GST Calculator – Add or Remove GST
Calculate GST amounts for 5%, 12%, 18%, and 28% tax slabs. Add GST to net prices or calculate reverse pre-tax base prices with CGST, SGST, and IGST splits.
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GST Slabs Comparison on ₹10,000
| GST Slab | Net Base | CGST | SGST | Total Invoice Price |
|---|---|---|---|---|
| 0% GST | ₹10,000 | ₹0 | ₹0 | ₹10,000 |
| 5% GST | ₹10,000 | ₹250 | ₹250 | ₹10,500 |
| 12% GST | ₹10,000 | ₹600 | ₹600 | ₹11,200 |
| 18% GST (Selected) | ₹10,000 | ₹900 | ₹900 | ₹11,800 |
| 28% GST | ₹10,000 | ₹1,400 | ₹1,400 | ₹12,800 |
Example: 18% GST on ₹10,000 Product
Calculating GST for a business transaction on a net invoice value of ₹10,000 at 18% rate.
- Base Amount:₹10,000
- GST Rate:18%
- Calculation Mode:Add GST (Exclusive)
- CGST (9%):₹900
- SGST (9%):₹900
- Total Gross Invoice:₹11,800
Key Takeaway: For intra-state sales, the 18% tax is split equally into 9% CGST and 9% SGST.
How This Calculation Works (Mathematical Formula)
Calculates total invoice price for buyers or base invoice amount and tax breakdown for business sellers.
Frequently Asked Questions
To add GST: GST Amount = (Base Amount × GST Rate) ÷ 100. The total gross invoice = Base Amount + GST Amount. For example, 18% GST on ₹10,000 = ₹1,800, making the total ₹11,800.
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Helpful Guides & Explanations
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