Updated Wheeling Access Charge Rates Effective 9/1/25

The California ISO has posted the following updated wheeling access charge rates effective as noted below on its Settlements webpage, under the Transmission access charge (TAC) rates/Wheeling access rates/Wheeling rates 2025 subheadings.

These rates will be included in the settlement calculation of transmission access charge transactions starting on the following trade dates:

Wheeling Access Rates	FERC Order	FERC Order Date
Rates effective Sep. 1, 2025	City of Anaheim’s 2025 TRR information under Docket Number ER25-3334	20-Jan-26
Rates effective Sep. 1, 2025	City of Riverside’s TRR information under Docket Number ER25-3349	20-Jan-26

Rates effective Sep. 1, 2025:

March 2, 2026 – T+9B Initial Statement
Dec. 8, 2025 – T+70B Recalculation Statement
Sep. 1, 2025 – T+11M Recalculation Statement

Contact information

Please contact ISO Customer Service at 916-608-7320 with any questions.