Apportionment of Credit and Blocked Credits — Section 17 of the CGST Act, 2017

1. What Section 17 does

Section 17 determines how much otherwise-eligible input tax credit can actually be retained and which categories of inward supplies are specifically blocked.

Section 16 establishes the basic entitlement to ITC. Section 17 then acts as a filter and apportionment mechanism. It deals with inputs that are partly business and partly non-business, inputs used for taxable and exempt supplies, the special 50% option available to specified banking/financial institutions, and specific categories of blocked credit.

The original GST Council material describes Section 17 as “Apportionment of credit and blocked credits” and sets out the same two-stage apportionment architecture: business/non-business and taxable/exempt. citeturn0search0turn0search5

2. Complete statutory structure

3. Section 17(1) — business versus non-business use

Where goods or services are used partly for business and partly for other purposes, ITC is restricted to the amount attributable to the purposes of the business.

Example

A company purchases a vehicle or equipment used 80% for business and 20% for personal purposes. Even before considering Section 17(5), the business/non-business attribution principle must be tested. If Section 17(5) independently blocks the credit, the separate blockage may make the attribution exercise irrelevant for that item.

4. Section 17(2) — taxable/zero-rated versus exempt supplies

Where goods or services are used partly for taxable supplies, including zero-rated supplies, and partly for exempt supplies, ITC is restricted to the amount attributable to taxable/zero-rated supplies.

This is the foundation for common-credit reversal under Rule 42 for inputs/input services and Rule 43 for capital goods.

5. Section 17(3) — what counts in the value of exempt supply?

Section 17(3) provides that the value of exempt supply for Section 17(2) is as prescribed and includes specified categories such as supplies on which the recipient is liable to pay tax under reverse charge, transactions in securities, sale of land and specified sale of building.

The explanation was amended by Finance Act 2023 to address certain Schedule III transactions, particularly paragraph 8(a), subject to the value prescribed through the Rules.

The GST Council's 50th meeting material explains why paragraph 8(a) of Schedule III was brought into the Section 17(3) framework and how Rule 43 was aligned for arrival duty-free shops. citeturn3search27turn3search4

6. Rules 42 and 43 — how the reversal is actually calculated

Section 17 gives the principle; the Rules provide the calculation mechanism.

Rule 42 — inputs and input services

Rule 42 separates credit into categories including exclusive non-business use, exclusive exempt use, exclusive taxable use and common credit. The common pool is then subjected to the prescribed attribution/reversal formula.

Rule 43 — capital goods

Rule 43 provides the corresponding treatment for common capital goods, including the prescribed useful-life-based monthly attribution mechanism.

The GST Council's detailed rules material reproduces the Rule 42/43 architecture and the distinction between inputs/input services and capital goods. citeturn0search9

7. Section 17(4) — special 50% option for banks, financial institutions and NBFCs

A banking company or financial institution, including an NBFC, engaged in accepting deposits or extending loans/advances has an option:

1. follow the normal Section 17(2) apportionment; or
2. avail every month an amount equal to 50% of eligible ITC on inputs, capital goods and input services, with the balance lapsing.

The option, once exercised, cannot be withdrawn during the remaining part of the financial year. The 50% restriction does not apply to tax paid on supplies made by one registered person to another registered person having the same PAN.

CBIC's sectoral FAQ confirms that Section 17(4) applies qua the relevant registration and that supplies between registrations having the same PAN are outside the 50% restriction. citeturn3search0turn3search1

8. Section 17(5) — blocked credits

Section 17(5) begins with a non-obstante clause. It overrides the normal entitlement under Section 16(1) and the special registration ITC framework in Section 18(1) for the listed categories.

The most important point is that blocked credit is not merely a proportional reversal. Where a clause applies, the specified ITC is not available, subject to the exceptions written into the clause.

The GST Council's current materials reproduce the blocked-credit framework and its amendments. citeturn0search1turn2search3

9. Motor vehicles and conveyances — Section 17(5)(a)

ITC is generally blocked for motor vehicles for transportation of persons having approved seating capacity of not more than 13 persons, including the driver.

Exceptions include use for:

• further supply of the vehicle/conveyance;
• transportation of passengers; or
• imparting training on driving such vehicles.

There is also a separate statutory treatment for transportation of goods.

The GST Council's 25th meeting agenda specifically discussed construction vehicles such as dumpers, tippers, dozers, cranes, forklifts and excavators and the transport-of-goods exception. citeturn0search5

10. Insurance, repair and maintenance — Section 17(5)(ab)

Section 17(5)(ab) blocks insurance, servicing, repair and maintenance relating to motor vehicles, vessels or aircraft for which ITC itself is blocked, subject to the statutory exceptions.

The 28th GST Council recommendations broadened the structure of Section 17(5) and clarified that the relevant exceptions extend through the corresponding categories. citeturn0search10turn0search7

11. Food, catering, health, clubs and employee benefits — Section 17(5)(b)

Section 17(5)(b) covers a broad set of employee-related and welfare expenses:

The 47th GST Council material specifically clarified that the proviso relating to legally obligatory employer benefits applies to the whole of clause (b), not merely one sub-clause. citeturn0search7

12. Works-contract services — Section 17(5)(c)

ITC is blocked on works-contract services when supplied for construction of an immovable property, other than plant and machinery, except where the input service is used for further supply of works-contract service.

Two important exceptions

This clause is particularly important for EPC, infrastructure and construction businesses because the accounting label “subcontractor” does not by itself determine ITC eligibility. The actual nature of the inward service and the resulting immovable property must be examined.

The GST Council/AAR material confirms that Section 17(5)(c) specifically concerns works-contract service used for construction of immovable property and contains the plant-and-machinery/further-supply exceptions. citeturn0search18turn0search23

13. Own-account construction — Section 17(5)(d)

Section 17(5)(d) blocks goods or services received by a taxable person for construction of an immovable property on his own account, including when used in the course or furtherance of business, except where the resulting construction is plant and machinery under the current amended wording.

This is different from Section 17(5)(c), which deals with works-contract services supplied for construction. A contractor constructing an asset for its customer and a business constructing its own office/building are not the same statutory fact pattern.

14. Plant and machinery — the major 2024–2025 judicial and legislative development

This is one of the most important current developments under Section 17.

Safari Retreats — Supreme Court, 3 October 2024

In Chief Commissioner of CGST v. Safari Retreats Pvt. Ltd., the Supreme Court analysed the then-existing phrase “plant or machinery” in Section 17(5)(d) and held that it was distinct from the defined expression “plant and machinery”. The Court considered the functionality test and held that, on facts, an immovable building could qualify as “plant” for Section 17(5)(d). citeturn1search3turn1search12

Finance Act 2025 changed the statutory position

Finance Act 2025 substituted “plant or machinery” with “plant and machinery” in Section 17(5)(d), added the corresponding explanation and made the change retrospectively effective from 1 July 2017. Notification No. 16/2025-Central Tax dated 17 September 2025 brought the provision into force.

Current definition

“Plant and machinery” means apparatus, equipment and machinery fixed to earth by foundation or structural support, used for making outward supply, including foundation and structural supports, but excluding land, building or other civil structures, telecommunication towers, and pipelines laid outside factory premises.

15. Supplies taxed under composition — Section 17(5)(e)

ITC is not available on goods or services or both on which tax has been paid under Section 10, i.e. the composition scheme.

The underlying principle is straightforward: composition taxpayers generally discharge tax under the composition mechanism rather than charging ordinary GST in the same way as regular taxpayers. Allowing the recipient ordinary ITC on that tax would undermine the statutory scheme.

16. Non-resident taxable persons — Section 17(5)(f)

ITC is blocked for goods or services received by a non-resident taxable person, except on goods imported by that person.

This is a specialised provision. A non-resident taxable person should therefore separately identify imported goods and domestic inward supplies when maintaining the ITC ledger.

17. CSR expenditure — Section 17(5)(fa)

Finance Act 2023 inserted Section 17(5)(fa), effective from 1 October 2023. ITC is blocked for goods or services received by a taxable person that are used or intended to be used for activities relating to the person's obligations under Section 135 of the Companies Act, 2013.

The GST Council's 48th meeting material records the Law Committee's recommendation to expressly block ITC on CSR expenditure, and the provision was subsequently inserted through Finance Act 2023. citeturn0search26turn2search9

Documentation

Finance teams should tag CSR-related purchase orders, invoices and vendor payments separately from ordinary business expenditure so that the ITC engine can automatically exclude them.

18. Personal consumption — Section 17(5)(g)

ITC is blocked for goods or services used for personal consumption.

This is distinct from Section 17(1). Section 17(1) deals with mixed business/non-business use and permits attribution to the business portion. Section 17(5)(g) is an express blockage for personal consumption.

19. Lost, stolen, destroyed, written-off, gifts and free samples — Section 17(5)(h)

ITC is blocked for goods that are:

• lost;
• stolen;
• destroyed;
• written off; or
• disposed of by way of gift or free samples.

This provision is particularly relevant to inventory controls, promotional samples, damaged stock and project materials lost at sites.

Practical control

When a stock adjustment is passed in ERP, the system should identify whether the corresponding goods carried ITC and trigger a Section 17(5)(h) review.

20. Tax paid under Section 74 — Section 17(5)(i)

The current clause blocks ITC on tax paid under Section 74 in respect of any period up to FY 2023-24. The earlier wording also covered Sections 129 and 130; the 2024 amendment removed those references and restricted the Section 74 wording to the specified historical period.

This amendment was part of the broader restructuring of demand provisions around Section 74A. The GST Council's 53rd meeting material records the recommendation to omit the older Section 17(5)(i) references for later periods. citeturn2search3

21. Amendment timeline — Section 17

22. GST Council developments

23. Judicial developments — especially construction ITC

Safari Retreats

The Supreme Court's October 2024 judgment became the central judicial development under Section 17(5)(d). It treated “plant or machinery” as different from the defined “plant and machinery” and considered the functionality test for an immovable building. citeturn1search3

After the judgment

The legislature subsequently amended Section 17(5)(d) retrospectively to use the defined expression “plant and machinery”. The amendment is therefore critical when reviewing current assessments, refund claims, audits and litigation.

24. Construction & infrastructure — Section 17 in practice

For a construction company, Section 17 is often the most important ITC-filtering provision after Section 16.

25. Detailed practical examples

Example 1 — office rent for taxable business

If office rent is used wholly for taxable business activity and is not otherwise blocked, Section 17(1)/(2) may not require a proportionate reduction merely because the company has some exempt activity elsewhere. But if the same input is common to taxable and exempt supplies, Rule 42 must be applied.

Example 2 — common audit fee

An audit fee relates to both taxable and exempt operations. The common ITC is not automatically fully eligible; the Section 17(2)/Rule 42 calculation must be performed.

Example 3 — bank 50% option

A qualifying bank chooses the Section 17(4) option at the beginning of the financial year. It cannot withdraw the option during the remaining part of that FY, and eligible monthly ITC is subject to the 50% mechanism.

Example 4 — contractor receiving works-contract service

A main contractor receives works-contract services from a subcontractor for a taxable outward works-contract project. Section 17(5)(c) contains an exception where the input service is used for further supply of works-contract service, subject to the exact facts.

Example 5 — own commercial building

A company constructs its own office building for use in business. The fact that the office supports taxable business does not by itself overcome Section 17(5)(d).

Example 6 — plant and machinery

A manufacturer installs qualifying machinery fixed to earth by foundation/structural support for making outward supplies. The current statutory definition of plant and machinery must be applied, including its exclusions.

Example 7 — mandatory CSR procurement

A company purchases goods for a project undertaken to discharge Section 135 CSR obligations. For supplies covered by Section 17(5)(fa), ITC is blocked.

Example 8 — employee food under statutory obligation

An employer is legally required under applicable law to provide a particular employee facility. The proviso to Section 17(5)(b) must be examined rather than automatically treating the expense as blocked.

Example 9 — stock destroyed in a fire

Goods on which ITC was claimed are destroyed in a site fire. Section 17(5)(h) requires review because destroyed goods fall within the blocked-credit category.

Example 10 — tax paid under old Section 74

A demand relates to FY 2022-23 and tax is paid under Section 74. Section 17(5)(i) must be applied because the current wording expressly covers Section 74 tax for periods up to FY 2023-24.

26. Professional ITC reversal workflow

27. Audit documentation

28. Common mistakes

• Calling every common input “fully eligible” because the company mainly makes taxable supplies.
• Using gross exempt turnover without applying Section 17(3) and Rule 42/43 definitions.
• Ignoring zero-rated supplies in the taxable side of the apportionment.
• Applying the 50% bank/NBFC method without checking whether the entity and activity qualify.
• Claiming ITC on a passenger vehicle without testing Section 17(5)(a).
• Claiming vehicle insurance/repair without checking 17(5)(ab).
• Treating every works-contract invoice as blocked without checking the further-supply and plant-and-machinery exceptions.
• Assuming any business building is “plant and machinery”.
• Applying the pre-2025 Safari Retreats interpretation without considering the retrospective Finance Act 2025 amendment.
• Missing the 1 October 2023 effective date for CSR blockage.
• Failing to reverse ITC on goods lost, stolen, destroyed or written off.
• Applying the old Section 17(5)(i) references to Sections 129/130 after the statutory amendment.

29. Related provisions