This article explains Section 12 of the CGST Act, which governs the Time of Supply for goods under GST. We discuss key provisions such as the invoice date, payment date, reverse charge mechanism, and how businesses should ensure compliance with GST rules.
Understanding Time of Supply of Goods under GST: Section 12 CGST Act Explained
Introduction:
Section 12 of the Central Goods and Services Tax (CGST) Act, 2017 is crucial for determining the time of supply for goods. The time of supply is the moment at which the liability to pay GST arises. This section provides detailed provisions on when the tax should be paid on the supply of goods, ensuring that businesses and taxpayers have clear guidelines on their GST obligations. In this article, we’ll explore the key aspects of Section 12, which outlines the time of supply for goods and how it impacts businesses in terms of tax liability and payment.

What is the Time of Supply under GST?
The time of Supply refers to the point in time when the goods or services are considered to have been supplied, which triggers the liability to pay tax. According to Section 12(1) of the CGST Act, the time of supply of goods shall arise when the following conditions are met:
The date of issue of the invoice by the supplier.
The date of receipt of payment by the supplier.
The liability for tax is determined by whichever of these two events happens first.
Invoice Date vs Payment Date
Section 12(2) outlines the key provisions for determining the time of supply of goods, which occurs at the earlier of the following:
Invoice Date: The time of supply is the date on which the supplier issues the invoice, or the latest date by which the supplier is required to issue the invoice in accordance with Section 31.This is particularly relevant in cases where the supplier is required to issue invoices in a timely manner under GST laws.
Payment Date: If the payment is received before the invoice is issued, the time of supply is the date on which the supplier receives the payment.This includes both payments made through cheque, cash, or electronic means.
There is an important exception in the provision for cases where the supplier receives an excess payment of up to ₹1,000 over the invoice amount. In such cases, the time of supply for the excess amount is at the supplier’s discretion, and they may choose to treat the date of invoice for the excess payment as the time of supply.
Explanation 1
This explanation clarifies that the supply is considered to have been made to the extent that it is covered by the invoice or the payment received.
Explanation 2
This explanation specifies that, for the payment date, the time of supply is determined by the date on which the payment is recorded in the books of accounts or credited to the supplier’s bank account, whichever occurs first.
Reverse Charge Mechanism and Time of Supply
The provisions for the reverse charge mechanism (RCM) under Section 12(3) apply when the recipient, rather than the supplier, is liable to pay the tax. In this case, the time of supply is the earliest of the following dates:
Date of Receipt of Goods: If the goods are received by the recipient, that date is considered the time of supply.
Payment Date: If the payment is made by the recipient before receiving the goods, the time of supply is the date when the payment is recorded in the recipient's books or debited from their bank account, whichever is earlier.
30 Days After Invoice: If the time of supply cannot be determined based on the above two criteria, it will be deemed to be the date immediately following 30 days from the date of the invoice or any similar document issued by the supplier.
If it is not possible to determine the time of supply based on the above options, the time of supply will be recorded as the date of entry in the recipient’s books of accounts.
Time of Supply for Vouchers
Section 12(4) deals with the supply of vouchers, which are often used in businesses as a form of pre-paid value. The time of supply for vouchers is determined as follows:
Identifiable Voucher Supply: If the supply of the voucher is identifiable at the time of issue, the time of supply is the date of issue of the voucher.
Non-Identifiable Voucher Supply: In cases where the supply is not identifiable at the time of issue (for instance, in cases of gift vouchers or open-loop vouchers), the time of supply will be the date of redemption of the voucher.
This distinction ensures that businesses handling vouchers properly account for the tax liability either at the time of issuance or redemption, depending on the nature of the voucher.
Other Situations and Special Cases
Section 12(5) addresses situations where it is not possible to determine the time of supply under the previous sub-sections. In these cases, the following rules apply:
Periodical Returns: If a business is required to file periodical returns, the time of supply is the date on which the return is due to be filed.
Payment of Tax: In any other scenario, where the time of supply cannot be determined by any other means, it will be deemed to be the date on which the tax is paid by the supplier.
Special Cases: Late Fees and Penalties
Section 12(6) deals with the addition in value of the supply, specifically for situations where interest, late fees, or penalties are charged for delayed payments. In such cases, the time of supply will be the date on which the supplier receives the additional value, which is the payment of interest, late fees, or penalties.
Conclusion
Section 12 of the CGST Act plays a crucial role in determining the time of supply for goods, a key element in understanding when GST is payable. By providing clear guidelines on the earliest of invoice or payment dates, and dealing with specific cases such as reverse charge transactions and vouchers, the section helps businesses determine when they must account for GST.
For standard transactions, the time of supply is either the invoice date or the payment date, whichever occurs first.
In case of reverse charge transactions, the time of supply is determined based on receipt of goods, payment date, or 30 days after the invoice date.
Vouchers and special cases like late fees or penalties are also covered under specific provisions.
For businesses, understanding these rules is vital for correct GST compliance, ensuring they pay taxes at the right time and avoid penalties related to late payment or incorrect tax filings. As a result, businesses should carefully track the time of supply for every transaction to align with the GST requirements efficiently.