Retrospective clarificatory amendment to interest provisions upheld; assessed income governs levy under income-tax interest sections.

Interest under sections 234A and 234B of the Income-tax Act is stated to be chargeable with reference to assessed income, because the provisions link interest to tax on total income determined on assessment after reduction of advance tax and tax deducted at source. The Finance Act, 2001 amendments were treated as clarificatory, removing doubt about the earlier basis rather than creating a new levy. On that footing, retrospective operation from 1 April 1989 was held constitutionally permissible, as the amendment was viewed as reasonable and not arbitrary, discriminatory, or confiscatory.

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Issues: (i) Whether interest under sections 234A and 234B of the Income-tax Act, 1961 could be levied with reference to assessed income and not merely returned income. (ii) Whether the retrospective amendments made by the Finance Act, 2001 to sections 234A and 234B, with effect from 1 April 1989, were constitutionally valid.

Issue (i): Whether interest under sections 234A and 234B of the Income-tax Act, 1961 could be levied with reference to assessed income and not merely returned income.

Analysis: The main charging language of section 234A linked interest to the tax on total income determined under section 143(1) or on regular assessment, reduced by advance tax and tax deducted or collected at source. Section 234B likewise referred to assessed tax as tax on total income determined under section 143(1) or on regular assessment. The impugned amendment was treated as clarificatory of that basis and as removing doubt created by the earlier explanation. The Court accepted that, even before the amendment, the departmental understanding and practical application were tied to assessed income.

Conclusion: Yes. Interest under sections 234A and 234B could validly be levied with reference to assessed income.

Issue (ii): Whether the retrospective amendments made by the Finance Act, 2001 to sections 234A and 234B, with effect from 1 April 1989, were constitutionally valid.

Analysis: The amendments were held to be explanatory and clarificatory, intended to remove doubt rather than to create a new levy or overturn binding law. Retrospectivity was tested on the principles of reasonableness, absence of discriminatory or confiscatory effect, and absence of undue unforeseen financial burden. The Court found no arbitrariness or oppression, noted that interest could in appropriate cases be waived or reduced, and relied on the view that a retrospective clarification is permissible where it merely changes the basis of the earlier understanding of the provision.

Conclusion: Yes. The retrospective amendments were constitutionally valid.

Final Conclusion: The challenge to the levy of interest and to the retrospective amendment failed, and the petitions were dismissed.

Ratio Decidendi: A retrospective amendment that is clarificatory and removes doubt, without imposing an arbitrary or confiscatory burden, is valid, and interest provisions expressly tied to assessed tax may be applied with reference to assessed income.

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