Section 7, CGST Act, 2017 – Sale of business assets is a supply if made in the course or furtherance of business.
Schedule I, Para 1 – Supplies between related/distinct persons without consideration (not relevant here but confirms that assets of business are taxable when supplied).
Section 22 & 24, CGST Act – Once registered, all taxable outward supplies must comply with GST levy.
Section 18(6), CGST Act – Applies when ITC is availed; requires reversal or tax on transaction value, whichever is higher. If no ITC was availed, this section does not impose any special adjustment, but GST on outward supply still applies.
Circular No. 44/18/2018-GST dated 02.05.2018 – ITC on goods held in stock/capital goods at the time of registration is optional and must be taken within the time limits of Section 18(1)(a).
Short Practical Answer
Yes — your client must charge GST on the sale of the machine once he is a registered person.
There is no exemption merely because (i) the machine was purchased before registration, or (ii) ITC was never claimed.
The transaction is a taxable supply of business assets by a registered person.
However, Section 18(6) does not apply because ITC was never taken—so GST is charged only on the transaction value, without any special reversal calculation.