Fourth Quarter 2023 Earnings Review and Business Update slide image

Fourth Quarter 2023 Earnings Review and Business Update

Current electric rate information by jurisdiction (continued) General Rate Case Provisions North Carolina South Carolina Florida Indiana Ohio (Electric) Kentucky (Electric) Notice of Intent Required? Yes Yes Yes Yes(1) Yes Yes Notice Period 30 Days 30 Days 60 Days 30 Days(2) 30 Days 30 Days Base Rate Case Test Year Historical(3) Historical (3) Projected Optional (4) Partially Projected Forecast Optional Multi-Year Rate Plan Yes(5) No Yes No No No Only under multi- Time Limitation Between Cases 12 months No 15 Months No No year rate plan Rates Effective Subject to Refund 7 Months After Filing 6 Months After Filing (6) 8 Months After Filing 10 Months After Filing (7) 9 Months After Filing 6 Months After Filing (8) (1) IURC recommended procedure. Not a statutory requirement (2) As least 30 days to avoid ex parte issues (3) Historical, adjusted for known and measurable changes (4) Utilities may elect to a historical test period, a forward-looking test period, or a hybrid test year in the context of a general rate case (5) Multi-year Rate Plans in NC include projected capital spending projects and their associated O&M for up to 3 years, with a cap on the annual increase of 4% (6) If the South Carolina Commission fails to rule on a rate case filing within 6 months, the new rates can be implemented and are not subject to refund. There is a grace period here. The Company would have to notify the Commission that it planned to put rates in, and the Commission would then have 10 additional days to issue an order (7) The utility may implement interim rates, subject to refund, if the IURC has not rendered a decision within 10 months of filing (can be extended 60 days by IURC). The interim rates are not to exceed 50% of the original request (8) The effective date is 7 months after filing for a forecasted test year DUKE ENERGY FOURTH QUARTER 2023 EARNINGS REVIEW AND BUSINESS UPDATE // 44
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