Income Taxes
The components of income (loss) before income taxes for each of the three years ended December 31, 2025 and income tax expense (benefit) attributable thereto are as follows:

 Years Ended December 31,
(Millions of dollars)202520242023
Income (loss) before income taxes$609.2 $651.6 $734.4 
Income tax expense (benefit)   
Federal - Current$70.1 $115.5 $141.5 
Federal - Deferred48.4 11.8 3.5 
State - Current and deferred20.1 21.8 32.6 
Total income tax expense (benefit)$138.6 $149.1 $177.6 

The following table reconciles the Company income tax expense (benefit) based on the U.S. statutory tax rate to the income tax expense (benefit) for the year ended December 31, 2025, after the adoption of ASU 2023-09.

(Millions of dollars)AmountPercent
Income tax expense (benefit) based on the U.S. statutory tax rate$127.9 21.0 %
Domestic federal
Tax Credits(8.0)(1.3)%
Nontaxable and nondeductible items2.0 0.3 %
Other reconciling items0.2 — %
Domestic state and local income taxes, net of federal effect16.5 2.8 %
Total income tax expense (benefit)$138.6 22.8 %
In 2025, state and local income taxes in New Jersey, Florida, Alabama, Georgia and Tennessee comprised the majority of the domestic state and local income taxes, net of federal effect category.

The following table reconciles income taxes based on the U.S. statutory tax rate to the Company’s income tax expense (benefit) for the years ended December 31, 2024 and 2023, prior to the adoption of ASU 2023-09.

 Years Ended December 31,
(Millions of dollars)20242023
Income tax expense based on the U.S. statutory tax rate$136.8 $154.2 
State income taxes, net of federal benefit17.3 25.0 
Federal credits(2.5)(2.6)
Other, net(2.5)1.0 
Total$149.1 $177.6 
Cash income taxes paid, net of refunds, for the year ended December, 31, 2025, was as follows:

(Millions of dollars)Amount
US federal$86.0 
US state and local15.0 
Total$101.0 

Cash income taxes paid, net of refunds, were $109.5 million and $128.0 million for the years ended December 31, 2024 and 2023, respectively.
An analysis of the Company’s deferred tax assets and deferred tax liabilities at December 31, 2025 and 2024 showing the tax effects of significant temporary differences is as follows:

 December 31,
(Millions of dollars)20252024
Deferred tax assets  
Property costs and asset retirement obligations$8.1 $7.3 
Employee benefits12.4 11.7 
Operating leases liability117.7 109.2 
Other deferred tax assets15.0 15.9 
Total gross deferred tax assets153.2 144.1 
Deferred tax liabilities  
Accumulated depreciation and amortization(383.0)(344.5)
State deferred taxes(28.6)(31.2)
Operating leases right-of-use assets(110.5)(103.5)
Other deferred tax liabilities(19.6)(8.3)
Total gross deferred tax liabilities(541.7)(487.5)
Net deferred tax liabilities$(388.5)$(343.4)

In management’s judgment, the deferred tax assets in the preceding table will more likely than not be realized as reductions of future taxable income or utilized by available tax planning strategies.

As of December 31, 2025, the earliest year remaining open for federal audits and/or settlement is 2022 and for state audits and/or settlement is 2020. Although the Company believes that recorded liabilities for unsettled issues are adequate, additional gains or losses could occur in future periods from resolution of outstanding unsettled matters.
The FASB’s rules for accounting for income tax uncertainties clarify the criteria for recognizing uncertain income tax benefits and require additional disclosures about uncertain tax positions.  Under U.S. GAAP the financial statement recognition of the benefit for a tax position is dependent upon the benefit being more likely than not to be sustainable upon audit by the applicable taxing authority. If this threshold is met, the tax benefit is then measured and recognized at the largest amount that is greater than 50 percent likely of being realized upon ultimate settlement. Liabilities associated with uncertain income tax positions are included in Deferred Credits and Other Liabilities in the Consolidated Balance Sheets. 

A reconciliation of the beginning and ending amount of the consolidated liability for unrecognized income tax benefits during the year ended December 31, 2025 and 2024 is shown in the following table:

 Years Ended December 31,
(Millions of dollars)20252024
Balance at January 1$— $0.5 
Additions for tax positions related to prior years— — 
Expiration of statutes of limitation— (0.5)
Balance at December 31$— $— 

All additions or reductions to the above liability affect the Company’s effective tax rate in the respective period of change.  The Company accounts for any applicable interest and penalties on uncertain tax positions as a component of income tax expense.  Income tax expense for the years ended December 31, 2025, 2024 and 2023 included immaterial amounts of interest and penalties, associated with uncertain tax positions.  Of these amounts shown in the table, there were no unrecognized tax benefits that, if recognized, would impact our effective tax rate for the years ended December 31, 2025 and 2024, respectively.
Total excess tax benefits for equity compensation recognized in the twelve months ended December 31, 2025, 2024 and 2023 were $2.9 million, $5.0 million and $2.9 million, respectively.

Historical Timeline

Fiscal YearFiled
2025Feb 18, 2026Showing above
2024Feb 20, 2025
2023Feb 16, 2024
2022Feb 15, 2023
2021Feb 17, 2022
2020Feb 19, 2021
2019Feb 18, 2020
2018Feb 19, 2019
2017Feb 20, 2018
2016Feb 22, 2017
2015Feb 26, 2016

About Income Taxes Disclosures

The income tax disclosure reveals how much a company actually pays in taxes versus what the statutory rate would predict. Analysts focus on the effective tax rate (ETR) reconciliation, which breaks down every item driving the gap between the 21% federal rate and the company's reported ETR — including R&D credits, foreign rate differentials, and state taxes. Deferred tax assets (DTAs) and their valuation allowances signal management's confidence in future profitability: a rising allowance suggests the company doubts it can use accumulated tax benefits. Uncertain tax benefit (UTB) reserves quantify exposure to IRS challenges on aggressive positions.

Key signals to watch: sudden ETR drops without clear operational reasons, large increases in valuation allowances, growing UTB balances, and significant unremitted foreign earnings. Post-TCJA, pay attention to GILTI and BEAT provisions that affect multinational tax structures. Compare the cash taxes paid (from the cash flow statement) against the income tax provision to gauge earnings quality.