ArthaSiddhi
GST Calculator
Add GST to or remove GST from an entered amount.
Inputs and assumptions
Update any value to recalculate instantly.
Editable rate; presets are conveniences, not a complete rate list.
Estimated result
Full-precision engine values are formatted only for display.
Taxable value
₹1,00,000.00
GST rate
18%
CGST
₹9,000.00
SGST
₹9,000.00
IGST
₹0.00
Total GST
₹18,000.00
Invoice total
₹1,18,000.00
Rules & assumptions
- Rule period
- Rules verified 16 August 2026
- Last verified
- 2026-08-16
Official sources
- GST goods and services ratesCentral Board of Indirect Taxes and Customs
Based on the cited official material; verify current rules before making an actual decision.
How this is calculated
For GST-exclusive amounts, GST is added to the taxable value. For GST-inclusive amounts, the taxable value is derived by dividing the total by 1 + GST rate. Intra-state GST is split equally into CGST and SGST; inter-state GST is shown as IGST.
Important limitations
- GST rates depend on the actual goods or services and applicable rules; ArthaSiddhi does not determine HSN/SAC classification.
- Cess, special valuation situations, place-of-supply analysis, and return filing are outside scope.
- Transaction value and place-of-supply rules can affect actual tax treatment; this calculator performs arithmetic only.
Review the Financial Disclaimer before using an estimate for an important decision.