Businesses incur dozens of service expenses every month, ranging from factory security and software subscriptions to audit fees and freight charges. Determining whether each procurement qualifies as an input service requires checking the statutory definition, verifying that the transaction is not excluded under Schedule III, and testing whether input tax credit (ITC) is blocked under Section 17(5).
Statutory definition of input service under Section 2
The term input service is defined in Section 2(60) of the CGST Act 2017. Under this provision, input service means any service used or intended to be used by a supplier in the course or furtherance of business. Note that while Section 2(33) defines a continuous supply of services, Section 2(60) provides the core definition for input services, distinct from inputs under Section 2(59) which covers goods other than capital goods.
To claim ITC on an input service, the taxpayer must meet the general entitlement requirements of Section 16 of the CGST Act 2017. The recipient must hold a valid tax invoice or debit note, actually receive the service under Section 16(2)(b), ensure the supplier reports the transaction in GSTR-1 so it reflects in GSTR-2B per Section 16(2)(aa), and pay the supplier within 180 days to avoid reversal under Rule 37. You can check the complete baseline framework in our guide on ITC claim rules under GST.
Refund restriction on input services: In the landmark ruling Union of India vs VKC Footsteps India Pvt Ltd (Civil Appeal No. 4810 of 2021), the Supreme Court affirmed that refund of unutilised ITC under Section 54(3)(ii) for inverted duty structure is confined strictly to inputs and does not cover input services or capital goods.
Schedule III exclusions: transactions that are not supplies
Section 7(2) of the CGST Act provides that activities specified in Schedule III shall be treated neither as a supply of goods nor as a supply of services. Because these transactions fall outside the tax net entirely, they generate no output tax liability and cannot generate eligible input services for the recipient.
Key Schedule III transactions affecting business operations include:
- Services by an employee to an employer: Per Entry 1 of Schedule III and CBIC Circular No. 172/04/2022-GST, salary and perquisites provided in terms of the employment contract are non-supplies. Nominal recoveries from employees for canteen facilities also do not constitute taxable supplies.
- Director remuneration: As clarified in CBIC Circular No. 140/10/2020-GST, executive director remuneration subject to TDS under Section 192 of the Income-tax Act is an employee service covered by Schedule III. In contrast, fees paid to independent or non-executive directors are outside Schedule III, taxable under reverse charge mechanism (RCM) per Notification No. 13/2017-Central Tax (Rate), and eligible as input services.
- Sale of land and building: Per Entry 5 of Schedule III and Section 17(3), sale of land or completed building where the entire consideration is received after the issuance of completion certificate is a non-supply, requiring proportionate reversal of common input service ITC.
Pure agent exclusions under Rule 33
Certain payments made by service providers are disbursements incurred on behalf of the client rather than their own input services. Under Rule 33 of the CGST Rules 2017, costs incurred by a supplier as a pure agent of the recipient are excluded from the taxable value of supply.
For example, when a customs broker pays statutory port charges or MCA filing fees on behalf of a client and recovers the exact amount without any markup, that disbursement qualifies for pure agent treatment. The recipient cannot claim ITC on the broker's invoice for those pure agent lines because no GST was charged on them.
Common input services and their ITC eligibility
Even when a service satisfies the definition under Section 2(60), credit can be blocked by Section 17(5) of the CGST Act 2017. Review our detailed guide to blocked credit under Section 17(5) for complete line-by-line restrictions.
| Service category | Governing provision | ITC status | Key condition or restriction |
|---|---|---|---|
| Software licenses & SaaS | Section 16(1) | Eligible | Used for business operations; invoice in GSTR-2B. |
| Auditing & legal counsel | Section 16(1) / RCM | Eligible | Legal fees paid under RCM qualify as input services. |
| Employee canteen & catering | Section 17(5)(b)(i) | Blocked | Blocked unless statutory obligation under the Factories Act. |
| Factory building repair | Section 17(5)(c) | Eligible | Eligible if expensed to P&L; blocked if capitalised. |
| CSR project management | Section 17(5)(fa) | Blocked | ITC blocked on CSR expenses under Companies Act Section 135. |
| Motor vehicle rental (cab hire) | Section 17(5)(b)(i) | Restricted | Blocked unless vehicle seating capacity exceeds 13 persons. |
Common mistake on renting motor vehicles: Renting a commercial cab for routine staff commuting is blocked under Section 17(5)(b)(i). Do not claim ITC on such invoices unless you operate in the same outward line of business or the law mandates providing transport to those employees.
Worked example: monthly input service classification
Consider Alpha Tech Solutions Pvt Ltd, an IT consulting firm in Bengaluru. In September 2026, the company receives five invoices for various professional and operational services:
| Service description | Taxable value | GST (18%) | Classification | Admissible ITC |
|---|---|---|---|---|
| Cloud hosting infrastructure | ₹2,00,000 | ₹36,000 | Section 2(60) business input service | ₹36,000 |
| Statutory audit fees | ₹1,00,000 | ₹18,000 | Section 2(60) business input service | ₹18,000 |
| Executive event catering | ₹50,000 | ₹9,000 | Blocked under Section 17(5)(b)(i) | ₹0 |
| Independent director sitting fees (RCM) | ₹50,000 | ₹9,000 | RCM input service per Circular 140/10/2020 | ₹9,000 |
| CSR implementation consulting | ₹1,00,000 | ₹18,000 | Blocked under Section 17(5)(fa) | ₹0 |
Computation of net eligible ITC for Alpha Tech Solutions:
Total GST charged on inward services: ₹36,000 + ₹18,000 + ₹9,000 + ₹9,000 + ₹18,000 = ₹90,000.
Total ineligible credit under Section 17(5): ₹9,000 (catering) + ₹18,000 (CSR) = ₹27,000.
Net admissible ITC claimed in GSTR-3B Table 4(A)(5): ₹90,000 - ₹27,000 = ₹63,000.
Frequently asked questions
What is the definition of input service under GST?
Under Section 2(60) of the CGST Act 2017, an input service means any service used or intended to be used by a supplier in the course or furtherance of business.
Are employer-employee activities considered input services?
No. Per Entry 1 of Schedule III read with CBIC Circular No. 172/04/2022-GST, services by an employee to the employer in the course of employment are non-supplies, meaning no GST applies and no ITC arises.
How does Rule 33 treat pure agent expenses?
Under Rule 33 of the CGST Rules 2017, expenditure incurred as a pure agent on behalf of the recipient is excluded from the taxable value of supply, so no GST is charged on direct reimbursements.
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Last checked: 21 October 2026. Sources: CBIC Tax Information Portal - Section 2, CBIC Circular No. 172/04/2022-GST, GSTN ITC Portal Guide.