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Input Service Distributor Registration Mandatory Since April 2025

If your head office receives common input services billed for multiple GSTINs, ISD registration is no longer optional. It became compulsory on 1 April 2025.

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GST registration was painless. They asked for documents, did the filing, and shared the certificate within a day. We were back to selling without the usual portal back-and-forth.

Ravi Menon

Founder, D2C apparel brand

Expert review

A calmer GST workflow with document checks before anything is filed.

The goal is to avoid avoidable rejections: we check documents, prepare the application, file on the GST portal, track ARN, and share the certificate when approved.

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PAN, Aadhaar, address proof, and bank details checked before submission

ARN and application status tracked after filing

Money-back assurance applies when rejection is due to our filing error

Reviewed by Priya IyerChartered Accountant & GST Reviewer · Last reviewed 30 April 2026

What's Included

Everything Included

Everything you need to register and start filing, in one bundle.

Your Bundle Breakdown

GST Registration (GSTIN in 24 hrs)
1st Month GST Return FilingFREE
Expert CA Support & ConsultationINCLUDED
Document Preparation & ARN TrackingINCLUDED

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Understanding GST

What is GST Registration?

An Input Service Distributor is an office of a supplier that receives tax invoices for input services and distributes the credit of those taxes to its own other registrations under the same PAN. Section 2(61) defines it and Section 20 governs how the distribution works.

The critical change is that it stopped being optional. The Finance Act 2024 amended Sections 2(61) and 20, and with effect from 1 April 2025 a business that receives invoices for input services on behalf of distinct persons must take ISD registration and distribute that credit through the ISD mechanism. Section 24(viii) makes the registration compulsory with no turnover threshold.

The scenario is ordinary and extremely common. Head office in Chennai signs a single contract for audit, insurance, software licensing, advertising or professional services covering the whole group, the invoice carries the Chennai GSTIN, but the benefit runs to branches in Karnataka, Maharashtra and Delhi. Before April 2025 many businesses handled that by cross-charge. That route is no longer available for the common input service case.

ISD is a separate registration, applied for in Form REG-01 by selecting ISD as the registration type, and it exists alongside your ordinary GSTIN rather than replacing it. It files GSTR-6 monthly by the 13th and does not file GSTR-1 or GSTR-3B.

15-Digit GSTINUnique tax identification

GST InvoicingIssue compliant invoices

Input Tax CreditClaim ITC on purchases

Interstate TradeSell across all states

Eligibility

Who Needs GST Registration?

Businesses registered in more than one state under the same PAN

Head offices signing group contracts for audit, insurance or professional services

Companies buying software or SaaS licences centrally for all locations

Groups running central advertising or marketing spend across branches

Corporate offices where common input service invoices land on one GSTIN

Anyone who was cross-charging common input services before April 2025

Benefits

Benefits of GST Registration

Statutory compliance

Meets the mandatory requirement in force since 1 April 2025 rather than risking credit denial.

Credit reaches the right GSTIN

Distribution follows turnover, so credit lands where the benefit was actually consumed.

Protects branch credit

Credit distributed correctly is far harder for the department to disallow at the branch.

Audit-ready trail

GSTR-6 creates a documented distribution record instead of an internal allocation memo.

Clean separation

ISD sits alongside your operating GSTIN without disturbing ordinary filing.

Formula-driven

Section 20 prescribes the allocation, which removes the argument about method.

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ISD compared with cross-charge

The two mechanisms solve adjacent problems and are routinely conflated. ISD distributes the credit of input services procured from a third party. Cross-charge is a supply between distinct persons under Schedule I, where one branch actually provides something to another, and it remains valid for that.

What changed on 1 April 2025 is that the common input service case must now go through ISD. Continuing to cross-charge a third-party input service invoice is no longer a matter of preference.

ISD distribution against cross-charge
	ISD	Cross-charge
What it covers	Credit of third-party input services	Actual supply between distinct persons
Mandatory since	1 April 2025 for common input services	Always applied where a real supply exists
Registration	Separate ISD registration required	On the existing GSTIN
Document issued	ISD invoice under Rule 54(1)	Tax invoice
Return	GSTR-6, monthly by the 13th	GSTR-1 and GSTR-3B as normal
Covers goods	No, input services only	Yes
Covers capital goods	No	Yes
Adds value	No, it only passes credit through	Yes, it is a taxable supply

How distribution works

Section 20 prescribes the method rather than leaving it to judgement. Credit attributable to a single recipient goes wholly to that recipient. Credit attributable to more than one is distributed pro rata on the basis of turnover in the state of each recipient during the relevant period, against the aggregate turnover of all recipients to whom it relates.

The head of tax follows the transaction. Credit of central and state tax is distributed as integrated tax where the recipient is in a different state, and as central and state tax where the recipient is in the same state. Ineligible credit under Section 17(5) is distributed separately from eligible credit, so the recipient can see which is which.

ISD compliance requirements
Item	Requirement	Provision
Registration	Separate ISD registration, REG-01 with ISD type	Section 24(viii)
Threshold	None. Compulsory where the mechanism applies	Section 24(viii)
Mandatory from	1 April 2025	Finance Act 2024 amendment
Return	GSTR-6, monthly	Section 39(4)
Due date	13th of the following month	Rule 65
Document	ISD invoice clearly marked as such	Rule 54(1)
Allocation basis	Pro rata on state turnover of recipients	Section 20(2)
Distributes	Input services only, not goods or capital goods	Section 2(61)

What happens if you skip it

The exposure is not primarily a late fee. It is that credit taken at the branch on a basis the law no longer permits is credit the department can disallow, with interest under Section 50 and penalty on top. Where a group has been distributing significant common input service credit by cross-charge, the accumulated exposure across states can be substantial by the time it surfaces in an audit.

Credit distributed in excess of what Section 20 permits is recoverable from the recipient under Section 21 with interest, so the risk sits at the branch as well as at head office.

Branch credit taken on the wrong mechanism is open to disallowance

Interest under Section 50 runs from the date the credit was utilised

Excess distribution is recoverable from the recipient under Section 21

GSTR-6 non-filing carries late fee separately from the credit exposure

Why This Page Exists

Proof and operating detail

We use this page to explain how the registration workflow actually works in practice, not just to collect a lead.

Document pre-check before filing

We review signatory, address, entity, and bank proofs before REG-01 is filed so applications do not fail on basic formatting or mismatch issues.

First-month compliance guidance included

The registration workflow is tied to the first filing cycle so new GSTIN holders do not get surprised by nil-return or first-month deadline issues.

Built for remote filing across India

The service flow is designed for WhatsApp and online document handoff, which matches how most founders, freelancers, and sellers actually complete registration.

Filing workflow

How GST registration works

A visible process from document collection to GSTIN delivery, with status updates along the way.

Share Your Details

Share your PAN, Aadhaar, address proof, and business details with our team.

Expert Verification

Our CA team verifies your documents, prepares the application, and files it on the GST portal.

ARN Generated

You receive your Application Reference Number (ARN) within hours of filing.

GSTIN Delivered

GSTIN is granted in three working days on the Rule 14A route, or once verification clears on the normal route.

Documents required

Documents needed for GST registration

We confirm which documents apply to your entity type before filing.

Required for most applicants

PAN Card of the applicant
Aadhaar Card of the applicant
Photograph (passport size)
Proof of business address (rent agreement / electricity bill)
Bank statement or cancelled cheque
Authorization letter / Board resolution (for companies)

Depends on business type

Incorporation certificate (for Pvt Ltd / LLP)
Digital Signature Certificate (for companies)

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FAQs

Frequently Asked Questions

Is ISD registration mandatory?

Yes, since 1 April 2025. The Finance Act 2024 amended Sections 2(61) and 20 so that a business receiving invoices for common input services on behalf of distinct persons must take ISD registration and distribute that credit through the ISD mechanism. Section 24(viii) makes the registration compulsory with no turnover threshold.

Who needs ISD registration?

Any business with registrations in more than one state under the same PAN where a single office receives third-party invoices for input services benefiting several of those registrations. Group audit, insurance, software licensing, advertising and professional services contracts are the usual triggers.

What is the difference between ISD and cross-charge?

ISD passes through the credit of input services bought from a third party. Cross-charge is an actual supply between distinct persons under Schedule I, such as one branch genuinely providing a service to another. Cross-charge remains valid for real supplies, but the common third-party input service case must now go through ISD.

Is ISD a separate registration?

Yes. It is applied for in Form REG-01 by selecting Input Service Distributor as the registration type, and it exists alongside your ordinary GSTIN. An ISD registration files GSTR-6 and does not file GSTR-1 or GSTR-3B.

Can an ISD distribute credit on goods or capital goods?

No. Section 2(61) limits the mechanism to input services. Credit on goods and capital goods is not distributed through ISD.

How is the credit split between branches?

Under Section 20(2), credit attributable to one recipient goes wholly to that recipient. Credit attributable to more than one is distributed pro rata on the turnover in the state of each recipient during the relevant period, against the aggregate turnover of all the recipients concerned.

What return does an ISD file and when?

GSTR-6, monthly, due on the 13th of the following month. It reports the credit received and how it was distributed.

What if we have been cross-charging instead?

That approach stopped being available for common input services on 1 April 2025. Register as an ISD, move the distribution onto the correct mechanism, and take advice on the period already handled by cross-charge, since credit taken at the branch on a basis the law no longer permits is exposed to disallowance with interest.

Does an ISD pay tax?

No. An ISD does not make outward supplies and has no tax liability of its own. It receives credit and passes it through, which is why it files GSTR-6 rather than GSTR-3B.