State Government | Intra-state sales |
| IGST (Integrated GST) | Central Government | Inter-state sales |
For a sale within the same state (say, a shop in Delhi selling to a customer in Delhi), the total GST is split equally: 9% CGST + 9% SGST = 18% total.
For a sale across states (Delhi to Mumbai), only IGST is charged (18%). The central government collects it and later transfers the state's share to Maharashtra (the destination state). …
