Section 12 of The Central Goods and Services Tax Act, 2017
Original Text
12. Time of supply of goods.
(1) The liability to pay tax on goods shall arise at the time of supply, as determined in accordance with the provisions of this section.
(2) The time of supply of goods shall be the earlier of the following dates, namely:—
(a) the date of issue of invoice by the supplier or the last date on which he is required, under section 31, to issue the invoice with respect to the supply; or
(b) the date on which the supplier receives the payment with respect to the supply:
Provided that where the supplier of taxable goods receives an amount up to one thousand rupees in excess of the amount indicated in the tax invoice, the time of supply to the extent of such excess amount shall, at the option of the said supplier, be the date of issue of invoice in respect of such excess amount.
Explanation 1.––For the purposes of clauses (a) and (b), “supply” shall be deemed to have been made to the extent it is covered by the invoice or, as the case may be, the payment.
Explanation 2.––For the purposes of clause (b), “the date on which the supplier receives the payment” shall be the date on which the payment is entered in his books of account or the date on which the payment is credited to his bank account, whichever is earlier.
(3) In case of supplies in respect of which tax is paid or liable to be paid on reverse charge basis, the time of supply shall be the earliest of the following dates, namely:—
(a) the date of the receipt of goods; or
(b) the date of payment as entered in the books of account of the recipient or the date on which the payment is debited in his bank account, whichever is earlier; or
(c) the date immediately following thirty days from the date of issue of invoice or any other document, by whatever name called, in lieu thereof by the supplier:
Provided that where it is not possible to determine the time of supply under clause (a) or clause (b) or clause (c), the time of supply shall be the date of entry in the books of account of the recipient of supply.
(4) In case of supply of vouchers by a supplier, the time of supply shall be—
(a) the date of issue of voucher, if the supply is identifiable at that point; or
(b) the date of redemption of voucher, in all other cases.
(5) Where it is not possible to determine the time of supply under the provisions of sub-section (2) or sub-section (3) or sub-section (4), the time of supply shall––
(a) in a case where a periodical return has to be filed, be the date on which such return is to be filed; or
(b) in any other case, be the date on which the tax is paid.
(6) The time of supply to the extent it relates to an addition in the value of supply by way of interest, late fee or penalty for delayed payment of any consideration shall be the date on which the supplier receives such addition in value.
Visual Summary
Forward Charge
General Rule: Date of Invoice OR Last date to issue invoice.
Note: Advances for goods are exempt from GST at the time of receipt (Notification 66/2017).
Reverse Charge (RCM)
Earliest of:
1. Receipt of Goods
2. Date of Payment
3. 31st day from Invoice
Vouchers
Status: Section 12(4) Omitted w.e.f. Oct 1, 2025.
Vouchers are now treated as actionable claims/money; tax arises only upon redemption (supply of underlying goods).
Summary
Section 12 of the CGST Act defines the “Time of Supply” for goods. This is the specific point in time when a transaction is considered legally complete for tax purposes, triggering the liability to pay GST. It answers the question: “When is the tax due?”
- For Normal Sales (Forward Charge): While the Act originally stated tax is due on the earlier of invoice or payment, a crucial notification (No. 66/2017) changed this. Currently, for goods, GST is paid based on the Invoice Date (or the due date for the invoice). Advances received for goods are generally not taxed at the time of receipt.
- For Reverse Charge (RCM): If the buyer is liable to pay tax, the time of supply is the earliest of receiving goods, making payment, or 30 days after the invoice date.
- For Late Fees/Interest: If a supplier charges interest for delayed payment, tax on that interest is due only when the interest is actually received.
In-Depth Analysis
1. Forward Charge Mechanism (Section 12(2)):
The statutory provision sets the time of supply as the earlier of the Invoice Date or the Payment Date. However, to ease liquidity for businesses, the Government issued Notification No. 66/2017-Central Tax. This notification exempts registered persons (excluding Composition Dealers) from paying GST on advances received for goods. Consequently, the time of supply is effectively the Date of Issue of Invoice or the last date by which the invoice should have been issued under Section 31.
2. Reverse Charge Mechanism (Section 12(3)):
Under RCM, the recipient pays the tax. The government ensures tax is collected promptly by setting the time of supply to the earliest of three events. A critical nuance here is the “31st day” rule. If a supplier issues an invoice on Oct 1st, but the goods are received later and payment is made later, the recipient becomes liable for tax on Nov 1st (31 days later), regardless of the other factors. This prevents deferment of tax in RCM scenarios.
3. The Shift in Vouchers (Section 12(4)):
Historically, Section 12(4) taxed vouchers at issuance if the supply was identifiable. However, following judicial rulings classifying vouchers as “actionable claims” (which are not goods/services), the Finance Act 2025 omitted this subsection effective October 1, 2025. This aligns the law with the principle that a voucher is merely a means of payment, and tax should only arise when goods are actually redeemed.
4. Value Addition (Section 12(6)):
This subsection provides relief for suppliers charging interest or penalties for late payment. Instead of accruing tax liability when the interest becomes due, the liability arises only when the supplier actually receives the additional amount. This prevents suppliers from paying tax on income they might never collect.
Deep Research & Legal Precedents
The interpretation of Section 12 has been significantly shaped by judicial intervention and subsequent legislative amendments.
The Court held that vouchers are ‘actionable claims’ and not goods or services. They are instruments of payment. Consequently, GST cannot be levied at the time of issuance of the voucher. This judgment rendered Section 12(4) practically inoperative for many business models, leading to its omission in 2025.
Legislative Amendment (Finance Act, 2025):
Recognizing the legal position established by the High Courts, the Finance Act 2025 omitted Section 12(4) w.e.f. October 1, 2025. This confirms that the time of supply for vouchers is the time of redemption (when the actual supply takes place), treating the voucher issuance as a transaction in money/actionable claim which is outside GST.
While focused on Ocean Freight, this judgment reinforced strict interpretation of the “recipient” and “time of supply” under RCM. It emphasized that liability cannot be artificially created where the statutory link is broken, indirectly influencing how Section 12(3) is applied in complex cross-border transactions.
Notification No. 66/2017-Central Tax:
This remains the cornerstone for Section 12(2). It decoupled the receipt of payment from the time of supply for goods, effectively neutralizing the “earlier of” clause regarding payments for the majority of taxpayers (excluding composition dealers).
Practical Examples
Example 1: Forward Charge (Impact of Notification 66/2017)
Scenario: ABC Ltd. receives an advance of ₹50,000 on Jan 5th for goods to be delivered in February. The invoice is issued on Feb 10th.
Analysis: Under the strict text of Section 12(2), the time of supply would be Jan 5th (payment). However, due to Notification 66/2017, no tax is paid on Jan 5th. The time of supply is Feb 10th (Invoice Date).
Example 2: Reverse Charge Mechanism (Section 12(3))
Scenario: An agriculturist supplies cashew nuts to a registered factory (RCM applies).
– Date of Invoice: Nov 1st
– Date Goods Received: Nov 25th
– Date of Payment: Dec 5th
Analysis: We compare:
1. Receipt of Goods: Nov 25th
2. Payment: Dec 5th
3. 31st day from Invoice: Dec 2nd
The earliest date is Nov 25th. The liability arises in the return for November.
Example 3: Delayed RCM Payment
Scenario: Same as above, but goods were received on Dec 10th and payment made Dec 15th.
Analysis:
1. Receipt: Dec 10th
2. Payment: Dec 15th
3. 31st day from Invoice (Nov 1st): Dec 2nd
The earliest date is Dec 2nd. The recipient must pay tax for the month of December (specifically by the 31st day rule), even though goods were received later.
Key Takeaways
- ✓ Invoice Rules: For goods, GST liability generally arises on the date of invoice issuance (or the last date it should have been issued).
- ✓ Advance Exemption: Advances received for goods are NOT taxable at the time of receipt (unlike services).
- ✓ RCM Trap: Under Reverse Charge, liability can trigger on the 31st day from the supplier’s invoice if goods or payment are delayed.
- ✓ Voucher Reform: Post-2025 amendment, vouchers are taxable only at redemption, treating them as actionable claims.
- ✓ Interest Income: GST on interest for late payment is on a “cash basis” (when received).
Process Flowchart
Practice Questions
Q1. Mr. A supplies goods to Mr. B. Invoice issued on 10th Jan. Payment received on 5th Jan. When is the time of supply?
Show Answer
10th Jan. Although Section 12(2) says “earlier of invoice or payment”, Notification 66/2017 exempts advances for goods. Thus, time of supply is the invoice date.
Q2. Under Reverse Charge (RCM), goods are received on 15th May, Invoice date is 1st May, and Payment is made on 20th May. What is the Time of Supply?
Show Answer
15th May. It is the earliest of: Receipt (15th May), Payment (20th May), or 31st day from invoice (1st June). Earliest is 15th May.
Q3. A supplier receives interest for delayed payment on 25th March. The original supply was in January. When is tax due on the interest?
Show Answer
25th March. Under Section 12(6), time of supply for interest/late fees is the date such addition in value is actually received.
Related Provisions
| Section | Description |
|---|---|
| Section 13 | Time of Supply of Services |
| Section 31 | Tax Invoice |
| Section 14 | Change in Rate of Tax |
Conclusion
Section 12 is the bedrock for determining when GST liability crystallizes for goods. While the statutory text suggests a dual trigger (invoice or payment), practical application is heavily modified by Notification 66/2017, making the invoice date the primary determinant for forward charge transactions. However, businesses must remain vigilant regarding Reverse Charge liabilities, where the “earliest of” rule still strictly applies, and the recent legislative changes regarding vouchers which have redefined the taxability of such instruments.