GUOC Rates
The owner of a proposed generating unit or aggregated generating facility with a maximum capability of greater than 1 MW is required to pay a Generating Unit Owner’s Contribution (GUOC). For more information, see Section 7 of the ISO Tariff, Generating Unit Owner’s Contribution.
GUOC Rates
|
Planning Region |
Current GUOC Rate* |
Proposed GUOC Rate* effective Jan 1, 2026 |
|
Northwest |
$10,000/MW |
$10,000/MW |
|
Northeast |
$30,000/MW |
$30,000/MW |
|
Edmonton |
$20,000/MW |
$20,000/MW |
|
Central |
$40,000/MW |
$50,000/MW |
|
Calgary |
$30,000/MW |
$30,000/MW |
|
South |
$50,000/MW |
$50,000/MW |
*GST will be applied to the GUOC payment.
To view the geographic areas of each region, see the Planning Region Map.
GUOC Estimate Calculator
To estimate the amount of GUOC that will be required for the current or GUOC rates, enter the planning region and maximum capability in the corresponding calculator below. For more information about the calculation of GUOC, see ID #2025-014T, Generating Unit Owner’s Contribution Calculator.
Current 2025 GUOC Rates
Proposed 2026 GUOC Rates
These online calculators are designed for convenience and should be used for informational purposes only. The accuracy of each calculator and its applicability to particular cases is not guaranteed. The GUOC notice and invoice issued by the AESO may differ from the estimate generated by this online calculator. The AESO makes no claims, promises, or guarantees regarding the accuracy or completeness of the information provided by this online calculator, and expressly disclaims liability for errors or omissions. Consequently, any reliance placed on the information provided herein is at the user’s sole risk.
GUOC Rates and Yearly Update Process
The AESO has determined the GUOC Rates it will propose in the 2026 ISO tariff rates update application, expected to be filed for approval by the Alberta Utilities Commission (AUC) in late 2025. The proposed 2026 rates reflect a change from the current 2025 GUOC rates for the Central planning region. The adjustment is due to the substantial interest in the Central East region. Although the Central East Transfer Out (CETO) project aims to reduce congestion, the strong interest for generation projects in the Central region is expected to continue following the construction of CETO. There are more projects meeting AESO's inclusion criteria, however, they have not materially changed the situation in any of the other regions.
Additional information on the GUOC Rate update process is available in the document link below.
- GUOC Rates and Yearly Updates Process [Posted: Oct. 18, 2022]
If you have questions about the GUOC Rates, please contact ISOtariffnotice@aeso.ca.
