How India GST works
India's Goods and Services Tax uses multiple slabs. Many services are taxed at 18%. Intra-state supplies typically split into CGST + SGST (e.g. 9% + 9%), while inter-state supplies use IGST (e.g. 18%).
This calculator treats the combined rate as a single percentage — enter 18% for a typical service invoice. Example: ₹1,000 net → ₹180 GST → ₹1,180 gross. Reverse: ₹1,180 ÷ 1.18 = ₹1,000 net.
GST-registered businesses must issue tax invoices with GSTIN, place of supply, and tax breakup. After calculating here, create a GST-ready invoice in INR with InvoBuzz.
Reverse charge & inclusive prices
India applies reverse charge on specified goods and services (e.g. certain unregistered supplier scenarios). Confirm applicability under the CGST Act for your supply.
Invoice requirements
A GST tax invoice should include: GSTIN, invoice number/date, place of supply, HSN/SAC, taxable value, CGST/SGST or IGST rates and amounts, and total.