GST Calculator
Add GST to an amount or take it out of a GST-inclusive price, at the slabs in force since 22 September 2025
Invoice total, including GST
₹11,800.00
- GST
- ₹1,800.00
- Rate
- 18%
Breakdown
- Taxable value
- ₹10,000.00
- CGST at 9%
- ₹900.00
- SGST at 9%
- ₹900.00
- Invoice total
- ₹11,800.00
GST rate slabs — set by GST Council / Central Board of Indirect Taxes and Customs. Last verified .
The slabs in force since 22 September 2025: 0%, 5%, 18% and 40%, with the special 0.25% and 3% rates; the 12% and 28% slabs are offered only for invoices dated before then. Which slab a particular good or service falls in is a classification question: check the CBIC rate finder for your HSN/SAC code. Reconciled across reports of the reform, not the notification text.
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How this is calculated
Formula
GST = amount × rate ÷ 100
With your numbers
- 1GSTamount × rate ÷ 100₹10,000.00 × 18 ÷ 100 = ₹1,800.00
- 2Invoice totalamount + GST₹11,800.00
- Within a state the tax splits equally: CGST 9% + SGST 9%.
- Amounts are shown to the paisa; an invoice may round each tax line to the rupee.
Frequently Asked Questions
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