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GST Calculator

Add GST to a price, or back out the tax from an inclusive amount. Since 22 September 2025 most goods and services are taxed at 5% or 18%, with 40% for a select few — other rates exist.

Calculation
Rate shortcuts

Since 22 September 2025 most goods and services are taxed at 5% or 18%, with 40% for a select few. Other rates exist, including nil, and a supply made before that date can carry the older 12% or 28%. The rate for an item comes from its HSN/SAC classification: this tool does not pick one, apply exemptions or add compensation cess, so type the rate that applies.

How this is calculated

Add GST: tax = amount × rate / 100, total = amount + tax.

Remove GST: taxable value = amount / (1 + rate/100), tax = amount − taxable value.

Worked examples

  • Add 18% GST to ₹1,000

    • GST = 18% of 1,000

    ₹180 GST · ₹1,180 total

  • ₹1,180 inclusive of 18% GST

    • Base = 1,180 ÷ 1.18

    ₹1,000 base · ₹180 GST

Useful for

  • Invoice a customer exclusive of GST
  • Back out GST from an inclusive MRP

Learn more

Questions

Which GST rate should I use?

It depends on the goods or service. Since 22 September 2025 most goods and services are taxed at 5% or 18%, with 40% for a select few goods and services. Some items, such as Indian breads and certain life-saving medicines, are nil-rated. A supply made before 22 September 2025 can carry the older 12% or 28% slabs, and cigarettes and some tobacco products keep their earlier rates and cess until a date to be notified. Confirm the HSN/SAC rate before filing or invoicing. This tool does not recommend a tax category.

Does Janooji tell me which GST rate applies?

No. You must already know the HSN/SAC category. Since 22 September 2025 most goods and services are taxed at 5% or 18%, with 40% for a select few goods and services. A supply made before that date can carry the older 12% or 28% slabs, which you can enter as a custom rate. Compensation cess is not added by this tool.

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