Composite Supply vs Mixed Supply Under GST

When you sell two or more things together, GST needs a single answer to "what rate applies?" — and the CGST Act gives two, depending on the kind of bundle. A composite supply is a naturally bundled package with one principal supply, and the whole of it is taxed at the rate of that principal supply. A mixed supply is a combination of things that could just as well be sold separately, sold together for a single price, and the whole of it is taxed at the highest rate among its components. The difference is set out in section 8, and getting it wrong means either undercharging tax or quietly charging customers more than the law asks.

Why bundles need their own rule

Every supply under GST has to be classified — given an HSN code for goods or a SAC for services — and that classification decides the rate. A single product is easy. A bundle is not, because its parts may sit in different chapters of the tariff and attract different rates. A television sold with a wall-mount and installation, a hotel room with breakfast, a Diwali box with dry fruits and a bottle of juice: in each case someone has to decide whether the bundle is taxed as one thing or as several, and if one, as which.

Section 8 of the CGST Act answers that question, and it does so without asking you to apportion the price between components. That is the point of the rule. You do not work out what share of a room tariff is "really" breakfast. You decide what kind of bundle it is, and the rate follows from that. The September 2025 rate rationalisation narrowed most goods and services to 5% and 18%, which has reduced the stakes on some bundles — but it has not removed them, because a 5% item bundled with an 18% item still produces two very different answers depending on how the bundle is treated.

What the Act says: sections 2(30), 2(74) and 2(90)

Composite supply — section 2(30)

A composite supply is a supply made by a taxable person to a recipient consisting of two or more taxable supplies of goods or services or both, or any combination of them, which are naturally bundled and supplied in conjunction with each other in the ordinary course of business, one of which is a principal supply. The Act gives its own illustration: where goods are packed and transported with insurance, the supply of goods, packing materials, transport and insurance is a composite supply, and the supply of goods is the principal supply.

Principal supply — section 2(90)

The principal supply is the supply of goods or services that forms the predominant element of a composite supply, and to which every other supply in it is ancillary. Predominance is not a matter of which component costs more. It is a matter of what the customer is actually buying, with everything else there to make that purchase work.

Mixed supply — section 2(74)

A mixed supply is two or more individual supplies of goods or services, or any combination of them, made in conjunction with each other by a taxable person for a single price, where the supply does not constitute a composite supply. The Act's illustration is a package of canned foods, sweets, chocolates, cakes, dry fruits, aerated drinks and fruit juices sold for a single price — each item could be supplied on its own and none depends on the others.

Read the two definitions together and the structure is clear. Mixed supply is the residual category: a single-price bundle that fails the composite test. So the first question is always whether the bundle is composite; only if it is not, and it is sold for one price, do you reach mixed supply.

The naturally bundled test

"Naturally bundled" is not defined in the Act, which is why it produces most of the disputes. CBIC's early guidance and the way the phrase has been applied since point to a handful of indicators. None is decisive alone; you weigh them together.

• Trade practice. Is this combination normally supplied together by businesses in this line of trade? Hotels routinely include breakfast in room rates; confectioners do not routinely sell chocolates with a bottle of juice as a matter of course.
• Customer perception. Does the customer see one purchase or several? Someone buying a laptop with a carry bag thinks they bought a laptop.
• Dependence. Does one component exist to serve the other? Packing, transport and insurance exist to get the goods to the buyer; they have no purpose without them.
• Separate availability. Are the components commonly sold separately, and does the customer have a real choice to take one without the other?
• Pricing and presentation. Is there a single price, and is the offer advertised as one package? A single price does not make a bundle composite, but separate pricing points away from it.

Two conditions in the definition are easy to miss. First, section 2(30) speaks of two or more taxable supplies. Second, the bundling must be natural in the ordinary course of business — the business's own habit of packaging things together does not make a combination natural if the trade generally does not. A bundle engineered to drag a high-rated item down to a lower principal rate is exactly what the second condition is there to catch.

Section 8: how the rate is decided

Section 8 states the consequence of each category in one line apiece.

• 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.
• Section 8(b): a mixed supply comprising two or more supplies is treated as a supply of the particular supply that attracts the highest rate of tax.

The words "treated as a supply of" do more than set the rate. The whole bundle takes on the identity of the principal supply — or the highest-rated supply — for classification as well. A composite supply whose principal element is goods is generally treated as a supply of goods, which is why it is also read as following the goods rules on time of supply and place of supply. Where the principal element is a service, the service rules follow instead.

Worked examples

The examples below show the reasoning, not a rate lookup. Rates change by notification and depend on exact classification, so the percentages used are illustrations of how the rule works; check the current rate for your specific goods or services on CBIC before invoicing.

Goods with transport and insurance

A manufacturer sells machinery delivered to the buyer's site, with packing, freight and transit insurance included. This is the Act's own illustration of a composite supply. The machinery is the principal supply, so the freight and insurance take its classification and rate and form part of its taxable value — they do not go on the invoice under a transport or insurance SAC. The same logic is worked through for freight lines in our guide to HSN and SAC for transport and freight.

Hotel room with breakfast

A room tariff that includes breakfast is naturally bundled: hotels commonly sell it that way and guests expect it. Accommodation is the principal supply and the whole tariff is taxed as accommodation. A dinner ordered from the restaurant and billed separately is a different supply at its own rate. The SAC guide for hotel accommodation covers how the tariff itself affects the rate, and the restaurant GST rate guide covers the food side.

Gift hampers and Diwali boxes

A box of sweets, dry fruits, chocolates and a bottle of aerated drink sold for one price is the textbook mixed supply — it is almost word for word the illustration to section 2(74). None of the items is ancillary to the others, and each is routinely sold on its own. So the whole box is taxed at the rate of its highest-rated item. Suppose the sweets and dry fruits would individually attract 5% and the aerated drink attracts the 40% de-merit rate: the whole box goes out at 40%. Take the drink out and the answer changes completely, which is why the contents list of a corporate gifting catalogue is a tax decision as well as a merchandising one.

Laptop with a carry bag

A laptop sold with a carry bag in the same box, for one price, is a composite supply. The bag is there to carry the laptop; the customer is buying the laptop. The laptop is the principal supply and the bag takes its classification and rate — see the HSN code for computers and laptops. Contrast a shop running a promotion that pairs a laptop with an unrelated product the trade does not normally bundle with laptops, at one combined price: that looks much more like a mixed supply.

Annual maintenance contracts

An AMC is where the answer depends most on the contract. A comprehensive AMC that covers servicing and includes replacement parts for one fixed annual fee is usually analysed as a composite supply with the maintenance service as the principal supply, because the parts are consumed in delivering the service the customer is paying for. Where the contract covers labour only and parts are sold and billed separately as needed, the parts are separate supplies of goods at their own rate. Read the contract, not the name on it.

How to put a bundle on an invoice

The invoice has to follow the classification you have reached, and the rules in our guide to GST invoice format and rules apply as usual.

• Composite supply. Show the supply under the HSN or SAC of the principal supply and charge its rate on the full value, including the ancillary elements. You may list the components in the description for the customer's benefit, but they should not carry separate codes or rates.
• Mixed supply. Show the single price under the HSN or SAC of the highest-rated component, at that rate. Splitting the price across lines at lower rates while still selling only the package is the error section 8(b) exists to stop.
• Genuinely separate supplies. Where the customer can buy the items independently and each carries its own real price, invoice each on its own line with its own code and rate. That is not a mixed supply at all.

Whatever you choose flows into the HSN summary of GSTR-1 and, if you are in scope, the e-invoice. Decide the treatment for each standard bundle once, record the reasoning, and configure the billing system to apply it every time, rather than leaving it to whoever raises the invoice.

Common mistakes

• Treating every single-price bundle as mixed. A single price is a requirement of mixed supply, not evidence of it. Many single-price bundles are composite and take the lower principal rate.
• Treating every bundle as composite because it is convenient. Calling a hamper "composite" to apply the rate of its cheapest item fails the naturally bundled test and will not survive scrutiny.
• Choosing the principal supply by value. The principal supply is the predominant element the customer is buying, not the most expensive line. They usually coincide, but not always.
• Billing freight separately at a transport rate. When the seller of goods delivers them, freight is part of the composite supply of goods and takes the goods rate.
• Relying on another business's advance ruling. An advance ruling binds only the applicant and its jurisdictional officer. Rulings on bundles have been fact-specific; use them to understand the reasoning, not as authority for your own case.
• Not revisiting bundles after a rate change. When the rates of components move, the highest-rated item in a mixed supply — and so the rate on the whole bundle — can change with them.

A misclassified bundle is a rate error, and rate errors surface in scrutiny and audit as short payment with interest, typically through a show cause notice under section 73 or 74. Where your bundles are material to your turnover and the analysis is genuinely uncertain, an advance ruling or a written opinion from your tax adviser is cheaper than finding out later.

Frequently asked questions