Indirect Tax Laws · Value of Supply
Transaction Value and Inclusions under Section 15
Updated 5 October 2026 · Fact-checked
Value of supply under Section 15 is the transaction value: the price actually paid or payable, when the supplier and recipient are unrelated and price is the sole consideration. To solve, start with the price, add non-GST taxes, incidental expenses, interest, late fee and linked subsidies, and leave out GST and eligible discounts.
Understand Transaction Value and Inclusions under Section 15
GST is charged on the value of supply. Section 15 of the CGST Act tells you how to find that value. The default rule is simple: the value is the transaction value. This is the price actually paid or payable for the supply.
Transaction value is accepted when two conditions are met. First, the supplier and the recipient must not be related. Second, the price must be the sole consideration. If either condition fails, you cannot simply take the invoice price. You move to the valuation rules framed under the Act (Rule 28 of the CGST Rules for related persons). Where the parties are related, the invoice value may still be accepted if the relationship has not influenced the price.
The invoice price is often not the full value. Section 15(2) says certain items must be added if they are not already in the price. These are: taxes, duties, cesses, fees and charges levied under other laws (not under GST or the GST Compensation Cess law) if charged separately by the supplier; amounts the supplier was liable to pay but the recipient paid; incidental expenses such as commission and packing charged by the supplier; interest, late fee or penalty for delayed payment; and subsidies directly linked to the price.
Two points need care. GST itself (CGST, SGST, UTGST, IGST) is never part of the value. And a subsidy given by the Central or State Government is not added. A subsidy from any other source, if directly linked to price, is added to the value of the supplier who receives it.
Discounts are the reverse of inclusions. Section 15(3) allows certain discounts to be excluded. You study these in detail under the exclusions topic, but in a problem you must apply both sides together. Follow one order: first deduct the eligible discounts from the price, then add the Section 15(2) inclusions to the net price.
Key rules to remember
- Transaction value (Section 15(1))
- Value of supply = price actually paid or payable
- Accepted when supplier and recipient are not related and price is the sole consideration.
- Value with inclusions (Section 15(2))
- Value = Price + non-GST taxes/duties/fees charged separately + supplier's liabilities paid by recipient + incidental expenses + interest/late fee/penalty for delayed payment + linked subsidies (non-Government)
- Add an item only if it is not already part of the price. Do not add it twice.
- Items never included
- Exclude: CGST, SGST/UTGST, IGST, GST Compensation Cess; Central/State Government subsidies; eligible discounts under Section 15(3)
- GST is excluded because tax is computed on the value, not as part of it.
- Related person test
- Persons are related if, as the Explanation to Section 15 provides: they are officers or directors of one another's businesses; they are legally recognised partners in business; they are employer and employee; any person directly or indirectly owns, controls or holds 25% or more of the outstanding voting stock or shares of both of them; one directly or indirectly controls the other; both are directly or indirectly controlled by a third person; together they directly or indirectly control a third person; or they are members of the same family. Persons who are the sole agent, sole distributor or sole concessionaire, howsoever described, of the other person are related only where they are treated as related for the purposes of the Act.
- If the parties are related, or price is not the sole consideration, the value is found under the valuation rules (Rule 28 for related persons). The invoice value may be accepted if the relationship has not influenced the price.
- Discount condition (Section 15(3))
- Discount before or at the time of supply: excluded if recorded in the invoice. Post-supply discount: excluded only if agreed before or at the time of supply, linked to specific invoices, and recipient reverses ITC proportionately
- Deduct the eligible discount from the price first. Then add the Section 15(2) inclusions to the net price.
How to solve Transaction Value and Inclusions under Section 15 questions
Use the same order in every Section 15 question. It stops you from missing an item or adding one twice.
- 1Check the two conditions: are the parties unrelated, and is price the sole consideration? If not, say Section 15(1) does not apply directly and use the valuation rules. For related parties, the invoice value may be accepted if the relationship has not influenced the price.
- 2Write down the base price from the invoice or contract.
- 3Deduct discounts only if they meet the Section 15(3) conditions. Ignore discounts that fail the conditions.
- 4List every other charge in the facts. Test each against Section 15(2): non-GST levy, supplier's liability paid by recipient, incidental expenses, interest or late fee, linked subsidy.
- 5Add only those items not already in the price. Leave out GST and Government subsidies.
- 6Total the figures to get the value of supply. Then compute GST on this value at the stated rate.
- 7Write the answer in provision, facts and conclusion form, citing Section 15 and naming each item you added or excluded.
Quickest way: Add-and-strip checklist
When to use it: Use this for MCQs and for short numerical parts when the facts list many small charges.
- Start with the price in the invoice.
- Strike out anything that is GST or a Government subsidy.
- Tick each remaining charge as an inclusion if it is a supplier's charge, a non-GST levy, a supplier's liability, a delayed-payment charge or a linked subsidy.
- Subtract a discount only if it is on the invoice, or backed by a prior agreement with ITC reversal.
- Add the ticked items to the net price and stop. GST is computed last, on this total.
Common mistakes in Transaction Value and Inclusions under Section 15
Including GST in the value of supply.
Students see 'total invoice amount' and use it without separating the tax.
Fix: Always find the pre-GST figure first. CGST, SGST, UTGST and IGST are never part of the value.
Adding a subsidy received from the Central or State Government.
Students remember 'subsidies are included' and forget the exception.
Fix: Add a subsidy only if it is directly linked to the price and is not from the Central or State Government.
Excluding interest or late fee because it is charged later.
Students think the value is fixed at the time of supply.
Fix: Interest, late fee and penalty for delayed payment of consideration are part of the value under Section 15(2).
Adding an expense that is already in the price.
Students add every charge they see without checking whether the price already covers it.
Fix: Add an item only if it is charged over and above the price, or paid by the recipient separately.
Using transaction value for related parties without checking.
Students skip the conditions and go straight to calculation.
Fix: Test the relationship and the sole-consideration condition in the first line of your answer.
Deducting every discount shown in the facts.
Students treat all discounts alike.
Fix: A post-supply discount is excluded only if the agreement came earlier, it is linked to invoices, and the recipient reverses ITC.
Worked examples
Example 1
Alpha Ltd sells machinery to Beta Ltd, an unrelated buyer, on invoice price of ₹2,00,000 less ₹10,000 trade discount shown on the invoice. Alpha also charges separately: packing ₹5,000, freight ₹8,000 for delivery arranged by Alpha, a state levy outside GST ₹4,000, and interest ₹3,000 for delayed payment. GST is 18%, shown separately. Find the value of supply and GST.
Show the solution
- Conditions: parties are unrelated and price is the sole consideration, so transaction value applies under Section 15(1).
- Net price after discount recorded on the invoice at the time of supply: ₹2,00,000 − ₹10,000 = ₹1,90,000.
- Add packing ₹5,000. It is an incidental expense charged by the supplier under Section 15(2).
- Add freight ₹8,000. Alpha charges it for delivery that Alpha arranges. Freight charged by the supplier is an incidental expense under Section 15(2)(c), which covers commission, packing and any other amount charged by the supplier in respect of the supply. It is added to the value.
- Add the state levy of ₹4,000. It is a tax under another law, charged separately by the supplier.
- Add interest of ₹3,000 for delayed payment.
- Value of supply = ₹1,90,000 + ₹5,000 + ₹8,000 + ₹4,000 + ₹3,000 = ₹2,10,000.
- GST at 18% on ₹2,10,000 = ₹37,800.
Answer: Value of supply is ₹2,10,000 and GST is ₹37,800.
Example 2
Gamma Ltd sells 1,000 units at ₹800 per unit to an unrelated customer. A private trust gives Gamma a subsidy of ₹100 per unit, directly linked to the price. A State Government gives a separate subsidy of ₹50 per unit. The customer also pays ₹15,000 directly to an insurer for transit insurance that Gamma was liable to arrange, not included in the price. Find the value of supply.
Show the solution
- Conditions: parties are unrelated and price is the sole consideration, so Section 15(1) applies.
- Price received from the customer: 1,000 × ₹800 = ₹8,00,000.
- Private trust subsidy directly linked to price is added: 1,000 × ₹100 = ₹1,00,000.
- State Government subsidy of ₹50 per unit (₹50,000 in all) is excluded by Section 15(2).
- The transit insurance was Gamma's liability, paid by the customer and not in the price. Add ₹15,000.
- Value of supply = ₹8,00,000 + ₹1,00,000 + ₹15,000 = ₹9,15,000.
Answer: Value of supply is ₹9,15,000. The State Government subsidy is not included.
Exam tips
- Open every answer with the two conditions for transaction value. Examiners give marks for the provision before the working.
- Make a short two-column list in the margin: 'added' and 'not added'. Write the reason beside each item.
- Watch the words 'charged separately' and 'not included in price'. They tell you whether to add the item.
- In MCQs, check the source of a subsidy first. Government subsidy means no addition.
- Compute GST last, on the final value. Show it as a separate line.
Practice questions from Value of Supply
- Mehta Appliances sells a new washing machine to a customer for Rs 30,000 cash along with the exchange of the customer's old machine. The sam…
- Mehta Appliances, Ahmedabad, supplies a new refrigerator to a customer for Rs 28,000 in cash plus the exchange of the customer's old refrige…
- Ganga Appliances sells a washing machine to a customer for Rs 22,000 in cash plus the exchange of the customer's old machine. The same washi…
- Sunrise Textiles Pvt Ltd, Surat, sells fabric to Kiran Garments for Rs 2,00,000 under an invoice. Sunrise separately charges Rs 6,000 for pa…
- Gupta Electronics sold goods to Sharma Retail for Rs 1,00,000. The invoice recorded a trade discount of Rs 5,000 reducing the price from Rs …
Transaction Value and Inclusions under Section 15 in other exams
The same ground in other exams, if you are preparing for more than one or want another angle on it.
Transaction Value and Inclusions under Section 15: frequently asked questions
What is transaction value under Section 15 of the CGST Act?
It is the price actually paid or payable for a supply of goods or services or both. It is accepted when the supplier and recipient are not related and price is the sole consideration.
Is GST included in the value of supply?
No. The value of supply excludes CGST, SGST, UTGST and IGST. You compute GST on the value, so adding it to the value would be circular.
Is interest on late payment part of value of supply?
Yes. Interest, late fee or penalty for delayed payment of any consideration for the supply is added to the value under Section 15(2).
What happens if the supplier and recipient are related?
Section 15(1) does not apply directly. The value is determined under the valuation rules (Rule 28 of the CGST Rules). The invoice value may be accepted if the relationship has not influenced the price.
Are all subsidies added to the value of supply?
No. Only subsidies directly linked to the price of the supply are added, and subsidies given by the Central or State Government are excluded.