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Markets2026 FERC Billing Rate Adjustment and 2025 FERC Fees Supplemental Billing
The California ISO (ISO) will adjust the 2026 Federal Energy Regulatory Commission (FERC) billing rate from $0.117240 to $0.09966. This is the latest rate from the FERC Energy Regulatory Commission Annual Charges billing, and the adjustment is in accordance with ISO Tariff Section 11.19.3.2. The new rate will be reflected beginning trade date Oct. 1 T+9B Initial assessment.
Additionally, upon reviewing the FERC Energy Regulatory Commission Annual Charges billing, the invoiced amount is less than the 2025 annual FERC charges that have been assessed to scheduling coordinators. The over-collection amount meets the threshold percentage for assessment of supplemental billing.
Therefore, in accordance with ISO Tariff Section 11.19.3.4, a supplemental billing under Charge Code 525 FERC Fee Over/Under Recovery is required. The ISO will include the supplemental billing of the 2025 FERC Fees over-collection in the July 2026 Monthly Initial invoices that are due on Aug. 19, 2026.
A reconciliation of the 2025 Annual Charge is as follows: |
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2025 FERC Annual Charge (Final): | $ 20,750,396.00 |
Total Previously Invoiced | 24,570,385.11 |
2025 FERC Fees over-recovered | $ (3,819,989.11) |
Other Adjustments: |
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Add: Prior years FERC Fees under-recovered | - |
Less: Interest earnings | 744,255.21 |
2025 FERC Fees Supplemental Billing | ($4,564,244.32) |
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2025 Billable Quantities | 216,775,867.19 |
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2025 Supplemental Billing Rate | ($0.021055) |
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Actual Change % | -22.0% |
Please contact ISO Customer Service at 916-608-7320 with any questions.