FY27 Electricity Tariff Hikes Across India: What C&I Buyers Should Do Now

The short answer

For FY27, roughly nine Indian states and Union territories have raised grid electricity tariffs, about thirteen have held them flat, and Delhi has pushed effective bills up through fuel and power-purchase adjustment charges (PPAC) of roughly 16-18% on top of the base tariff. A 2025 Supreme Court directive is forcing state regulators toward cost-reflective pricing and time-bound clearance of regulatory assets, which means the long-term direction is upward for grid power in most states even where FY27 looks flat. For commercial and industrial (C&I) buyers in Haryana, Rajasthan, Uttar Pradesh and Delhi-NCR, the practical effect is that the avoided-cost side of a rooftop solar business case is strengthening, so the decision is less about whether tariffs rise this year and more about locking in a self-generation asset before the next revision cycle.

This article unpacks the FY27 tariff landscape, why it is moving this way, and what it means for the rooftop solar payback math Sun Wave's buyers actually run.

What actually changed for FY27

India's state electricity regulatory commissions (SERCs) set retail tariffs annually. For FY27 the pattern, as reported by Livemint on 25 August 2026, is uneven and politically shaped.

States that raised tariffs

• Sikkim approved increases of 17-50% across consumer categories, the steepest in the set.
• Chhattisgarh, Jharkhand and Jammu & Kashmir allowed hikes of more than 6%.
• Madhya Pradesh and Goa approved average increases of about 4%.
• In total, about nine states and UTs raised tariffs for FY27.

States that froze or cut tariffs

• Punjab and Himachal Pradesh, both due for polls in 2027, reduced tariffs (Punjab by up to Rs 1.5/unit in some slabs; Himachal by around 1 paisa).
• About thirteen states, including poll-bound Uttar Pradesh and Uttarakhand, kept tariffs unchanged despite rising supply costs.

The Delhi nuance: frozen base, rising effective bill

Delhi has not raised base tariffs, but discoms have been allowed to recover PPAC of 16-17.94% of the electricity bill since 10 June 2026. For a C&I consumer this is the same as a tariff hike by another name: the per-unit effective cost climbs even though the headline tariff order reads flat. Delhi's discoms and Maharashtra's regulator are both outside the election cycle, which is why PPAC and multi-year resets are showing up there now rather than after polls.

Why this is the direction of travel

Three forces are pushing grid tariffs up over the medium term regardless of which party runs a state.

1. The Supreme Court's August 2025 cost-reflective directive

In August 2025 the Supreme Court directed states to move toward cost-reflective electricity tariffs and prepare time-bound plans to clear regulatory assets, the deferred costs discoms could not recover from consumer tariffs and instead carried on their books. Some states hold very large regulatory-asset balances (Tamil Nadu's runs to roughly Rs 90,000 crore), so clearing them implies tariff pressure for several years. FY27 is the first full tariff cycle after that directive, which is why even politically cautious states are quietly allowing PPAC and fixed-charge increases while keeping the base tariff flat.

2. Discom finances improved, but the next cost wave is incoming

The gap between average cost of supply (ACS) and average revenue realised (ARR) narrowed sharply to about Rs 0.06/unit in FY25 from Rs 0.78/unit in FY21, and aggregate technical and commercial (AT&C) losses fell to 15.04% from 21.91% over the same period. That recovery gave regulators room to delay tariff hikes through the last cycle. But rating agency Icra notes that median approved power purchase cost for 13 major state discoms still fell only to Rs 4.90/unit in FY26 from Rs 5.70 in FY23, and that power procurement costs may rise going forward because of high PPA costs for new thermal assets and elevated tariffs from the newer round of firm-and-dispatchable renewable schemes. In other words, the cheap legacy PPAs are rolling off and cost-reflective recovery is arriving at the same time.

3. Fixed charges are becoming standard

As the former CEA chairman Pankaj Batra noted in the same coverage, most state discoms have now started charging explicit fixed charges based on contracted capacity, alongside fuel/energy surcharges. For C&I consumers this matters: even if your energy charge looks stable, your demand-charge burden can rise independently, which is exactly the component a rooftop solar plant with battery or smart load management can offset.

What this means for C&I rooftop solar ROI

A rooftop solar business case is built on the gap between what you would pay the discom and what self-generation costs you per unit. Two of the three inputs on the discom side are moving up.

The avoided-cost math is strengthening

If your facility is in a state that raised the energy tariff (Chhattisgarh, Jharkhand, MP, Goa, Sikkim, J&K) or in Delhi where PPAC is now 16-18%, the per-unit saving from every rooftop kilowatt-hour is higher in FY27 than it was in FY26. In states that froze the base tariff but carry large regulatory-asset balances, the saving is roughly flat this year but the forward curve is up.

Fixed charges tilt the case toward right-sized rooftop plus BESS

Because more of the bill is becoming fixed/demand-charge based, a solar plant sized only to offset energy units leaves money on the table. Pairing rooftop solar with battery energy storage (BESS) to shave peak demand and flatten the load curve attacks both the energy and the demand components. This is especially relevant where Time-of-Day (TOD) tariffs apply, as they now do for Haryana industry.

Frozen-tariff states are a buy-the-dip window

In poll-bound Uttar Pradesh and Uttarakhand, FY27's flat tariff is a political pause, not a structural ceiling. The regulatory-asset overhang and the post-2027 cost-reflective push make a 2026-27 rooftop commissioning decision attractive precisely because the saving is being measured against a temporarily suppressed grid price: when tariffs reset after polls, the same plant's payback shortens retroactively.

How Sun Wave's buyers should act

The framing is not "tariffs rose, panic" but "tariffs are on a cost-reflective trajectory, so move on a timeline you control rather than one the next tariff order forces on you."

1. Re-run the avoided-cost calc with FY27 numbers. Use the actual FY27 tariff order for your discom (DHBVN, PVVNL, JVVNL, BRPL/TPDDL/BYPL) plus any PPAC currently in force, not last year's rates. A 16-18% PPAC swing alone changes payback by a meaningful margin.
2. Size against demand charges, not just energy. If your discom now levies a fixed/demand charge, model the rooftop-plus-BESS option that targets peak-kVA reduction, not just unit offset.
3. Lock grid-integration steps early. Net-metering approval and load-enhancement sanction timelines have not shortened just because tariffs rose. For Haryana buyers the process step recently simplified under the PM Surya Ghar framework is worth understanding even where the direct benefit scope is residential, because it signals the discom's direction on charge deferral.
4. If you are in a frozen-tariff poll-bound state, treat the pause as the window. Commissioning in FY27 means your asset is generating against a suppressed grid price, and the first post-poll tariff order resets the saving in your favour.

State-by-state quick read for North India

Frequently Asked Questions

Did all Indian states raise electricity tariffs in FY27?

No. About nine states and UTs raised tariffs, roughly thirteen froze them, and two (Punjab, Himachal Pradesh) cut them. Delhi kept the base tariff flat but added 16-18% PPAC, so effective bills rose. The variation is largely political, with poll-bound states holding the line.

What is PPAC and why does it matter for solar ROI?

PPAC is the Power Purchase Adjustment Charge, a pass-through that lets discoms recover changes in their power procurement cost. In Delhi it is currently 16-17.94% of the bill. Because rooftop solar offsets purchased units, a higher PPAC raises the per-unit saving from self-generation, directly improving payback.

Is rooftop solar still worth it in a state that froze tariffs?

Usually yes. A frozen tariff is a political pause, not a structural ceiling. The 2025 Supreme Court directive on cost-reflective tariffs and regulatory-asset clearance means forward tariffs are expected to rise, so a plant commissioned during the freeze generates against a temporarily suppressed grid price and benefits when tariffs reset.

How do fixed or demand charges change the solar decision?

When more of the bill is fixed or demand-based, a solar-only plant sized to offset energy units leaves demand charges untouched. Pairing rooftop solar with battery storage to shave peak demand attacks both components, which is why BESS is increasingly part of the C&I business case, especially under Time-of-Day tariffs.

Which North Indian states should C&I buyers watch most closely?

Haryana (TOD tariffs plus net-metering process changes), Delhi (PPAC driving effective cost up), Uttar Pradesh (frozen pre-poll, a commissioning window), and Rajasthan (rapid open-access growth alongside rooftop). Each has a different mechanism pushing the avoided cost of grid power up, so the rooftop case is strengthening across the belt rather than in one state alone.

Sources

• Livemint, 25 August 2026: Power tariffs rise in several states as elections curb broader hikes.
• Supreme Court of India, August 2025 directive on cost-reflective tariffs and regulatory assets (as cited in Livemint).
• Icra commentary on FY26 median approved power purchase cost (Rs 4.90/unit) and forward PPC pressure.
• Union power ministry FY25 ACS-ARR and AT&C loss data referenced in the same coverage.

For more on the open-access procurement alternative that lets you buy off-site solar instead of building on-site, see our India open-access state comparison. To model the Haryana-specific net-metering process, see our DHBVN industrial net-metering guide and the HERC excess-demand surcharge relief explainer. For Delhi C&I EPC specifics, see our Delhi NCR solar EPC guide.