Understanding GST Calculation in India (2026 Rules)
Goods and Services Tax (GST) is calculated either as an additional percentage on top of the base product price (Exclusive GST) or extracted from a maximum retail price (Inclusive GST). Using the ALLINONETOOLS GST Calculator guarantees error-free tax invoices and compliance.
GST Formulas
- Add GST (Exclusive): Total = Base + (Base * Rate / 100)
- Remove GST (Inclusive): Base = Total / (1 + Rate / 100), GST Amount = Total - Base
- Intra-State Split: CGST = Total GST / 2, SGST = Total GST / 2
- Inter-State: IGST = Total GST