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Income Tax (Tables)
9 Months Ended
Sep. 30, 2025
Income Tax Disclosure [Abstract]  
Schedule of Income Tax Reconciliation
Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the three months ended September 30, 2025 and 2024 is as follows:
For the Three Months Ended September 30,
Con EdisonCECONY
2025202420252024
(Millions of Dollars) (% of Pre-tax income)$%$%$%$%
STATUTORY TAX RATE
Federal$18721.0 %$15221.0 %$17321.0 %$13821.0 %
Changes in computed taxes resulting from:
State income taxes, net of federal income taxes (a)475.3 395.5 435.2 345.2 
MTA Surcredit amortization, net of federal taxes(5)(0.6)— (5)(0.6)10.2 
Tax Credits(4)(0.5)(7)(1.0)(3)(0.4)(4)(0.6)
Changes in unrecognized tax benefits10.1 10.1 10.1 10.1 
Amortization of excess deferred federal income taxes (b)(11)(1.3)(50)(6.9)(9)(1.1)(48)(7.4)
Allowance for uncollectible accounts, net of regulatory recovery(15)(1.6)(10)(1.4)(15)(1.8)(9)(1.4)
Cost of removal101.1 101.4 91.1 91.4 
Other(8)(0.8)(2)(0.2)(7)(0.8)(3)(0.3)
Effective tax rate$20222.7%$13318.5 %$18722.7%$11918.2%
(a) State income taxes in New York account for the majority of the tax effect in this category.
(b)    For CECONY, the amortization of excess deferred federal income taxes is lower in the three months ended September 30, 2025, due to the completion of regulatory amortization of non-plant and certain plant-related excess deferred federal income taxes as of December 31, 2024, representing an accelerated refund of the related regulatory liability under its current New York electric and gas rate plans.

Con Edison’s income tax expense was $493 million and $307 million for the nine months ended September 30, 2025 and 2024, respectively.

CECONY’s income tax expense was $462 million and $301 million for the nine months ended September 30, 2025 and 2024, respectively.

Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the nine months ended September 30, 2025 and 2024 is as follows:
For the Nine Months Ended September 30,
Con EdisonCECONY
2025202420252024
(Millions of Dollars) (% of Pre-tax income)$%$%$%$%
STATUTORY TAX RATE
Federal$46621.0 %$38221.0 %$43421.0 %$36121.0 %
Changes in computed taxes resulting from:
State income taxes, net of federal income taxes (a)1165.2 915.0 108.05.2 89.05.2 
MTA Surcredit amortization, net of federal taxes(26)(1.2)(2)(0.1)(25.0)(1.2)(1.0)(0.1)
Tax Credits(13)(0.6)(20)(1.1)(10.0)(0.5)(10.0)(0.6)
Changes in unrecognized tax benefits20.1 20.1 2.00.2 2.00.1 
Amortization of excess deferred federal income taxes (b)(34)(1.5)(152)(8.3)(28.0)(1.3)(147.0)(8.5)
Allowance for uncollectible accounts, net of regulatory recovery(36)(1.6)(14)(0.8)(36.0)(1.8)(13.0)(0.8)
Cost of removal291.3 301.7 26.01.3 27.01.6 
Other(11)(0.5)(10)(0.6)(9)(0.5)(7)(0.4)
Effective tax rate$49322.2%$30716.9%$46222.4%$30117.5%
(a)    State income taxes in New York account for the majority of the tax effect in this category.
(b)    For CECONY, the amortization of excess deferred federal income taxes is lower in the nine months ended September 30, 2025, due to the completion of regulatory amortization of non-plant and certain plant-related excess deferred federal income taxes as of December 31, 2024, representing an accelerated refund of the related regulatory liability under its current New York electric and gas rate plans.