Indirect Tax Laws · Time of Supply

Time of Supply for Vouchers, Residual and Interest Cases (Section 12 CGST)

Updated 5 October 2026 · Fact-checked

Under Section 12 of the CGST Act, the time of supply of goods fixes when GST liability arises. For vouchers, it is the issue date if the supply is identifiable then, otherwise the redemption date. For residual cases, it is the return due date or the tax payment date. For interest, late fee or penalty, it is the date the supplier receives it.

Understand Time of Supply for Vouchers, Residual and Interest Cases

Time of supply is the point at which GST liability on a supply of goods arises. Section 12 gives separate rules for different situations. The main rules cover forward charge and reverse charge. This page covers the three leftover situations: vouchers, residual cases, and extra amounts for late payment.

A voucher is an instrument that the holder can use to get goods or services. The law asks one question: is the supply identifiable when the voucher is issued? If you know the goods, the supplier and the tax treatment at issue, it behaves like a single-purpose voucher, and tax arises on the date of issue. If the holder can pick goods later, or use it with different suppliers, it behaves like a multi-purpose voucher, and tax arises on the date of redemption. You do not have to memorise labels. Test identifiability.

The residual rule is a fallback. It applies only when the time of supply cannot be fixed under the forward charge, reverse charge or voucher rules. If the supplier has to file a periodical return, the time of supply is the date on which that return is to be filed, meaning its due date. In any other case, it is the date on which the tax is paid.

The additional consideration rule covers interest, late fee or penalty charged for delayed payment of consideration. For the part of the value that relates to this addition, the time of supply is the date on which the supplier receives it. So the principal supply and the interest can have two different times of supply.

The common thread is that each rule needs a trigger you can find in the facts: an issue date, a redemption date, a return due date, a payment date or a receipt date. Find the trigger and the date follows.

Key rules to remember

Voucher: supply identifiable at issue: Time of supply = date of issue of voucher; Applies where the supply to which the voucher relates is identifiable at that point (single-purpose type).
Voucher: supply not identifiable at issue: Time of supply = date of redemption of voucher; Applies in all other cases (multi-purpose type). Unredeemed vouchers do not trigger tax on this rule.
Residual: periodical return applies: Time of supply = date on which the return is to be filed; Use the due date, not the actual filing date. Applies only if time cannot be fixed under the forward charge, reverse charge or voucher rules.
Residual: no periodical return: Time of supply = date on which the tax is paid; This is the last-resort rule.
Interest, late fee or penalty for delayed payment: Time of supply of the addition = date on which the supplier receives it; It applies only to the addition in value. The original supply keeps its own time of supply.

How to solve Time of Supply for Vouchers, Residual and Interest Cases questions

Use this order for any Section 12 case on vouchers, residual cases or late-payment additions.

1Identify what is being taxed: a voucher, a normal supply of goods, or an extra amount such as interest, late fee or penalty.
2If there is an extra amount, split the facts. Fix the time of supply of the principal goods separately from the addition.
3For a voucher, ask whether the goods and the tax treatment are identifiable on the issue date. Then pick the issue date or the redemption date.
4For a normal supply, first try the forward charge or reverse charge rules. Move to the residual rule only if the facts show the time cannot be fixed that way.
5Under the residual rule, check whether a periodical return applies. If it does, use its due date. If not, use the date the tax is paid.
6For interest, late fee or penalty, use the date the supplier actually receives that amount, not the date it became due or was charged.
7State your answer in provision-facts-conclusion form, with the date and the reason for choosing that rule.

Quickest way: Trigger-word method

When to use it: Use it in MCQs and short case scenarios where you have about two minutes.

Scan the facts for the key word: voucher, interest, late fee, penalty, or the phrase 'cannot be determined'.
Voucher: ask 'Can I name the goods at issue?' Yes means issue date. No means redemption date.
Interest, late fee or penalty: pick the date the supplier received it.
Cannot be determined: pick the return due date if a periodical return applies, otherwise the tax payment date.
Check that you have not applied one date to both the principal supply and the addition.

Common mistakes in Time of Supply for Vouchers, Residual and Interest Cases

Taxing every voucher on the date of issue.
Students remember 'voucher = issue date' and ignore the identifiability condition.
Fix: Always test whether the supply is identifiable at issue. If not, the redemption date applies.
Using the actual date of filing the return under the residual rule.
The words 'date on which return is filed' sound like the actual filing date.
Fix: The rule refers to the date on which the return is to be filed. Use the due date, even if the supplier files earlier or later.
Applying the residual rule as the first rule.
It looks simple and the facts often mention a return.
Fix: It is a fallback. Use it only when the time cannot be determined under the forward charge, reverse charge or voucher rules.
Treating the interest on late payment as part of the original supply's time of supply.
Students see one invoice and one transaction and assume one date.
Fix: The addition has its own time of supply, which is the date the supplier receives it. Keep the principal and the addition separate.
Using the due date or the date of charging the interest as the time of supply.
Students confuse accrual with receipt.
Fix: For interest, late fee or penalty, only receipt by the supplier matters.
Taxing the receipt of money for a voucher when the supply is not identifiable at issue.
Students link receipt of money with tax liability.
Fix: Where the supply is not identifiable at issue, the time of supply is the redemption date. Do not tax the sale or receipt of money for the voucher at issue.

Worked examples

Example 1

Case: On 12 January, Zenith Stores Ltd issues gift cards worth ₹5,000 each. Card A is redeemable only for one named pair of branded shoes at Zenith's own store. Card B is redeemable for any goods across all Zenith outlets. Card A is redeemed on 20 March. Card B is redeemed on 25 May. State the time of supply of goods for each card under Section 12.

Show the solution

Provision: for vouchers, the time of supply is the date of issue if the supply is identifiable at that point. In all other cases it is the date of redemption.
Card A: the goods (the named shoes), the supplier and the supply are known on issue. The supply is identifiable at issue.
So the time of supply for Card A is the date of issue, 12 January. Redemption on 20 March does not change this.
Card B: the holder can choose any goods at any outlet. The supply is not identifiable on 12 January.
So the time of supply for Card B is the date of redemption, 25 May.

Answer: Card A: 12 January (date of issue). Card B: 25 May (date of redemption).

Example 2

Case: Arora Traders supplied goods to Bhatia Ltd and issued the invoice on 5 April for ₹1,00,000, with payment due in 30 days. Bhatia paid late. On 15 June, Arora received ₹1,00,000 principal and ₹2,000 as interest for the delay. Separately, Arora made another supply of goods in April. It is not a voucher or a reverse charge supply, and the case states that the forward charge rules give no date that fixes its time of supply. Arora must file a periodical return covering that April supply, and the facts state that this return is due on 20 May. Arora paid the tax for that April supply on 28 May. State the time of supply of (a) the interest and (b) the other April supply.

Show the solution

(a) Provision: the time of supply for an addition in value by way of interest, late fee or penalty for delayed payment of consideration is the date on which the supplier receives it.
Arora received the ₹2,000 interest on 15 June. The interest is a separate addition. Its time of supply is not tied to the invoice date of 5 April.
So the time of supply of the interest is 15 June.
(b) Provision: the residual rule applies only when the time cannot be fixed under the forward charge, reverse charge or voucher rules. Here the supply is not a voucher or reverse charge supply, and the case says the forward charge rules do not fix the time. So the residual rule applies.
Under the residual rule, if a periodical return has to be filed, the time of supply is the date on which that return is to be filed.
Arora has to file a periodical return covering the April supply, and the facts give its due date as 20 May. We use the date given in the facts and do not assume a standard due date. So the return rule applies.
The actual payment date of 28 May does not matter. The payment-date rule applies only when no periodical return has to be filed. The time of supply is 20 May.

Answer: (a) Interest: 15 June, the date Arora receives it. (b) April supply: 20 May, the due date of the periodical return as given in the facts.

Exam tips

Write the rule in one line, then the fact that triggers it, then the date. Examiners reward this provision-facts-conclusion flow.
In voucher questions, check for words like 'specific goods' or 'any goods at any outlet'. They tell you whether the supply is identifiable.
Always give two separate dates when a question mentions both a principal supply and interest or a late fee.
In MCQs, watch for options built from the invoice date, actual filing date or due date of interest. Pick only the date the rule names.
Do not use the residual rule unless the question states or implies that the time cannot be determined under the other rules.

Practice questions from Time of Supply

Time of Supply for Vouchers, Residual and Interest Cases in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Time of Supply for Vouchers, Residual and Interest Cases: frequently asked questions

What is the difference between the time of supply of single-purpose and multi-purpose vouchers?

If the supply is identifiable at the point of issue, the time of supply is the date of issue. If it is not identifiable, the time of supply is the date of redemption. The test is identifiability, not the name of the voucher.

When does the residual rule for goods apply?

It applies only when the time of supply cannot be fixed under the forward charge, reverse charge or voucher rules. If a periodical return has to be filed, the due date of the return is the time of supply. Otherwise it is the date on which the tax is paid.

What is the time of supply for interest or late fee on delayed payment under GST?

For goods, it is the date on which the supplier receives the interest, late fee or penalty. This applies to the addition in value only. The original supply keeps its own time of supply.

Is the residual date the actual filing date of the return?

No. The rule refers to the date on which the return is to be filed, which is the due date. Early or late filing does not change the time of supply.