GST Invoice Format India: Complete Guide with Free Generator

What Is a GST Invoice?

A GST (Goods and Services Tax) invoice is a mandatory document for businesses registered under India's GST regime. It serves as proof of supply of goods or services and is required for claiming Input Tax Credit (ITC). Every GST-registered business must issue GST-compliant invoices for taxable supplies.

Mandatory Fields in a GST Invoice

Under the CGST Act, a GST invoice must contain these fields:

1. Supplier details — Name, address, and GSTIN of the supplier
2. Invoice number — Unique, sequential, and not exceeding 16 characters
3. Date of issue
4. Recipient details — Name, address, and GSTIN (if registered) of the recipient
5. HSN/SAC code — Harmonized System of Nomenclature for goods, Services Accounting Code for services
6. Description of goods/services
7. Quantity and unit
8. Taxable value
9. Tax rates and amounts — CGST, SGST (intra-state) or IGST (inter-state)
10. Place of supply
11. Total invoice value
12. Signature or digital signature

CGST vs SGST vs IGST — When to Use Which

Intra-state supply (seller and buyer in same state): Split the GST rate equally between CGST and SGST. For example, 18% GST = 9% CGST + 9% SGST.

Inter-state supply (seller and buyer in different states): Apply the full rate as IGST. For example, 18% GST = 18% IGST.

Generate GST Invoices Automatically with Clorefy

Clorefy automatically detects when you're creating an invoice for an Indian business and applies the correct GST format. It calculates CGST/SGST or IGST based on the place of supply, adds your GSTIN, and formats everything according to GST rules. Just describe your invoice and the AI handles compliance.