Skip to content

CS Professional · Goods and Services Tax (GST) and Corporate Tax Planning

Supply under GST: CS Professional Study Guide

Supply under GST is the taxable event. Section 7 says what counts as supply, Section 9 levies the tax, Sections 12 and 15 fix when the liability arises and on what value. To solve a question, test the transaction against Section 7, check Schedules I, II and III, then apply levy, time and value in that order.

What this chapter covers

This chapter covers the base of the GST law. It starts with the meaning and scope of supply under Section 7. It then moves to the three Schedules, composite and mixed supply, the levy under Section 9, the composition scheme, time of supply and value of supply.

Every later chapter in the paper depends on it. Input tax credit, place of supply, invoicing, returns and refunds all assume you can say whether a transaction is a supply, who pays the tax, when the liability arises and on what value. If the answer here is wrong, the rest of your solution is wrong too.

The GST and Corporate Tax Planning paper is written and case-based. Expect facts about a company, a firm or a society, and a question such as whether a transaction is a supply, when tax is payable, or what the taxable value is. You must give the provision, apply it to the facts and state a conclusion.

The GST part of Paper 7.2 carries 70 marks, and almost every case in it begins with a supply question. Section 7, Section 12 and Section 15 are short and precise, so examiners can frame facts around their exact words and conditions. You get marks for naming the right provision, applying each condition to the facts and reaching a clear conclusion. Students who learn this chapter well also find the later chapters easier, because the same logic keeps returning.

Supply under GST: topics in the order to study them

  1. 1Meaning and Scope of Supply under Section 7Start here because every other topic assumes you know what a supply is and what its essential elements are.
  2. 2Schedule I, II and III: Deemed Supply, Goods or Services, NeitherThese Schedules change the Section 7 result, so read them straight after the section.
  3. 3Composite and Mixed SupplyIt applies the goods-or-services logic to bundled supplies, and it decides the rate that applies.
  4. 4Levy and Collection of Tax under Section 9Once you know what a supply is, learn who pays tax on it, including reverse charge and e-commerce operators.
  5. 5Composition LevyIt is an alternative way of paying tax, so it is best learnt after the normal levy.
  6. 6Time of Supply of Goods under Section 12This section fixes when liability arises, and it gives you the pattern of earlier-of rules.
  7. 7Time of Supply of Services and Change in Rate of TaxStudy it after goods so you can compare the rules, and then handle rate changes.
  8. 8Value of Taxable Supply under Section 15Value comes last because you compute tax only after you know the supply, the person liable and the time.

How to prepare Supply under GST

This chapter rewards close reading of short sections and steady practice on facts. Prepare it in this way.

  1. Read Sections 7, 9, 12 and 15 from the Act itself. Mark every condition, such as consideration, course or furtherance of business, and the word earlier or earliest.
  2. Make a one-page chart of Schedules I, II and III with an example for each entry. Learn which Schedule overrides which result.
  3. For each section, write a three-line answer: provision, test, conclusion. Practise stating all three in that order.
  4. Solve time of supply cases on a timeline. Mark the invoice date, the due date for invoice, the payment date and the receipt date, and then pick the right one.
  5. Solve valuation cases line by line. List what is included under Section 15(2), what is excluded under Section 15(3), and check whether the parties are related.
  6. Write full answers to two or three past-style case questions in 3 hours of timed practice across the paper. Compare your answers with the Act wording.
  7. Revise the chapter with a short list of conditions and exceptions a few days before the exam.

Common mistakes in Supply under GST

  • Treating every transaction without consideration as not a supply.

    Fix: Always check Schedule I when the facts say gift, free of cost or between related persons.

  • Applying the time of supply rule without checking the earlier-of condition.

    Fix: Draw a timeline, list each date and choose the earlier one for goods, as Section 12(2) requires.

  • Forgetting that supply is limited to the extent covered by the invoice or the payment.

    Fix: Apply Explanation 1 to Section 12(2): the time of supply arises only to the extent of the invoice or payment.

  • Including or excluding items in value without reading Section 15(2) and (3).

    Fix: Go through the clauses one by one and tick each amount in the facts against them.

  • Confusing Schedule III with exemption.

    Fix: Remember that Schedule III items are not a supply at all, while exemption applies to a supply that is otherwise taxable.

  • Writing only a conclusion without the provision and the analysis.

    Fix: Practise a fixed format: provision, application to the facts, conclusion, even if each part is only a line or two.

Last-day revision: Supply under GST

  • Supply includes sale, transfer, barter, exchange, licence, rental, lease or disposal for consideration in the course or furtherance of business.
  • Import of services for consideration is a supply even if it is not in the course or furtherance of business.
  • Schedule I activities are supplies even without consideration.
  • Schedule III activities and notified government activities are neither supply of goods nor supply of services.
  • Section 7(1A) says activities that are supplies are treated as goods or services as per Schedule II.
  • Section 9 levies CGST on intra-State supplies, at rates not exceeding 20%, on the value determined under Section 15.
  • Reverse charge under Section 9(3) and 9(4) makes the recipient liable, as if the recipient were the supplier.
  • Time of supply of goods is the earlier of the invoice date (or last date to issue it) and the date of payment.
  • Under reverse charge for goods, time of supply is the earliest of receipt, payment, or the day after 30 days from the supplier's invoice.
  • Value is the transaction value when the parties are not related and price is the sole consideration.
  • Discount is excluded only if the conditions in Section 15(3) are met; for post-supply discount the input tax credit must be reversed.
  • Related persons include those holding 25% or more of voting stock in both, and sole agents or distributors.

Supply under GST practice questions

Supply under GST in other exams

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

Supply under GST: frequently asked questions

What is the most important section in the Supply under GST chapter?

Section 7 is the base, because it decides whether a transaction is a supply at all. Sections 12 and 15 are also frequent in case-based questions. Learn all of them with their conditions.

Is Section 7 enough to decide if something is a supply?

No. You must also check Schedule I, which adds supplies without consideration, and Schedule III and notified government activities, which are not supplies. Section 7(1A) and Schedule II then decide whether it is goods or services.

How do I answer a time of supply question in the exam?

State the rule that applies, such as Section 12(2) for goods. List the dates in the facts, pick the earlier or earliest as the rule requires, and conclude. Check whether reverse charge applies, because the rule changes.

Do I need to memorise the whole of Section 15?

You should know it well, especially the inclusions in Section 15(2), the conditions for excluding discounts in Section 15(3) and the list of related persons. These are often tested through facts.

Is this chapter useful for other parts of the paper?

Yes. Input tax credit, invoicing, returns and place of supply all depend on knowing what a supply is, when it happens and what its value is.