Section 20 of CGST Act - Manner of Distribution of Credit by Input Service Distributor
Section 20 of the Central Goods and Services Tax Act, 2017 governs the distribution of input tax credit through an Input Service Distributor (ISD). The provision was substantially substituted with effect from 1 April 2025, making the ISD mechanism mandatory for an office receiving specified input-service invoices for or on behalf of distinct persons.
Current text and effect of Section 20
Section 20(1): An office of a supplier that receives tax invoices for input services, including specified reverse-charge services, for or on behalf of distinct persons under Section 25 is required to be registered as an Input Service Distributor under Section 24(viii) and must distribute the input tax credit relating to those invoices.
Section 20(2): The ISD must distribute central tax or integrated tax credit charged on invoices received by it, including specified reverse-charge tax paid by a distinct person registered in the same State as the ISD, in the prescribed manner, within the prescribed time and subject to prescribed restrictions and conditions.
Section 20(3): Central tax credit is distributed as central tax or integrated tax, and integrated tax credit is distributed as integrated tax or central tax, through the prescribed document containing the amount of input tax credit.
The paragraph above is an explanatory presentation of the current provision. For the authoritative statutory text and amendment history, use the official CBIC Tax Information Portal linked below.
What is an Input Service Distributor?
Section 2(61) defines an Input Service Distributor as an office of the supplier of goods or services or both that receives tax invoices for input services, including specified services liable to tax under reverse charge, for or on behalf of distinct persons referred to in Section 25, and is liable to distribute the related input tax credit in the manner provided by Section 20.
In practical terms, the mechanism applies where a common or head office receives invoices for input services that belong to, or are attributable to, other GST registrations having the same PAN. Section 25 treats multiple registrations of the same legal person in different States or Union territories, or separate registrations within a State where permitted, as distinct persons for GST purposes.
Related provisions
- Section 24(viii): requires compulsory GST registration for an Input Service Distributor.
- Section 25: deals with registration and the concept of distinct persons for separate GST registrations.
- Section 9(3) and 9(4): provide for specified reverse-charge liabilities under the CGST Act.
- Section 5(3) and 5(4) of the IGST Act: contain corresponding reverse-charge provisions for integrated tax and are now expressly covered by the ISD framework.
Rule 39 - procedure for distribution of input tax credit by ISD
Section 20 works with Rule 39 of the CGST Rules. The rule prescribes the operational method for distribution. Key requirements include distribution of available credit for a month in that month, reporting through FORM GSTR-6, and ensuring that the amount distributed does not exceed the credit available for distribution.
Credit attributable exclusively to one recipient is distributed to that recipient. Credit attributable to more than one recipient is apportioned among the relevant recipients, while common credit attributable to all recipients is distributed among all such recipients. The prescribed turnover-based formula is used for proportionate distribution where applicable.
Eligible and ineligible credit must be distributed separately, and credit relating to central tax, State tax, Union territory tax and integrated tax is dealt with separately in accordance with Rule 39. The rule also provides for ISD invoices, ISD credit notes and adjustments arising from supplier debit notes or credit notes.
Practical compliance points for businesses
- Identify offices that receive third-party input-service invoices for or on behalf of other GST registrations under the same PAN.
- Where Section 20 applies, obtain the separate compulsory ISD registration required by Section 24(viii).
- Map each input-service invoice to the recipient GST registration or registrations to which the service is attributable.
- Distribute the credit within the prescribed period and according to Rule 39, including the prescribed turnover-based allocation for common services.
- Issue the prescribed ISD document and report the distribution in FORM GSTR-6.
- Maintain separate treatment of eligible and ineligible ITC and make required debit-note or credit-note adjustments.
Why the 2025 amendment matters
The earlier Section 20 described conditions under which an ISD could distribute credit. The substituted provision changes the structure materially: where an office receives covered input-service invoices for or on behalf of distinct persons, ISD registration and distribution are mandatory. Businesses with centralized procurement of common input services should therefore review invoice routing, GST registrations and their ISD compliance process for periods beginning on or after 1 April 2025.
Official GST resources
For the current statutory text, amendment notes and rules, refer to the CBIC Tax Information Portal - Section 20, the CBIC GST Acts page, and the CBIC Input Tax Credit Rules.