Rate-case process
Cost-of-service base-rate regulation with statutory alternative-rate mechanisms.
The PUCO determines used-and-useful utility property, a fair return, and the cost of service when setting just and reasonable rates. Ohio law also permits approved alternative rate plans and riders for defined purposes.
Read the official framework ↗Wholesale power market
Form EIA-861 2024 identifies this utility jurisdiction with PJM; the date records the dataset year, not the original membership start.
Market coverage source ↗State rules
Full base-rate reviews set the broad revenue and return framework. Recurring riders, clauses, and reconciliations can change narrower charges between those reviews. These are governing patterns, not filing-date forecasts.
Electric service
Full base-rate review
Electric · Electric distribution utilities
Every three years beginning by year-end 2029
Effective Aug 14, 2025
Each electric distribution utility must file a distribution rate case by December 31, 2029 and at least every three years thereafter.
Rate period: A utility may use a conventional 12-month test period or propose three consecutive 12-month forecasted rate years with annual true-ups.
Governing rule ↗Between full reviews
Electric
Transmission Cost Recovery Rider
Annual update
The TCRR passes approved transmission-related charges through a reconcilable rider. Utilities file annual updates under the PUCO's rider rules.
Governing source ↗Electric
Electric Security Plan riders
Plan- and rider-specific
An approved electric security plan can include infrastructure, modernization, and other riders with their own update and review schedules rather than waiting for the next distribution base-rate case.
Governing source ↗Natural-gas service
Full base-rate review
Natural gas · Natural-gas utilities serving at least 250,000 customers
Every three years beginning by year-end 2029
Effective Mar 20, 2026
Covered large natural-gas utilities must file a rate case by December 31, 2029 and at least every three years thereafter.
Rate period: A utility may use a conventional 12-month test period or propose three consecutive 12-month forecasted rate years with annual true-ups.
Governing rule ↗Between full reviews
Natural gas
Natural-gas alternative rate plans
Plan-specific
PUCO-approved alternative rate plans may include revenue decoupling and other defined adjustments. The approved plan controls the calculation, reporting, and review cadence.
Governing source ↗Current activity