CA India
Mari Selvam & AssociatesChartered Accountants
Last Updated: 20 Mar 25 10:46 AMInput Service Distributor (ISD)Mandatory ISD Compliance Under GST from April 1, 2025 – A Game Changer for BusinessesRimberio Park

Are you ready for a major GST shift coming into effect on April 1, 2025?

If your business receives common input service invoices at a central location and distributes Input Tax Credit (ITC) across multiple branches, ISD (Input Service Distributor) registration is now mandatory. Failing to comply can result in ITC mismatches, tax liabilities, and penalties.

This blog provides a clear, step-by-step breakdown of what businesses need to do before the deadline.


What is ISD & Why is It Now Mandatory?

An Input Service Distributor (ISD) is a GST-registered entity that receives input service invoices and distributes ITC to its branches based on their turnover.

Before April 1, 2025, businesses had the option to distribute ITC through multiple GST registrations. However, with Notification No. 16/2024-Central Tax, the government has made ISD registration compulsory to bring uniformity and transparency in ITC claims.


Key Changes Effective from April 1, 2025

ISD Registration is Now Mandatory – If your business receives invoices for shared services used across multiple GST-registered locations, you must register as an ISD.

Reverse Charge ITC (RCM) Can Now Be Distributed – Earlier, ISDs could not claim ITC on Reverse Charge Mechanism (RCM) transactions. From April 2025 onwards, ITC from RCM invoices can also be distributed among branches.

Strict Compliance – Avoid GST Notices & Penalties – Failure to distribute ITC correctly will result in GST notices, ITC mismatches, and financial liabilities.


Who will be impacted the most?

IT & Software Companies

Retail Chains & MNCs

Consulting Firms

Manufacturing Companies with Multiple Branches


How Does the ISD Rule Impact Businesses? (With Example)

Case Study: A National IT Company

Let’s take XYZ Ltd., headquartered in Bangalore, with branches in Mumbai, Chennai, and Delhi.

Scenario Before April 1, 2025

  1. The head office received a software subscription invoice of ₹10 lakh and claimed full ITC at its location.

  2. However, the software was used across multiple branches, creating ITC mismatches during audits.

Scenario After April 1, 2025


How to Distribute ITC Under the New ISD Rules?

3 Types of ITC Distribution

  1. Branch-Specific ITC → Directly allocated to the branch that used the service.

  2. Multi-Branch ITC → Shared among selected branches that used the service.

  3. Common ITC → Used by all branches, requiring proportionate distribution.

ITC Distribution Formula for ISD

To avoid GST mismatches, ITC must be allocated based on turnover ratio:

ITC to Branch = (Branch Turnover / Total Turnover) × Total ITC

📊 Example: A company incurs ₹1,00,000 ITC on a shared software license. The branch-wise turnover is:

This ensures accurate ITC allocation and compliance with GST law.


When ISD is Not Applicable – Key Exceptions

ITC on Inputs & Capital Goods

ITC for External Vendors

RCM ITC Before April 2025

From April 1, 2025, RCM ITC can be distributed to GST-registered branches.


What Happens if Businesses Fail to Comply?

GST mismatches leading to ITC rejection

Tax notices for wrongful ITC claims

Cash flow issues – Branches will have to pay tax instead of using eligible ITC


How to Register as an ISD & File Returns?

Step 1: ISD Registration

Apply via GST REG-01 and declare ISD status.

The GST portal will issue a unique ISD GSTIN.

This GSTIN should be used exclusively for ITC distribution

Step 2: Issuing an ISD Invoice

ISD must issue invoices to each branch for ITC distribution.

Separate ISD invoices are required for CGST, SGST, and IGST.

Step 3: Filing GSTR-6

GSTR-6 must be filed by the 13th of each month.

Late filing attracts a ₹50 per-day penalty.

ISD must match ITC in GSTR-6 with supplier invoices in GSTR-2B.


Financial Risks of Non-Compliance

Scenario

Without ISD Compliance

With ISD Compliance

ITC Claims

Branches cannot claim ITC

Proper allocation across branches

GST Notices

High risk due to ITC mismatches

No compliance risks

Tax Audits

Increased scrutiny and penalties

Clear ITC flow

Reverse Charge ITC

Not claimable before April 2025

Allowed after April 2025



Common Questions on ISD Compliance

1. Can an ISD distribute ITC on capital goods?

No, ITC on capital goods must be claimed by the receiving branch.

2. Can ITC be equally split among branches?

No, ITC must be allocated based on turnover proportion.

3. What happens if a business misses GSTR-6 filing?

Late fees apply, and incorrect filings can lead to ITC mismatches and GST audits.

4. Do businesses with a single GSTIN need ISD?

No, ISD applies only to businesses with multiple GST registrations under the same PAN.


Final Takeaway – What Should Businesses Do Now?

Act Now – Register as an ISD Before April 1, 2025

Educate Vendors – Ensure they raise invoices on the ISD GSTIN

Implement ITC Distribution Systems – Avoid future tax disputes

Still have questions? Consult Mari Selvam and Associates, Chartered Accountants, for expert GST guidance!


By Mari Selvam and Associates, Chartered Accountants

CA India
Mari Selvam & AssociatesChartered Accountants
Copyright © 2025 Mari Selvam & AssociatesDeveloped by
kovatic
Kovatic Technologies