You pay GST dozens of times a month without necessarily noticing — on your coffee, your Uber, your phone bill. Here's what it actually is, how it's calculated, and what changed with GST 2.0.
What Is GST?
GST stands for Goods and Services Tax — an indirect tax levied on the supply of goods and services in India. When it was introduced, it replaced a stack of older indirect taxes (VAT, Service Tax, Central Excise, and others) that used to apply separately at different stages, with different rates, in different states. In one line: GST is the tax paid on the supply of goods and services, collected by the seller and passed on to the government.
A Simple Example
Say a shop sells a product for ₹10,000 and the GST rate on it is 18%. The taxable value is ₹10,000, GST at 18% works out to ₹1,800, so the total amount payable is ₹11,800. The customer pays ₹11,800 — ₹10,000 for the product plus ₹1,800 in GST — and the seller collects that GST and remits it to the government.
Where it gets slightly more layered is how that ₹1,800 gets split, and that depends entirely on whether the buyer and seller are in the same state or different states.
| Supply Type | Taxable Value | Tax Split | Total GST |
|---|---|---|---|
| Intra-State (within the same state) | ₹10,000 | CGST ₹900 + SGST ₹900 | ₹1,800 |
| Inter-State (across states) | ₹10,000 | IGST ₹1,800 | ₹1,800 |
Within a state, GST splits evenly between the Centre (CGST) and the state government (SGST/UTGST). Across state lines, it's collected as a single Integrated GST (IGST), which is later apportioned between the Centre and the destination state. Either way, the customer pays the same total — only the internal bookkeeping between governments differs.
One thing worth remembering: the actual rate isn't a flat number across all products. It depends on how that specific product or service is classified — its HSN code for goods, or SAC code for services — so always check the applicable rate rather than assuming.
Where You're Already Paying GST
GST shows up far more often in daily life than most people realise. Shopping, restaurant bills, mobile and electronics purchases, laptops, hotel stays, cab and transport services, professional services, medicines and books (for the taxable categories), and event tickets can all carry GST depending on classification and applicable exemptions. On the business side, it applies to sales and purchases, tax invoices, manufacturing, trading, and service businesses — which is why accounting and ERP software, e-invoicing, and GST return filing have all become standard parts of running a compliant business, not optional add-ons.
When Does GST Actually Apply?
GST applies whenever there's a taxable supply of goods or services. The typical flow looks like this: a purchase is made, goods or services are supplied, a GST invoice is raised, GST is collected from the buyer, and it's eventually reported and paid to the government through periodic return filing.
For registered businesses, there's an important mechanism sitting inside this flow: Input Tax Credit (ITC). If a business pays GST on its own purchases (inputs), it can generally claim credit for that tax and set it off against the GST it collects on its own sales — so GST is ultimately meant to tax the value added at each stage, not the same value repeatedly. Getting ITC eligibility and documentation right is one of the more common areas where businesses run into disputes, so it's worth treating carefully rather than as an afterthought.
What Changed With GST 2.0
The 56th GST Council meeting brought in what's being called GST 2.0 — a simplified two-rate structure of 5% and 18%, with a special 40% rate reserved for specified luxury and sin goods. Alongside the rate simplification, the update included exemptions on health and life insurance supplies, easier and more risk-based refund processing for eligible zero-rated supplies, simplified registration for small and low-risk businesses, and streamlined e-invoicing and compliance rules.
A more recent, narrower update took effect from 1 February 2026: certain e-invoice validations tied to RSP-based (retail sale price) tax calculation were relaxed under Notification No. 20/2025-CT. It's a good example of why compliance isn't a "set once" exercise — rate structures are one layer, but the underlying validation and filing rules keep getting refined, and businesses need to track both.
A quick note on staying current: GST rates and rules change through Council meetings and notifications fairly regularly. The safest habit for any business is to check the applicable HSN/SAC rate and the latest notifications on the official GST Portal before finalising invoices, rather than relying on a rate you remember from a previous quarter.
Two Terms Worth Knowing: AR and AP
In everyday accounting language tied to GST, you'll often see AR (Accounts Receivable) — money a customer owes you — and AP (Accounts Payable) — money you owe a supplier. These aren't GST-specific terms, but they matter here because GST liability and Input Tax Credit both flow through exactly these relationships: what you owe your suppliers determines your input credit, and what your customers owe you includes the GST you're collecting on their behalf.
The One-Line Summary
GST is an indirect tax on the supply of goods and services — CGST plus SGST/UTGST within a state, IGST across states, with Input Tax Credit reducing what a business ultimately pays.
Understanding these basics is what makes everything downstream — return filing, ITC claims, refund processing, audit thresholds — actually make sense, rather than feeling like a set of arbitrary rules. Whether you're a first-time business owner or just curious why your restaurant bill has three tax lines on it, that's the whole system in a nutshell.
This is a general educational overview of GST as applicable in India, current as of early 2026. Rates, exemptions, and procedural rules are subject to change through GST Council notifications — always verify the latest applicable rate and rule on the GST Portal or with a qualified tax professional before filing.