California ISO Final 2027 Payments Calendar posted

The California ISO (ISO) has posted the final version of the 2027 payments calendar to its website in accordance with section 11.29.24 of the ISO Tariff. The ISO Payments Calendar 2027 is available on its website at Settlements webpage under the Payments and charges heading. 

On Sep. 25, 2026, the ISO posted the draft version of its 2027 payments calendar for market participant review. 

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