What is a GST Invoice?

A GST invoice is a document issued by a registered supplier to record the sale of goods or services. It includes details like GSTIN, HSN/SAC codes, tax rate, quantity, and applicable CGST/SGST/IGST. It’s mandatory for claiming Input Tax Credit (ITC).

For insights into numbering structure, visit our guide: GST Invoice Numbering Best Practices.

Mandatory Fields Checklist

• Supplier details: Name, address, GSTIN
• Invoice metadata: Invoice number, date
• Recipient details: Name, address, GSTIN (if registered)
• Item lines: Description, HSN/SAC, quantity, rate, taxable value
• Tax breakdown: CGST/SGST or IGST rates & values
• Total amount in words & figures
• Payment terms, due date, authorized signature

Formats: Excel, Word & PDF

Step-by-Step: Creating a GST Invoice

1. Set branding: Logo and company header
2. Numbering: Unique invoice number like INV-25-0001
3. Buyer details: GSTIN, state code
4. Item information: HSN/SAC, unit, rate, tax
5. Calculate tax: Apply correct GST rate
6. Add terms: Payment terms, bank info
7. Finalize: Total amount, signature, optional QR code

Need clarification on billing structure? Visit: GST Mentor Guide.

Industry-Specific Invoice Examples

• Retail: Bulk items, simplified HSN listing
• Freelancers: SAC code, hourly/project billing
• Transport: Freight charges, consignment details
• Restaurants: Item-wise GST, service charge

Explore real formats via Mazu GST Templates.

Common Mistakes to Avoid

• Incorrect HSN/SAC codes
• Wrong GST selection (IGST vs CGST/SGST)
• Duplicate invoice numbering
• Missing payment terms
• Amount not written in words

Download our internal checklist: GST Compliance PDF.

Templates & Online Generators

• Vyapar Templates
• ExcelDataPro Templates
• Wise Generator

Also try our in-house tools: GST Calculator and HSN Code Finder.

Internal Tools & Tutorials