Every GST-registered supplier must issue a document as evidence of supply. The choice between a tax invoice and a bill of supply is not optional — it is determined by the taxability of the supply. Issuing the wrong document creates ITC disputes, return mismatches, and penalty exposure under Sections 122 and 132.
This article explains the distinction and provides a practical guide for correct invoicing.
Tax Invoice: For Taxable Supplies
A tax invoice is the standard document for taxable supplies of goods or services. It is issued under Section 31 and must contain the prescribed particulars under Rule 46, including:
- Supplier's name, address, and GSTIN.
- Invoice number (consecutive serial number, up to 16 characters).
- Date of issue.
- Recipient's name, address, and GSTIN (if registered).
- HSN/SAC code.
- Description, quantity, and value of goods or services.
- Taxable value, GST rate, and tax amount (CGST, SGST, IGST, or cess).
- Place of supply.
Time of issue:
- Goods: Before or at the time of removal/delivery.
- Services: Within 30 days from the date of supply (45 days for banking, insurance, and NBFC sectors).
Bill of Supply: For Exempt and Composition Supplies
A bill of supply is issued under Section 31(3)(c) and Rule 49 by:
- Composition taxpayers.
- Suppliers of exempt goods or services.
- Exporters who are not charging GST on zero-rated supplies (in certain cases).
A bill of supply does not show GST separately, and the buyer cannot claim ITC on the basis of a bill of supply.
Key Differences
| Feature | Tax Invoice | Bill of Supply |
|---|---|---|
| Applicability | Taxable supplies | Exempt supplies, composition |
| GST charged | Yes | No |
| ITC for buyer | Available | Not available |
| Section | 31(1) and Rule 46 | 31(3)(c) and Rule 49 |
| HSN/SAC code | Mandatory | Optional (not mandatory) |
Consequences of Issuing the Wrong Document
- Tax invoice for exempt supply: Buyer may wrongly claim ITC, creating a mismatch and a demand notice.
- Bill of supply for taxable supply: Buyer loses ITC, and the supplier faces penalties for non-issuance of tax invoice under Section 122.
- Prosecution risk: Issuing false invoices can attract prosecution under Section 132.
Practical Compliance Steps
- Determine the taxability of every supply before choosing the document.
- Use the correct document type consistently.
- Ensure all mandatory fields are filled.
- Train billing staff on the distinction.
- Review invoicing periodically for accuracy.
Conclusion
The choice between a tax invoice and a bill of supply is determined by the taxability of the supply. Getting it wrong creates ITC disputes and penalty exposure. Businesses must ensure that their invoicing system applies the correct document type for every transaction.
At Anuj Desai & Associates, we provide expert advisory services on GST invoicing compliance. Our team can help you review and correct your invoicing processes.
For a confidential consultation, contact us at office@anujdesaiassociates.com or call 9619456656. Visit our website at https://anujdesaiassociates.com or connect with our founder on LinkedIn at linkedin.com/in/ca-anuj-desai-122547230.