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Key takeaways
- A supplier issues a GST debit note when the taxable value or the tax charged on an invoice is less than what is payable, under section 34(3).
- The law sets no time limit for issuing a debit note.
- The supplier reports it in the return for the month in which it is issued.
- The content follows rule 53, including a sequential number of up to 16 characters.
Free PDF and Excel: GST debit note template and reason log. Get it below
Debit note under GST
A GST debit note is a document issued by a registered supplier to increase the taxable value or tax on an earlier invoice, under section 34(3) of the CGST Act.
The general meaning of a debit note is on our debit note page. Here we cover the Indian tax rules. A debit note under GST is not the buyer's return notice. Under section 34 only the supplier issues it, and the recipient cannot issue a credit or debit note.
A manufacturer invoices INR 4,00,000 plus 18 percent GST. A price escalation clause agreed in the contract later raises the price by INR 20,000. The manufacturer issues a debit note for INR 20,000 plus INR 3,600 GST, quoting the original invoice.
The supplier reports it in the return for the month of issue. The buyer adds INR 3,600 to its input credit, subject to the usual conditions.
When a supplier issues one
- The invoice undercharged the taxable value.
- The tax rate was applied too low.
- A price rise or escalation was agreed after the original invoice.
- Charges such as freight were missed on the invoice.
- Quantity delivered was more than invoiced.
Free PDF and Excel
GST debit note template and reason log
A GST debit note layout with rule 53 fields and a log of reasons for upward adjustments.
- Debit note layout
- Section 34 summary
- Reason log
- Excel debit note register
Rules at a glance
| Point | Rule |
|---|---|
| Who issues | The registered supplier only |
| Time limit | None under section 34(3) |
| Reporting | In the return for the month the debit note is issued |
| Content | Supplier and recipient details, original invoice number and date, taxable value, tax, number up to 16 characters, signature |
| Tax effect | Increases output tax of the supplier and adds credit for the recipient |
Fields
| Field | What goes in it | Why it matters |
|---|---|---|
| Number and date | Consecutive number up to 16 characters and date. | Date decides the return month. |
| Supplier and recipient | Names, addresses, GSTIN. | Needed for matching. |
| Original invoice | Number and date. | Links the adjustment. |
| Additional value and tax | Extra taxable value, rate and tax. | Must reconcile. |
| Reason | Plain explanation. | Useful for audit. |
| Signature | Of the supplier. | Required particular. |
Pair this page with credit note in GST for the opposite direction, and with GST tax invoice for the invoice itself. Large taxpayers should also check e-invoice reporting at e-invoice in GST.
- The reason is documented and agreed with the buyer.
- Original invoice number and date are cited.
- The tax rate is correct.
- The number is in sequence.
- It will be reported in the month of issue.
- E-invoice reporting is handled if applicable.
Last checked: 19 October 2026. Checked against a published summary of section 34 of the CGST Act and rule 53. Confirm the current text with a chartered accountant.
Frequently asked questions
Is there a time limit for a GST debit note?
Section 34(3) sets none, according to published summaries. The supplier reports it in the return for the month of issue.
Can a buyer issue a debit note under GST?
No. Under section 34 only the registered supplier issues credit and debit notes. A buyer can request one.
Does a debit note increase tax?
Yes. It raises the supplier's output tax and gives the recipient additional input credit, subject to conditions.
How is a debit note different from a supplementary invoice?
The tax law treats a debit note as the document for upward adjustment of an earlier invoice. Ask your adviser how it applies in a given case.
Must the debit note be on the e-invoice portal?
If the supplier is covered by e-invoicing, yes, subject to the notified rules.