Builders cannot claim GST input tax credit (ITC) on every construction bill. A registered person may generally claim credit for goods or services used, or intended for use, in business, but the CGST Act creates specific blocks for construction of immovable property. The result depends on who is claiming the credit, what the outward supply is, how each purchase is used, whether the cost is capitalised, and which rate framework applies to the project.
The most important distinction is between a works contractor buying inputs to make a further taxable works-contract supply and a business or promoter constructing an immovable property on its own account. The former has a specific statutory exception; the latter is generally subject to the blocked-credit rule, except for plant and machinery and any other provision that applies to the facts.
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Start with the claimant, not the invoice
Before reviewing an invoice, identify the taxpayer’s role and the supply being made. The same cement, engineering service or subcontractor bill can receive a different treatment depending on whether the recipient is making a further works-contract supply, selling apartments under a promoter-rate scheme, or building premises for its own use.
| Situation | What the taxpayer supplies or does | Main ITC question |
|---|---|---|
| Works contractor | Supplies a works-contract service to a customer | Is the purchase an input or input service for that further taxable works-contract supply, and does the statutory exception apply? |
| Business constructing its own premises | Creates or improves an immovable property for its own account | Section 17(5) may block goods and services used for own-account construction, even when the property supports the business. |
| Real-estate promoter | Supplies apartments or other real-estate construction services | Which project category, rate option and prescribed credit restrictions apply? |
Do not treat the phrase “used in business” as an automatic answer. It is the starting eligibility test, not a waiver of blocked-credit provisions or project-specific conditions.
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What the CGST Act permits—and then blocks
The general business-use rule
Under the general ITC rule, a registered person may take credit on goods or services used or intended to be used in the course or furtherance of business. The claim remains subject to statutory conditions concerning the tax invoice and receipt of the supply, return compliance, payment and other eligibility requirements. Apportionment and reversal rules can also apply.
The works-contract definition
The CGST Act defines a works contract as “a contract for building, construction, fabrication, completion, erection, installation, fitting out, improvement, modification, repair, maintenance, renovation, alteration or commissioning of any immovable property wherein transfer of property in goods (whether as goods or in some other form) is involved in the execution of such contract”. This definition covers far more than a new building; renovation, alteration and repairs can be relevant when the cost is capitalised.
Section 17(5)(c): works-contract services
Section 17(5)(c) blocks ITC on works-contract services supplied for construction of an immovable property, other than plant and machinery. The express exception is important: the block does not apply when the works-contract service is an input service for further supply of works-contract service.
That exception is not a blanket approval for every subcontractor invoice. The recipient must still satisfy the ordinary ITC conditions, establish that the service is used for the further works-contract supply, and consider whether another restriction or project rule applies.
Section 17(5)(d): own-account construction
Section 17(5)(d) separately blocks goods or services received for construction of an immovable property on the recipient’s own account, including when the property is used or intended for use in the course or furtherance of business. Therefore, constructing an office, warehouse, showroom or other business premises for the taxpayer’s own account does not become creditable merely because the business is registered and taxable.
For this rule, “construction” includes reconstruction, renovation, additions, alterations and repairs to the extent the expenditure is capitalised to the immovable property. The accounting treatment and the actual use of the cost therefore need to be reviewed together.
Plant and machinery is a separate issue
The immovable-property blocks contain a plant-and-machinery distinction. Do not assume that every item fixed to a building is plant and machinery, or that every machine-related cost is automatically blocked. Classify the asset and the expenditure under the applicable statutory definition and retain the reasoning in the project file.
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A works contractor may be able to claim ITC on a subcontractor’s works-contract service when the contractor uses that service as an input service for a further supply of works-contract service. This is the specific exception to the works-contract block.
- Confirm the outward supply. The contractor should have a further works-contract supply, rather than merely holding or using the property for its own account.
- Map the subcontractor service to that contract. Link the purchase order, subcontract, invoice and site records to the customer project.
- Check the invoice and tax conditions. Verify registration details, tax charged, receipt of the service and the other conditions applicable to the claim.
- Test for separate blocks. The exception does not remove restrictions caused by exempt or non-business use, apportionment, reversal or a promoter-rate condition.
- Reconcile the credit. Match the claimed amount to the works-contract revenue and the project ledger so that unsupported or duplicate credit is not carried forward.
A contractor that builds its own office or other property is in a different position from one that uses a subcontractor to fulfil a customer’s works contract. The invoice description alone cannot decide the issue.
Promoter projects after 1 April 2019: use the project framework
Specified apartment-construction supplies by promoters have a post-1 April 2019 rate and credit framework that is not identical to the general works-contractor exception. The applicable result depends on the project, the type of apartment, whether the project is a Residential Real Estate Project (RREP) or another Real Estate Project (REP), its commencement or ongoing status, and any available option or condition.
The CBIC rate material displays the following entries for certain categories. They are reproduced as the rates shown on that material, not as a universal current rate for every project; verify the operative notification and amendments before filing.
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|---|---|---|---|---|
| Affordable residential apartments in an RREP | 0.75% | 0.75% | 1.5% | Subject to the conditions and project rules attached to the cited rate entry. |
| Affordable residential apartments in an REP other than an RREP | 0.75% | 0.75% | 1.5% | Subject to the conditions and project rules attached to the cited rate entry. |
| Non-affordable residential apartments and commercial apartments in an RREP | 3.75% | 3.75% | 7.5% | Subject to the conditions and project rules attached to the cited rate entry. |
The rate table is not a credit calculator. The same CBIC material describes restrictions for specified reduced-rate supplies and prescribed treatment of credit attributable to construction. A promoter must identify the applicable notification, annexure and project calculations before deciding what can be claimed, retained or reversed.
Questions a promoter should answer first
- Is the development an RREP or another REP under the definitions used by the applicable notification?
- Does the supply involve affordable residential apartments, other residential apartments, commercial apartments, or more than one category?
- When did construction commence, and is the project an ongoing project for the relevant rule?
- Was an option available or exercised under the applicable rate notification?
- Does the chosen rate carry an input-credit restriction or a prescribed project-attributable credit treatment?
- Are purchases shared between this project and another development?
Until these questions are answered, quoting one GST rate or promising a fixed percentage of ITC is unsafe.
A practical workflow for claiming or rejecting project ITC
1. Confirm registration and the outward supply
Establish the GST registration under which the invoice is received and identify the corresponding taxable, exempt or non-business outward supply. A project ledger should show the customer contract or apartment supply to which the cost relates.
2. Classify every cost line
Separate goods, ordinary input services, works-contract services, professional services, land-related items and costs incurred for an own-account asset. Do not rely on a vendor’s generic description such as “construction material” or “site expense”.
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For each line, ask whether it is a works-contract service used for construction of immovable property, or goods or services received for own-account construction. Record whether the plant-and-machinery distinction or the further-supply works-contract exception is relevant.
4. Identify the promoter-rate conditions, if applicable
If the taxpayer is a promoter supplying apartments, classify the project and supply under the operative rate notification. Keep the rate choice, commencement status and project calculations together with the invoices.
5. Check ordinary eligibility and timing
Verify that the tax invoice and supplier details are acceptable, the supply has been received, the claim is reported in the required return period and all payment, matching, apportionment and reversal conditions are satisfied under current law.
6. Allocate shared inputs
When an input or input service serves more than one project, assign it to projects on a reasonable basis as required by the relevant rules. The allocation should be supported by usage records, area or contract schedules where appropriate, and a documented management review. Do not invent a formula when the applicable rule or facts have not been checked.
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Compare the proposed credit with the project purchase register, general ledger, supplier tax data available to the taxpayer, outward-supply turnover and any blocked-credit schedule. Investigate duplicate invoices, credit notes, cancelled supplies and costs posted to the wrong project.
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8. Preserve the decision trail
For every material invoice, retain the classification, statutory test, project code, calculation and reviewer sign-off. A clear rejection reason is as useful as a claim because it prevents the same blocked cost from being claimed in a later period.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Records that support a defensible claim
Construction businesses should maintain project-wise records rather than one undifferentiated purchase file. CBIC’s accounts-and-records rules state that a person executing works contracts must keep separate accounts for each works contract.
- Customer contract, work order and amendments.
- Subcontractor agreement, measurement sheets, completion records and site confirmations.
- Tax invoices, debit notes, credit notes and proof of receipt.
- Project code on the purchase register and general ledger.
- Bill-of-materials or service-use evidence linking the cost to the outward supply.
- Separate schedules for blocked, eligible, shared and reversed credit.
- Allocation working papers for inputs used by more than one project.
- Promoter notification, rate option, apartment classification and project-attributable credit calculations where relevant.
Accounting software can help tag invoices by project and produce reconciliation reports, but software cannot determine whether section 17(5) blocks a cost or whether a rate notification applies. That classification requires a documented legal and factual review.
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Worked fact patterns
Subcontractor builds part of a customer’s factory
A registered works contractor hires a subcontractor to perform structural and installation work under the contractor’s customer contract. The contractor should test whether the subcontractor’s service is an input service for the further supply of works-contract service. If that link is established and ordinary conditions are met, the statutory exception may permit the credit. The contractor must still examine project-specific restrictions and maintain the contract trail.
A company constructs its own headquarters
A taxable company pays a contractor to construct a headquarters that it will own and use. Because the property is being constructed on the company’s own account, section 17(5)(d) is the starting point and the business-use argument alone does not make the construction service creditable. The plant-and-machinery distinction must be examined separately for qualifying assets.
A promoter develops apartments and a commercial component
The promoter cannot apply a single rate or ITC answer to the entire site without classifying the project and each supply. RREP or REP status, affordable or other residential apartments, commercial apartments, commencement status, rate option and shared-cost allocation can change the treatment. The promoter should calculate project-attributable credit under the applicable notification and retain the supporting schedules.
Common errors and how to correct them
- Claiming all cement and steel automatically: classify the recipient’s supply and test the immovable-property blocks first.
- Treating every contractor as a works contractor: confirm that the outward supply itself is a further works-contract service.
- Ignoring capitalisation: reconstruction, renovation, additions, alterations and repairs capitalised to an immovable property can fall within the construction restriction.
- Using one project code for several developments: create a reasonable, documented attribution for shared inputs.
- Using a displayed rate without reading its conditions: verify the operative notification, annexure, commencement rules and credit restrictions.
- Keeping only invoices: preserve contracts, receipt evidence, allocation workings and the reason for allowing or rejecting each material item.
- Assuming a software report proves eligibility: treat technology as a control and reconciliation aid, not as a substitute for legal classification.
Builder’s pre-claim checklist
- Identify the claimant’s role and outward supply.
- Classify each invoice as goods, ordinary service, works-contract service or own-account construction cost.
- Apply section 17(5), including the further-supply works-contract exception and plant-and-machinery distinction.
- For apartment projects, classify RREP or REP, apartment type, commencement status and rate option.
- Check the applicable rate notification’s credit restrictions and prescribed calculations.
- Allocate shared inputs to projects on a reasonable, documented basis.
- Verify invoice, receipt, return, payment, apportionment and reversal requirements under current law.
- Maintain separate works-contract accounts and a project-wise audit trail.
- Have an Indian GST practitioner or chartered accountant review unusual structures, own-account construction and promoter calculations before filing.
The CGST Act and CBIC materials cited for these rules have been amended over time. Confirm the current statute, rules and operative notification for the relevant tax period before claiming credit; no universal amount or formula can be calculated without the builder’s project classification, invoices, registration and outward-supply facts.
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