What does section 13 regulate?

It regulates time of supply of services. Read the exact text, conditions, exceptions and transaction date together.

Which subordinate law should be checked?

No direct CGST Rule has been certified in this phase. Notifications, circulars, forms and the corresponding SGST/UTGST layer may also apply.

What evidence should be retained?

Preserve the contract or transaction record, invoice or form, portal acknowledgement, payment/ledger evidence, correspondence, legal working and the official source version used.

Can portal behaviour override the statute?

No. Portal functionality is operational evidence; legal entitlement and liability remain controlled by the Act, Rules, notifications and binding decisions.

Section 13 - Time of supply of services

Chapter IV - Time and Value of Supply

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Source control: The text/status on this page is tied to the official source gateway and the Phase 1 legal-review register. Open official source.

Finin2min Summary - Section in 2 Minutes

Fixes the tax point for services based on timely invoice, provision, receipt of payment and RCM backstops. Timely invoice: earlier of invoice or payment. Late invoice: earlier of service provision or payment. Service RCM: payment, 60-day backstop, or recipient invoice where recipient must issue it. Associated-enterprise import has a special books/payment trigger. Voucher sub-section omitted from 1 October 2025.

Exact operative text

13. Time of supply of services.-(1) The liability to pay tax on services shall arise at the time of supply, as determined in accordance with the provisions of this section. (2) The time of supply of services shall be the earliest of the following dates, namely:- (a) the date of issue of invoice by the supplier, if the invoice is issued within the period prescribed under section 31 or the date of receipt of payment, whichever is earlier; or (b) the date of provision of service, if the invoice is not issued within the period prescribed under section 31 or the date of receipt of payment, whichever is earlier; or (c) the date on which the recipient shows the receipt of services in his books of account, in a case where the provisions of clause (a) or clause (b) do not apply: Provided that where the supplier of taxable service 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 relating to such excess amount. Explanation.-For the purposes of clauses (a) and (b)- (i) the 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; (ii) “the date of receipt of payment” shall be the date on which the payment is entered in the books of account of the supplier 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 earlier of the following dates, namely:- (a) 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 (b) the date immediately following sixty days from the date of issue of invoice or any other document, by whatever name called, in lieu thereof by the supplier, in cases where invoice is required to be issued by the supplier; or (c) the date of issue of invoice by the recipient, in cases where invoice is to be issued by the recipient: 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: Provided further that in case of supply by associated enterprises, where the supplier of service is located outside India, the time of supply shall be the date of entry in the books of account of the recipient of supply or the date of payment, whichever is earlier. * * * * (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.

Paragraph-wise decode

Section-Rule-Form-Notification bridge

No direct Rule certified in Phase 1. Check notifications, circulars, forms and corresponding State law.

The mapping is a legal concordance, not a round-robin related-link list. It is limited to instruments certified in this phase.

Practical example

A service invoice is issued within time on 10 August and payment arrives on 25 August. Time of supply is 10 August. PROFESSIONAL ALERT First determine whether invoice was issued within the section 31/rule 47 period.

Section 14 CLEAN OPERATIVE BARE TEXT 14. Change in rate of tax in respect of supply of goods or services.-Notwithstanding anything contained in section 12 or section 13, the time of supply, where there is a change in the rate of tax in respect of goods or services or both, shall be determined in the following manner, namely:-

(a) in case the goods or services or both have been supplied before the change in rate of tax,-

(i) where the invoice for the same has been issued and the payment is also received after the change in rate of tax, the time of supply shall be the date of receipt of payment or the date of issue of invoice, whichever is earlier; or

(ii) where the invoice has been issued prior to the change in rate of tax but payment is received after the change in rate of tax, the time of supply shall be the date of issue of invoice; or

(iii) where the payment has been received before the change in rate of tax, but the invoice for the same is issued after the change in rate of tax, the time of supply shall be the date of receipt of payment;

(b) in case the goods or services or both have been supplied after the change in rate of tax,-

(i) where the payment is received after the change in rate of tax but the invoice has been issued prior to the change in rate of tax, the time of supply shall be the date of receipt of payment; or

(ii) where the invoice has been issued and payment is received before the change in rate of tax, the time of supply shall be the date of receipt of payment or date of issue of invoice, whichever is earlier; or

(iii) where the invoice has been issued after the change in rate of tax but the payment is received before the change in rate of tax, the time of supply shall be the date of issue of invoice:

Provided that the date of receipt of payment shall be the date of credit in the bank account if such credit in the bank account is after four working days from the date of change in the rate of tax.

Explanation.-For the purposes of this section, “the date of receipt of payment” shall be the date on which the payment is entered in the books of account of the supplier or the date on which the payment is credited to his bank account, whichever is earlier. SIMPLE DECODE Overrides sections 12 and 13 when the tax rate changes and aligns supply, invoice and payment around the change date. Classify whether supply occurred before or after the rate change. Then apply the six statutory invoice/ payment combinations. Bank-credit date overrides books date where credit is more than four working days after the rate change. PRACTICAL EXAMPLE Service completed before a rate increase; invoice issued before change but payment received after change. Time of supply is the invoice date, so the old rate applies. PROFESSIONAL ALERT Use documentary evidence for actual supply completion; invoice timing alone does not establish supply date.

Professional alert

Confirm the transaction-date amendment and commencement position before reliance.

Implementation checklist

Fix the transaction, taxable period and jurisdiction.
Read every subsection, proviso, explanation and omission marker.
Open the mapped Rule, form, notification and circular.
Test State/UT variation and portal version.
Preserve evidence, approvals, working papers and acknowledgements.
Record the conclusion, assumptions, source date and reviewer.

Evidence and retention checklist

Contract, purchase order, invoice or underlying transaction document.
Registration, return, ledger, challan and portal acknowledgement.
Official Act/Rule/notification version used and effective date.
Internal tax position paper, computation and management approval.
Correspondence, notices, replies, orders and appeal papers where applicable.

Practical Q&A

What does section 13 regulate?: It regulates time of supply of services. Read the exact text, conditions, exceptions and transaction date together.
Which subordinate law should be checked?: No direct CGST Rule has been certified in this phase. Notifications, circulars, forms and the corresponding SGST/UTGST layer may also apply.
What evidence should be retained?: Preserve the contract or transaction record, invoice or form, portal acknowledgement, payment/ledger evidence, correspondence, legal working and the official source version used.
Can portal behaviour override the statute?: No. Portal functionality is operational evidence; legal entitlement and liability remain controlled by the Act, Rules, notifications and binding decisions.

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