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Income Taxes (Tables)
 9 Months Ended
Sep. 30, 2024
Schedule of Effective Income Tax Rate Reconciliation
Three Months Ended September 30, 2024
AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
U.S. Federal Statutory Rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
Increase (decrease) due to:
State and Local Income Taxes, Net0.6 %0.3 %2.5 %1.4 %0.7 %1.1 %— %(2.6)%
Tax Reform Excess ADIT Reversal
(2.8)%(1.0)%0.2 %(2.3)%(7.9)%(7.3)%(5.0)%(3.2)%
Production and Investment Tax Credits
(9.9)%— %— %(0.1)%(45.6)%— %(61.9)%(23.4)%
Reversal of Origination Flow-Through0.1 %0.1 %0.3 %(1.1)%0.3 %0.7 %0.3 %0.6 %
AFUDC Equity(1.5)%(2.3)%(1.9)%(1.5)%(1.2)%(1.2)%(1.3)%(0.5)%
Discrete Tax Adjustments
(3.7)%— %— %— %— %— %— %— %
Other
— %0.2 %(0.2)%(0.4)%— %0.6 %1.5 %— %
Effective Income Tax Rate3.8 %18.3 %21.9 %17.0 %(32.7)%14.9 %(45.4)%(8.1)%

Three Months Ended September 30, 2023
AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
U.S. Federal Statutory Rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
Increase (decrease) due to:
State and Local Income Taxes, Net1.4 %0.5 %2.8 %2.2 %2.1 %0.8 %3.0 %(4.3)%
Tax Reform Excess ADIT Reversal(5.7)%(1.3)%(0.2)%(5.3)%(8.5)%(6.8)%(17.0)%(6.2)%
Production and Investment Tax Credits
(5.1)%0.1 %— %(0.1)%(0.7)%— %(46.9)%(25.5)%
Reversal of Origination Flow-Through0.1 %0.2 %0.3 %1.8 %0.7 %0.8 %0.3 %(0.2)%
AFUDC Equity(1.4)%(1.4)%(2.4)%(1.5)%(0.5)%(0.8)%(1.6)%(0.8)%
Discrete Tax Adjustments(4.1)%— %— %— %— %— %— %— %
Other
0.1 %(0.5)%(1.0)%0.7 %(3.5)%1.3 %(0.2)%0.2 %
Effective Income Tax Rate6.3 %18.6 %20.5 %18.8 %10.6 %16.3 %(41.4)%(15.8)%
Nine Months Ended September 30, 2024
AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
U.S. Federal Statutory Rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
Increase (decrease) due to:
State and Local Income Taxes, Net1.2 %0.4 %2.5 %2.1 %1.5 %0.9 %— %(2.6)%
Tax Reform Excess ADIT Reversal
(3.1)%(1.1)%0.2 %(7.1)%(5.7)%(8.7)%(4.3)%(4.2)%
Remeasurement of Excess ADIT(11.9)%1.5 %— %— %(27.5)%— %(40.5)%(181.8)%
Production and Investment Tax Credits
(8.3)%(0.1)%— %(0.1)%(23.4)%— %(61.7)%(79.1)%
Reversal of Origination Flow-Through0.2 %0.1 %0.3 %(0.8)%0.3 %0.8 %0.3 %2.1 %
AFUDC Equity(1.6)%(1.7)%(2.0)%(1.1)%(1.1)%(1.3)%(1.3)%(2.3)%
Discrete Tax Adjustments
(2.1)%— %— %— %— %— %1.2 %1.1 %
Other
0.2 %— %(0.1)%(0.1)%— %0.4 %— %(0.5)%
Effective Income Tax Rate(4.4)%20.1 %21.9 %13.9 %(34.9)%13.1 %(85.3)%(246.3)%

Nine Months Ended September 30, 2023
AEPAEP TexasAEPTCoAPCoI&MOPCoPSOSWEPCo
U.S. Federal Statutory Rate21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %21.0 %
Increase (decrease) due to:
State and Local Income Taxes, Net1.7 %0.5 %2.7 %2.4 %2.3 %0.9 %2.8 %(2.9)%
Tax Reform Excess ADIT Reversal
(6.0)%(1.3)%0.1 %(4.8)%(7.6)%(7.3)%(17.1)%(5.3)%
Production and Investment Tax Credits
(7.4)%— %— %(0.1)%(0.6)%— %(48.9)%(26.7)%
Reversal of Origination Flow-Through(0.2)%0.2 %0.3 %0.1 %(1.7)%0.8 %0.3 %(0.3)%
AFUDC Equity(1.4)%(1.2)%(2.0)%(1.2)%(0.4)%(0.8)%(1.5)%(0.5)%
Discrete Tax Adjustments(2.8)%— %— %1.5 %0.7 %— %— %— %
Other
0.3 %(0.2)%(0.5)%0.4 %(1.2)%0.5 %(0.2)%0.2 %
Effective Income Tax Rate5.2 %19.0 %21.6 %19.3 %12.5 %15.1 %(43.6)%(14.5)%