GST — Goods & Services Tax
A single nationwide indirect tax that replaced a tangle of separate central and state taxes with one unified system, launched in July 2017.
Explain it like I'm 10
Before July 2017, a truck carrying goods from Tamil Nadu to Punjab could get taxed multiple times at multiple state borders, on top of separate central taxes like excise duty — every state effectively ran its own toll booth on the same goods. GST swept all of that away and replaced it with one tax, one rate structure applied uniformly nationwide, collected once as goods and services move through the economy, with the revenue then split between the central and state governments. It turned India, for tax purposes, into a genuine single market for the first time.
The formula
GST charged on a sale = Value of good/service × Applicable GST rate FY24-25 (record year): Gross GST Collections = ₹22.08 lakh crore (+9.4% YoY) Average monthly mop-up = ₹1.84 lakh crore
Historical data
Collections have effectively doubled in five years — partly organic growth in formal-sector consumption, and partly better compliance as GST's own data trail (e-invoicing, e-way bills) made evasion harder.
GST 1.0 → GST 2.0, effective 22 September 2025
GST 2.0 collapsed India's original five-slab structure into a simpler three-effective-slab system, aiming to reduce classification disputes (endless litigation over whether a given snack counted as a "biscuit" or a "namkeen" at a different rate) and ease the burden on everyday goods.
| GST 1.0 | GST 2.0 (from 22 Sep 2025) | |
|---|---|---|
| Slab structure | 0% / 5% / 12% / 18% / 28% | 0% / 5% / 18% / 40% |
| Gold & diamonds | 3% / 0.25% | Unchanged — 3% / 0.25% |
| Effective date | 1 July 2017 | 22 September 2025 |
The 40% slab is a new top rate reserved for sin and luxury goods, replacing the old 28% top rate plus a separate compensation cess that had applied on top of it for select items — folding two layers of tax into one headline number.
Who calculates it
The GST Council — chaired by the Union Finance Minister with state finance ministers as members — sets rates and rules by consensus; the CBIC administers central GST, and state tax departments administer their state GST component.
Where this number can mislead you
- ⚠GST is an indirect tax and therefore regressive by nature — the rate a consumer pays is unrelated to their income, so it takes a proportionally bigger bite out of lower-income households.
- ⚠Frequent rate and slab changes (like the 2025 restructuring) mean month-on-month collection comparisons must account for the changed rate structure itself, not just changes in underlying economic activity.
- ⚠A rising collection figure can reflect better compliance and formalisation of previously informal transactions as much as genuine growth in the taxed economy — the two effects are difficult to fully separate from the headline number alone.
- ⚠GST collections are sensitive to consumption patterns and can be volatile around festival seasons or rate-change transition months, making single-month year-on-year comparisons an unreliable trend signal on their own.
Reality check
GST 2.0 took effect on 22 September 2025, replacing the original five-slab system with a simpler 0/5/18/40% structure, while gold and diamonds kept their special lower rates unchanged — and monthly collections in the reformed system's first weeks came in at ₹1.89 lakh crore for September 2025, up 9.1% year-on-year, suggesting the simplification hadn't dented collections even as rates fell on many everyday items.
Test yourself
What problem did GST primarily solve when it launched in July 2017?