Cross Charge vs ISD: GST on Common Services Across Distinct Persons

Cross Charge or ISD? Decoding the GST Treatment of Common Services Across Distinct Persons

Summary: The article explains the distinction between the Input Service Distributor (ISD) mechanism and cross charge under GST for common services received across multiple GST registrations of the same legal entity. It explains that ISD is a mechanism for distribution of input tax credit relating to input services, while cross charge concerns supplies of goods or services between distinct persons. The article highlights the change effective from 1 April 2025, pursuant to which the ISD framework became mandatory where common input services are received for or on behalf of distinct persons. It distinguishes third-party common input services from internally generated services and explains the relevance of Sections 2(61), 20 and 25 of the CGST Act, Schedule I, Section 7, Section 15 and Rule 28. It also discusses the second proviso to Rule 28 and the treatment of internally generated services where the recipient is eligible for full ITC, including the nil-value position referred to in Circular No. 199/11/2023-GST. The article concludes that the appropriate GST treatment depends on identifying the underlying transaction rather than simply choosing between ISD and cross charge.

Introduction

The advent of GST brought with it a fundamental structural change for businesses operating through multiple locations. A single legal entity may operate through several GST registrations across different States, each registration being treated as a separate taxable person for GST purposes.

In a typical corporate structure, the Head Office (“HO”) may centrally procure services such as professional consultancy, audit services, software licences, advertising, recruitment, subscriptions, security, information technology and other administrative services. While the vendor may raise the invoice on the HO, the underlying service may benefit one or more branch offices (“BOs”) or other GST registrations of the same legal entity.

This gives rise to a deceptively simple but legally significant question:

When a common service is procured centrally but benefits multiple GST registrations, should the associated input tax credit be distributed through the Input Service Distributor (“ISD”) mechanism, or should the service be cross-charged from one GST registration to another?

The question has acquired even greater significance after the statutory amendments made effective from 1 April 2025, pursuant to which the ISD mechanism was made mandatory for the distribution of eligible input tax credit relating to common input services received for or on behalf of distinct persons.

However, the expression “ISD versus Cross Charge” can itself be misleading.

ISD and cross charge do not perform the same legal function.

ISD is fundamentally a mechanism for distribution of input tax credit relating to input services.

Cross charge, on the other hand, is fundamentally concerned with a supply of goods or services between distinct persons.

The distinction becomes critical when determining whether a particular transaction belongs within the ISD framework, whether it constitutes an independent supply between distinct persons, and whether any tax invoice is required at all.

1. The Problem of Multiple GST Registrations

Large organisations commonly maintain GST registrations in several States. A central office may procure services such as:

• professional and legal services;
• audit and accounting services;
• enterprise software and licences;
• advertising and marketing services;
• HR and recruitment services;
• common subscriptions;
• IT and cloud services;
• security services;
• management and administrative services; and
• other corporate support services.

The difficulty arises when the invoice is received by one GST registration but the service is attributable to, or benefits, several GST registrations.

For example, assume that the Head Office receives an annual enterprise software subscription of ₹10 lakh plus GST. The software is used by the Head Office as well as the Delhi, Mumbai and Bengaluru registrations.

The GST credit appearing on the vendor’s invoice cannot simply be treated as the exclusive credit of the HO merely because the vendor’s invoice bears the HO’s GSTIN.

The GST framework therefore contains mechanisms to deal with such situations.

Historically, businesses considered two routes:

1. Input Service Distributor (“ISD”); or

2. Cross charge between distinct persons.

The legal position, however, has evolved considerably.

2. Understanding the Two Concepts

A. What is an Input Service Distributor?

Section 2(61) of the CGST Act defines an Input Service Distributor as an office of the supplier of goods or services which receives tax invoices towards input services for or on behalf of distinct persons and is liable to distribute the input tax credit in the prescribed manner.

The essential characteristic of ISD is therefore the receipt of an input service and the subsequent distribution of the associated ITC to eligible registrations having the same PAN.

Section 20 prescribes the manner in which such credit is to be distributed. The ISD mechanism operates through a separate registration and prescribed documentation, including the issuance of an ISD document/invoice and the filing of the applicable return.

The conceptual flow can therefore be represented as:

Third-party service provider

↓

ISD / central office receiving the input service

↓

Distribution of eligible ITC

↓

Recipient GST registrations

The ISD mechanism is consequently a credit-distribution mechanism.

It does not, in substance, create a fresh taxable supply of the underlying service between the ISD and the recipient registration.

B. What is Cross Charge?

Cross charge arises from a fundamentally different legal proposition.

Under Section 25(4) of the CGST Act, where a person obtains more than one registration, each registration is treated as a distinct person for GST purposes.

Further, Schedule I treats certain supplies between distinct persons as supplies even where they are made without consideration.

Accordingly, where one GST registration actually provides goods or services to another GST registration of the same legal entity, the transaction may constitute a taxable supply between distinct persons.

For example:

HO provides management / HR / IT / administrative services to BO

↓

HO and BO are distinct persons

↓

Supply between distinct persons

↓

Tax invoice

↓

GST discharged by HO

↓

BO claims eligible ITC

Cross charge is therefore fundamentally a supply mechanism.

The recipient is not merely receiving distributed credit. Rather, it is receiving a taxable supply from another distinct person.

3. The Fundamental Distinction: What Exactly Is Being Transferred?

This is the most important conceptual distinction in the entire debate.

Particulars	ISD	Cross Charge
Basic nature	Distribution of ITC	Supply of goods/services
Primary purpose	Distribution of input-service ITC	Taxation of supply between distinct persons
Underlying transaction	Input service received from third party	Service supplied by one registration to another
Legal mechanism	Section 20 read with Rule 39	Section 7 read with Section 25 and Schedule I
Document	ISD invoice/document	Tax invoice
Fresh supply between registrations?	No, merely distribution of credit	Yes, where a taxable supply exists
GST on distribution	No fresh output tax merely because credit is distributed	GST is payable on taxable cross-charged supply
Recipient’s benefit	ITC distributed to recipient	ITC on tax charged by supplier registration
Valuation	Distribution according to prescribed methodology	Valuation under Section 15 / Rule 28 and applicable rules
Core focus	Credit	Supply

Accordingly:

ISD and cross charge should not be regarded as two interchangeable names for the same mechanism.

They address different legal situations.

4. Why Does the Confusion Between ISD and Cross Charge Arise?

The confusion arises because both mechanisms may appear in the same commercial fact pattern.

Consider:

HO → Common service → Multiple GST registrations

Suppose HO receives a common security service from an external security agency.

The service provider raises an invoice on HO.

The security service, however, benefits HO as well as several branches.

Historically, the question was:

Should HO distribute the ITC through ISD? Or: Can HO issue a tax invoice to the branches and cross-charge the service?

Prior to 1 April 2025, CBIC Circular No. 199/11/2023-GST clarified that, under the then-existing legal framework, the HO had the option of distributing ITC through ISD or issuing tax invoices to the concerned BOs in appropriate cases.

That historical position, however, should not be mechanically applied to the current law.

5. The Major Change from 1 April 2025: ISD Becomes Mandatory for Common Input Services

The GST Council had recommended making the ISD mechanism mandatory prospectively for distribution of ITC relating to common input services procured from third parties but attributable to multiple distinct persons.

Pursuant to the legislative amendments, Section 20 was substituted with effect from 1 April 2025.

The amended Section 20(1) provides that an office receiving tax invoices for input services for or on behalf of distinct persons is required to be registered as an ISD and distribute the ITC in accordance with the prescribed provisions.

Thus, the legal position can broadly be divided into two periods:

Period	Common third-party input services
Up to 31 March 2025	ISD mechanism was not mandatory; Circular 199 permitted the then-existing alternative framework
From 1 April 2025	Mandatory ISD framework applies where input services are received for or on behalf of distinct persons

This distinction is crucial.

One cannot take a position under the post-1 April 2025 law merely by relying upon the pre-1 April 2025 flexibility clarified under Circular No. 199/11/2023-GST.

6. Is ISD Mandatory?

Yes – but the answer requires a qualification.

From 1 April 2025, ISD is mandatory where the statutory conditions for ISD are satisfied.

The amended Section 2(61) and Section 20 specifically contemplate an office receiving input-service invoices for or on behalf of distinct persons and distributing the associated ITC.

Therefore, where:

• a third-party service provider supplies an input service;
• the invoice is received by one GST registration/office;
• the service is received for or on behalf of other distinct persons; and
• ITC relating to that service is required to be distributed,

the ISD framework is the prescribed mechanism.

The conclusion is particularly important for services such as:

• common software licences;
• common professional services;
• common audit services;
• common advertising services;
• common subscriptions;
• common security services; and
• other centrally procured input services attributable to multiple registrations.

7. Is Cross Charge Mandatory?

The answer is not an absolute yes or no.

It depends upon what is actually happening between the registrations.

This is where the distinction between third-party input services and internally generated services becomes critical.

Situation 1 — Third-party common input service

Example:

External vendor → HO → multiple branches

The vendor has supplied the service.

The HO has received the invoice.

The service is attributable to multiple GST registrations.

From 1 April 2025, the ITC distribution is governed by the mandatory ISD mechanism.

In such a case, cross charge should not be used merely as an alternative method of distributing the third-party service’s ITC.

Situation 2 — Internally generated service

Example:

HO’s finance team / HR team / IT team / management function → BO

Here, there may be a separate question:

Has HO itself supplied a service to the BO?

If yes, the transaction is not merely an ITC distribution exercise. It is a potential supply between distinct persons.

In such circumstances, the cross-charge provisions become relevant.

This distinction is fundamental.

8. The Most Important Relief: Full ITC Recipient and the “Nil Value” Position

There is an important and often misunderstood aspect of cross charge.

It arises from the second proviso to Rule 28.

Rule 28 deals with valuation of supplies between distinct or related persons. It generally requires determination based upon open market value, value of like kind and quality, or, where necessary, the valuation rules including Rule 30/31.

However, the second proviso to Rule 28 provides:

Where the recipient is eligible for full input tax credit, the value declared in the invoice is deemed to be the open market value.

This provision is extremely significant in the context of inter-branch services.

9. Where Full ITC Is Available, Is Cross Charge Still Necessary?

Circular No. 199/11/2023-GST provides significant relief in respect of internally generated services where the recipient BO is eligible for full ITC.

The Circular clarifies that where HO provides internally generated services to a BO and the BO is eligible for full ITC, the value declared in the invoice by HO is deemed to be the open market value under Rule 28.

More importantly, where HO has not issued a tax invoice for a particular internally generated service, the value of such service may be deemed to have been declared as Nil, which may then be treated as the open market value under the second proviso to Rule 28.

This leads to a commercially significant result:

Where full ITC is available:

Value declared = Nil

↓

Nil treated as Open Market Value

↓

Taxable value = Nil

↓

No output GST arises merely from the valuation of that internally generated service

Accordingly, in appropriate cases, there may be no practical requirement to raise a cross-charge invoice merely to create a taxable value where the recipient is eligible for full ITC, subject always to the factual question of whether there is an identifiable internally generated service in the first place and the precise applicability of Circular 199.

10. The “Full ITC” Test — What Does It Really Mean?

The expression “full ITC” should not be interpreted merely to mean that the recipient is generally eligible to claim ITC. The relevant test is whether the recipient is entitled to avail the entire GST charged on the particular supply, without any restriction, apportionment or reversal.

Accordingly, the following should be examined:

• whether the service is used in the course or furtherance of business;
• whether it relates wholly to taxable/zero-rated supplies or partly to exempt supplies;
• whether ITC is blocked under Section 17(5);
• whether any other restriction under Section 17 applies; and
• whether any proportionate reversal is required under the applicable provisions.

Thus, “full ITC” is a transaction-specific test, not merely an entity-level test. A recipient cannot be treated as eligible for full ITC simply because it generally claims ITC.

The relevant question is:

Would the recipient be entitled to avail the entire GST charged on that particular supply as ITC?

Only where the answer is affirmative should the full-ITC condition under Rule 28 be considered satisfied.

11. Practical Decision Tree

The entire framework can be reduced to the following decision tree:

Is there an external third-party input service?

YES

Is it received for or on behalf of other distinct persons?

YES

Post 1 April 2025 → Examine mandatory ISD mechanism

Distribute eligible ITC in accordance with Section 20 / Rule 39.

Alternatively:

Is HO itself providing a service to another GST registration?

YES

Are the registrations distinct persons?

YES

Does the transaction constitute a supply?

YES

Examine Section 7 + Schedule I + Section 15 + Rule 28

Is recipient eligible for full ITC?

YES

Examine second proviso to Rule 28

Nil-value outcome may be available in appropriate cases.

12. Conclusion

The ISD versus cross-charge debate is often presented as a choice between two alternative methods of moving GST credit between different registrations.

That approach is increasingly inadequate.

The real distinction is much more fundamental.

ISD deals with the distribution of input tax credit arising from input services.

Cross charge deals with the taxation of supplies between distinct persons.

The distinction became even more important from 1 April 2025, when the statutory ISD framework was made mandatory for common input services received for or on behalf of distinct persons.

At the same time, cross charge has not disappeared.

It continues to have relevance where one distinct person actually provides services to another distinct person, particularly in relation to internally generated services.

And within that framework lies an important valuation relief:

Where the recipient is eligible for full input tax credit, the second proviso to Rule 28 can deem the value declared in the invoice to be the open market value.

CBIC Circular No. 199/11/2023-GST goes one step further in the context of internally generated services by recognising that, where full ITC is available and no invoice is issued, the value may be deemed to be Nil.

Therefore, the correct legal approach is not:

“Should we use ISD or cross charge?”

It is:

“What is the underlying transaction?”

Once that question is answered, the GST treatment becomes considerably clearer:

• Third-party common input service → ISD
• Internally generated service → Supply / cross-charge analysis
• Full ITC recipient → Examine Rule 28’s second proviso and Circular 199
• Rule 30 → Cost-based valuation where applicable, not the source of the full-ITC nil-value relief.

The future of the ISD versus cross-charge debate therefore lies not in choosing the more convenient mechanism, but in correctly identifying the legal character of the underlying transaction.