Consumers Cannot Be Burdened With Tariff Charges Beyond Period Of Service Delivery: Supreme Court

"Tariff determination is not merely a mathematical exercise but a regulatory balancing act. The object of enabling reasonable cost recovery for utilities must be weighed against and calibrated with, paramount obligation to safeguard consumer interest." Supreme Court, in a significant ruling dated May 7, 2026, held that a generating company cannot recover the capital cost of a power plant from consumers through depreciation once the plant has ceased to supply electricity.

A bench of Justice Pamidighantam Sri Narasimha and Justice Alok Aradhe observed that allowing such recovery beyond the period of actual operation would be contrary to the mandate of safeguarding consumer interests under the Electricity Act, 2003.

The bench was adjudicating an appeal filed by the Delhi Electricity Regulatory Commission (Commission) against a judgment of the Appellate Tribunal for Electricity (APTEL). The tribunal had previously directed that Tata Power Delhi Distribution Limited (TPDDL) be permitted to recover the entire capital cost of its Rithala Combined Cycle Power Plant over a fifteen-year period, despite the plant’s operational tenure being limited by regulatory approval to six years ending in March 2018.

The dispute originated from the establishment of a 108-megawatt gas-based power plant at Rithala, conceived as a short-term measure to meet peak demand during the 2010 Commonwealth Games. While the plant had a technical useful life of fifteen years, the Commission’s regulatory approval and the Power Purchase Agreement (PPA) expressly restricted its operational and tariff recovery framework to six years. When TPDDL sought to recover the remaining capital cost of approximately ₹94.59 crores after the plant ceased operations in 2018, the Commission rejected the claim, leading to the litigation.

The primary question before the court was whether depreciation under tariff regulations must be allowed over the entire technical useful life of an asset regardless of whether it is actually utilized for electricity supply. The court was also called upon to determine if Regulation 6.32 of the DERC Regulations, 2011, confers an absolute right on a utility to recover capital costs even after it stops serving consumers.

Consumer Welfare Is A Guiding Principle In Tariff Determination

The Supreme Court emphasized that Section 61(d) of the Electricity Act, 2003, establishes consumer welfare not as a peripheral consideration but as a central and guiding statutory principle. The bench noted that while utilities are entitled to recover costs in a reasonable manner, this must be balanced against the interests of the retail consumers who pay the tariffs.

The court observed that in the present case, electricity was admittedly not supplied to consumers beyond March 2018. The bench remarked that the regulatory framework is designed to ensure that the public is not burdened with the costs of a service that is no longer being rendered to them by the utility.

"The consumers cannot be required to pay for a service which they no longer received."

Harmonious Construction Of Regulatory Provisions Is Mandatory

Addressing the interpretation of the DERC (Terms and Conditions for Determination of Generation Tariff) Regulations, 2011, the court held that no provision can be read in isolation. It ruled that Regulation 6.32, which deals with the methodology of calculating depreciation, must be read harmoniously with Regulation 4.1, which confines tariff entitlement to the period approved in the PPA.

The bench clarified that Regulation 6.32 does not confer an absolute and unconditional right upon a generating utility to recover depreciation from consumers for a period when the asset is free to supply electricity elsewhere. The court found that APTEL had erred in treating the technical life of the plant as synonymous with the regulatory recovery period.

"Regulation 6.32 of the 2011 Regulations does not, and cannot, override the broader statutory and regulatory framework."

Utility Was Free To Operate As A Merchant Generator

The Court highlighted that there was no legal impediment preventing TPDDL from selling power as a merchant generator to other entities after the expiry of the six-year period. Since the utility was free to exploit the plant beyond the period of the PPA to recover its capital costs from other buyers, it could not seek to fasten that liability onto the retail consumers of Delhi.

The bench further noted that the Commission’s 2017 order, which fixed the operational limit to March 2018, had attained finality as it was never challenged by TPDDL. Consequently, the true-up proceedings could not be used as a back-door entry to reconfigure the established tariff framework or extend the recovery period beyond what was originally sanctioned.

"TPDDL cannot be permitted to burden the consumers with tariff charges beyond March-2018."

The Supreme Court concluded that the technical useful life of an asset is distinct from the regulatory period allowed for cost recovery from a specific set of consumers. The bench held that APTEL’s approach was inconsistent with the finality of the Commission's earlier orders and the core objectives of the 2003 Act. Resultantly, the Court set aside the APTEL judgment and restored the Commission’s order dated November 11, 2019.

Date of Decision: May 07, 2026