The Appellate Tribunal for Electricity (APTEL) has ruled in favor of tata power in a long-standing regulatory dispute with the Maharashtra Electricity Regulatory Commission (MERC), overturning key disallowances related to tax expenses. The judgment, delivered on August 1, 2026, addresses the company’s appeal against MERC’s Multi-Year Tariff (MYT) Order dated August 8, 2016, which had excluded significant property and income tax costs from the company’s allowable operating expenditures.

This development is material for investors as it concerns a claim valued at approximately ₹268 crore, although the final financial impact remains contingent on subsequent regulatory actions. By validating these costs as legitimate operational expenses, the tribunal’s decision strengthens the company’s position in recovering historical costs that were previously barred from tariff calculations, potentially improving long-term revenue realization from its Maharashtra operations.

Tribunal Ruling and Remand Directions

APTEL held that MERC had erred in classifying property tax as an uncontrollable operating and maintenance (O&M) expense and in disallowing income tax for the period spanning FY 2007-08 to FY 2013-14. The tribunal determined that these exclusions were incorrect under the prevailing regulatory framework.

Consequently, APTEL has remanded the specific issues back to MERC. The regulator has been directed to pass an order on these matters expeditiously. The final quantum of the claim will crystallize only upon the completion of these remand proceedings and the issuance of MERC’s subsequent order.

Regulatory Disclosure and Compliance

The company made this disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, read with SEBI Master Circular HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026. The filing was signed by Vispi S. Patel, Company Secretary, on August 1, 2026.

While the immediate financial implication is listed as nil due to the pending remand process, the resolution of this dispute removes a significant regulatory uncertainty surrounding the company’s historical cost recovery mechanisms in Maharashtra.

Tata Power has completed the acquisition of a 100% equity stake in Ryapte Power Transmission Limited (RPTL) for a cash consideration of ₹10.87 crore, finalizing the deal on July 30, 2026. This transaction strengthens Tata Power's presence in the power transmission sector by adding a project special purpose vehicle (SPV) dedicated to infrastructure development in Karnataka. The acquisition aligns with the company's strategy to expand its transmission network capabilities through Build-Own-Operate-Transfer (BOOT) arrangements, enhancing grid stability and distribution capacity in the region.

The transaction was executed pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, following a Share Purchase Agreement (SPA) signed earlier in the year. In a disclosure to stock exchanges on July 30, 2026, Tata Power confirmed that the acquisition process was completed on this date. The company stated that the deal is not a related party transaction and that no promoter or group companies hold an interest in RPTL. The acquisition received the necessary approval from the Ministry of Power for the share transfer.

RPTL, incorporated on May 21, 2025, was specifically formed to establish a transmission system comprising approximately 250 km of line routes. The project scope includes high-voltage direct current (D/C) lines and underground cables connecting key substations in Karnataka. Key components include a 400 kV D/C line from Ryapte AIS Sub-station to the proposed 400/220 kV Doddathaggalli GIS Sub-station, and another 400 kV D/C line from the existing Kolar Sub-station to Doddathaggalli. Additionally, the project involves 220 kV D/C lines and underground cables linking Doddathaggalli to existing substations at Ekarajapura, Hosakote, and Sarjapura.

Beyond transmission lines, the project includes the establishment of major substation infrastructure. This involves setting up a 5x500 MVA, 400/220 kV substation at Ryapte in Tumkur District, equipped with 2x125 MVA 400 kV Bus Reactors. A second facility, a 3x500 MVA, 400/220 kV GIS substation, will be established at Doddathaggalli near Hosakote, also featuring 2x125 MVA 400 kV Bus Reactors. These installations are critical for enhancing grid stability and power distribution capacity in the region.

Project Infrastructure Overview

The following table summarises the key technical components and specifications of the RPTL project:

Project Timeline and Operational Details

The operational roadmap for RPTL is defined by a specific schedule for commercial operation. The Schedule Date of Commercial Operation (SCOD) for the SPV is set at 30 months from the date of acquisition, indicating when the transmission assets are expected to become fully operational and generate revenue. The BOOT model implies that Tata Power will own and operate these assets for the specified period before transferring them, in line with standard regulatory frameworks for such projects.

Strategic Implications

The acquisition of RPTL represents a targeted expansion into the transmission segment, allowing Tata Power to leverage specialised infrastructure projects without integrating them directly into its core generation or distribution businesses initially. By acquiring a fully formed SPV with clear regulatory approvals and defined technical specifications, Tata Power mitigates early-stage development risks. The involvement of the Ministry of Power underscores the strategic importance of these transmission links in Karnataka's power grid. The ₹10.87 crore consideration reflects the value assigned to the SPV's assets and future revenue potential under the BOOT framework, supporting Tata Power's broader objective of diversifying its energy portfolio and enhancing its role in national power infrastructure development.