Updated Wheeling Access Charge Rates Effective 1/1/26

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 2026 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 Jan. 1, 2026	GridLiance West LLC’s 2026 TRR/TRBAA information under Docket Numbers ER26-909 and ER26-924	10-Feb-26
Rates effective Jan. 1, 2026	Horizon West Transmission, LLC’s 2026 TRR/TRBAA information under Docket Numbers ER26-946 and ER26-910	18-Feb-26

Rates effective Jan. 1, 2026:

March 2, 2026 – T+9B Initial Statement
Jan. 1, 2026 – T+70B Recalculation Statement

Contact information

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