Topic guide · 11 provisions

GST Basics

GST, explained from zero

Start here if GST is new to you.

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GST replaced a tangle of older taxes – VAT, service tax, excise and a dozen cesses – with a single tax on ‘supply’. That one word does most of the work: if you supply goods or services in the course of business, GST is in play. If you don’t, it isn’t.

The tax is collected in stages. Every business in a chain charges GST on what it sells, claims credit for the GST it paid on what it bought, and pays the government only the difference. That credit mechanism is what stops tax piling on tax – and it’s why so much of GST law is really about protecting the credit chain.

Three taxes share the same base. A sale inside one state attracts CGST (central) plus SGST (state), split roughly half and half. A sale across state lines attracts IGST instead, at the combined rate. Same total, different pockets.

How a GST transaction works, end to end 1 Supply happens goods or services, for business 2 Rate applies based on classification 3 Tax charged CGST+SGST, or IGST 4 Credit claimed buyer offsets what he paid
The whole system in four steps. Everything else in GST law is detail hanging off one of these.

Worked example

Following one shirt through the chain

Mill sells fabric to a tailor ₹1,000 + 5% GST = ₹1,050 Mill pays ₹50 to government
Tailor sells shirt to a shop ₹2,000 + 5% GST = ₹2,100 Tailor owes ₹100, claims ₹50 credit, pays ₹50
Shop sells shirt to you ₹3,000 + 5% GST = ₹3,150 Shop owes ₹150, claims ₹100 credit, pays ₹50

The government collected ₹150 in total – exactly 5% of the final ₹3,000 price. Nobody paid tax on tax. That is the entire design of GST in one line.

The mistakes that cost people money

Not theoretical risks — the ones we actually see land on clients’ desks.

Thinking GST only applies to sales. Free samples, stock moved between your own branches in different states, and goods taken for personal use can all be treated as supplies.

Assuming your accountant’s software knows the right rate. Classification is a legal question, and the business – not the software – carries the liability if it is wrong.

Ignoring the credit chain when choosing suppliers. An unregistered or non-filing supplier can quietly cost you the credit on every invoice they raise.

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GST Basics — the complete guide

7 pages covering all 11 provisions, with the plain-language explanation and practice notes for each. Print it, keep it, share it with your accountant.

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This hub reproduces the text of the GST Acts and Rules as published by the Central Board of Indirect Taxes and Customs, along with our own plain-language explanations. It is general information, not legal advice for your specific facts — and the law changes. Always check the position for your own case before acting, and talk to us if the amount at stake matters.

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