FY 2025–26 / AY 2026–27
GST rate & HSN/SAC finder
Find common codes and calculate GST on an amount.
Reviewed 15 October 2026 · calculations run in your browser.
How the calculation works
Exclusive: GST = base × rate. Inclusive: base = total / (1 + rate). Intra-state tax is split equally; inter-state is IGST.
What you need to enter
- Common service / custom rate
- Custom GST rate (used for custom selection) (%)
- Invoice amount
- Amount entered is
- Supply type
Assumptions and limitations
Limited common-service reference, not a complete tariff search. Classification, supply conditions and exemptions control the rate. Use custom rate for other items after checking CBIC. GST is rounded here for display; use invoice-level precision in filings.
SAC 998313 is IT consulting/support, not all software. Design/development has a different code. The three service examples assume a normal taxable supply at 18%; exemptions, place of supply and reverse charge need separate verification. This is not a complete HSN database.