Direct and Indirect Taxation · Concept of Supply including Composite and Mixed Supplies

Composite Supply and Mixed Supply under GST Section 8

Updated 10 October 2026 · Fact-checked

A composite supply is a bundle of supplies naturally sold together, where one is the principal supply; the whole bundle is taxed as that principal supply. A mixed supply is a bundle sold together for a single price that is not naturally bundled; it is taxed at the highest rate among its items. Section 8 CGST Act states both rules.

Understand Composite Supply and Mixed Supply

A taxpayer often sells more than one item in one deal. GST must then decide which rate applies to the whole deal. Section 8 of the CGST Act, 2017 answers this. It deals with the tax liability on a composite or a mixed supply.

A composite supply has two or more supplies that go together in the ordinary course of business, and one of them is the principal supply. The principal supply is the main one; the others are incidental to it. Under Section 8(a), a composite supply comprising two or more supplies, one of which is a principal supply, is treated as a supply of that principal supply. So the whole bill is taxed at the rate of the principal supply.

A mixed supply has two or more individual supplies made together for a single price, but they are not naturally bundled and no one item is the principal supply. Under Section 8(b), a mixed supply is treated as a supply of that particular supply which attracts the highest rate of tax. The whole price is taxed at that highest rate.

The test is simple. Ask: would a normal buyer expect these items to come together? If yes, and one item is the main one, it is composite. If the items are just packed together for one price, it is mixed. Section 8 gives the tax rule. The detailed definitions of the two terms are in Section 2 of the CGST Act, and you should learn them in the same words as your study material.

The rule matters because it removes the need to split the price. You do not apportion the value among items. You pick one rate and apply it on the entire value.

Key rules to remember

Composite supply rule: Tax on composite supply = Total value × rate of the principal supply; Section 8(a). The whole bundle is treated as a supply of the principal supply. Do not split the value.
Mixed supply rule: Tax on mixed supply = Total value × highest rate among the items; Section 8(b). The supply that attracts the highest rate of tax decides the rate for the whole bundle.
Test to classify: Naturally bundled with a principal supply → composite; otherwise bundled for a single price → mixed; Classify first, then apply the rule. Wrong classification gives a wrong rate.

How to solve Composite Supply and Mixed Supply questions

Use this method for any question asking the GST rate, value or tax on a bundle of supplies.

1List every individual supply in the deal and its GST rate if given.
2Check whether the supplies are made together for a single price. If they are charged separately and independently, they are separate supplies, not composite or mixed.
3Ask whether the items are naturally bundled in the ordinary course of business. If yes, it is a composite supply.
4For a composite supply, identify the principal supply, meaning the main item whose supply is the real purpose of the deal.
5Apply Section 8(a): tax the whole value at the rate of the principal supply.
6If the items are not naturally bundled, treat it as a mixed supply and apply Section 8(b): pick the highest rate among the items.
7Compute tax as total value × the chosen rate, then split into CGST and SGST or IGST as the question needs.
8Write the section number and a one-line reason for your classification.

Quickest way: Bundle check in three questions

When to use it: Use it in MCQs and short numerical questions where you must name the type of supply or the rate quickly.

Is there one clearly main item and the rest only help it? If yes, composite: use the main item's rate.
If there is no main item and the items are just packed together for one price, mixed: scan the rates and take the highest.
Apply the chosen rate to the full value. Never average the rates and never split the price.

Common mistakes in Composite Supply and Mixed Supply

Taxing each item of a composite supply at its own rate
Students split the bill by habit, as they do for separate supplies.
Fix: Under Section 8(a) the whole composite supply is taxed as the principal supply. Use one rate on the full value.
Using the lowest or average rate for a mixed supply
Students think the rule favours the taxpayer or try to balance the rates.
Fix: Section 8(b) says the supply that attracts the highest rate of tax. Always pick the highest.
Calling any gift hamper or combo a composite supply
Students see items sold together and assume they are naturally bundled.
Fix: Check natural bundling and a principal supply. A packed set of unrelated items for one price is usually a mixed supply.
Choosing the principal supply by the highest value or highest rate
Students mix the two rules.
Fix: The principal supply is the main purpose of the deal, not necessarily the costliest or the highest-rated item. The highest rate rule applies only to mixed supplies.
Applying Section 8 to items billed separately
Students see two items on one invoice and assume a bundle.
Fix: Section 8 applies when supplies are made together for a single price. Independent supplies at separate prices are taxed each on its own.

Worked examples

Example 1

Sharma Electronics sells a refrigerator to a customer for ₹40,000 and includes transport to the customer's home in the same price. Assume the refrigerator attracts GST at 18% and the transport service, if taken alone, would attract 5%. Find the GST on the supply and name the type of supply.

Show the solution

The goods and the delivery are made together for a single price of ₹40,000.
Delivery of a refrigerator naturally goes with its sale, so the supplies are naturally bundled. This is a composite supply.
The principal supply is the sale of the refrigerator. Transport is incidental to it.
Under Section 8(a), the whole supply is treated as a supply of the principal supply, taxed at 18%.
GST = ₹40,000 × 18% = ₹7,200.

Answer: It is a composite supply with the refrigerator as the principal supply. GST is ₹7,200 at 18% on ₹40,000.

Example 2

Gupta Traders sells a festival gift pack for a single price of ₹2,000. The pack has sweets, a candle and a ceramic lamp. Assume rates of 5% on sweets, 12% on the candle and 18% on the lamp. The items are not naturally bundled and none is the principal supply. Find the GST on the pack.

Show the solution

The items are supplied together for a single price of ₹2,000.
They are not naturally bundled and there is no principal supply, so this is a mixed supply.
Under Section 8(b), a mixed supply is treated as the supply that attracts the highest rate of tax.
The rates are 5%, 12% and 18%. The highest is 18%.
GST = ₹2,000 × 18% = ₹360.

Answer: It is a mixed supply taxed at the highest rate of 18%. GST is ₹360.

Exam tips

Write the classification first and the section reference next. Examiners give marks for naming Section 8(a) or 8(b) correctly.
In numericals, show one rate and one multiplication on the full value. Do not split the value among items.
For MCQs, look for the words in the question: a main item with incidental services points to composite; a pack of unrelated items for one price points to mixed.
When a question gives the rates of all items, the trap is usually in choosing the rate. Decide the type before you pick the rate.
State the rule in the exact words of Section 8 in theory answers: principal supply for composite, highest rate for mixed.

Practice questions from Concept of Supply including Composite and Mixed Supplies

Composite Supply and Mixed Supply in other exams

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

Composite Supply and Mixed Supply: frequently asked questions

What is the difference between composite supply and mixed supply?

In a composite supply the items are naturally bundled and one is the principal supply. In a mixed supply the items are sold together for a single price but are not naturally bundled. A composite supply takes the principal supply's rate. A mixed supply takes the highest rate.

What does principal supply mean in GST?

It is the main supply in a composite supply, the one that is the real purpose of the deal. The other supplies are incidental to it. Section 8(a) treats the whole bundle as a supply of this principal supply.

How is tax on a mixed supply decided?

Section 8(b) treats a mixed supply as a supply of that particular supply which attracts the highest rate of tax. You apply that highest rate to the whole value of the bundle.

Do I have to split the price among the items?

No. Under Section 8 the whole bundle is taxed at one rate, either the principal supply's rate or the highest rate. You apply that rate on the total value.