Income Taxes (Tables)

12 Months Ended

Dec. 31, 2024

Schedule Of Effective Income Tax Rate Reconciliation

The following table presents the principal reasons for the difference between the effective income tax rate and the federal statutory corporate income tax rate for the years ended December 31, 2024, 2023, and 2022:


	Ameren Missouri		Ameren Illinois		Ameren
2024
Federal statutory corporate income tax rate	21	%	21	%	21	%
Increases (decreases) from:
Amortization of excess deferred income taxes(a)	(17)		(4)		(9)

Amortization of deferred investment tax credit	(1)		—		—
Renewable and other tax credits(b)	(24)		—		(9)
State tax	3		7		5
Depreciation differences	—		—		(1)

Effective income tax rate	(18)	%	24	%	7	%
2023
Federal statutory corporate income tax rate	21	%	21	%	21	%
Increases (decreases) from:
Amortization of excess deferred income taxes(a)	(15)		(2)		(8)

Amortization of deferred investment tax credit	(1)		—		—
Renewable and other tax credits(b)	(10)		—		(4)
State tax	3		7		5


Effective income tax rate	(2)	%	26	%	14	%
2022
Federal statutory corporate income tax rate	21	%	21	%	21	%
Increases (decreases) from:
Amortization of excess deferred income taxes(a)	(15)		(2)		(8)

Amortization of deferred investment tax credit	(1)		—		—
Renewable and other tax credits(b)	(10)		—		(4)
State tax	3		7		5

Effective income tax rate	(2)	%	26	%	14	%

(a)Reflects the amortization of a regulatory liability resulting from the revaluation of accumulated deferred income taxes subject to regulatory ratemaking, which are being refunded to customers.

(b)The benefit of the credits associated with Missouri renewable energy standard compliance is refunded to customers through the RESRAM. The benefit of the credits associated with the production and investment tax credit tracker will be refunded to customers based on MoPSC approval in a regulatory rate review.

Schedule Of Components Of Income Tax Expense (Benefit)

The following table presents the components of income tax expense (benefit) for the years ended December 31, 2024, 2023, and 2022:


	Ameren Missouri		Ameren Illinois		Other		Ameren
2024
Current taxes:
Federal	$	(55)	$	5	$	7	$	(43)
State	(3)		—		2		(1)
Deferred taxes:
Federal	45		144		(12)		177
State	8		76		(19)		65
Amortization of excess deferred income taxes	(79)		(32)		(1)		(112)
Amortization of deferred investment tax credits	(3)		—		—		(3)
Total income tax expense (benefit)	$	(87)	$	193	$	(23)	$	83
2023
Current taxes:
Federal	$	(37)	$	27	$	(37)	$	(47)
State	1		5		(5)		1
Deferred taxes:
Federal	102		123		35		260
State	9		71		(10)		70
Amortization of excess deferred income taxes	(80)		(17)		(1)		(98)
Amortization of deferred investment tax credits	(3)		—		—		(3)
Total income tax expense (benefit)	$	(8)	$	209	$	(18)	$	183
2022
Current taxes:
Federal	$	(26)	$	46	$	(15)	$	5
State	(5)		16		(10)		1
Deferred taxes:
Federal	93		82		19		194
State	18		48		14		80
Amortization of excess deferred income taxes	(86)		(13)		(1)		(100)
Amortization of deferred investment tax credits	(4)		—		—		(4)
Total income tax expense (benefit)	$	(10)	$	179	$	7	$	176

Schedule Of Deferred Tax Assets And Liabilities Resulting From Temporary Differences

The following table presents the accumulated deferred income tax assets and liabilities recorded as a result of temporary differences and accumulated deferred production and investment tax credits at December 31, 2024 and 2023:


	Ameren Missouri		Ameren Illinois		Other		Ameren
2024
Accumulated deferred income taxes, net liability (asset):
Plant-related	$	2,429	$	2,250	$	261	$	4,940
Regulatory assets and liabilities, net	(193)		(170)		(22)		(385)
Deferred employee benefit costs	(25)		77		(25)		27
Tax carryforwards	(355)		(45)		(103)		(503)
Other	131		28		3		162
Total net accumulated deferred income tax liabilities (assets)	1,987		2,140		114		4,241
Accumulated deferred investment tax credits	230		3		—		233
Accumulated deferred income taxes and investment tax credits	$	2,217	$	2,143	$	114	$	4,474
2023
Accumulated deferred income taxes, net liability (asset):
Plant-related	$	2,370	$	2,030	$	246	$	4,646
Regulatory assets and liabilities, net	(206)		(184)		(23)		(413)
Deferred employee benefit costs	(48)		55		(33)		(26)
Tax carryforwards	(124)		(33)		(61)		(218)
Other	104		38		19		161
Total net accumulated deferred income tax liabilities (assets)	2,096		1,906		148		4,150
Accumulated deferred investment tax credits	26		—		—		26
Accumulated deferred income taxes and investment tax credits	$	2,122	$	1,906	$	148	$	4,176

Schedule Of Net Operating Loss Carryforwards And Tax Credit Carryforwards

The following table presents the components of accumulated deferred income tax assets relating to net operating loss carryforwards and tax credit carryforwards at December 31, 2024 and 2023:


	Ameren Missouri		Ameren Illinois		Other		Ameren
2024
Net operating loss carryforwards:
Federal(a)	$	—	$	—	$	30	$	30
State(b)	—		34		29		63
Total net operating loss carryforwards	$	—	$	34	$	59	$	93
Tax credit carryforwards:
Federal(c)	$	355	$	9	$	44	$	408
State(d)	—		2		—		2

Total tax credit carryforwards	$	355	$	11	$	44	$	410



2023
Net operating loss carryforwards:
Federal	$	—	$	—	$	—	$	—
State	—		26		16		42
Total net operating loss carryforwards	$	—	$	26	$	16	$	42
Tax credit carryforwards:
Federal	$	124	$	5	$	45	$	174
State	—		2		—		2

Total tax credit carryforwards	$	124	$	7	$	45	$	176

(a)No expiration date.

(b)Will expire between 2032 and 2044.

(c)Will expire between 2031 and 2044.

(d)Will expire between 2025 and 2028.