GST (Goods and Services Tax)

GST (Goods and Services Tax) is India's single, unified indirect tax on the supply of goods and services. It is charged at the point of supply — not on income — and is passed along through each stage of the chain, ending up in the final price a consumer pays. India introduced it on 1 July 2017, replacing a patchwork of earlier indirect taxes such as VAT, service tax, excise duty and octroi with one nationwide framework.

How it works

GST is a multi-stage, destination-based tax. A manufacturer, wholesaler and retailer each collect GST on their sales but can claim back the GST they paid on their own purchases (the input tax credit). This avoids the problem of "tax on tax" that plagued the older system, so the consumer ultimately bears tax only on the value added at each step rather than on the entire selling price repeatedly.

The applied rate depends on the category of the good or service. The main slabs are:

• 0% for essential, largely unprocessed items
• 5% for common household goods
• 12% and 18% for most services and processed goods
• 28% for luxury and sin goods, sometimes with an additional cess

Doing the math

To add GST to a base price:

GST payable = amount × (rate ÷ 100)
Final price  = amount + GST

To extract GST from a price that already includes it:

Base = inclusive price ÷ (1 + rate ÷ 100)

For example, on a ₹1,000 item at 18%, GST adds ₹180 for a total of ₹1,180. Conversely, from a ₹1,180 inclusive price, the base works back to ₹1,000.

Common misconceptions

• "GST means you pay more tax." Not necessarily — the input-tax-credit mechanism removes the old cascading "tax on tax", and many prices stayed similar or fell once the credits flowed through.
• "GST applies only to businesses." It is passed on to end consumers in the final price; businesses claim credits along the chain, but the consumer ultimately bears the tax.
• "One rate for everything." GST uses several slabs depending on the category, so the rate varies by item and service.

Why it matters

GST simplified a complex, state-by-state tangle into predictable national rates, made cross-state trade smoother, and made the tax base more transparent. Rates and exemptions do change with council notifications, so treat examples as illustrations and verify current rates for your item. For either adding or extracting tax, the GST Calculator handles it in one step.