Related Business Tools
Free GST Tax Invoice Generator — India (Rule 46 Compliant)
Detects intra vs inter-state from Place of Supply. Splits tax correctly per line item.
B2B, B2C, Export, SEZ, Bill of Supply, Reverse Charge — all supported with type-specific fields.
Mandatory on GST invoices — auto-generated in Indian number system (lakhs, crores).
All Indian states and Union Territories with correct state codes for Place of Supply selection.
Real-time format check: 15-char pattern, state code from GSTIN auto-matched to supplier state.
A4 invoice with all mandatory fields, line-item tax breakdown, amount in words, signature.
Frequently Asked Questions
When supplier and buyer are in the same state (intra-state), the GST is split equally into CGST (Central) and SGST (State). For example, 18% GST = 9% CGST + 9% SGST. When they are in different states (inter-state), IGST (Integrated GST) at the full rate applies. For exports and SEZ supplies, IGST applies (zero-rated or with payment). The determination is based on Place of Supply, not the delivery address.
Rule 46 of CGST Rules mandates: "TAX INVOICE" heading, supplier name/address/GSTIN, unique sequential invoice number (max 16 chars), invoice date, buyer name/address/GSTIN (for B2B), place of supply, HSN/SAC code, description, quantity, unit, taxable value, GST rate, tax amount (CGST+SGST or IGST), total invoice value, reverse charge indicator, and supplier's signature or digital signature.
Use CGST+SGST when the supplier's state and the Place of Supply are the same (intra-state transaction). Use IGST when they are in different states (inter-state transaction). SEZ supplies, exports, and imports are always treated as inter-state and attract IGST. The Place of Supply is defined in the IGST Act — not the delivery address.
The invoice serial number must be a unique, consecutive number within a financial year (April–March). It must not exceed 16 characters. Allowed characters are alphanumeric and special characters dash (-) and slash (/). Non-sequential invoice numbers trigger audit flags in GST filings.
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A Bill of Supply is issued instead of a Tax Invoice when GST cannot be charged — for example, by composition scheme dealers, for exempt supplies, or for nil-rated goods/services. It must say "Bill of Supply" (not "Tax Invoice") and must state that no GST is charged. The buyer cannot claim ITC from a Bill of Supply.
Under RCM, the tax liability is shifted from the supplier to the recipient. The buyer pays GST directly to the government instead of to the seller. This applies to specific goods and services notified by the government, and when a registered person purchases from an unregistered supplier above certain thresholds. The invoice must clearly state "Reverse Charge: Yes".
HSN (Harmonized System of Nomenclature) codes classify goods. SAC codes classify services. Businesses with annual turnover up to ₹5 crore must use 4-digit HSN codes on B2B invoices. Businesses with turnover above ₹5 crore must use 6-digit HSN codes on all invoices. HSN codes are mandatory for GSTR-1 filing and incorrect codes can cause ITC rejection.