Section 14A disallowance, meter replacement, and section 80IA allocation were all resolved in the assessee's favour.

Rule 8D disallowance under section 14A was confined to investments that actually yielded exempt income, and no interest disallowance was justified where the assessee's own funds exceeded tax-free investments. Replacement of meters was treated as revenue expenditure because it only improved business efficiency without creating an enduring asset. Head office expenses were not allocated to the eligible unit for section 80IA where no direct nexus was shown, and deduction under section 80IA was not restricted to gross total income in the manner urged by the Revenue. No further addition under section 14A was permissible in computing book profit under section 115JB, and the estimated disallowance for inflated coal expenses was deleted as unsupported by sustainable adverse material.

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Issues: (i) Whether disallowance under section 14A read with Rule 8D could be restricted to investments that had actually yielded exempt income and whether interest disallowance was impermissible where the assessee had sufficient surplus funds; (ii) whether expenditure on replacement of meters was revenue expenditure; (iii) whether head office expenses could be allocated while computing deduction under section 80IA; (iv) whether deduction under section 80IA was to be confined to business income instead of gross total income; (v) whether any addition under section 14A was warranted while computing book profit under section 115JB; and (vi) whether the estimated disallowance on account of inflated coal expenses was sustainable.

Issue (i): Whether disallowance under section 14A read with Rule 8D could be restricted to investments that had actually yielded exempt income and whether interest disallowance was impermissible where the assessee had sufficient surplus funds.

Analysis: The assessee had substantial interest-free funds far exceeding the value of tax-free investments, so the presumption operated that investments were made out of own funds and no interest disallowance was warranted. The disallowance under Rule 8D was also to be computed only with reference to those investments which had yielded exempt income during the year, following the binding line of precedent relied upon in the record.

Conclusion: The restriction adopted by the first appellate authority was upheld and the Revenue's challenge failed.

Issue (ii): Whether expenditure on replacement of meters was revenue expenditure.

Analysis: Replacement of meters only facilitated the efficient conduct of the business and improved meter reading; it did not increase generation capacity, distribution capacity, or any enduring capital asset. The expenditure had consistently been treated in earlier years as revenue in the assessee's own case.

Conclusion: The expenditure was held to be revenue expenditure and the Revenue's objection was rejected.

Issue (iii): Whether head office expenses could be allocated while computing deduction under section 80IA.

Analysis: The eligible undertaking had to be assessed as if it were the only source of income, and deduction under section 80IA was confined to profits derived from the eligible business. On the facts, the head office expenses lacked the direct and immediate nexus required for allocation to the eligible unit.

Conclusion: Allocation of head office expenses was disallowed and the assessee's claim was sustained.

Issue (iv): Whether deduction under section 80IA was to be confined to business income instead of gross total income.

Analysis: The question had already been settled in the assessee's favour by earlier binding decisions, and the deduction was not to be restricted in the manner suggested by the Revenue.

Conclusion: The contention of the Revenue was rejected and the assessee's position was accepted.

Issue (v): Whether any addition under section 14A was warranted while computing book profit under section 115JB.

Analysis: The computation of disallowance under Rule 8D could not be bodily imported into the book-profit mechanism under section 115JB. The issue stood covered by prior decisions in the assessee's own case and by the Special Bench view relied upon.

Conclusion: No further addition under section 14A was permissible while computing book profit and the Revenue's ground failed.

Issue (vi): Whether the estimated disallowance on account of inflated coal expenses was sustainable.

Analysis: The adjustment was founded only on investigative material and estimations for earlier years, without a final adjudication against the assessee for the year in question. The coal cost formed part of the tariff mechanism and had already entered the revenue computation through tariff receipts. In these circumstances, the estimated addition lacked a sustainable basis.

Conclusion: The disallowance on account of inflated coal expenses was deleted in full.

Final Conclusion: The common order granted complete relief to the assessee on the disputed substantive additions and left no surviving tax adjustment against it.

Ratio Decidendi: For section 14A, interest disallowance is not justified where own funds exceed investments and Rule 8D computation is to be confined to investments that actually yielded exempt income; further, estimated additions unsupported by final adverse material and duplicating tariff-based recovery cannot be sustained.

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