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Income Taxes
 12 Months Ended
Dec. 31, 2024
Income Tax Disclosure [Abstract]  
Income Taxes Income Taxes
The income tax provision consisted of the following amounts:
 Year Ended December 31,
(In millions, except effective income tax rate)202420232022
Current   
U.S. Federal$55 $26 $3 
State82 84 65 
Foreign5 (12)3 
Total — current142 98 71 
Deferred 
U.S. Federal333 50 258 
State(134)(61)59 
Foreign(18)(98)54 
Total — deferred181 (109)371 
Total income tax expense/(benefit)$323 $(11)$442 
Effective income tax rate22.3 %5.2 %26.6 %
The IRA enacted on August 16, 2022, introduced new provisions including a 15% corporate alternative minimum tax and a 1% excise tax on net share repurchases with both taxes effective beginning in fiscal year 2023 for NRG. On September 12, 2024, Treasury and the IRS released proposed regulations that provide guidance on the application of the CAMT. The proposed regulations allow the exclusion of unrealized mark-to-market gains and losses, related to qualified hedge transactions, from adjusted financial statement income. The Company will continue to evaluate the applicable corporation status and the impact of the CAMT based on the proposed guidance. As of December 31, 2024, NRG as an applicable corporation is subject to the CAMT, and has reflected the impact in its current and deferred taxes. There is no impact on the Company’s provision for income taxes from the CAMT as of December 31, 2024.
The following represented the domestic and foreign components of income/(loss) before income taxes:
 Year Ended December 31,
(In millions)202420232022
U.S. $1,485 $261 $1,436 
Foreign(37)(474)227 
Total$1,448 $(213)$1,663 
Reconciliations of the U.S. federal statutory tax rate to NRG's effective tax rate were as follows:
 Year Ended December 31,
(In millions, except effective income tax rate)202420232022
Income/(Loss) before income taxes$1,448 $(213)$1,663 
Tax at federal statutory tax rate304 (45)349 
State taxes92 (22)69 
Foreign rate differential 1 (10)7 
Changes in state valuation allowances(110)42 (3)
Nondeductible loss on Convertible Senior Notes repurchases56 — — 
Permanent differences23 31 17 
Stock compensation(19)— — 
Recognition of uncertain tax benefits1 12 8 
Deferred impact of state tax rate changes(24)3 14 
Foreign tax refunds— (17)— 
Return to provision adjustments(1)(5)— 
Carbon capture tax credits— — (19)
Income tax expense/(benefit)$323 $(11)$442 
Effective income tax rate22.3 %5.2 %26.6 %
For the year ended December 31, 2024, NRG's effective income tax rate was higher than the federal statutory tax rate of 21% primarily due to permanent differences and state tax expense partially offset by tax benefits from the revaluation of state deferred tax assets, and decrease of certain state valuation allowances.
For the year ended December 31, 2023, NRG's effective income tax rate was lower than the federal statutory tax rate of 21% primarily due to permanent differences and changes in state valuation allowances.
For the year ended December 31, 2022, NRG's effective income tax rate was higher than the federal statutory tax rate of 21% primarily due to state tax expense partially offset by the recognition of carbon capture tax credits.
The temporary differences, which gave rise to the Company's deferred tax assets and liabilities consisted of the following:
 As of December 31,
(In millions)20242023
Deferred tax assets:  
U.S. Federal net operating loss carryforwards$1,477 $1,762 
State net operating loss carryforwards341 367 
Foreign net operating loss carryforwards106 110 
Deferred revenues335 347 
Difference between book and tax basis of property322 353 
Federal and state tax credit carryforwards269 317 
Deferred compensation, accrued vacation and other reserves174 141 
Interest disallowance carryforward per §163(j) of the Tax Act77 132 
Pension and other postretirement benefits46 48 
Allowance for credit losses37 35 
Equity compensation30 24 
Federal benefit on state uncertain tax positions13 13 
Inventory obsolescence13 11 
U.S. capital loss1 1 
Other46 33 
Total deferred tax assets3,287 3,694 
Deferred tax liabilities:
Intangibles amortization (excluding goodwill)486 726 
Derivatives193 156 
Capitalized contract costs249 131 
Equity method investments88 93 
Goodwill56 40 
Debt discount amortization— 26 
Emissions allowances16 18 
Total deferred tax liabilities1,088 1,190 
Total deferred tax assets less deferred tax liabilities 2,199 2,504 
Valuation allowance(144)(275)
Total net deferred tax assets, net of valuation allowance$2,055 $2,229 
The following table summarizes NRG's net deferred tax position as presented in the consolidated balance sheets:
 As of December 31,
(In millions)20242023
Deferred tax asset $2,067 $2,251 
Deferred tax liability(12)(22)
Net deferred tax asset$2,055 $2,229 
The primary drivers for the decrease in the net deferred tax asset from $2.2 billion as of December 31, 2023 to $2.1 billion as of December 31, 2024 is due to utilization of net operating losses, partially offset by the decrease of certain state valuation allowances.
Deferred tax assets and valuation allowance
Net deferred tax balance — As of December 31, 2024 and 2023, NRG recorded a net deferred tax asset, excluding valuation allowance, of $2.2 billion and $2.5 billion, respectively. The Company believes certain state net operating losses may not be realizable under the more-likely-than-not measurement and as such, a valuation allowance was recorded as of December 31, 2024 as discussed below.
NOL carryforwards — As of December 31, 2024, the Company had tax-effected cumulative U.S. NOLs consisting of carryforwards for federal and state income tax purposes of $1.5 billion and $341 million, respectively. In addition, NRG has tax-effected cumulative foreign NOL carryforwards of $106 million. The majority of NRG's NOL carryforwards have no expiration date.
Valuation allowance — As of December 31, 2024, the Company's tax-effected valuation allowance was $144 million, consisting of state NOL carryforwards and foreign NOL carryforwards. The valuation allowance was recorded based on the assessment of cumulative and forecasted pre-tax book earnings and the future reversal of existing taxable temporary differences.
Taxes Receivable and Payable
As of December 31, 2024, NRG recorded a current federal payable of $1 million, a current net state receivable of $1 million and a current net foreign receivable of $8 million.
Uncertain tax benefits
NRG has identified uncertain tax benefits with after-tax value of $57 million and $73 million as of December 31, 2024 and 2023, for which NRG has recorded a non-current tax liability of $62 million and $76 million, respectively. The Company recognizes interest and penalties related to uncertain tax benefits in income tax expense. The Company recognized $2 million of interest expense for the year ended December 31, 2024, and $1 million for the years ended December 31, 2023 and 2022. As of December 31, 2024 and 2023, NRG had cumulative interest and penalties related to these uncertain tax benefits of $5 million and $3 million, respectively.
Tax jurisdictions — NRG is subject to examination by taxing authorities for income tax returns filed in the U.S. federal jurisdiction and various state and foreign jurisdictions including operations located in Australia and Canada.
The Company is no longer subject to U.S. federal income tax examinations for years prior to 2021. With few exceptions, state and Canadian income tax examinations are no longer open for years before 2015.
The following table summarizes uncertain tax benefits activity:
 As of December 31,
(In millions)20242023
Balance as of January 1$73 $22 
Increase due to current year positions12 28 
Increase due to acquired balance from Vivint Smart Home— 23 
Settlements, payments and statute closure(28)— 
Uncertain tax benefits as of December 31$57 $73