Electric Rates

Take control of your electric bill by choosing the pricing plan that is right for you.

UniSource Energy Services offers four unique plans that give residential and small commercial customers the ability to reduce their bills by changing their energy usage habits. With these pricing plans, you can choose to save energy and lower your bill.

Two of the plans include time-of-use rates that offer discounts for usage during off-peak hours. And two of the plans pair reduced energy charges with a “demand” charge that rewards customers who can limit their concurrent use of large appliances during on-peak hours.

No action is required of customers who want to stay on their current pricing plan.

Residential pricing plans:

UniSource Energy Services: Residential Lifestyle Calculator

Residential Lifestyle Calculator

Which pricing plan should you consider? Answer a few questions to find out which plan might be right for you.
UniSource Energy Services: Time-of-Use (TOU)

Time-of-Use (TOU)

Shift a majority of your usage to off-peak hours and reduce your monthly bill.
UniSource Energy Services: Peak Demand

Peak Demand

Pay lower energy rates plus a charge for your highest hourly on-peak usage.
UniSource Energy Services: Demand TOU

Demand TOU

Combines demand and time-of-use components to maximize your savings opportunities.
UniSource Energy Services: Basic


Pay bills based on your total monthly electric use, regardless of when it occurs.

Residential pricing plan comparison

Residential pricing plan comparison
Charges TOU  Peak Demand Demand TOU Basic
 Basic Service Charge $12 $12 $12 $15
Energy Charge Lower Even Lower Lowest Low
Demand Charge? No Yes Yes No
Observe time-of-use hours? Yes Yes Yes No
How to save money * Use less energy
* Shift to off-peak hours
* Use less energy
* Level out your load
* Use less energy
* Shift to off-peak hours
* Level out your load
* Use less energy

Small General Service pricing plans:

UniSource Energy Services: SGS Time-of-Use

SGS Time-of-Use

Shifting the majority of your business' electricity usage to off-peak hours can reduce your bill.
UniSource Energy Services: SGS Peak Demand

SGS Peak Demand

Avoid using a lot of energy at any one time during peak usage periods.
UniSource Energy Services: SGS Demand TOU

SGS Demand TOU

Use less power during time periods when businesses typically use energy the most.
UniSource Energy Services: SGS Basic

SGS Basic

Pay bills based on your small business' total monthly electric use.

Current Plans

Notice to Applicants

Upon request of the Customer, either at the time of application or after, the Company will use its best efforts to assist the Customer in choosing an appropriate Rate. However, upon application for service or upon request for assistance, the Applicant or the Customer will elect the applicable Rate best suited to his requirements. The Company may assist in making this election, but will not be held responsible for notifying the Customer of the most favorable Rate and will not be required to refund the difference in charges under different Rates. The Customer is solely responsible for selecting the Rate the Customer believes is appropriate. If no Rate is selected; the Customer will be placed on the standard Rate for the class of service and the Company will not be liable to refund the difference in charges had the Customer been placed on different Rates.

F - Frozen, not available to new customers, including current customers who move.

Current Plans
Rate Code Description
ERRES Basic Opens pdf (Residential Service)
ERREST Time-of-Use Opens pdf (Residential Service Time-of-Use)
ERRESD Peak Demand Opens pdf (Residential Service Demand)
ERRESDT Demand Time-of-Use Opens pdf "(Residential Service Demand Time-of-Use R-Tech)
ERRDTT Residential Demand Time-of-Use R-Tech Opens pdf (Residential Service Demand Time-of-Use)
EGSGS SGS Basic Opens pdf (Small General Service)
EGSGST SGS Time-of-Use Opens pdf (Small General Service Time-of-Use)
EGSGSD SGS Peak Demand Opens pdf (Small General Service Demand)
EGSGSDT SGS Demand Time-of-Use Opens pdf (Small General Service Demand Time-of-Use)
EGMGS Medium General Service Opens pdf
EGMGST Medium General Service Time-of-Use Opens pdf
EGMGSST Time-of-Use for Medium General Service Schools Opens pdf
EGLGS Large General Service Opens pdf
EGLGST Large General Service Time-of-Use Opens pdf
EGLGSST Time-of-Use for Large General Service Schools Opens pdf
EILPS Large Power Service Opens pdf
EILPST Large Power Service Time-of-Use Opens pdf
EGLTG Lighting Service Opens pdf
EGIPS-F Interruptible Power Service (Frozen) Opens pdf
R-1 Purchased Power Fuel Adjustor Clause Opens pdf (PPFAC)
R-2 Demand Side Management Opens pdf
R-3 Market Cost of Comparable Conventional Generation Opens pdf (MCCCG) Calculation as Applicable to Rider-4 NM-PRS
R-4 Net Metering for Certain Partial Requirements Service Opens pdf (NM-PRS)
R-5 Electric Service Solar Rider Opens pdf (Bright Arizona Community Solar™)
R-6 Renewable Energy Standard and Tariff Opens pdf(REST) Surcharge REST-TS1 Renewable Energy Program Expense Recovery
R-7 Customer Self-Directed Renewable Energy Option Opens pdf REST-TS2 Renewable Energy Standard Tariff
R-8 Lost Fixed Cost Recovery Opens pdf (LFCR)
R-9 Transmission Cost Adjustor Opens pdf (TCA)
R-10 Renewable Portfolio Standard Credit Rider Opens pdf (TCA)
R-12 Interruptible Power Service Opens pdf
R-13 Economic Development Rate Opens pdf
R-14 Resource Comparison Proxy Export Rate Opens pdf(RCP-PRS)
Statement of Charges UNS Electric Statement of Charges Opens pdf
Tax Adjustment Revised Plan of Administration Opens pdf
Bill Estimation Bill Estimation Methodologies Opens pdf
Curtailment Plan Guidelines for Electric Load Curtailment Opens pdf
QF-A Rates for Power and Energy Transactions With Qualifying Facilities That Receive Full Requirements 100 kW or Less Opens pdf (QF-A)
QF-B Rates for Power and Energy Transactions With Qualifying Facilities That Receive Partial Requirements 100 kW or Less Opens pdf (QF-B)
QF-C Rates for Power and Energy Transactions With Qualifying Facilities That Receive Optional Service Over 100 kW Opens pdf (QF-C)

Proposed Revisions to Rates for Power and Energy Transactions with Qualifying Facilities (QF-A, QF-B, QF-C) - ACC Docket No. E-04204A-18-0087

Public Notice of Hearing to Revise its Qualified Facilities Tariffs

Tax Information

Taxes and Assessments Opens pdf

UniSource Energy Services: Stable Rates

Stable Rates

UES' rates have been very stable, rising at less than the rate of inflation over the last two decades.

Rules & Regulations

Rules and Regulations
No. PDF Description
900 Table of Contents Opens pdf Table of Contents
901 Section 1 Opens pdf Applicability of Rules and Regulations and Description of Service
902 Section 2 Opens pdf Definitions
903 Section 3 Opens pdf Establishment of Service
904 Section 4 Opens pdf Minimum Customer Information Requirements
905 Section 5 Opens pdf Master Metering
906 Section 6 Opens pdf Service Lines and Establishments
907 Section 7 Opens pdf Line Extensions
908 Section 8 Opens pdf Provision of Service
909 Section 9 Opens pdf Character of Service – Voltage, Frequency and Phase
910 Section 10 Opens pdf Meter Reading
911 Section 11 Opens pdf Billing and Collections
912 Section 12 Opens pdf Termination of Service
913 Section 13 Opens pdf Reconnection of Service
914 Section 14 Opens pdf Administrative and Hearing Requirements