How to read my bill

TEP's rates reflect the cost of providing safe, reliable electric service to our customers. They also reflect the complexity of that task, with fixed charges, usage-based charges and surcharges that can be difficult to understand. The following summary offers explanations for the terms you'll find on your monthly bill, including links to details posted elsewhere on this website.

Delivery Services

The charges listed in this section of your bill recover the cost of delivering power to customers. These charges reflect the cost of poles, wires, transformers and other infrastructure; employees and contractors who install, operate and maintain that equipment; and other necessary business expenses.

The Arizona Corporation Commission (ACC) sets rates that divide responsibility for these costs among different types of customers — residential, small business, large business and industrial — based on their typical energy usage patterns. TEP's rates are designed to recover the appropriate portion of these costs from each customer group through a combination of fixed fees and usage-based charges.

Power Supply Charges


This section of your bill includes usage-based charges to cover the cost of generating or buying energy for customers.

Green Energy Charges


TEP is using more renewable power, helping customers save energy and improving the environmental profile of its generating resources. Some of the costs associated with these efforts are recovered through usage-based surcharges approved by the ACC and listed in this section of your bill.

Taxes and Assessments


The charges on your bill are subject to government taxes and fees. TEP forwards all of the money collected from these charges to the appropriate authorities.

New Bill

Have a question about the new version of our bill? Click through to see a summary of sections and terms found on the new bill.

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The TEAM is a charge or credit that passes along the cost or benefit of tax law changes to customers.

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The TCA is a charge or credit that reflects a portion of transmission costs associated with serving retail electric customers.

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The PPFAC is a usage-based charge that reflects changes in the costs TEP incurs to fuel its power plants and purchase energy for customers.

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The Renewable Energy Standard Tariff (REST) funds Tucson Electric Power's investments in renewable energy.

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DSM Surcharge

The DSM charge is a monthly, usage-based charge established by the Arizona Corporation Commission (ACC) to pay for cost-effective energy efficiency programs.

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The ECA is a charge that allows TEP to recover a portion of the expenses for improvements made at TEP’s power plants.

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LFCR Charge

The Lost Fixed Cost Recovery (LFCR) charge, approved in 2013 by the Arizona Corporation Commission (ACC), will partly offset the revenue TEP loses when customers reduce their bills through our conservation and renewable energy programs.

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Acquisition Credits

TEP customers will enjoy winter bill savings over five years as a result of the acquisition of TEP’s parent company by Fortis Inc., the largest investor-owned gas and electric distribution utility in Canada.

Under terms of Fortis' August 2014 acquisition of UNS Energy Corporation, customers of TEP and sister company UniSource Energy Services (UES) will receive bill credits totaling $30 million over five years. Savings totaling $10 million will be applied in year one, and $5 million will be applied annually over the next four years.

TEP will apply these credits to the monthly Customer Charge on bills issued from October through March. The resulting savings will range from $1.07 per month for residential customers to more than $200 per month for the largest commercial and industrial customers. Additional credits will be applied through temporary reductions in usage-based charges from October 2014 through March 2015; their impact will vary with consumption.

Monthly Acquisition Bill Credits for Residential Customers

  Credit applied
to monthly
Customer Charge
Average credit applied
to monthly Purchase
Power and Fuel
Adjustment Charge
Total monthly
bill credits
October 2014 — March 2015 $1.07 $0.56 $1.63
October 2015 — March 2016 $1.07 n/a $1.07
October 2016 — March 2017 $1.07 n/a $1.07
October 2017 — March 2018 $1.07 n/a $1.07
October 2018 — March 2019 $1.07 n/a $1.07
* This amount is based on average monthly usage of 700 kilowatt hours from October 1, 2014 to March 31, 2015.

These bill credits represent the only direct impact on rates that will result from the acquisition. TEP will not seek to recover any transaction-related costs in future rates. The Arizona Corporation Commission will continue to set the company rates based on the costs incurred to provide safe, reliable service.

Demand Side Management Charge

Lost Fixed Cost Recovery (LFCR) Charge

Environmental Compliance Adjustor