Input Service Distributor Registration for a Multi-State Group: Credit-Allocation Workflow
By Ravi Sisodia · Reviewed by CA Divyanshu Sengar · Updated 5 October 2026
2-minute summary
- ISD is a separate GST registration role used for receiving specified input-service invoices and distributing the related ITC to units with the same PAN.
- Credit exclusively attributable to one unit should go only to that unit; common credit requires the prescribed turnover/attribution mechanism.
- From 1 April 2025, the amended framework captures the mandatory ISD model for covered common input services.
- Finance should separately control ineligible credit and recipients that are not entitled to the underlying ITC.
Current position
Control and evidence map
| # | Control | What the file should show |
|---|---|---|
| 1 | Obtain/validate ISD registration for the office receiving common service invoices. | |
| 2 | Update vendor masters so covered invoices quote the correct ISD GSTIN where required. | |
| 3 | Create service-wise attribution and recipient master with State codes/GSTINs. | |
| 4 | Reconcile input documents, RCM transfers as applicable, ISD invoices and GSTR-6 before filing. | |
| 5 | Tie recipient-side ITC to distributed documents and investigate rejected/missing credits promptly. | |
Worked example
A Delhi head office receives an annual audit invoice covering operations of Delhi, Haryana and Maharashtra GSTINs. The finance team should identify the covered input service, book it in the ISD process, determine the correct recipient distribution basis and issue/disclose the ISD credit through the prescribed mechanism. A simple cost-allocation journal does not move GST credit.
Common mistakes
- Taking the common invoice in the normal HO GSTIN and leaving ITC stranded.
- Distributing ineligible credit as though it were fully available.
- Using management-accounting percentages without testing Rule 39 distribution requirements.
- Filing GSTR-6 without reconciling the recipient-side credit trail.
Frequently asked questions
Who needs ISD registration?
An office falling within the amended ISD definition that receives covered input-service invoices for or on behalf of distinct persons.
Can goods ITC be distributed through ISD?
ISD is focused on input services; goods/capital goods require their own supply/ITC treatment.
What return does an ISD file?
Form GSTR-6 under the prescribed GST framework.
What changed from April 2025?
The amended statutory framework made the ISD mechanism mandatory for the covered input-service distribution cases.
Official sources
- CBIC - Notification 16/2024-Central Tax - commencement of amended ISD provisions (2024-08-06)
- Central Board of Indirect Taxes and Customs - Central Goods and Services Tax Act, 2017 (current consolidated law)
- Central Board of Indirect Taxes and Customs - CGST Valuation Rules (current rules)
Disclaimer
Educational and professional reference only; confirm the current law, rates and the facts of your case before relying on this page.