Goods and Services Tax (GST) and Corporate Tax Planning · Time of Supply

Time of Supply for Vouchers, Residual Cases and Interest under GST

Updated 11 October 2026 · Fact-checked

Under Section 12, a voucher is supplied on its issue date if the supply is identifiable then, otherwise on redemption. If no earlier rule fixes the date, it is the periodical return due date, or else the date of tax payment. Interest, late fee or penalty is supplied when the supplier receives it.

Understand Time of Supply for Vouchers, Residual Cases and Interest

Section 12 first fixes the time of supply of goods under the forward charge (sub-section 2) and the reverse charge (sub-section 3). Sub-sections 4 to 6 cover three special situations. This topic is about those three.

The time of supply matters because liability to pay tax arises at that time. It decides the tax period in which you report the supply and which rate and rules apply.

Vouchers (sub-section 4). A voucher is an instrument that can be redeemed for goods or services. The law asks one question: is the supply identifiable when the voucher is issued? If yes, the time of supply is the date of issue. For example, a voucher that is valid only for one named product from one named supplier. If no, the time of supply is the date of redemption. For example, a general gift voucher usable for any goods in a store.

Residual cases (sub-section 5). Use this only when the time cannot be determined under sub-section 2, 3 or 4. Then the time of supply is the due date of the periodical return, where a periodical return has to be filed. In any other case it is the date on which the tax is paid. This is a fallback, not a first choice.

Interest, late fee or penalty (sub-section 6). If a buyer pays late and the supplier charges interest, late fee or penalty, that extra amount is part of the value of supply. Its time of supply is the date on which the supplier receives it. It does not follow the date of the original invoice.

Key rules to remember

Voucher: supply identifiable: Time of supply = date of issue of voucher; Applies if the supply is identifiable at the point of issue (Section 12(4)(a)).
Voucher: supply not identifiable: Time of supply = date of redemption of voucher; Applies in all other cases (Section 12(4)(b)).
Residual case with periodical return: Time of supply = date on which the return is to be filed; Only if the time cannot be found under sub-section 2, 3 or 4 (Section 12(5)(a)).
Residual case, any other: Time of supply = date on which tax is paid; Section 12(5)(b). Use when no periodical return has to be filed.
Interest, late fee, penalty: Time of supply = date on which supplier receives the addition in value; Applies to the extent of the addition for delayed payment of consideration (Section 12(6)).
Value link: Value of supply includes interest, late fee or penalty for delayed payment; Section 15(2)(d). Section 12(6) gives the timing of that same amount.

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

Use this order for any question on these three rules. Do not jump to the fallback rule until the main rules fail.

1Identify the item: a voucher, an unplaced date (residual case), or an addition like interest or late fee.
2If it is a voucher, ask whether the goods or services are identifiable on the issue date. Check the voucher terms in the facts.
3If identifiable, answer with the issue date. If not, answer with the redemption date.
4For other supplies, first test sub-section 2 (invoice or payment) and sub-section 3 (reverse charge). Say clearly that they fail on the facts.
5Only then apply sub-section 5: the return due date if a periodical return is to be filed, otherwise the date of tax payment.
6For interest, late fee or penalty, separate it from the main consideration. Fix its time as the date the supplier receives it.
7State the provision, the facts applied, the conclusion and the tax period in which the liability falls.

Quickest way: Three-question check

When to use it: Use in the exam when the problem is short and you need the answer fast.

Is it a voucher? Identifiable supply means issue date. Otherwise redemption date.
Is it interest, late fee or penalty? Date of receipt by the supplier.
Can the date not be found anywhere else? Return due date, or else date of tax payment.

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

Taking the redemption date for every voucher.
Students remember gift vouchers and generalise.
Fix: Test whether the supply is identifiable at issue. If yes, the issue date applies.
Using sub-section 5 as the first rule.
It looks simple, with a return date or payment date.
Fix: Apply it only when sub-section 2, 3 or 4 cannot fix the time. Say so in your answer.
Treating interest on late payment as supplied on the invoice date.
Students link all amounts to the original supply.
Fix: Under Section 12(6), the time is the date the supplier receives the interest, late fee or penalty.
Choosing the date interest is charged or accrued.
Accounting habit of accrual.
Fix: The statute says the date the supplier receives the addition in value. Use receipt.
Mixing up the residual rule choices.
Both are fallback dates and look similar.
Fix: Return due date if a periodical return has to be filed. Date of tax payment in any other case.

Worked examples

Example 1

Sunrise Retail Ltd, Pune, issued a gift voucher on 10 March for ₹5,000 usable against any goods in its stores. On 25 April the holder redeemed it for a jacket. Find the time of supply of goods.

Show the solution

The voucher can be used for any goods in the store, so the goods are not identifiable on 10 March.
Section 12(4)(a) does not apply. Section 12(4)(b) applies: the date of redemption.
The date of redemption is 25 April.

Answer: The time of supply is 25 April, the date of redemption.

Example 2

Kavya Traders sold goods to Ramesh Pvt Ltd for ₹2,00,000 and issued the invoice on time. Ramesh paid late. On 20 June, Kavya received ₹4,000 as interest for delayed payment, and it was credited to its bank on that date. State the time of supply for the interest.

Show the solution

Interest for delayed payment of consideration is an addition in value of supply under Section 15(2)(d).
Section 12(6) fixes its time of supply as the date on which the supplier receives it.
Kavya received ₹4,000 on 20 June. The invoice date for the main supply does not matter for this amount.

Answer: The time of supply of the ₹4,000 interest is 20 June, the date Kavya receives it.

Exam tips

Write the sub-section number with each conclusion. Examiners reward provision, application, conclusion.
For vouchers, quote the test: supply identifiable at the point of issue.
State why the main rules fail before using the residual rule.
Keep the interest amount separate from the main consideration and date it by receipt.
Check whether the question asks for goods (Section 12) or services (Section 13). The voucher and residual rules are worded the same in both, but do not mix sections.

Practice questions from Time of Supply

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

What is the time of supply of a voucher under Section 12?

If the supply is identifiable when the voucher is issued, it is the date of issue. In all other cases it is the date of redemption.

When does the residual rule in Section 12(5) apply?

It applies only when the time of supply cannot be determined under sub-section 2, 3 or 4. Then it is the return due date where a periodical return has to be filed, or else the date tax is paid.

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

It is the date on which the supplier receives that interest, late fee or penalty. It applies to the extent of the addition in value for delayed payment of consideration.

Does the IGST Act apply these same rules?

Yes. Section 20 of the IGST Act applies the CGST provisions on time and value of supply to integrated tax, with necessary changes.