An incomplete invoice can delay payments, create customer disputes, and cause GST audits. To ensure compliance with commercial law and the Indian GST framework, here is the complete 16-point invoice checklist.

The 16 Essential Invoice Details

  1. Document Heading: Clearly titled "Tax Invoice", "Commercial Invoice", or "Bill of Supply".
  2. Supplier Business Details: Name, registered office address, phone number, and email. 3. Supplier GSTIN & PAN: 15-digit GSTIN and 10-digit PAN. 4. Unique Serial Number: Chronological invoice number up to 16 characters. 5. Invoice Date: Date of issuance. 6. Due Date / Payment Terms: Expected settlement date (e.g., Net 15, Net 30, Due on Receipt). 7. Customer Billing Details: Client entity name, contact person, and billing address. 8. Customer GSTIN: Crucial for B2B transactions to pass Input Tax Credit. 9. Place of Supply: State name and two-digit code (e.g., 27 - Maharashtra). 10. Itemized Description: Clear description of goods supplied or services rendered. 11. HSN/SAC Code: Classification code for each item. 12. Quantity and Unit: Quantity with standard units (PCS, NOS, KGS, HRS). 13. Unit Rate & Discounts: Gross rate per item and line-item discount. 14. Tax Breakdown: Segregated CGST, SGST, or IGST amounts with tax percentages. 15. Total in Figures & Words: Reduces ambiguity and prevents tampering. 16. Bank / Payment Details & Signature: Account number, IFSC code, UPI ID, and authorized signatory.

    Verify your invoices against this checklist or generate fully compliant bills using our Free Invoice Generator.