Basic service charge - The minimum charge for having service available, whether you used electricity or not.

Billing - The cost of calculating and providing your monthly statement.

Demand charge - A charge for when you use electricity the most based on the period of time detailed in your rate plan.

Delivery service charge - A charge, based on your kWh usage and/or kW demand, to build and operate the equipment for delivering electricity to your home/business, including lines, poles, transformers and substations.

Environmental benefits surcharge - A charge to cover the costs of programs approved by the Arizona Corporation Commission, including: energy efficiency and renewable energy projects.

Federal Environmental Improvement Surcharge - A charge to recover a portion of the cost of investments and expenses for environmental improvements at APS’ generation facilities designed to comply with environmental standards mandated by federal laws or regulations.

Franchise fee - A charge by a municipality for APS' use of the public rights-of-way for its facilities.

Generation of electricity - The cost of producing the electricity you used this month.

Interim Rate Surcharge - An increase to APS base rates approved by the Arizona Corporation Commission. Funds collected through this surcharge are subject to refund pending the outcome of APS' current rate case.

Meter reading - A fixed fee to determine your energy usage.

Metering - A fixed fee for providing and servicing the meter.

Power Supply Adjustor - An adjustment mechanism to recover fluctuations in fuel and purchased power costs. More information.

Regulatory assessment - A cost imposed on customers of state regulated utilities to help fund the Arizona Corporation Commission and Residential Utility Consumer's Office.

System benefits charge - A charge to cover the costs of programs approved by the Arizona Corporation Commission, including low-income assistance, demand side management, customer education, environmental, renewables, long-term public benefit research and development, nuclear fuel disposal and nuclear power plant decommissioning programs as well as other programs approved by the Commission.

Transmission and ancillary services - The cost for moving high voltage electricity from generating facilities and other sources to the APS distribution lines.

Transmission cost adjustment - A cost, based on your kWh usage, to adjust for annual changes in transmission-related costs procured to serve retail customers.