EDISON INTERNATIONAL

Net Operating Loss and Tax Credit Carryforwards

Edison International has approximately $3.6 billion of tax effected net operating losses and tax credit carryforwards at December 31, 2024 (after excluding $107 million of Capistrano Wind attributes and offsetting $397 million of unrecognized tax benefits), which are available to offset future consolidated tax liabilities.

See "Notes to Consolidated Financial Statements—Note 8. Income Taxes" for further information regarding taxes payable to Capistrano Wind.

Inflation Reduction Act of 2022

The IRA imposes a 15% corporate alternative minimum tax ("CAMT") on adjusted financial statement income ("AFSI") of corporations with average AFSI exceeding $1.0 billion over a specified 3-year period. The CAMT was effective beginning January 1, 2023. Based on the current interpretation of the law and historical financial data, Edison International estimates that it will exceed the $1.0 billion threshold and be subject to CAMT on its consolidated federal tax returns beginning in 2026. SCE expects to be subject to CAMT on its stand-alone Federal return beginning in 2026.

The law also includes significant extensions, expansions, and enhancements of numerous energy-related investment tax credits, as well as creating new credits applicable to electricity production which may apply to SCE's capital expenditures. Under the IRA, as of December 31, 2024, SCE generated investment tax credits of approximately $231 million related to two utility owned storage projects, which will be recognized and returned to customers, as the credits are utilized.