How it works
Supply taxable line amounts excluding GST and after any discount already applied. Tax each amount at its entered rate before adding the results. The intra-state labelled scenario splits the total evenly between CGST and SGST; the inter-state scenario displays it as IGST. A zero amount lets you omit an unused line.
Inputs and units
| Input | Example value | What to enter |
|---|---|---|
| Taxable amount of line 1 after discount | ₹10,000.00 | Required unit: ₹. Use a non-negative value. |
| GST rate for line 1 | 18 % | Enter the percentage as a number: for 15%, enter 15. Use a non-negative value. Allowed range: 0–100. |
| Taxable amount of line 2 after discount | ₹5,000.00 | Required unit: ₹. Use a non-negative value. |
| GST rate for line 2 | 12 % | Enter the percentage as a number: for 15%, enter 15. Use a non-negative value. Allowed range: 0–100. |
| Taxable amount of line 3 after discount | ₹2,000.00 | Required unit: ₹. Use a non-negative value. |
| GST rate for line 3 | 5 % | Enter the percentage as a number: for 15%, enter 15. Use a non-negative value. Allowed range: 0–100. |
| Selected supply scenario | Intra-state — CGST + SGST | Check the selected option before calculating. |
Worked example
Show example inputs and results
This example is generated by the same calculation engine using the starting values in the form. Your own inputs produce your own result.
- Taxable amount of line 1 after discount
- ₹10,000.00
- GST rate for line 1
- 18 %
- Taxable amount of line 2 after discount
- ₹5,000.00
- GST rate for line 2
- 12 %
- Taxable amount of line 3 after discount
- ₹2,000.00
- GST rate for line 3
- 5 %
- Selected supply scenario
- Intra-state — CGST + SGST
Complete example results
- Invoice total including entered GST
- ₹19,500.00
- Taxable subtotal
- ₹17,000.00
- Total GST
- ₹2,500.00
- CGST in the selected scenario
- ₹1,250.00
- SGST in the selected scenario
- ₹1,250.00
- IGST in the selected scenario
- ₹0.00
Reading the result
Match the rate period to the payment period. Fees and taxes absent from the inputs are not added automatically; compare totals with the same cost coverage.
Questions and answers
Can I use the example values for my own calculation?
The example values illustrate the calculation. Replace every input with your own information, especially dates, rates and the selected operation.
Does the tool find the appropriate rate for each invoice item?
No. Rates and the supply scenario are inputs for you to verify. The displayed rates are examples and do not classify products or services. This calculator does not establish place of supply, exemptions or entitlement to input tax credit.
Why are some results rounded?
Results display up to 8 decimal places. Calculations use the unrounded values; very small values use scientific notation. JavaScript floating-point arithmetic can introduce tiny rounding differences.
Are my inputs sent to a server?
The calculator processes inputs in your browser. Its code does not send your values to a server.
Method sources: cbic-gst.gov.in