# Composite vs Mixed Supply: Questions to Resolve Before Billing

A composite supply and a mixed supply have different GST tests and can produce different tax outcomes. Under the CGST Act, composite supply involves naturally bundled supplies made together in the ordinary course, with one principal supply. Mixed supply concerns supplies made together for a single price that do not constitute a composite supply. Before billing a package, document the commercial facts instead of treating every “combo” as the same kind of transaction.

## Ask what the customer principally buys

Read the offer and contract as the customer would. Identify the central goods or service and why the other elements accompany it. Are those elements ordinarily needed to provide the main supply, or have unrelated products simply been grouped for promotion? Value can be relevant evidence, but the largest priced component is not automatically the principal supply.

Describe the package without tax language first. For example, “deliver a machine safely to the buyer's site with ordinary packing and transport” is a factual description. “Composite supply at the machine rate” is already a conclusion. Keeping the facts separate makes the conclusion easier to review.

## Examine whether the bundle is natural

Look at normal business practice, customer expectation, contractual obligations and how the components function together. The Act's illustration of goods supplied with packing, transport and insurance shows a familiar composite-supply pattern. It should not be expanded into a rule that every item added to a goods sale necessarily follows the goods.

Ask whether the customer can meaningfully decline the additional element and whether the supplier sells it independently. Those facts help the analysis but should not be used as an isolated mechanical test. A naturally bundled arrangement can still show separate amounts commercially; invoice formatting alone does not determine the legal character.

## Check the single-price condition for mixed supply

A promotional package of independently useful products sold for one price may raise a mixed-supply question. Confirm whether the supplies can be made independently and whether the package is not composite. A single amount is relevant to the statutory mixed-supply definition, but it does not turn a naturally bundled composite supply into a mixed supply.

Keep promotional terms, price lists and component descriptions. If sales staff advertise “free accessory,” determine whether the customer actually purchases multiple items for one combined consideration. CBIC Circular 92/11/2019 explains that buy-one-get-one arrangements need a composite-or-mixed analysis rather than an assumption that one item is always an independent free supply.

## Compare illustrative outcomes carefully

Assume a qualifying composite supply has taxable value of ₹50,000 and a principal supply with a confirmed aggregate rate of 18%. Section 8 treats the composite supply according to the principal supply, so illustrative tax would be ₹9,000. The conclusion depends on the bundle actually meeting the definition.

For a different hypothetical package confirmed as a mixed supply, assume independently supplied components would attract 5%, 12% and 18%. Section 8 applies the highest applicable rate to that mixed supply. On a single taxable price of ₹10,000, tax would be ₹1,800. These are arithmetic illustrations, not classifications of a named product package or statements that those rates remain applicable to particular goods.

## Do not manufacture independence through invoice lines

Separate descriptions and prices can communicate useful detail, but they cannot rewrite an indivisible commercial obligation. A project contract may require the supplier to deliver an operational result even if the invoice lists equipment, installation and testing separately. Review what was agreed and actually supplied.

The reverse shortcut also fails: placing unrelated goods on one line does not make them naturally bundled. If the customer purchases separate items independently with separate prices, consider whether they are simply separate supplies. Do not force every multi-item invoice into either composite or mixed supply merely because the items appear on one document.

## Identify provisions that require a different route

Works contracts involving immovable property have a specific statutory definition and service treatment. Other specified activities may also require analysis beyond the ordinary package question. Before selecting the principal-supply rate, confirm that a specific provision does not govern the arrangement.

For installation projects, obtain drawings, site details, ownership-transfer terms and the nature of attachment. For subscription packages, identify licence, access, support and goods elements. The question is not just which component has the highest price, but how the law treats the transaction that the customer contracts to receive.

## Write a short bundle decision record

| Question | Evidence to preserve |
|---|---|
| What is the commercial objective? | Contract and offer wording |
| Are the supplies naturally bundled? | Ordinary practice and functional relationship |
| Is there a principal supply? | Reasoned description of the central supply |
| Is one price charged? | Price schedule and promotional terms |
| Does a specific provision apply? | Relevant classification and legal reference |

Record the selected treatment, rate references and assumptions. The note should explain why rejected alternatives did not fit the facts.

## Recheck when the offer changes

A previously reviewed bundle can change when an optional component becomes mandatory, new goods are added or the price structure changes. Review the new offer before reusing the old billing setup. Test the resulting invoice to ensure that the approved taxable value and rate appear consistently.

The strongest pre-billing decision starts with the arrangement's commercial substance and ends with a documented statutory analysis. Clear records allow the sales team to present the offer accurately and the accounts team to apply a supportable rate, without relying on a package name or a convenient invoice layout.

## Sources and references

- [CBIC CGST Act: relevant definitions and sections 8, 14, 15, 31 and 34](https://cbic-gst.gov.in/hindi/CGST-bill-e.html)
- [CBIC CGST Rules: invoice, voucher, valuation and record provisions](https://cbic-gst.gov.in/pdf/01062021-CGST-Rules-2017-Part-A-Rules.pdf)
- [CBIC Circular 92/11/2019-GST: sales promotion schemes](https://gstcouncil.gov.in/sites/default/files/2024-06/circular-cgst-92.pdf)