Indirect Tax Laws and Practice · Supply under GST

Composite and Mixed Supply under GST Explained

Updated 11 October 2026 · Fact-checked

A composite supply is a bundle of supplies naturally sold together, one of which is the principal supply; the whole bundle is taxed as the principal supply. A mixed supply is a bundle not naturally linked; it is taxed at the highest-rate supply in it. Both rules come from section 8 of the CGST Act.

Understand Composite and Mixed Supply

Businesses often sell more than one item in a single transaction. GST needs one rate for that transaction, so section 8 of the CGST Act sets the rule. You do not tax each item separately. You first classify the bundle, then apply one rule.

A composite supply is a bundle of two or more taxable supplies that are naturally bundled in the ordinary course of business, and one of them is the principal supply. The principal supply is the main one, the supply that is the predominant element of the bundle. The other items are ancillary to it. Example: a Mumbai-based builder sells a flat with a parking slot and a club membership. The flat is the principal supply.

A mixed supply is a bundle of two or more individual supplies made together for a single price, where the items are not naturally bundled and are not dependent on each other. Example: a Diwali gift box from a Delhi trader with chocolates, dry fruits, a steel bottle and a candle for one price.

Section 8 gives the rule. A composite supply is treated as a supply of the principal supply. A mixed supply is treated as a supply of that particular supply that attracts the highest rate of tax. So the rate in a composite supply follows the main item, even if an ancillary item has a higher rate. In a mixed supply the rate follows the highest-rated item.

The test is always about the ordinary course of business and the buyer's expectation. Ask: would a normal buyer expect these items to come together? If yes, lean towards composite. If the items are only packed together for convenience or marketing, it is mixed. The definitions are in section 2 of the CGST Act; this page states them in plain words, and section 8 is quoted from the Act.

Key rules to remember

Composite supply rule: Composite supply → taxed as the principal supply (rate and treatment of the principal supply); Section 8(a). The bundle must have two or more supplies, one of which is the principal supply.
Mixed supply rule: Mixed supply → taxed as the supply attracting the highest rate of tax; Section 8(b). Compare the rates of all items in the bundle and pick the highest.
Tax on mixed supply: Tax = Total value of the bundle × highest rate among its items; The whole single-price value is taxed at that rate, not item by item.
Tax on composite supply: Tax = Total value of the bundle × rate of the principal supply; Ancillary items do not change the rate, even if their own rate is higher or lower.

How to solve Composite and Mixed Supply questions

Use the same order for every question. Classify first, then pick the rate.

1List every item in the bundle and note the single price charged.
2Ask whether the items are naturally bundled in the ordinary course of business, and whether one is the main item.
3If yes, it is a composite supply. Identify the principal supply, the one that is the predominant element.
4If the items are not naturally bundled and are only sold together for one price, it is a mixed supply.
5For composite supply, take the GST rate of the principal supply (section 8(a)).
6For mixed supply, list the rate of each item and take the highest (section 8(b)).
7Apply that rate to the whole value and compute CGST, SGST or IGST as the question asks.
8Write the section 8 reference and give a one-line reason for your classification.

Quickest way: Natural bundle test

When to use it: Use in MCQs and short case questions where you must classify and name the rate fast.

Check the words 'naturally bundled' and 'ordinary course of business' in the facts.
If you can name one main item, answer composite and use its rate.
If items could easily be sold alone and are packed only for a single price, answer mixed.
For mixed, scan the rates and pick the largest.
Check that the options are not tempting you to average the rates or add them up.

Common mistakes in Composite and Mixed Supply

Taxing each item in the bundle at its own rate.
Students are used to item-wise rates and forget that section 8 gives one rate for the whole bundle.
Fix: Once you classify the supply as composite or mixed, apply a single rate to the entire value.
Using the highest rate for a composite supply.
The highest-rate rule is learnt for mixed supply and wrongly carried over.
Fix: For composite supply use the principal supply's rate, even if an ancillary item has a higher rate.
Treating a packed bundle as composite just because it has one price.
A single price looks like a sign of composite supply.
Fix: One price is common to both. The test is natural bundling in the ordinary course of business.
Failing to name the principal supply.
Students jump to the rate without stating which item is the main one.
Fix: Name the principal supply and say why it is the predominant element. Marks are given for the reasoning.
Averaging the rates of the items in a mixed supply.
Averaging feels fair, but the Act does not provide for it.
Fix: Section 8(b) says the supply attracting the highest rate. Pick the largest, do not average.

Worked examples

Example 1

Sharma Traders, Jaipur, sells a gift hamper for ₹2,000 containing sweets (GST rate 5%), a ceramic mug (12%) and a scented candle (18%). The items are not naturally bundled and are sold together for one price. Find the nature of supply and the GST payable.

Show the solution

The items are packed together for a single price but are not naturally bundled. So it is a mixed supply.
Under section 8(b), a mixed supply is treated as the supply attracting the highest rate of tax.
The rates are 5%, 12% and 18%. The highest is 18%.
GST = ₹2,000 × 18% = ₹360.
If the supply is intra-State, this splits as CGST ₹180 and SGST ₹180.

Answer: Mixed supply; taxed at 18%; total GST ₹360 (CGST ₹180 + SGST ₹180 for an intra-State supply).

Example 2

Kaveri Builders, Chennai, sells a flat with a covered parking space for a total of ₹50,00,000. Assume the flat is taxable at 5% and the parking space, if supplied alone, would be taxable at 18%. The parking is naturally bundled with the flat. Find the nature of supply, the rate and the GST.

Show the solution

Parking with a flat is naturally bundled in the ordinary course of business. So it is a composite supply.
The flat is the principal supply. The parking space is ancillary.
Under section 8(a), the composite supply is treated as a supply of the principal supply.
So the rate is 5%, the rate of the flat. The 18% rate of parking is ignored.
GST = ₹50,00,000 × 5% = ₹2,50,000.

Answer: Composite supply; principal supply is the flat; taxed at 5%; GST ₹2,50,000.

Exam tips

Always start your answer with the classification: composite or mixed. Then cite section 8.
In case scenarios, quote the facts that show natural bundling or the lack of it.
Name the principal supply in composite cases. It earns marks.
For mixed supply MCQs, write down every rate and circle the highest before choosing an option.
Do not confuse these with a single supply of independent items billed separately; two separate invoices for independent supplies are not covered by section 8.

Practice questions from Supply under GST

Composite 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 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 not naturally bundled and are sold together for a single price. A composite supply takes the principal supply's rate. A mixed supply takes the highest rate.

What does section 8 of the CGST Act say?

Section 8 fixes the tax liability on composite and mixed supplies. A composite supply with a principal supply is treated as a supply of that principal supply. A mixed supply is treated as the particular supply that attracts the highest rate of tax.

What is a principal supply in GST?

It is the main supply in a composite supply, the one that is the predominant element of the bundle. The other supplies are ancillary to it. The whole bundle is taxed as this supply.

Can the rate of an ancillary item change the tax on a composite supply?

No. A composite supply is treated as the principal supply, so its rate applies to the whole bundle. The ancillary item's own rate is not used.