Section 80-I of the Income Tax Act: Historical Deduction for Industrial Undertakings

Section 80-I was a Chapter VI-A incentive provision for specified profits derived from qualifying industrial undertakings, ships, hotels and, for a limited period, businesses repairing ocean-going vessels or other powered craft. It is important today mainly for historical tax years, legacy proceedings and legal research.

What did Section 80-I provide?

Historically, Section 80-I allowed a deduction from qualifying profits and gains included in the gross total income of an assessee. The provision applied only when the relevant undertaking or business satisfied the statutory conditions and fell within the prescribed commencement periods.

The old section covered four principal categories: industrial undertakings, qualifying ships, qualifying hotel businesses and specified businesses carrying out repairs to ocean-going vessels or other powered craft.

Historical deduction rates under Section 80-I

These rates describe the historical provision and should not be read as rates available for a fresh claim under current law.

Conditions for an industrial undertaking

Section 80-I(2) laid down cumulative conditions for an industrial undertaking. In substance, the undertaking had to satisfy the following requirements:

• It was not to be formed by splitting up or reconstructing a business already in existence, subject to the statutory exception for qualifying revival or reconstruction covered by section 33B.
• It was generally not to be formed by transferring previously used machinery or plant to the new business.
• It had to manufacture or produce an eligible article or thing, or operate one or more cold-storage plants, within the commencement period specified by the section.
• A manufacturing undertaking ordinarily had to employ at least 10 workers where the manufacturing process was carried on with power, or at least 20 workers where it was carried on without power.

Imported machinery and previously used plant

Machinery or plant used outside India by another person was not automatically treated as previously used machinery if the statutory conditions were met: it had not previously been used in India, it was imported into India, and depreciation under the Act had not been allowed or allowable to any person for a period before its installation by the assessee.

The section also contained a tolerance rule under which transfer of previously used machinery or plant did not breach the condition if the value transferred did not exceed 20% of the total value of machinery or plant used in the business.

Small-scale industrial undertakings

The historical provision relaxed the Eleventh Schedule restriction for a qualifying small-scale industrial undertaking. The expression was linked to the definition then contained in section 80HHA.

Ships, hotels and vessel-repair businesses

Ships

Section 80-I(3) applied to a ship only if the statutory ownership and use conditions were met. Broadly, the ship had to be owned by an Indian company, wholly used for its business, not previously owned or used in Indian territorial waters by a resident in India, and brought into use within the period prescribed by the section.

Hotels

Under section 80-I(4), the hotel business had to satisfy conditions concerning reconstruction, transfer of an existing hotel building or used plant, Indian company ownership, minimum paid-up capital, Central Government approval and the prescribed commencement period.

Repairs to ocean-going vessels or other powered craft

Section 80-I(4A) extended the historical incentive to an Indian company carrying on a qualifying vessel-repair business. The business was required to satisfy restrictions concerning reconstruction and used machinery, commence repair work within the statutory period, and obtain the prescribed Central Government approval.

How long was the deduction available?

Section 80-I(5) linked the deduction period to the initial assessment year, meaning the assessment year relevant to the previous year in which the qualifying activity first commenced. The general rule extended the deduction to the initial assessment year and the seven immediately succeeding assessment years.

The section contained longer or shorter periods for particular cases. A co-operative society received a longer period; vessel-repair businesses had a shorter period; and special rules applied to specified undertakings, ships and hotels commencing during the 1 April 1990 to 31 March 1991 window.

Computation, audit and anti-inflation rules

Eligible business treated as the only source

For later years in the deduction period, section 80-I(6) required qualifying profits to be computed as if the eligible undertaking, ship, hotel or vessel-repair business were the assessee's only source of income for the relevant statutory period. This was a special computation rule for determining the deduction.

Audit requirement

Section 80-I(7) required an assessee other than a company or co-operative society to obtain an audit of the industrial undertaking's accounts and furnish the prescribed audit report when claiming the deduction, subject to the procedural law applicable to the relevant year.

Transfers between the eligible business and another business

Section 80-I(8) addressed internal transfers of goods. If the recorded consideration did not correspond to market value, qualifying profits were to be recomputed by reference to market value. The Assessing Officer could use a reasonable basis where the statutory method created exceptional difficulties.

Close connections and excessive profits

Section 80-I(9) empowered the Assessing Officer to adjust profits where a close connection or business arrangement produced more than the ordinary profits reasonably expected from the qualifying business.

Power to exclude a class of undertakings

Section 80-I(10) empowered the Central Government, after inquiry, to direct by notification that the exemption would not apply to a specified class of industrial undertakings from the date stated in the notification.

Section 80-I and the current income-tax law

The Income-tax Act, 2025 replaced the Income-tax Act, 1961 with effect from 1 April 2026. The official section-mapping material treats old Section 80-I as an omitted provision rather than assigning it a corresponding section in the 2025 Act. Accordingly, this page should be used for historical and transitional reference, not as a guide to a new deduction claim for Tax Year 2026-27 or later.

For businesses researching incentives that survived into later law, the relevant provision depends on the activity and the tax year. Under the former 1961 Act, related provisions included Section 80-IA for specified infrastructure and other eligible businesses and other specialised provisions in Part C of Chapter VI-A.

Official references

• Income Tax Department - historical Section 80-I
• Income Tax Department - Income-tax Act, 2025 and transition resources
• Income Tax e-Filing - Income Tax Act 2025 guidance

Updated: 28 September 2026. This article is intended for legal and tax information. For a live claim or pending proceeding, verify the provision applicable to the relevant tax year and the current official text.