Income Tax Act, 1961 - Business deductions

Section 32A of Income Tax Act: Investment Allowance

Section 32A contains the former investment allowance scheme for specified ships, aircraft, machinery and plant used for business. The provision remains relevant mainly for understanding historical assessments, carried-forward matters and older tax disputes.

Present legal position: Investment allowance under Section 32A is not a deduction for new investment made today. Under the Central Government notification issued under Section 32A(8), no investment allowance is available for a new ship or aircraft acquired, or new machinery or plant installed, after 31 March 1990. The section should therefore be read as a historical provision where an older assessment year or legacy claim is involved.

On this pageMeaning and scope Rate and eligible assets Excluded assets Carry forward Investment Allowance Reserve Withdrawal of allowance Special provisions Current relevance

What is investment allowance under Section 32A?

Section 32A was an incentive for capital investment by businesses. Subject to the conditions in the section, an assessee owning and wholly using specified assets for business could claim an investment allowance calculated on the asset's actual cost. The allowance was linked to the year of acquisition or installation, or the immediately succeeding previous year where the asset was first put to use in that later year.

For Section 32A, actual cost was the actual cost of the ship, aircraft, machinery or plant to the assessee, subject to the statutory adjustment stated in the Explanation to sub-section (1).

Rate and assets covered

General rate	25% of actual cost under Section 32A(1), subject to the section's conditions.
Transitional assets under Section 32A(8B)	20% in the cases covered by that sub-section.
Certain technology or know-how cases	Section 32A(2B) historically provided a 35% rate where its detailed conditions were met.
Certain pollution-control or environmental machinery	Section 32A(2C) historically provided a 35% rate for notified machinery or plant installed during the specified period.

Broadly, Section 32A(2) dealt with specified new ships and aircraft and specified new machinery or plant used in qualifying businesses, including generation or distribution of power and manufacture or production. The exact eligibility depended on the acquisition or installation date and the statutory conditions applicable to the relevant assessment year.

Assets for which deduction was excluded

The second proviso to Section 32A(1) excluded, among other things, machinery or plant installed in office premises or residential accommodation including a guest house, office appliances, road transport vehicles, assets qualifying for development rebate under Section 33, and machinery or plant whose whole actual cost was otherwise allowed as a deduction in computing business income for one previous year.

Carry forward of unabsorbed investment allowance

Section 32A(3) dealt with cases where total income was nil or insufficient to absorb the full investment allowance. The allowable amount could reduce the relevant total income to nil and the unabsorbed balance could, subject to the statutory ordering rules, be carried forward. The section imposed an eight-assessment-year limit for such carry forward.

Investment Allowance Reserve Account

Section 32A(4) imposed important conditions for claiming the allowance. The prescribed particulars had to be furnished and, in the cases governed by the reserve requirement, an amount equal to 75% of the investment allowance actually allowed had to be debited to the profit and loss account and credited to an Investment Allowance Reserve Account. For a ship, the proviso substituted 50% for 75%.

The reserve was subject to restrictions on its use. It was intended to support acquisition of qualifying new business assets within the statutory period and, until then, had to remain deployed for permitted business purposes rather than dividend or profit distribution, remittance of profits outside India, or creation of assets outside India.

When could the allowance be treated as wrongly allowed?

Section 32A(5), read with the applicable provisions of Section 155, provided for withdrawal or adjustment where specified conditions were breached. These included certain transfers of the qualifying asset within the stipulated period, failure to use the reserve for acquisition of qualifying assets within the prescribed period, or prohibited use of the reserve. The section also contained exceptions for specified transfers, including certain transfers to government bodies and qualifying amalgamation or succession cases.

Amalgamation, succession and transitional provisions

Sections 32A(6) and 32A(7) addressed continuity of conditions and outstanding allowance in specified cases of amalgamation and succession of a firm by a company. Sections 32A(8), 32A(8A), 32A(8B) and 32A(8C) contained powers and transitional rules governing the phase-out of the allowance and its interaction with Section 32AB.

Is Section 32A available for current investment?

No, not for a new asset acquired or installed today. The historical cut-off recorded in the official Income Tax material is 31 March 1990. A present-day reader should therefore not treat the old 20%, 25% or 35% figures in Section 32A as a current tax incentive for purchasing machinery or plant.

Section 32A can still matter when reading old assessment records, litigation concerning historical years, statutory cross-references or questions involving an allowance that arose under the former regime. For a current transaction, the deductions and incentives applicable to the relevant assessment year should be checked separately.

Practical note: Tax provisions are assessment-year specific. Where a dispute concerns an old asset or old assessment year, verify the version of the Income Tax Act and applicable notifications for that period before relying on the present consolidated text.

Related Income Tax provisions

Last reviewed: 27 September 2026. This page explains the provision for general legal and tax information and does not replace professional advice for a particular assessment year or transaction.