Strict construction of tax disallowance provisions barred retrospective application to contractor payments made before the effective date.

Section 40(a)(ia) of the Income-tax Act, inserted by the Finance (No. 2) Act, 2004 and made effective from 1 April 2005, was held inapplicable to a contractor payment made during financial year 2004-05. The analysis turned on the operative date of the disallowance provision: a taxing amendment that creates a burden is construed strictly, and ambiguity is resolved in favour of the assessee. Section 4 of the Income-tax Act did not alter that result. Accordingly, the disallowance could not be applied to the earlier year's payment.

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Issues: Whether Section 40(a)(ia) of the Income-tax Act, 1961 could be applied to disallow a contractor payment made during the previous year relevant to assessment year 2005-06, where the provision was inserted by the Finance (No. 2) Act, 2004 and made effective from 1 April 2005.

Analysis: The operative question was the date from which the disallowance provision took effect. Section 11 of the Finance (No. 2) Act, 2004 inserted clause (ia) in Section 40 and made it effective from 1 April 2005. The payment in question related to the financial year 2004-05, when the assessee could not be treated as having foreseen the new disallowance consequence. Fiscal legislation that creates a disallowance or burden is construed strictly, and any ambiguity is resolved in favour of the assessee. Section 4 of the Income-tax Act, 1961, dealing with charge and deduction of tax, did not alter that result.

Conclusion: Section 40(a)(ia) could not be applied to the payment made during financial year 2004-05. The question was answered in favour of the assessee.

Ratio Decidendi: A disallowance provision introduced by a taxing amendment operates only from its stated effective date, and where its application would impose a burden for an earlier period, strict construction requires that ambiguity be resolved in favour of the assessee.

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