State Can Withdraw Electricity Duty Exemption For Captive Power Plants In Public Interest But Must Give One-Year Notice Period: Supreme Court

"The recipient of a concession has no legally enforceable right against the Government to grant of a concession except to enjoy the benefits of the concession during the period of its grant; this right to enjoy is a defeasible one." Supreme Court, in a significant ruling, held that while the State possesses the inherent statutory power to withdraw or modify electricity duty exemptions in the public interest, such power must be exercised with fairness by providing a reasonable transitional notice period.

A bench of Justice Pamidighantam Sri Narasimha and Justice Alok Aradhe observed that industries which have structured their financial and operational frameworks based on a long-standing government concession should not be subjected to abrupt policy reversals that impose immediate fiscal burdens.

The appeals were filed by the State of Maharashtra against High Court orders that quashed notifications dated April 1, 2000, and April 4, 2001, which had withdrawn duty exemptions previously enjoyed by captive power generators. These exemptions were originally granted in 1994 under Section 5A of the Bombay Electricity Duty Act, 1958, to encourage self-sufficiency in power generation. The respondents, including Reliance Industries Ltd., had successfully argued before the High Court that the sudden withdrawal was arbitrary and discriminatory.

The primary legal question before the Court was whether the State, having once granted an exemption to encourage industrial investment, was legally precluded from withdrawing or modifying such exemption. The Court was also called upon to determine whether the doctrines of promissory estoppel and legitimate expectation apply to fiscal policy decisions aimed at revenue augmentation, and whether the sudden withdrawal of a concession violates Article 14 of the Constitution of India.

In its detailed analysis, the Court emphasized that an exemption granted under a fiscal statute is a mere concession and does not create a permanent vested right. The bench noted that an exemption is, by definition, a freedom from an obligation which the exemptee is otherwise liable to discharge, and as such, it remains a privilege rather than a right. The Court clarified that the power to grant an exemption under Section 5A of the Act naturally includes the power to rescind or modify it, provided such action is taken in the public interest. "The right to enjoy the exemption from payment of tax is a defeasible right, as the same can be taken away in exercise of power under which it was granted."

The Court further observed that the augmentation of public revenue and addressing budgetary constraints constitute valid public interest grounds for the withdrawal of tax concessions. The bench held that the State must retain the flexibility to recalibrate its fiscal policies to maintain economic stability, and such decisions should generally be immune from judicial second-guessing unless they are palpably arbitrary. The respondents failed to demonstrate that the State's decision was actuated by extraneous considerations or manifest unfairness in its intent. "The courts do not undertake a detailed evaluation of the wisdom, sufficiency or effectiveness of an economic policy, for such assessment properly belongs to the domain of the Government and the experts advising it."

Addressing the doctrines of promissory estoppel and legitimate expectation, the Court ruled that these cannot be invoked to block a change in policy that is necessitated by supervening public equity. It was noted that any party acting on a notification should be aware that such statutory instruments are liable to be amended or rescinded. The bench found that the decision to modify the exemption was a policy matter within the realm of fiscal administration, and therefore, the State was not bound to maintain the status quo indefinitely. "If a party claiming application of the doctrine acted on the basis of a notification, it should have known that such notification was liable to be amended or rescinded at any point of time."

> "The sudden withdrawal of the exemption without providing a reasonable transitional period to the industries had the effect of placing the captive power generators in a position to immediately bear an additional fiscal burden."

However, the Court introduced a vital caveat regarding the manner in which such powers are exercised, grounding its reasoning in the principles of fairness and Article 14. The bench observed that captive power generators had relied on these exemptions since 1994 and had organized their commercial activities accordingly. A sudden withdrawal without a notice period leaves industries without time to adjust their financial planning, which the Court termed as an "abrupt policy reversal" that fails the test of reasonableness. "The principles of fair play demand that such withdrawal should not operate in a manner that causes undue hardship to those who have structured their affairs on the basis of concession earlier extended to them."

The Court concluded that while the State's power to withdraw the exemption is upheld, the impugned notifications could not be allowed to operate immediately. To balance the State's revenue needs with the industrial stability of the captive power producers, the Court mandated a one-year transitional period. Consequently, the notifications dated April 1, 2000, and April 4, 2001, were held to be effective only after the expiry of one year from their respective dates, providing the necessary relief for the intervening period. "A period of one year would constitute a reasonable notice, enabling the captive power generators to adjust their operations and financial planning."

The Supreme Court ultimately allowed the appeals by the State of Maharashtra and set aside the High Court judgments that had quashed the notifications entirely. By upholding the State's power while mandating a one-year notice period, the Court reinforced the principle that fiscal flexibility must be tempered with procedural fairness. The ruling clarifies that while concessions are defeasible, the State must act reasonably when resiling from long-standing policy representations.

Date of Decision: 25 March 2026