Each utility page explains:
- The service covered.
- What each charge pays for.
- How each charge is calculated.
- How each rate changes in the forecast.
Use the service class and supply arrangement to select the relevant page.
Service overview
| Item | What it tells you |
|---|---|
| Service and eligibility | The utility, jurisdiction, voltage, service class, and customer requirements. |
| Supply arrangement | Whether utility service includes electricity supply or requires a separate supply contract. |
| Status and dates | The tariff version, effective terms, and any proposed-policy scenario used in the forecast. |
| Billing and dollar basis | The measurement interval, billing period, and price basis used for results. |
Charge breakdown
The charge table explains what a line item pays for, its billing basis, and how the forecast assesses it. The tariff framework explains these distinctions.
How charges are calculated
Each charge follows its billing rule and uses one of these bases:
- Energy consumed.
- Facility peak demand.
- Demand at a system peak.
- Contracted capacity or site grid-connection capacity.
- Service provided for a billing period, such as customer service or metering.
Each calculation identifies:
- The relevant hours.
- The billing period.
- The units.
- Any minimum charge, demand floor, or ratchet.
Each charge is calculated from the billed quantity and applicable rate, with a period adjustment where required.
Imported energy and total electricity consumption can differ when a site has onsite generation or storage. Customer demand at a system peak can also differ from the customer’s own peak. The utility page identifies the quantity used and any approximation.
Forecast methodology
Filed rates provide the starting point. Future rates may follow wholesale prices, utility cost recovery, load growth, inflation, or a stated recovery schedule. The forecast section states how each rate changes.
Scenario pages identify the alternative rules and their assumed start dates. Use the forecast region’s dollar base year when comparing nominal tariff rates with forecast results: real 2026 dollars for SPP and real 2025 dollars for ERCOT, PJM, and MISO. Rebase results to the same year before comparing regions.
Assumptions and limitations
This section states which customer profiles the forecast covers, which charges are excluded, and which billing rules are simplified. It explains how those choices affect costs.
Public tariffs and regulatory filings
Sources link to public tariff schedules, riders, and regulatory filings, with the relevant schedule or page. Use the tariff version stated on the utility page; linked tariff books may have been updated.