From 1st April 2025, obtaining ISD registration has been made mandatory for Head Offices that are recipients of common input services meant for multiple distinct persons (i.e., separate GSTIN registrations). This is a significant compliance shift. Prior to this amendment, a taxable person had the option to either raise cross-charge invoices to beneficiary GSTINs or use the ISD mechanism. That option has now been eliminated for entities engaged in e-commerce operations through multiple registrations.
The underlying rationale is that Section 20 read with Rule 39 makes it clear: where common input services benefit multiple registered persons (distinct persons under GST), the credit must flow through ISD. The HO cannot unilaterally retain ITC on common expenses when those expenses relate to business carried out under different GSTINs.
On the timing requirement under Rule 39(1) - while the rule mandates monthly distribution, various High Court rulings have held that the time prescription is directory, not mandatory. The substantive obligation is to distribute credit to the correct beneficiary registrations; a delay in distribution does not extinguish the right of the recipient to claim such credit, provided it is eventually distributed.
In Amazon ECO operations, inventory is stored at Amazon's premises across states, and Amazon raises invoices under the respective state GSTINs based on dispatch location. This creates a multi-GSTIN structure within the same legal entity. For common services like advertisement, legal fees, and consultancy that benefit all state operations, ISD distribution is now obligatory. The distribution must be supported by ISD invoices (Form ISD-03) citing the original supplier invoice.
HO cannot retain the entire ITC on common input services. From 1st April 2025, mandatory ISD registration applies, and HO must distribute credit through ISD invoices to all beneficiary registrations. The monthly timing prescription under Rule 39(1) is directory, but the obligation to distribute is mandatory. Non-compliance may attract interest and penal consequences under Section 20 and Section 122 of the CGST Act.