What Is GST? Simple Guide for Commerce Students

What is GST? GST, or Goods and Services Tax, is an indirect tax you pay when you buy goods or services in India. It replaced many older central and state taxes, and it's charged only on the value added at each stage.

You've already paid it, even if you never noticed. It's on your restaurant bill, your mobile recharge and the stationery you buy. Let's make it simple.

What is GST in simple words?

GST is a tax on consumption. The shop collects it from you and passes it to the government.

Quick answer: GST (Goods and Services Tax) is a single, destination-based indirect tax on the supply of goods and services in India. Each seller in the chain pays tax only on the value they add, and the final consumer bears the tax. The Centre and the states share it.

Two words in that answer matter:

• Indirect tax: you pay it through the price of what you buy, not by filing it yourself.
• Destination-based: the tax goes to the state where the goods or services are consumed, not where they're made.

What are the types of GST?

India follows a dual GST model. Both the Centre and the states charge tax. Which type applies depends on where the buyer and seller are.

Union territories without their own legislature have UTGST in place of SGST. Check the official GST portal for the exact rules.

Here's how to decide in a few seconds:

flowchart TD
A[Seller and buyer] --> B{Same state?}
B -->|Yes| C[CGST plus SGST]
B -->|No| D[IGST]

Example: A bookshop in Varanasi sells a book to a student in Lucknow. Both are in Uttar Pradesh, so CGST and SGST apply. If the same shop sells to a buyer in Delhi, IGST applies instead.

How does input tax credit work?

This is the clever part of GST, and it's a favourite exam topic. Input tax credit (ITC) lets a business subtract the tax it already paid on its purchases from the tax it collects on its sales.

Why does that matter? Without it, tax would pile on tax at every stage and prices would shoot up. ITC makes sure tax is charged only on the value added.

Let's use a small, made-up example. Assume a simple 18% rate:

1. A bookseller buys books worth ₹1,000. GST paid is ₹180.
2. She sells them for ₹1,500. GST collected is ₹270.
3. She pays the government only ₹270 minus ₹180, which is ₹90.

That ₹90 is the tax on her ₹500 of value added. Neat, right?

What are the current GST rates?

Rates are decided by the GST Council, which includes the Centre and the states. After the Council's September 2025 decisions, the old four-slab structure was simplified into two main rates, 5% and 18%. A special higher rate of 40% applies to a small list of items such as certain vehicles, aerated drinks and casino entry. These changes took effect on 22 September 2025.

Some items are still exempt or taxed at special rates. Rates can change again, so please check the official GST portal for the latest update before using any rate in your exam answer or your business.

Who needs to register under GST?

Registration depends mainly on turnover and the type of business. The limits differ for goods and services and for different states. They also get revised from time to time.

So don't memorise a number from a random website. Check the official GST portal for the current limits.

Some businesses must register whatever their turnover, for example many of those making inter-state supplies of goods. Again, verify the latest rules on the official site.

Why should commerce students learn GST?

GST touches almost every job in commerce. Accountants file returns. Tax executives handle reconciliation. Small business owners need it to price their products correctly.

It also carries solid marks in B.Com, CA, CMA and CS exams. And it's a skill employers ask for in accounting jobs.

A simple way to learn it:

• Start with the meaning and the types of GST.
• Practise place of supply with small examples.
• Solve ITC problems daily for a week.
• Revise the rate slabs only from official notifications.

Want to learn GST the easy way?

If numbers and sections feel heavy, you're not alone. Many students struggle until someone explains it with real examples.

At Satyam Institute of Commerce in Golghar, Varanasi, we teach commerce subjects step by step. Have a look at our courses, or book a free demo class and see our teaching style yourself.

This article is general education, not tax or legal advice. Rules and rates change, so check the official GST portal for the latest update.