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Income Tax | Chapter VI-A | Updated October 2026

Section 80-IA Deduction for Infrastructure, Power and Other Eligible Businesses

Section 80-IA of the Income-tax Act, 1961 provides a profit-linked deduction for specified infrastructure facilities, power undertakings, telecommunications services and industrial parks. Eligibility depends on the particular business, statutory start dates, ownership, agreements, audited accounts and the assessment year concerned. It is not a general deduction for every industrial undertaking.

Legal status: The Income-tax Act, 2025 took effect on 1 April 2026. Section 80-IA below describes the 1961 Act framework relevant to earlier tax years and legacy tax-holiday claims. For tax year 2026-27 and later, consult the corresponding provisions and transitional rules of the 2025 Act rather than assuming that an old section number or incentive applies unchanged.

Meaning of Section 80-IA and the tax holiday

Under section 80-IA(1), qualifying profits and gains derived from an eligible business specified in subsection (4) were deductible at 100% for ten consecutive assessment years. The deduction applies to profits of the qualifying undertaking or enterprise, not gross receipts or the whole income of the taxpayer.

Under section 80-IA(2), the claimant generally could choose ten consecutive years within a fifteen-year window starting from the relevant commencement year. For specified infrastructure facilities, the selection window was twenty years. Once the ten-year claim period begins, it runs consecutively.

Businesses covered by section 80-IA(4)

CategoryPrincipal statutory scope and timing
Infrastructure facilities - clause (i)Qualifying development, operation and maintenance of new infrastructure facilities under prescribed government or statutory agreements; includes specified roads, bridges, rail systems, highway projects, water supply and treatment, irrigation, sanitation, sewerage, solid waste, ports, airports and inland waterways.
Telecommunications - clause (ii)Specified basic/cellular, paging, domestic satellite, trunking, broadband and internet services commenced from 1 April 1995 through 31 March 2005.
Industrial parks - clause (iii)Eligible parks developed or operated under the notified scheme and within the relevant statutory period, including the historical extension through 31 March 2011 for industrial parks.
Power - clause (iv)Eligible generation or generation-and-distribution projects, new transmission/distribution networks, or substantial renovation and modernisation, each subject to its own commencement period and statutory conditions.
Revival of power plants - clause (v)Narrow relief for specified notified Indian companies established for reconstruction or revival of power-generating plants, subject to the special deadlines.

Important: Many sector-specific entry deadlines have expired. A business commencing operations now does not automatically become eligible. Existing qualifying projects may still require examination of the applicable claim window, tax year and transition provisions.

Infrastructure facilities: ownership, agreements and definitions

Under section 80-IA(4)(i), an eligible enterprise generally had to be owned by an Indian company or qualifying consortium, or a permitted statutory authority, board, corporation or body; have an agreement with the Central Government, a State Government, local authority or statutory body; and satisfy the statutory operation-and-maintenance commencement condition. A qualifying transfer of an infrastructure facility to another operator could allow the transferee the remaining deduction period, subject to the statute.

The statutory definition of infrastructure facility included roads and toll roads, bridges, rail systems, highway projects (with integral housing or other activities), water supply and treatment, irrigation, sanitation and sewerage, solid waste management, ports, airports, inland waterways, inland ports and sea navigational channels. Classification must follow the wording applicable to the relevant year.

Special deduction rate for telecommunications

Section 80-IA(2A) prescribed a different pattern for eligible telecommunications undertakings: 100% of eligible profits for the first five assessment years and 30% for the next five, within the prescribed election period. This should not be confused with the ordinary ten-year 100% rule for other eligible categories.

Power projects and historical commencement limits

The original framework addressed (a) generation or generation and distribution of power; (b) transmission or distribution through a newly laid network; and (c) substantial renovation and modernisation of existing transmission or distribution lines. The old article lists a 31 March 2013 endpoint, but subsequent legislative amendments extended certain power-sector commencement deadlines, including to 31 March 2017. The exact applicable endpoint depends on the activity and legislative version for the relevant year.

For renovation and modernisation, the historical definition generally required an increase of at least 50% in the book value of relevant plant and machinery measured against the statutory base date. Profits from new transmission or distribution networks were subject to their own restriction to the eligible network activity.

Key conditions, restrictions and anti-abuse provisions

  1. New undertaking tests - subsection (3): For applicable telecom and power undertakings, the business generally must not result from splitting or reconstructing an existing business or transferring previously used plant and machinery, subject to exceptions. The statute included a 20% tolerance for certain used machinery.
  2. Separate eligible-business computation - subsection (5): The eligible business is treated as the sole source of income for the specified deduction computation period, including relevant losses and depreciation.
  3. Accounts and audit - subsection (7): Eligible accounts must be audited and the prescribed report furnished in accordance with the requirements applicable to the claim year.
  4. Transfers at market value - subsection (8): Goods or services transferred between eligible and other businesses must be valued under the statutory market-value or arm's-length rules, where applicable.
  5. No duplicate deductions - subsection (9): The same profits cannot support another deduction under the relevant Chapter VI-A income-deduction heading.
  6. Excessive profits - subsection (10): The Assessing Officer may adjust artificially inflated profits resulting from arrangements with connected parties, subject to applicable transfer-pricing provisions.
  7. Amalgamation and demerger - subsections (12) and (12A): Special continuity rules and their limitations apply; transfers on or after 1 April 2007 are subject to the statutory exclusion in subsection (12A).
  8. SEZ exclusion - subsection (13): SEZs notified on or after 1 April 2005 are not covered under the former SEZ route in section 80-IA; see section 80-IAB.
  9. Works-contract exclusion: A business merely executing an awarded works contract is excluded by the explanation to section 80-IA, even where the contract relates to infrastructure.

Return filing and documentation

Section 80AC imposes a return-filing condition on specified profit-linked deductions. For a historical claim, verify the due date, audit-report filing method, prescribed form (including Form 10CCB where applicable), books of account, project approval, commissioning records, and any government agreement. A late or incomplete filing can affect admissibility.

Illustrative calculation

Example: An eligible infrastructure undertaking has correctly computed eligible profits of Rs. 80 lakh for one of its qualifying ten consecutive years. At the historical 100% rate, the potential section 80-IA deduction is Rs. 80 lakh, subject to the eligible-business computation, Chapter VI-A limits, filing conditions and the legislation for that assessment year. This does not establish eligibility for a newly commissioned 2026 project.

Section 80-I was a separate historical industrial-undertaking incentive. Section 80-IB governed certain other industrial undertakings. Section 80-IAB concerned qualifying SEZ developers. These provisions have different conditions and should not be treated as interchangeable.

Official legislation and tax resources

Frequently asked questions

What is the Section 80-IA deduction?

Section 80-IA of the Income-tax Act, 1961 provided a profit-linked tax deduction for eligible infrastructure, power, telecom and certain industrial park businesses, subject to sector-specific commencement dates and other conditions.

How long can an eligible infrastructure business claim the deduction?

The standard deduction is 100 percent of eligible profits for ten consecutive assessment years, generally selected within a fifteen-year period; certain infrastructure facilities have a twenty-year selection window.

Does Section 80-IA apply to ordinary works contracts?

No. The statutory explanation excludes a business in the nature of a works contract awarded by any person and executed by the undertaking or enterprise.

Can new power projects starting in 2026 claim Section 80-IA?

The historical power-sector commencement deadlines have passed. A new project cannot assume eligibility merely because it generates power; existing eligible projects and transition rules require separate examination.

Is a timely tax return necessary?

Section 80AC and the applicable filing and audit rules may restrict a claim when the return or prescribed report is not furnished as required.

For historical assessments and current transitional questions, use the enacted law, amendments, notifications and judicial interpretations applicable to the particular tax year.