GST Invoice Format in India: Mandatory Fields Explained (2026)

A valid GST invoice must contain specific fields under GST rules.

Mandatory fields

• Supplier legal name and GSTIN
• Invoice number and date
• Recipient details and GSTIN (if registered)
• HSN/SAC, quantity, taxable value
• Tax rate and CGST/SGST/IGST breakup
• Total invoice value and signature

Sample invoice preview

Generate a correctly structured bill from the free GST invoice generator.