In 2017, Tamil Nadu cut electricity tariffs even as the cost of supplying power continued to rise. The gap between what electricity costs to supply and what consumers pay for it widens by a few paise per unit, and nobody outside the regulatory commission notices this. Eight years later, the accumulated losses on Tamil Nadu Power Distribution Corporation Limited’s (TNPDCL) books stand at Rs 1,19,153 crore.
Strong State, Weak Wire
That number is worth pausing. This is the state that topped the Good Governance Index among large states in 2019, sits in India’s upper tier on human development and has the highest higher-education enrolment ratio among states. Electronics exports reached USD 14.65 billion last year, with Apple, Samsung and Foxconn anchoring a cluster that has made the state a serious node in global supply chains. Installed power capacity stands at 39,770 MW. Renewables account for 23,056 MW. Record peaks in wind (5,899 MW) and solar (6,579 MW) signal a grid that can already run high instantaneous shares of clean energy.
The distribution utility that sits in the middle of all this scored 43.92 out of 100 on the Ministry of Power’s latest integrated rating – B minus. It stood 39th of 44 discoms nationally. The dissonance between Tamil Nadu’s institutional ambition and its power-sector reality is the central fact of the state’s industrial future.
Feedback loop of losses
The fiscal arithmetic is not complicated. Tariff subsidies and loss-coverage grants to the discom quadrupled in under a decade, from Rs 7932 crore in FY 2015-16 to Rs 31,849 crore in FY 2024-25, roughly 30 per cent of the state’s fiscal deficit. Government guarantees for TNPDCL borrowing, add another Rs 41,957 crore of contingent liability. One stream competes with schools and hospitals for budget space. The other crystallises if the discom cannot service its own debt. Both crowd out what Tamil Nadu’s governance does best.
What makes this more than a fiscal problem is the feedback loop it creates. The discom under-invests and supply quality erodes. Industry self-supplies through captive generation and open access, removing the discom’s best-paying customers. The state compensates with larger subsidies, crowding out other public spending thus weakening its ability for capital investment.
Numbers That Don’t Quite Add Up
Opacity compounds the problem. The government’s policy note claims collection efficiency of nearly 99 per cent. The PFC’s integrated rating reports 98.58 per cent collection efficiency but only 90.32 per cent billing efficiency, meaning roughly one in ten units entering the network is not billed. That is precisely the kind of ambiguity that gives lenders pause.
The usual explanations for discom distress in India are theft, non-payment, populist giveaways. All these apply in Tamil Nadu too, but what distinguishes is tariff drift. The state revised tariffs only four times in over a decade: 2012, 2017, 2022 and 2024 and one was a tariff cut. Tamil Nadu is now correcting course. Tamil Nadu Electricity Regulatory Commission’s (TNERC) multi-year tariff framework, established in Tariff Order No. 7 of 2022, delivers automatic CPI-linked annual adjustments capped at 6 per cent. The FY 2025 – 26 order applies a 3.16 per cent escalation from July 2025. This converts tariff-setting from a political event into an administrative routine. It is the single most important reform the state has activated in years. Whether it proves sufficient depends on what happens around it.
Electricity as Industrial Policy
The interesting question is not how to fix the discom. The state has already begun with it. It is to utilise the larger opportunity sitting in front of it. The state has majority-renewable capacity, record solar and wind peaks, a manufacturing base that global supply chains trust and governance infrastructure few Indian states can match. The missing element is a distribution utility capable of converting renewable capacity into a platform that industry can depend on. Call it an electro-state: a jurisdiction where electricity is not merely an input but the competitive foundation on which industrial strategy is built. The question shifts from “how do we fix the discom” to “what must the grid become so that the quality and cost of electricity attract global manufacturing toward Tamil Nadu?”
Three Fault Lines in the Grid
Three things stand between the current reality and that possibility. The fiscal hole is the most visible: a discom that depends on annual rescue cannot sign long-term storage contracts, attract private capital, or invest in grid modernisation. The tender for 3.04 crore smart meters under the national distribution reform scheme will be revealing.
The pricing structure is the second. Tamil Nadu’s industrial tariffs, loaded with cross-subsidies and electricity duties, are high by Asian manufacturing standards. Every factory that builds captive solar-plus-storage behind the meter improves its own economics and worsens the grid’s. Time-of-day pricing that rewards load-shifting to solar-rich afternoons would give industry a reason to stay on the grid rather than leave it.
The third is flexibility. Peak demand hit 20,830 MW in May 2024 and is projected at 22,150 MW for FY 2025 – 26. The gap between what renewables deliver and what the grid must serve at peak is a storage and demand-response problem and less a discom challenge. A pumped-storage plant that firms up evening solar for a semiconductor fab is as much industrial policy as the land subsidy that attracted the fab.
These are not separate reform items. They are facets of a single bet: that Tamil Nadu’s grid can become the competitive platform its manufacturing economy requires, rather than the fiscal burden it currently is. The conditions for a virtuous cycle exist- competitive tariffs attract manufacturing, which raises load and revenue, which funds grid investment, which attracts more manufacturing. But the cycle runs in both directions, and right now the reverse loop is the one turning.
The author is a Senior Visiting Fellow at Insignia Policy Research.
