Section‑8 of CGST Act 2017 defines the procedure of Taxability of composite and mixed Supply:
The tax liability on a composite or a mixed supply shall be determined in the following manner, namely:—
- a composite supply comprising two or more supplies, one of which is a principal supply, shall be treated as a supply of such principal supply; and
- a mixed supply comprising two or more supplies shall be treated as a supply of that particular supply which attracts the highest rate of tax.