Under Section 31(3)(a) of the CGST Act, a revised invoice is issued by a newly registered person, within one month of the registration certificate being issued, for supplies made between the effective date of registration and the certificate date. It must say Revised Invoice and follow Rule 53(1). It is not a general way to correct mistakes; those use credit notes, debit notes or GSTR-1 amendments.
"Revised invoice" is one of the most misused phrases in Indian billing. In everyday business it means "the corrected bill". Under GST it has a narrow legal meaning: a document a newly registered business issues for sales made before its registration certificate arrived, but after the date from which its registration took effect.
This guide explains that specific case, what a revised invoice must contain, the one-month deadline, the consolidated options for small customers, and which document to use for ordinary corrections. If you are fixing a regular invoice, you most likely need a credit note or a debit note instead.
What is a revised invoice under GST law?
Section 31(3)(a) of the CGST Act says a registered person may, within one month from the date of issuance of the certificate of registration, issue a revised invoice against invoices already issued during the period from the effective date of registration till the date of issuance of the certificate.
Rule 53(2) repeats this: a person granted registration with effect from a date earlier than the certificate date may issue revised tax invoices for taxable supplies made between the effective date and the certificate date.
Why the gap exists
Registration often takes effect from a date earlier than the day the certificate is issued. For example, when a person applies on time after becoming liable, the registration can take effect from the date liability arose. During the gap, the business was legally registered but did not have a GSTIN to print, so its invoices could not show GST properly. The revised invoice fixes that.
Revised invoice vs credit note vs debit note vs amendment
| Situation | Correct document |
|---|---|
| Sales between effective date of registration and certificate date | Revised invoice under Section 31(3)(a) |
| Value or tax charged too high; goods returned; deficient supply | Credit note under Section 34(1) |
| Value or tax charged too low | Debit note under Section 34(3) |
| Wrong GSTIN, invoice number, date or place of supply already reported | Amendment in GSTR-1 |
| Invoice issued in error and supply never happened | Cancel the invoice (or the e-invoice IRN within the allowed window) |
The everyday "revised bill" usually belongs in rows two to five, not row one.
What must a revised invoice contain?
Rule 53(1) lists the particulars:
- The words "Revised Invoice", wherever applicable, indicated prominently
- Supplier name, address and GSTIN
- Consecutive serial number, max 16 characters, unique for the financial year
- Date of issue
- Recipient name, address and GSTIN/UIN, if registered
- For unregistered recipients: name, address, delivery address, state name and code
- Serial number and date of the corresponding tax invoice or bill of supply
- Signature or digital signature of the supplier or authorised representative
Two older clauses of Rule 53(1) were omitted from 1 February 2019, when credit and debit note particulars were moved into the separate Rule 53(1A).
Because a revised invoice records the GST on the original supply, include the full tax details as on a tax invoice (HSN/SAC, taxable value, rate and tax by head), so your buyer and your return both have the full picture. The tax invoice fields are listed in mandatory fields in a GST invoice.
What are the consolidated revised invoice options?
Rule 53(2) has two provisos to save paperwork when customers are unregistered:
- All unregistered recipients: a consolidated revised tax invoice may be issued for all taxable supplies made to recipients not registered under the Act during the period.
- Inter-state supplies to unregistered recipients: where the value of a supply does not exceed ₹2,50,000, a consolidated revised invoice may be issued separately for all unregistered recipients located in a State.
Registered buyers each need their own revised invoice, because they need it to support their credit.
Worked example: a Nagpur trader registered retrospectively
A Nagpur electrical goods trader's turnover crosses the registration threshold. It applies in time, and registration is granted effective 1 July 2026, but the certificate is issued on 18 July 2026. Between 1 and 18 July it made these sales without charging GST:
| Original bill | Date | Customer | Value charged | Status |
|---|---|---|---|---|
| 0231 | 3 July | Contractor A (registered, Nagpur) | ₹59,000 | Registered |
| 0232 | 6 July | Walk-in customers (many) | ₹47,200 total | Unregistered, in Maharashtra |
| 0233 | 10 July | Shop B (registered, Raipur, Chhattisgarh) | ₹1,18,000 | Registered, inter-state |
Assume the goods are taxable at 18% and the customers agree the amounts billed were GST-inclusive.
Revised invoice RI/26-27/0001 to Contractor A (intra-state)
- Taxable value = 59,000 ÷ 1.18 = ₹50,000
- CGST 9% = ₹4,500; SGST 9% = ₹4,500
- Reference: bill 0231 dated 3 July 2026
Consolidated revised invoice RI/26-27/0002 for unregistered customers (intra-state)
- Taxable value = 47,200 ÷ 1.18 = ₹40,000
- CGST 9% = ₹3,600; SGST 9% = ₹3,600
- Reference: bills issued to unregistered customers during 1–18 July
Revised invoice RI/26-27/0003 to Shop B (inter-state)
- Taxable value = 1,18,000 ÷ 1.18 = ₹1,00,000
- IGST 18% = ₹18,000
- Reference: bill 0233 dated 10 July 2026
- Place of supply: Chhattisgarh (22)
Deadline: all three must be issued by 18 August 2026, one month from the certificate date.
Total GST on the gap period: 4,500 + 4,500 + 3,600 + 3,600 + 18,000 = ₹34,200, reported in the trader's first returns. You can check the back-calculations with the GST calculator.
If the amounts billed were not GST-inclusive and the customers will pay tax on top, the taxable values would be the original amounts and the tax would be added; that is a commercial negotiation to settle with each customer before issuing the documents.
How do you issue revised invoices step by step?
- Note the two dates on your registration: effective date and certificate date. The window is one month from the certificate date.
- List every sale made between those dates, with customer, value and registration status.
- Decide the tax treatment of each amount (inclusive or extra) and agree it with registered customers.
- Group unregistered customers into consolidated revised invoices where Rule 53(2) allows.
- Open a separate series such as RI/26-27/0001 for revised invoices.
- Issue each revised invoice with the words "Revised Invoice", the original bill reference and full tax details.
- Share with registered buyers so they can account for the tax.
- Report in your returns for the period, then switch to normal tax invoices for all sales after the certificate date. The filing process is in GSTR-1 filing guide.
Billing Software by Betterwork lets you set up a dedicated revised-invoice series and pull customer and item details from the original bills, so the references stay accurate.
What if a customer refuses to pay the extra GST?
This is the most common practical problem with revised invoices. The original bills were raised without GST, the customer paid, and now you are asking for tax on top. There are three ways to settle it:
| Approach | Taxable value | GST | Who bears the tax |
|---|---|---|---|
| Treat original price as GST-inclusive | Original amount ÷ (1 + rate) | Carved out of the original amount | Supplier (margin falls) |
| Charge GST on top | Original amount | Added and collected from customer | Customer |
| Split the difference by agreement | As agreed | As computed | Shared |
Take a single sale of ₹50,000 at 18%:
- Inclusive: taxable value = 50,000 ÷ 1.18 = ₹42,372.88; GST = ₹7,627.12. You collect nothing more; your revenue falls by the tax.
- On top: taxable value = ₹50,000; GST = ₹9,000; customer pays ₹9,000 more.
Whatever the commercial outcome, the tax itself is owed to the government on the supplies made from the effective date of registration. The revised invoice simply records which way you settled it. Registered buyers usually accept the "on top" route because they can claim the GST as credit; unregistered customers rarely do, which is why the consolidated, inclusive approach is common for them.
What if the business is an e-invoice taxpayer?
A business that has just registered rarely crosses the e-invoice threshold (aggregate turnover above ₹5 crore in any financial year from 2017-18), so this is uncommon. If it does apply, for example after a business transfer, check with your adviser how the revised documents should be reported to the IRP. The general rules are in what is e-invoicing.
A second worked example: the consolidated option in practice
Suppose a Pune caterer's registration was made effective from 1 June 2026, but the certificate arrived on 20 July 2026. In that gap it billed 40 walk-in customers, none registered, all in Maharashtra, totalling ₹2,36,000 including GST at 18%.
- Taxable value = 2,36,000 ÷ 1.18 = ₹2,00,000
- CGST 9% = ₹18,000; SGST 9% = ₹18,000
Because every customer is unregistered, Rule 53(2) lets the caterer issue one consolidated revised tax invoice for all of them, marked "Revised Invoice", instead of 40 separate documents. If it had also served unregistered customers in Goa, the second proviso allows a separate consolidated revised invoice for each state, but only for inter-state supplies of up to ₹2,50,000 each.
Registered customers are different: each registered buyer gets its own revised invoice quoting the original bill number and date, so it can claim credit.
Common mistakes
- Calling a corrected bill a "revised invoice" when it should be a credit or debit note.
- Missing the one-month window after the certificate date.
- No reference to the original bill number and date.
- Not printing "Revised Invoice" prominently.
- Consolidating registered customers into one document; each registered buyer needs its own.
- Ignoring inter-state rules, such as the ₹2,50,000 per-supply limit for state-wise consolidation of unregistered inter-state supplies.
- Using the regular invoice series, which muddles numbering in the first return.
Key takeaways
- Under GST, "revised invoice" means only the Section 31(3)(a) case: sales between the effective date of registration and the certificate date.
- Issue within one month of the certificate date.
- Rule 53(1) requires the words "Revised Invoice" and the original document's number and date.
- Unregistered customers can be consolidated; registered buyers need individual documents.
- For ordinary corrections, use credit notes, debit notes or GSTR-1 amendments.
This guide is general information, not tax advice. Rules last checked on 20 October 2026; confirm with your tax professional for your situation.