How many copies and when
For goods, prepare the invoice in triplicate: original for the recipient, duplicate for the transporter and triplicate for the supplier. For services, in duplicate: original for the recipient and duplicate for the supplier (Rule 48). Issue it before or at the time of removal or delivery of goods, and within 30 days of supplying a service (section 31 and Rule 47).
For a sale under ₹200 to an unregistered buyer who does not want an invoice, you may issue one consolidated tax invoice for the day (proviso to Rule 46).
Common mistakes
- Restarting invoice numbers in the middle of a year, or using the same series in two branches. Each series must be unique in the financial year.
- Charging CGST + SGST when the place of supply is in another state.
- Leaving out the place of supply or the reverse charge line.
- Using GST rates from before 22 September 2025 for current sales.
Official sources
- CBIC tax information portal: section 31 of the CGST Act; Rules 46, 46A, 47, 48 and 49 of the CGST Rules; Notifications 78/2020 and 10/2023-Central Tax.
Checked on 28 October 2026.