SOUTHERN CO

(G)INCOME TAXES

See Note 10 to the financial statements in Item 8 of the Form 10-K for additional tax information.

Effective Tax Rate

Southern Company's effective tax rate is typically lower than the statutory rate due to employee stock plans' dividend deduction, non-taxable AFUDC equity at the traditional electric operating companies, flowback of excess deferred income taxes at the regulated utilities, and federal income tax benefits from ITCs and PTCs.

Details of significant changes in the effective tax rate for the applicable Registrants are provided herein.

Southern Company's effective tax rate was 17.2% for the three months ended March 31, 2024 compared to 10.8% for the corresponding period in 2023. The effective tax rate increase was primarily due to a decrease in the flowback of certain excess deferred income taxes at Alabama Power and higher pre-tax earnings, partially offset by an increase in PTCs primarily at Georgia Power.

Alabama Power's effective tax rate was 20.4% for the three months ended March 31, 2024 compared to an effective tax benefit rate of (0.8)% for the corresponding period in 2023. The effective tax rate increase was primarily due to a decrease in the flowback of certain excess deferred income taxes.

Georgia Power's effective tax rate was 15.3% for the three months ended March 31, 2024 compared to 15.1% for the corresponding period in 2023. The effective tax rate increase was primarily due to higher pre-tax earnings, partially offset by an increase in PTCs.

Southern Power's effective tax benefit rate was (57.1)% for the three months ended March 31, 2024 compared to (20.7)% for the corresponding period in 2023. The effective tax rate decrease was primarily due to an increase in PTCs and lower pre-tax earnings.