Cost of Service
Cost of service is the regulator-reviewed annual cost of providing utility service, including eligible expenses and a return on approved investment.
Utility regulation concepts covering cost of service, rate base, revenue requirements, rate cases, tariff schedules, commissions, and reliability oversight.
Utility regulation determines how regulated providers recover eligible service costs, finance infrastructure, meet service obligations, and charge customers. The applicable framework depends on the jurisdiction, utility type, statute, tariff, and regulatory order.
For traditional cost-of-service analysis, begin with Cost of Service, then identify the approved Rate Base and allowed return. Those inputs support the annual Revenue Requirement. Rate-of-Return Regulation explains how the components fit together, while a Rate Case tests the evidence. Rate Setting allocates approved revenue, and the Rate Schedule states the charges and service provisions that apply to a defined customer class.
Public Utility and Public Utility Commission (PUC) provide institutional context. NERC concerns North American bulk-power reliability rather than ordinary retail rate approval, so do not treat reliability standards and ratemaking authority as interchangeable.
Identify the regulator and service first. Then locate the governing tariff, effective rate schedule, rate order, test period, expense schedules, plant and depreciation records, capital structure, allowed-return evidence, sales forecast, and customer-class allocation. Trace each approved amount into the revenue requirement and then into the tariff charge that affects the decision.
Utility-regulation material is educational. A specific filing, compliance obligation, recoverability conclusion, or customer-rate dispute requires the current law, tariff, orders, evidence, and appropriate professional review.
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Cost of service is the regulator-reviewed annual cost of providing utility service, including eligible expenses and a return on approved investment.
NERC develops reliability standards for North America's bulk power system and coordinates compliance oversight through the Electric Reliability Organization framework.
A public utility provides infrastructure-based services to the public under service, rate, safety, or other sector-specific oversight.
A Public Utility Commission is a state-level U.S. body that regulates specified utility rates, service, investment, or consumer matters under state law.
Rate base is the regulator-approved value of utility property and related balances on which an allowed return is calculated.
A rate case is a regulatory proceeding that reviews a utility's proposed revenue requirement, cost allocation, tariff rates, or related terms.
A utility rate schedule states the rates, charges, eligibility rules, and service provisions that apply to a defined customer class or service.
Utility rate setting converts an approved revenue requirement into customer-class allocations and tariff charges using forecast billing determinants.
Rate-of-return regulation sets a utility's approved revenue using eligible service costs, a regulatory rate base, and an allowed return.
Revenue requirement is the regulator-approved annual revenue a utility's rates are designed to recover for eligible service costs and allowed return.