GEORGIA POWER 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 19.0% for the nine months ended September 30, 2024 compared to 13.9% 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, higher pre-tax earnings, and an increase in the valuation allowance on certain state tax credit carryforwards at Georgia Power, partially offset by an increase in PTCs and the recognition of certain state tax positions from amended returns primarily at Georgia Power. See "Unrecognized Tax Benefits" herein for additional information.

Alabama Power's effective tax rate was 21.2% for the nine months ended September 30, 2024 compared to 8.3% 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 18.7% for the nine months ended September 30, 2024 compared to 18.2% for the corresponding period in 2023. The effective tax rate increase was primarily due to higher pre-tax earnings and an increase in the valuation allowance on certain state tax credit carryforwards, partially offset by an increase in PTCs and the recognition of certain state tax positions from amended returns. See "Unrecognized Tax Benefits" herein for additional information.

Mississippi Power's effective tax rate was 20.0% for the nine months ended September 30, 2024 compared to 16.9% 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.

Unrecognized Tax Benefits

Southern Company's and Georgia Power's unrecognized tax position balances at September 30, 2024 were $73 million and $34 million, respectively, compared to $116 million and $77 million, respectively, at December 31,

2023. The decreases from prior periods are primarily related to the 2019 and 2020 amended state filing positions related to tax credit utilization and decreased Southern Company's and Georgia Power's effective tax rates.