Company: AILIM
Filing Date: 2025-11-06
Form Type: 10-Q
Source: 0001002910-25-000129
Chunk: 30

Company: Ameren Illinois Co
Filing Date: 2025-11-06
Form: 10-Q
Item: Part I, Item 2
Chunk 30
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 rate order. Lower deferrals due to the inclusion in base rates of interest associated with certain property, plant, and equipment previously deferred under the PISA and RESRAM increased interest charges by $4 million in the three months ended September 30, 2025. 

The above increases were partially offset by interest charges that reflected a deferral to a regulatory asset of interest associated with investments in eligible property, plant and equipment not yet reflected in rates pursuant to PISA and RESRAM, which decreased interest charges by $22 million in the nine months ended September 30, 2025. 

Ameren Illinois

Interest charges were comparable in the three months ended September 30, 2025, and increased $14 million in the nine months ended September 30, 2025, compared with the year-ago periods, primarily due to the following:

Ameren Illinois Transmission

Interest charges were comparable in the three months ended September 30, 2025, and increased by $6 million in the nine months ended September 30, 2025, compared with the year-ago periods, primarily because of issuances of long-term debt in June 2024 and March 2025, which increased interest expense by $10 million. The increases were partially offset by decreased levels of interest charges associated with short-term debt of $3 million.

Ameren Illinois Electric Distribution

 Interest charges increased by $3 million and $7 million in the three and nine months ended September 30, 2025, respectively, primarily because of issuances of long-term debt in June 2024 and March 2025, which increased interest expense by $2 million and $12 million, respectively. The increases in the nine months ended September 30, 2025 were partially offset by $2 million due to decreased levels of borrowing on short-term debt and by $2 million due to the maturity of senior secured notes in March 2025.

Ameren Illinois Natural Gas

Interest charges were comparable between periods.

Income Taxes

The following table presents effective income tax rates for the three and nine months ended September 30, 2025 and 2024:

Three Months(a)Nine Months(a)2025202420252024Ameren7 %11 %11 %13 %Ameren Missouri6 %(2)%6 %(1)%Ameren Illinois10 %24 %20 %24 %Ameren Illinois Electric Distribution