Deduction base under section 36(1)(viii) construed to exclude both Chapter VI-A relief and the same clause's deduction.

Section 36(1)(viii) was interpreted to require the deduction to be computed on 25 per cent of total income after excluding both Chapter VI-A deductions and the deduction under section 36(1)(viii) itself, because the statutory context and the phrase in section 2 allowed "total income" to be read accordingly. The later 1985 amendment inserting "and this clause" was treated as confirming that construction for earlier assessment years. The result was that the deduction base was narrower than a reading limited only by Chapter VI-A deductions.

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Issues: Whether the deduction under section 36(1)(viii) of the Income-tax Act, 1961 for the relevant assessment years had to be computed on 25 per cent of the total income before deduction under Chapter VI-A alone, or on the total income before deduction both under Chapter VI-A and under section 36(1)(viii) itself.

Analysis: The expression used in the unamended provision was construed in the light of the statutory context and the definition of total income, with emphasis on the phrase "unless the context otherwise requires" in section 2 of the Act. The Court preferred the reasoning of several High Courts that the context of section 36(1)(viii) required the deduction base to be read as total income after excluding the deduction under the very clause in question as well as deductions under Chapter VI-A. The subsequent 1985 amendment, which expressly inserted the words "and this clause", was treated as supportive of that interpretation for the earlier years.

Conclusion: The deduction under section 36(1)(viii) for the assessment years in question had to be computed on 25 per cent of the total income before making any deduction under Chapter VI-A and before making any deduction under section 36(1)(viii) itself, and the answer was against the Revenue.

Ratio Decidendi: Where the statutory context so requires, the expression "total income" in a deduction provision may be construed to exclude the deduction under that very provision as well as other linked deductions, even before an express amendment clarifies the position.

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