Reverse GST Calculator
Find base amount from GST-inclusive prices
Extract GST component from total amount
Supports all GST slabs and supply types
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Reverse GST Calculator
Reverse GST
Calculation Breakdown
Final Amount: ₹11800.00 (including 18% GST)
Original Taxable Value: ₹10000.00
GST Portion: ₹1800.00
Original Taxable Value
₹10000.00
Base amount before GST
GST Portion
₹1800.00
GST amount included
GST Breakdown
CGST
₹900.00
9% (Central)
SGST
₹900.00
9% (State)
IGST
₹0.00
18% (Integrated)
GST Rate Explanation
18% GST is commonly applicable to IT services, SaaS, consulting, telecom services, financial services, and most industrial goods.
Frequently Asked Questions
A Reverse GST calculator helps you find the original price (taxable value) and the GST portion from an amount that already includes GST. For example, if you paid ₹118 including 18% GST, the reverse calculator shows ₹100 base price + ₹18 GST.
Reverse GST calculation is useful when you have a bill with GST-inclusive amount and need to determine the actual product cost and tax paid separately. It helps in accounting, auditing, and understanding the tax component of purchases.
The formula is: GST Amount = (Inclusive Amount × GST Rate) ÷ (100 + GST Rate). The taxable value is then: Taxable Value = Inclusive Amount - GST Amount.
No, the calculation remains the same. The only difference is how the total GST is displayed - for intra-state, it shows as CGST + SGST (split equally), and for inter-state, it shows as IGST (full amount).