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Income Tax Act, 1961 | Historical provision

Section 34A: Restriction on Unabsorbed Depreciation and Investment Allowance

Section 34A introduced a one-time restriction for assessment year 1992-93 on the use of certain brought-forward depreciation and investment allowances by domestic companies. It also specified how the deferred balance would be treated in later years.

Current legal position: The two-thirds limitation was expressly tied to assessment year 1992-93; it is not a recurring limitation on deductions for 2026-27. Historical claims should be assessed under the law applicable to the relevant year. The Income-tax Act, 2025 governs the new framework from 1 April 2026, subject to its transitional provisions.

Meaning and scope of Section 34A

Unabsorbed depreciation is depreciation that could not be fully deducted because available taxable business income was insufficient. Unabsorbed investment allowance is an eligible investment allowance that could not be fully set off in the year it arose. A domestic company is a company falling within the statutory definition applicable to the relevant assessment year.

Section 34A applied where a domestic company sought, in assessment year 1992-93, to give effect to unabsorbed depreciation or investment allowance originating from assessment years 1991-92 or earlier.

Two-thirds deduction and treatment of the balance

ProvisionRule for assessment year 1992-93
Section 34A(1)Deduction restricted to two-thirds of qualifying brought-forward allowances.
Section 34A(1)(a)Remaining depreciation added to the depreciation allowance for assessment year 1993-94, with treatment as part of that allowance for succeeding years.
Section 34A(1)(b)Remaining investment allowance carried forward to assessment year 1993-94; the eight-year limit could be extended for the deferred portion until absorption.
Section 34A(3)No restriction where the relevant allowance or combined allowances were less than Rs 1 lakh.
Section 34A(4)Limited relief from Sections 234B and 234C interest where specified tax shortfall was paid before filing the return under Section 139(1).

Illustrative calculation

Suppose a qualifying domestic company had Rs 3,00,000 of relevant brought-forward allowances for assessment year 1992-93. Subject to the statutory exception and other applicable rules, Section 34A restricted the amount considered for deduction to Rs 2,00,000 (two-thirds). The remaining Rs 1,00,000 was deferred and treated under the separate depreciation or investment-allowance rules. This illustration does not assume the company had sufficient income to absorb the permitted deduction.

Section 32(2) of the 1961 Act addressed carry-forward of unabsorbed depreciation; Section 32A(3) addressed carry-forward of investment allowance. Section 34A(2) preserved their application for assessment year 1992-93 to the extent they were consistent with Section 34A. Sections 234B and 234C concerned interest for defaults or deferment in advance-tax payment, while Section 139(1) concerned the due date for filing returns.

For current-period depreciation and carry-forward issues, consult the applicable provisions of the Income Tax Department and the official legislative texts available through India Code. Do not apply this historical 1992-93 rule to current-year computations without a specific legal basis.

Practical relevance for legacy cases

For reassessment, appeal, rectification or old-company tax records, verify the original year of the allowance, the assessment year in which the set-off was claimed, the Rs 1 lakh threshold, the split between depreciation and investment allowance, and any applicable advance-tax payment evidence. The exact statutory version and judicial interpretation for the disputed period remain important.

Frequently asked questions

Is Section 34A a current annual restriction?

No. The provision expressly applied its two-thirds limitation to assessment year 1992-93. It is relevant primarily to historical assessments and legacy disputes.

What happened to the remaining one-third of depreciation?

Section 34A(1)(a) added the balance to depreciation for assessment year 1993-94 and treated it as part of that allowance, with subsequent carry-forward under the applicable law.

Did Section 34A apply to every domestic company?

No. Under Section 34A(3), the restriction did not apply where the relevant unabsorbed allowance or combined allowances were less than Rs 1 lakh.

Was there protection from advance-tax interest?

Section 34A(4) provided a limited exception from interest under Sections 234B and 234C for shortfall attributable to this restriction, subject to payment before furnishing the return under Section 139(1).

Original Section 34A text and amendment note

The following historical statutory material is retained from the original webpage for reference. It should be read with subsequent amendments and the law applicable to the assessment year concerned.

Read historical Section 34A wording and legislative note

1(1) In computing the profits and gains of the business of a domestic company in relation to the previous year relevant to the assessment year commencing on the 1st day of April, 1992, where effect is to be given to the unabsorbed depreciation allowance or unabsorbed investment allowance or both in relation to any previous year relevant to the assessment year commencing on or before the 1st day of April, 1991, the deduction shall be restricted to two-third of such allowance or allowances and the balance,-

(a) where it relates to depreciation allowance, be added to the depreciation allowance for the previous year relevant to the assessment year commencing on the 1st day of April, 1993 and be deemed to be part of that allowance or if there is no such allowance for that previous year, be deemed to be the allowance for that previous year and so on for the succeeding previous years;

(b) where it relates to investment allowance, be carried forward to the assessment year commencing on the 1st day of April, 1993 and the balance of the investment allowance, if any, still outstanding shall be carried forward to the following assessment year and where the period of eight years has expired before the portion of such balance is adjusted, the said period shall be extended beyond eight years till such time the portion of the said balance is absorbed in the profits and gains of the business of the domestic company.

(2) For the assessment year commencing on the 1st day of April, 1992, the provisions of sub-section (2) of section 32 and sub-section (3) of section 32Ashall apply to the extent such provisions are not inconsistent with the provisions of sub-section (1) of this section.

(3) Nothing contained in sub-section (1) shall apply where the amount of unabsorbed depreciation allowance or of the unabsorbed investment allowance, as the case may be, or the aggregate amount of such allowances in the case of a domestic company is less than one lakh rupees.

(4) Nothing contained in sections 234B and 234Cshall apply to any shortfall in the payment of any tax due on the assessed tax or, as the case may be, returned income where such shortfall is on account of restricting the amount of depreciation allowance or investment allowance under this section and the assessee has paid the amount of shortfall before furnishing the return of income under sub-section (1) of section 139.
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1. Ins. by Act 18 of 1992, s. 13 (w.e.f. 1-4-1992).

Official legal references

India Code - central legislation database | Income Tax Department - legislation and tax resources | Income Tax e-Filing portal

Information is general legal education and does not replace advice for a specific assessment, litigation or transaction.