WESTLAKE CORP Income Taxes Disclosure
| Year Ended December 31, | ||||||||||||||||||||
| 2025 | 2024 | 2023 | ||||||||||||||||||
| Domestic | $ | (1,455) | $ | 855 | $ | 923 | ||||||||||||||
| Foreign | (142) | 83 | (223) | |||||||||||||||||
| $ | (1,597) | $ | 938 | $ | 700 | |||||||||||||||
| Year Ended December 31, | ||||||||||||||||||||
| 2025 | 2024 | 2023 | ||||||||||||||||||
| Current | ||||||||||||||||||||
| Federal | $ | (16) | $ | 215 | $ | 229 | ||||||||||||||
| State | 3 | 24 | 26 | |||||||||||||||||
| Foreign | 64 | 87 | 98 | |||||||||||||||||
Total current | 51 | 326 | 353 | |||||||||||||||||
| Deferred | ||||||||||||||||||||
| Federal | (150) | (58) | (82) | |||||||||||||||||
| State | (6) | 35 | (31) | |||||||||||||||||
| Foreign | (21) | (12) | (62) | |||||||||||||||||
Total deferred | (177) | (35) | (175) | |||||||||||||||||
| Total provision for (benefit from) income taxes | $ | (126) | $ | 291 | $ | 178 | ||||||||||||||
Year Ended December 31, 2025 | ||||||||||||||
Amount | Percentage | |||||||||||||
| U.S. federal statutory income tax rate | $ | (335) | 21.0 | % | ||||||||||
| State and local income tax, net of federal income tax effect | (2) | 0.1 | % | |||||||||||
| Foreign tax effects | ||||||||||||||
| Canada | ||||||||||||||
| Provincial taxes | 23 | (1.4) | % | |||||||||||
| Other Canada | (9) | 0.6 | % | |||||||||||
| Netherlands | ||||||||||||||
| Changes in valuation allowance | 79 | (4.9) | % | |||||||||||
| Other Netherlands | (15) | 0.9 | % | |||||||||||
| Other foreign jurisdictions | (1) | 0.1 | % | |||||||||||
| Tax credits | (14) | 0.9 | % | |||||||||||
| Nontaxable and nondeductible items | ||||||||||||||
| Goodwill impairment | 151 | (9.5) | % | |||||||||||
| Other | 1 | (0.1) | % | |||||||||||
| Worldwide changes in unrecognized tax benefits | 1 | (0.1) | % | |||||||||||
| Other adjustments | ||||||||||||||
| Noncontrolling interest | (6) | 0.4 | % | |||||||||||
| Other | 1 | (0.1) | % | |||||||||||
| Effective Tax Rate | $ | (126) | 7.9 | % | ||||||||||
| Year Ended December 31, | ||||||||||||||
| 2024 | 2023 | |||||||||||||
| Provision for federal income tax, at statutory rate | $ | 197 | $ | 148 | ||||||||||
| State income tax provision, net of federal income tax effect | 6 | 7 | ||||||||||||
| Foreign income tax rate differential | 7 | (15) | ||||||||||||
| Noncontrolling interests | (9) | (7) | ||||||||||||
| Change in valuation allowance | 62 | 76 | ||||||||||||
| U.S. federal research and development credits | (16) | (54) | ||||||||||||
Uncertain Income Tax Positions | 9 | 14 | ||||||||||||
Goodwill impairment | — | 26 | ||||||||||||
Change in state apportionment and tax rates | 45 | (6) | ||||||||||||
| Other, net | (10) | (11) | ||||||||||||
| Total income tax expense | $ | 291 | $ | 178 | ||||||||||
Year Ended December 31, 2025 | ||||||||
| US federal | $ | 19 | ||||||
| US state and local | 8 | |||||||
| Foreign | ||||||||
| Canada | 53 | |||||||
Taiwan | 6 | |||||||
Korea | 6 | |||||||
| Other | 12 | |||||||
| 77 | ||||||||
| Income Taxes Paid, net of Refunds Received | $ | 104 | ||||||
| 2025 | 2024 | |||||||||||||
| Net operating loss carryforward | $ | 524 | $ | 230 | ||||||||||
| Credit carryforward | 30 | 28 | ||||||||||||
| Operating lease liabilities | 202 | 202 | ||||||||||||
| Accruals | 106 | 110 | ||||||||||||
| Pension | 20 | 42 | ||||||||||||
| Inventories | 39 | 36 | ||||||||||||
| Research and experimental expenditures | 112 | 154 | ||||||||||||
| Other | 87 | 36 | ||||||||||||
| Deferred taxes assets—total | 1,120 | 838 | ||||||||||||
| Property, plant and equipment | (1,242) | (1,259) | ||||||||||||
| Intangibles | (247) | (226) | ||||||||||||
| Operating lease right-of-use asset | (195) | (191) | ||||||||||||
| Turnaround costs | (52) | (53) | ||||||||||||
| Consolidated partnerships | (165) | (202) | ||||||||||||
| Equity method investments | (224) | (236) | ||||||||||||
| Other | (33) | (29) | ||||||||||||
| Deferred tax liabilities—total | (2,158) | (2,196) | ||||||||||||
| Valuation allowance | (298) | (170) | ||||||||||||
| Total net deferred tax liabilities | $ | (1,336) | $ | (1,528) | ||||||||||
| Balance sheet classifications | ||||||||||||||
| Noncurrent deferred tax asset | $ | 7 | $ | 25 | ||||||||||
| Noncurrent deferred tax liability | (1,343) | (1,553) | ||||||||||||
| Total net deferred tax liabilities | $ | (1,336) | $ | (1,528) | ||||||||||
| Year Ended December 31 | ||||||||||||||||||||
| 2025 | 2024 | 2023 | ||||||||||||||||||
Valuation allowance, beginning of year | $ | 170 | $ | 118 | $ | 47 | ||||||||||||||
Additional allowances | 128 | 55 | 94 | |||||||||||||||||
Reversals & other changes | — | (3) | (23) | |||||||||||||||||
Valuation allowance, end of year | $ | 298 | $ | 170 | $ | 118 | ||||||||||||||
| Year Ended December 31 | ||||||||||||||||||||
| 2025 | 2024 | 2023 | ||||||||||||||||||
| Gross unrecognized tax benefits, beginning of year | $ | 42 | $ | 35 | $ | 24 | ||||||||||||||
| Additions for tax positions of current year | 3 | 7 | 6 | |||||||||||||||||
| Additions for tax positions of prior years | 1 | 1 | 15 | |||||||||||||||||
| Reductions for tax positions of prior years | (1) | — | (10) | |||||||||||||||||
| Lapse of statute of limitations | (3) | (1) | — | |||||||||||||||||
| Gross unrecognized tax benefits, end of year | $ | 42 | $ | 42 | $ | 35 | ||||||||||||||
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Historical Timeline
| Fiscal Year | Filed | |
|---|---|---|
| 2025 | Feb 26, 2026 | Showing above |
| 2024 | Feb 25, 2025 | |
| 2023 | Feb 22, 2024 | |
| 2022 | Feb 22, 2023 | |
| 2021 | Feb 23, 2022 | |
| 2020 | Feb 24, 2021 | |
| 2019 | Feb 19, 2020 | |
| 2018 | Feb 20, 2019 | |
| 2017 | Feb 21, 2018 | |
| 2016 | Feb 22, 2017 | |
| 2015 | Feb 24, 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.