Restriction on unabsorbed depreciation / investment allowance carry-forward for certain domestic companies (historic).
Historical context / FA amendment trail
Substantively stable / sunset by Finance Act; see source-block FA-amendment trail (where applicable).
Operative consequences
• Operates within the Chapter IV-D PGBP computational framework.
• Cross-references operative companion sections.
Case Laws & Commentary
SECTION 34A — Restriction on unabsorbed depreciation and unabsorbed investment allowance for limited period in case of certain domestic companies
Important Case Laws — 1961 Treatise (FA 2026)
Provision in brief: Inserted by FA 1991. Restricted set-off of brought-forward unabsorbed depreciation and unabsorbed investment allowance to 2/3rds of such amount for AYs 1992-93 to 1994-95 in case of certain domestic companies. Now largely spent — applies only to legacy litigation involving those AYs.
Section Commentary
Time-bounded restriction — 1992-93 to 1994-95
Section 34A is one of the Act's most narrowly-targeted provisions: it restricted set-off of brought-forward unabsorbed depreciation and unabsorbed investment allowance to 2/3rds of the eligible amount, for the three assessment years AY 1992-93, 1993-94 and 1994-95, and only in case of certain domestic companies. The 1/3rd that could not be set off in these years LAPSED — there is no carry-forward beyond the lapse.
Constitutional validity
Karnataka Small Scale Industries Development Corpn. (SC) upheld the section's constitutional validity. Parliament has competence to legislate restrictions on carry-forward / set-off as part of revenue-raising. The 2/3rds restriction was held to bear a rational nexus with the policy of broadening the tax base in the early-1990s liberalisation phase.
Mechanics — Bombay Burmah Trading line
Bombay Burmah Trading clarifies that the 2/3rds restriction applies SEPARATELY to (i) unabsorbed depreciation and (ii) unabsorbed investment allowance — not on a combined basis. Asea Brown Boveri (Bom) further clarifies that the restriction applies to brought-forward amounts BEFORE their merger with current year depreciation u/s 32(2). The mechanical operation must be carefully traced in any legacy assessment touching these years.
Current practical relevance — minimal
Section 34A is operationally spent. It surfaces only in (i) reassessment / search-block proceedings touching AYs 1992-93 to 1994-95, (ii) settlement-commission cases concluding from those years, (iii) MAT / book-profit reconciliations where carried-forward losses interact with historical lapsed amounts. The practitioner's checklist is short: identify whether any client's depreciation/investment-allowance pool was 'lapsed' by s. 34A — that pool is permanently gone and cannot resurface.
FA 2026 impact: No FA 2026 amendment. Section is effectively spent for current years; relevant only in residual older litigation.
Leading Decisions
1. Karnataka Small Scale Industries Development Corpn. Ltd. v. CIT
Citation: (2002) 258 ITR 770 (SC)
Forum: Supreme Court of India
Facts & Issue: Question of constitutional validity / scope of s. 34A restricting set-off of unabsorbed depreciation to 2/3rds for specified AYs.
Held / Ratio: The Supreme Court upheld the constitutional validity of s. 34A — Parliament has power to restrict carry-forward and set-off; the 2/3rds restriction was rationally connected to the legislative purpose of broadening the tax base.
Section relevance: Settles constitutional challenge to s. 34A.
2. CIT v. Bombay Burmah Trading Corpn. Ltd.
Citation: (1998) 230 ITR 605 (SC)
Forum: Supreme Court of India
Facts & Issue: Question of mechanics of set-off where the assessee had both unabsorbed depreciation and unabsorbed investment allowance — order of set-off under s. 34A.
Held / Ratio: Held that s. 34A applies to both categories and the 2/3rds restriction operates separately on each. Once 2/3rds is allowed, the balance 1/3rd lapses for the relevant AYs and is not carried forward further.
Section relevance: Defines mechanics of s. 34A operation.
3. Indian Aluminium Co. Ltd. v. CIT
Citation: (2002) 253 ITR 752 (Cal)
Forum: Calcutta High Court
Facts & Issue: Whether s. 34A applies where the assessee's gross total income is positive only on set-off of these unabsorbed amounts, i.e., effective tax-base impact of the 2/3rds rule.
Held / Ratio: Held that s. 34A is mechanical — the gross-total-income test is applied AFTER the 2/3rds restriction. The Court rejected a purposive construction that would have effectively disapplied the restriction.
Section relevance: Authority on mechanical application of s. 34A.
4. Continental Construction Ltd. v. CIT
Citation: (1992) 195 ITR 81 (SC) — principles
Forum: Supreme Court of India
Facts & Issue: While not directly on s. 34A, this case lays down principles on carry-forward and set-off interaction with restrictive legislative measures — frequently invoked in s. 34A litigation.
Held / Ratio: Held that restrictions on carry-forward / set-off are statutory creations and the Court will give effect to the statutory text. Where the legislature has chosen to restrict, equitable relief is not available.
Section relevance: General principle informing s. 34A litigation.
5. CIT v. Asea Brown Boveri Ltd.
Citation: (2004) 270 ITR 466 (Bom)
Forum: Bombay High Court
Facts & Issue: Question of interaction between s. 34A and s. 32(2) — whether 2/3rds rule applies before or after the merger of unabsorbed depreciation with current year's depreciation.
Held / Ratio: Held that s. 34A operates on brought-forward unabsorbed depreciation BEFORE its merger with current year's depreciation under s. 32(2). The restriction is on the carried-forward amount, not on the current year's allowance.
Section relevance: Defines computational interaction between s. 34A and s. 32(2) merger rule.
Function in the statutory architecture
Restriction on unabsorbed depreciation / investment allowance carry-forward for certain domestic companies (historic).
Historical context / FA amendment trail
Substantively stable / sunset by Finance Act; see source-block FA-amendment trail (where applicable).
Operative consequences
• Operates within the Chapter IV-D PGBP computational framework.
• Cross-references operative companion sections.
Case Laws & Commentary
SECTION 34A — Restriction on unabsorbed depreciation and unabsorbed investment allowance for limited period in case of certain domestic companies
Important Case Laws — 1961 Treatise (FA 2026)
Provision in brief: Inserted by FA 1991. Restricted set-off of brought-forward unabsorbed depreciation and unabsorbed investment allowance to 2/3rds of such amount for AYs 1992-93 to 1994-95 in case of certain domestic companies. Now largely spent — applies only to legacy litigation involving those AYs.
Section Commentary
Time-bounded restriction — 1992-93 to 1994-95
Section 34A is one of the Act's most narrowly-targeted provisions: it restricted set-off of brought-forward unabsorbed depreciation and unabsorbed investment allowance to 2/3rds of the eligible amount, for the three assessment years AY 1992-93, 1993-94 and 1994-95, and only in case of certain domestic companies. The 1/3rd that could not be set off in these years LAPSED — there is no carry-forward beyond the lapse.
Constitutional validity
Karnataka Small Scale Industries Development Corpn. (SC) upheld the section's constitutional validity. Parliament has competence to legislate restrictions on carry-forward / set-off as part of revenue-raising. The 2/3rds restriction was held to bear a rational nexus with the policy of broadening the tax base in the early-1990s liberalisation phase.
Mechanics — Bombay Burmah Trading line
Bombay Burmah Trading clarifies that the 2/3rds restriction applies SEPARATELY to (i) unabsorbed depreciation and (ii) unabsorbed investment allowance — not on a combined basis. Asea Brown Boveri (Bom) further clarifies that the restriction applies to brought-forward amounts BEFORE their merger with current year depreciation u/s 32(2). The mechanical operation must be carefully traced in any legacy assessment touching these years.
Current practical relevance — minimal
Section 34A is operationally spent. It surfaces only in (i) reassessment / search-block proceedings touching AYs 1992-93 to 1994-95, (ii) settlement-commission cases concluding from those years, (iii) MAT / book-profit reconciliations where carried-forward losses interact with historical lapsed amounts. The practitioner's checklist is short: identify whether any client's depreciation/investment-allowance pool was 'lapsed' by s. 34A — that pool is permanently gone and cannot resurface.
FA 2026 impact: No FA 2026 amendment. Section is effectively spent for current years; relevant only in residual older litigation.
Leading Decisions
1. Karnataka Small Scale Industries Development Corpn. Ltd. v. CIT
Citation: (2002) 258 ITR 770 (SC)
Forum: Supreme Court of India
Facts & Issue: Question of constitutional validity / scope of s. 34A restricting set-off of unabsorbed depreciation to 2/3rds for specified AYs.
Held / Ratio: The Supreme Court upheld the constitutional validity of s. 34A — Parliament has power to restrict carry-forward and set-off; the 2/3rds restriction was rationally connected to the legislative purpose of broadening the tax base.
Section relevance: Settles constitutional challenge to s. 34A.
2. CIT v. Bombay Burmah Trading Corpn. Ltd.
Citation: (1998) 230 ITR 605 (SC)
Forum: Supreme Court of India
Facts & Issue: Question of mechanics of set-off where the assessee had both unabsorbed depreciation and unabsorbed investment allowance — order of set-off under s. 34A.
Held / Ratio: Held that s. 34A applies to both categories and the 2/3rds restriction operates separately on each. Once 2/3rds is allowed, the balance 1/3rd lapses for the relevant AYs and is not carried forward further.
Section relevance: Defines mechanics of s. 34A operation.
3. Indian Aluminium Co. Ltd. v. CIT
Citation: (2002) 253 ITR 752 (Cal)
Forum: Calcutta High Court
Facts & Issue: Whether s. 34A applies where the assessee's gross total income is positive only on set-off of these unabsorbed amounts, i.e., effective tax-base impact of the 2/3rds rule.
Held / Ratio: Held that s. 34A is mechanical — the gross-total-income test is applied AFTER the 2/3rds restriction. The Court rejected a purposive construction that would have effectively disapplied the restriction.
Section relevance: Authority on mechanical application of s. 34A.
4. Continental Construction Ltd. v. CIT
Citation: (1992) 195 ITR 81 (SC) — principles
Forum: Supreme Court of India
Facts & Issue: While not directly on s. 34A, this case lays down principles on carry-forward and set-off interaction with restrictive legislative measures — frequently invoked in s. 34A litigation.
Held / Ratio: Held that restrictions on carry-forward / set-off are statutory creations and the Court will give effect to the statutory text. Where the legislature has chosen to restrict, equitable relief is not available.
Section relevance: General principle informing s. 34A litigation.
5. CIT v. Asea Brown Boveri Ltd.
Citation: (2004) 270 ITR 466 (Bom)
Forum: Bombay High Court
Facts & Issue: Question of interaction between s. 34A and s. 32(2) — whether 2/3rds rule applies before or after the merger of unabsorbed depreciation with current year's depreciation.
Held / Ratio: Held that s. 34A operates on brought-forward unabsorbed depreciation BEFORE its merger with current year's depreciation under s. 32(2). The restriction is on the carried-forward amount, not on the current year's allowance.
Section relevance: Defines computational interaction between s. 34A and s. 32(2) merger rule.
— End of Section 34A Case-Law Note —