Add GST
I know the price before GST. Enter the amount before GST and add GST to see the amount including GST.
Free Tools GST & Tax Tools
GST Calculator
Add GST, remove GST from a final amount, or find the GST amount with a clear CGST/SGST or IGST breakup.
Calculation result
Amount including GST
₹11,800.00
GST rate: 18%
- Amount before GST
- ₹10,000.00
- GST added
- ₹1,800.00
- Amount including GST
- ₹11,800.00
Intra-state · CGST + SGST
- CGST 9%
- ₹900.00
- SGST 9%
- ₹900.00
View full breakup
- Amount before GST
- ₹10,000.00
- Amount before GST
- ₹10,000.00
- GST rate
- 18%
- GST amount
- ₹1,800.00
- CGST (9%)
- ₹900.00
- SGST (9%)
- ₹900.00
- Amount including GST
- ₹11,800.00
Amounts are rounded to two decimal places. The displayed split components reconcile to the displayed GST amount.
A planning and calculation aid. This does not issue a tax invoice, file a GST return or generate an e-invoice.
Remove / Extract GST
I know the final price including GST. Enter it to separate the amount before GST and GST included.
Find GST Amount
I want to know how much GST applies to the price before GST. Enter the amount before GST to calculate the tax and amount including GST.
CGST, SGST and IGST
In the intra-state calculation, total GST is divided into CGST and SGST. In the inter-state calculation, the same total is shown as IGST. Select one tax type for the calculation; do not add all three components together.
The formulas
- Add GST
- GST = amount before GST × rate ÷ 100
Amount including GST = amount before GST + GST - Remove / Extract GST
- Amount before GST = amount including GST × 100 ÷ (100 + rate)
GST included = amount including GST − amount before GST - Find GST Amount
- GST amount = amount before GST × rate ÷ 100
Amount including GST = amount before GST + GST amount - Components
- Intra-state: CGST = GST ÷ 2; SGST = GST ÷ 2
Inter-state: IGST = GST
Worked example
At ₹1,000 and an illustrative rate of 5%, Add GST shows ₹50 GST and ₹1,050 including GST. Remove / Extract GST from ₹1,000 shows ₹952.38 before GST and ₹47.62 GST included. Find GST Amount on ₹1,000 shows ₹50 GST and ₹1,050 including GST.
For an intra-state calculation at 18%, ₹180 GST is shown as ₹90 CGST and ₹90 SGST. For an inter-state calculation, the same ₹180 is shown as IGST.
Common mistakes to avoid
- Entering a final price in Add GST when it already includes GST.
- Adding CGST and SGST to IGST for the same calculation.
- Assuming a preset identifies the rate for a product or service.
- Treating this calculation as a filed return, tax advice, e-invoice or tax invoice.