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Key takeaways
- A seller issues a debit note when the original invoice was too low and more is owed. A buyer issues one when it is returning goods or disputing a charge.
- A debit note is a business document that adjusts an earlier invoice. It must point to that invoice by number and date.
- In India, section 34 of the CGST Act governs a supplier's debit note, and the note must be reported in the return for the month it is issued.
- Never send a debit note without agreement or evidence. It starts a dispute if the other side did not expect it.
Free PDF and Excel: Debit note template and reason codes. Get it below
Two meanings, one name
A debit note is a document that increases the amount owed on an earlier invoice, or that a buyer sends to a supplier to record goods returned or a charge disputed.
Supplier side: an invoice listed 100 units but you shipped 110, or freight was left off. You send a debit note for the difference. It adds to what the buyer owes.
Buyer side: ten units arrived broken. You return them and send the supplier a debit note. It reduces what you owe, and the supplier answers with a credit note. If you only remember one thing, remember this pairing: a debit note asks, and a credit note agrees.
A tile maker invoices a builder for 800 square metres at 20.00. At the site the builder's team counts 900 square metres delivered. The tile maker issues a debit note for 100 square metres at 20.00, a total of 2,000.00, citing the original invoice number and date.
Separately, the builder rejects 15 broken boxes and issues its own debit note to the tile maker for the cost of those boxes. The tile maker confirms with a credit note.
What a debit note must show
| Field | What goes in it | Why it matters |
|---|---|---|
| Title and number | The words Debit Note and a sequential number. | Auditors check the sequence for gaps. |
| Issue date | Date written, not the date of the original invoice. | Drives the tax period it is reported in. |
| Issuer and recipient | Names, addresses and tax numbers. | Needed to claim or reverse tax correctly. |
| Original invoice reference | Number and date of the invoice being adjusted. | Ties the two documents together. |
| Reason | Short and specific: quantity short-billed, freight omitted, goods returned. | A reason that can be read without a call. |
| Amounts | Value of the adjustment, tax rate and tax amount, new total. | Must add up on its own. |
| Authorised signature | Name and signature or digital signature. | Shows it was approved. |
Free PDF and Excel
Debit note template and reason codes
A debit note layout with space for the original invoice reference, plus reason codes your accounts team can use.
- Debit note layout
- Reason code list
- Pre-issue checklist
- Excel register with running total
Indian rules in brief
Under section 34(3) of the CGST Act, a registered supplier issues a debit note when the taxable value or tax charged on an invoice is less than what is payable. The law sets no time limit for a debit note, and the supplier declares it in the return for the month it was issued. The note carries the particulars set out in rule 53 of the CGST Rules, such as a serial number of up to 16 characters, the original invoice details and the signature. See the GST debit note guide for the tax treatment in full.
Last checked: 19 October 2026. Section 34 of the CGST Act and rule 53 of the CGST Rules as published on the Indian government portals and summarised by tax publishers. Confirm current text with your tax adviser.
Debit note mistakes
- No reference to the original invoice, so the AP clerk cannot match it.
- A buyer debit note raised before the supplier has agreed to the return.
- Using a debit note to chase a late-payment fee that the contract does not allow.
- Issuing the note in the wrong period and reporting it late.
- Writing a negative invoice instead of a debit or credit note.
- The original invoice number and date are quoted.
- The reason is written in plain words.
- The amount reconciles to the evidence.
- Tax is shown separately if applicable.
- The recipient has been told to expect it.
- The note is entered in the right period.
Frequently asked questions
Who issues a debit note, the buyer or the seller?
Either. The seller issues one to raise the amount owed. The buyer issues one to record returned goods or a disputed charge and to ask for a credit.
Is a debit note the same as an invoice?
No. It adjusts an invoice you have already issued. It does not stand alone as a sale.
What is the opposite of a debit note?
A credit note, which reduces the amount owed.
Do I need a debit note to correct a small mistake?
If the original invoice is within your correction window and not yet booked by the buyer, a corrected invoice may be cleaner. Ask your accountant which your tax rules prefer.
Can a debit note include tax?
Yes, when the original sale was taxable. The tax is shown separately and follows the rate that applied to the original supply.