Invoice GST Calculator
Calculate GST for an invoice, including the CGST and SGST split for an intra-state supply.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Your result
₹9,000
Total GST
AI explanation
Formula
GST = invoice value × rate. For an intra-state supply, CGST = SGST = GST / 2Worked example
₹50,000 invoice, 18% GST
| Field | Value |
|---|---|
| Invoice value (before GST) | 50000 |
| GST rate | 18 |
| Total GST | 9000 |
| CGST (half of GST) | 4500 |
| SGST (half of GST) | 4500 |
| Total invoice amount | 59000 |
Assumptions
- Assumes an intra-state supply, split equally between CGST (Central GST) and SGST (State GST). For an inter-state supply, the full amount would instead be charged as IGST.
- Informational only.
Frequently asked questions
What's the difference between CGST, SGST, and IGST?
For an intra-state supply (buyer and seller in the same state), GST splits equally into CGST (goes to the central government) and SGST (goes to the state government). For an inter-state supply, the full amount is charged as IGST instead.
How do I show CGST and SGST on my invoice?
As two separate line items, each at half your total GST rate — e.g. an 18% GST invoice shows 9% CGST and 9% SGST separately, summing to the same total GST amount.
What if my supply is inter-state?
Use the total "GST" figure as your IGST amount instead of splitting into CGST/SGST — this calculator's CGST/SGST split only applies to intra-state transactions.
Related calculators
Sources
- Central Goods and Services Tax Act, 2017 — Central Board of Indirect Taxes and Customs (CBIC). Effective 01-07-2017, reviewed 13-09-2026.
This calculator provides a general estimate only and does not constitute tax advice.
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