Cheap market power curbs NDMC’s Q4 PPAC claim as DERC caps surcharge at 8.75%
Delhi’s power regulator has sent a clear message to utilities chasing aggressive surcharge recovery: cheaper market power weakens the case for sharp tariff escalation.
The Delhi Electricity Regulatory Commission (DERC) has rejected New Delhi Municipal Council’s attempt to impose a steep additional Power Purchase Cost Adjustment Charge (PPAC) for the January–March 2025 quarter. The Commission ruled that NDMC’s procurement strategy — dominated by lower-cost market purchases — does not justify such a front-loaded increase in consumer tariffs.
NDMC’s push for higher PPAC
In Petition No. 46/2025, NDMC approached DERC seeking approval to recover PPAC for Q4 of FY 2024–25. While the utility was already levying an 8.75% PPAC on a suo-motu basis, it claimed that its total PPAC requirement for the quarter stood at 89.55%. NDMC therefore sought permission to recover the remaining 80.80% from consumers over the three-month period.
PPAC is designed as a pass-through mechanism, allowing utilities to recover variations in power purchase costs compared with approved tariffs. NDMC cited higher procurement costs as the basis for its claim.
Regulator zeroes in on procurement mix
During scrutiny of the petition, DERC focused closely on how NDMC sourced its power. The Commission observed that around 90% of NDMC’s electricity during the quarter came from short-term and medium-term markets — sources that were significantly cheaper than long-term contracted power.
DERC noted that NDMC’s proposal effectively sought PPAC recovery across its entire power purchase basket, despite the dominance of lower-cost market-linked procurement. Allowing such recovery, the regulator said, would have translated into a sharp and immediate tariff shock for consumers.
Additional surcharge denied
Taking a consumer-impact view, DERC concluded that the additional PPAC sought by NDMC could not be justified under the prevailing cost structure. The Commission therefore denied permission for the additional 80.80% recovery, while allowing NDMC to continue levying the existing 8.75% surcharge already being recovered within permissible limits.
The order reinforces that PPAC is not an automatic entitlement and must reflect actual cost stress, particularly as utilities increasingly rely on market-based procurement.
True-up route remains open
At the same time, DERC clarified that NDMC is not permanently barred from recovering legitimate costs. Any surplus or deficit arising from power purchase and transmission expenses will be examined during the true-up of the relevant financial year. Such amounts, if approved, would carry carrying cost, subject to a detailed prudence check of NDMC’s procurement and billing practices.
A broader regulatory signal
Beyond NDMC, the ruling carries wider implications for distribution utilities across India. As discoms lean more heavily on short-term and medium-term markets, regulators are tightening scrutiny on surcharge claims. Cheaper market power, the order suggests, strengthens the expectation that cost benefits should flow through to consumers in real time rather than being clawed back through front-loaded PPAC.
For NDMC consumers, the decision averts a sharp Q4 tariff shock. For utilities, it underscores how procurement strategy and cost composition are now central to regulatory outcomes on surcharge recovery.
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