Article

ASC 740: Year-end tax provision considerations for 2025

How tax law changes and disclosure rules affect 2025 reporting

January 13, 2026
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Federal tax Business tax Pillar two International tax

Executive summary: Updates and considerations for 2025 tax provisions

Businesses preparing 2025 income tax provisions under ASC 740 face major changes. The One Big Beautiful Bill Act (OBBBA) introduces immediate expensing for domestic R&D costs, restores 100% bonus depreciation, and reverts interest limitation rules to an EBITDA-based calculation—each impacting current and deferred tax computations. Companies must reassess valuation allowances, model temporary difference reversals, and evaluate credit carrybacks to optimize tax positions.

Additional considerations include IRS guidance on the corporate alternative minimum tax (CAMT), expanded disclosure requirements under ASU 2023-09, and state-level decoupling from federal law. Global developments—such as OECD Pillar Two safe harbors and country-specific tax changes—add complexity for multinational enterprises.

The following article highlights key income tax provision considerations, current issues in corporate tax, and updates for companies preparing income tax provisions for 2025. Read more about tax law changes in the U.S. and around the globe, updates from the Financial Accounting Standards Board, and other considerations for 2025 tax provisions below.


Income tax provision considerations for 2025

There were sweeping tax changes across the United States and key global jurisdictions in 2025. The OBBBA, new CAMT guidance, evolving global minimum tax (Pillar Two) rules, and a surge of accounting standards updates headline the changes requiring entities to carefully update their income tax provision calculations, valuation allowance assessments, and income tax disclosures.

For a look at tax law changes and ASC 740 considerations throughout the 2025 calendar year, consider the information below in conjunction with our updates from the first, second and third quarters of 2025.

Key tax law updates: The One Big Beautiful Bill Act

The OBBBA, enacted on July 4, 2025, introduced several federal tax law changes that may directly affect income tax provisions prepared under ASC 740. Many of these changes revert to more favorable tax rules that were in place immediately after the passage of the Tax Cuts and Jobs Act (TCJA) of 2017.

Three OBBBA provisions, in particular, will have notable impacts on corporations in 2025. The so-called Big Three consists of the following.


After enactment of the OBBBA, entities can immediately expense domestic R&D costs under section 174 but may elect to continue to capitalize and amortize these costs over 60 months. There is also an option to accelerate unamortized domestic section 174 costs for amounts incurred from 2022 to 2024.





 


The definition of adjusted taxable income (ATI) for section 163(j) has reverted to an EBITDA-type calculation, which could potentially increase the deductible interest expense for entities with significant fixed or intangible assets. The OBBBA also makes several additional changes to the section 163(j) calculation related to the exclusion of certain international tax items and introduces rules that modify the treatment of electively capitalized interest for years beginning after Dec. 31, 2025.


100% bonus depreciation is restored for qualified assets acquired on or after Jan. 20, 2025, with expanded eligibility for manufacturing buildings placed in service before Jan. 1, 2031.









 

Other notable items introduced or changed by the OBBBA were:

Under ASC 740, changes in tax law are recognized in financial statements in the period of enactment, regardless of the effective date. This principle applies across jurisdictions, each of which may have its own criteria for "enactment.” In the U.S., enactment occurs when the president signs the law.

For many entities, especially those without valuation allowances, the effects of the OBBBA in 2025 may result in lower taxable income, and a reduction in current tax payable and current tax expense. This would be accompanied by either a related reduction to deferred tax assets or increase in deferred tax liabilities, with an offsetting increase to deferred tax expense.

However, there could be secondary impacts on certain items, such as section 250 deductions, and minimum tax regimes, such as the base erosion and anti-abuse tax (BEAT) and corporate alternative minimum tax (CAMT). Calculations of those amounts rely on other aspects of taxable income, meaning they could be significantly impacted by changes to the Big Three (or other changing provisions) that are effective in 2025.

While the direct effect of the Big Three, as temporary differences, will not affect an entity’s effective tax rate (ETR), these potential secondary effects on permanent items would have an ETR impact.

For a detailed discussion on the impacts of tax reform on financial reporting, read our article: Accounting for the income tax impacts of the One Big Beautiful Bill Act.

Corporate alternative minimum tax (CAMT): Year-end compliance considerations

Several IRS notices, intended to provide interim guidance related to CAMT, were issued in 2025.

Want to learn more about how technology can help companies comply with ASU 2023-09?  Please see our article written with Bloomberg Tax: Technology Solutions for FASB ASU 2023-09 Compliance.

State tax

States continue to respond to the changes included in the OBBBA, however, many states did not yet enact changes to conform to the OBBBA prior to year-end. Therefore, companies should be aware that there may be numerous areas where states decouple from the current version of federal tax law, resulting in significant adjustments to state taxable income.

Global tax compliance updates: OECD Pillar Two and country-specific changes

Pillar Two and the “side-by-side” package

The Organisation for Economic Cooperation and Development (OECD) Inclusive Framework on Base Erosion and Profit Shifting (BEPS) issued a framework for the U.S. tax system to coexist with the Pillar Two rules.

The “side-by-side (SbS) package,” released on Jan. 5, 2026, is a comprehensive set of measures that 

provide several safe harbors for the Pillar Two rules. These measures have profound implications for U.S. multinational enterprises (MNEs), primarily exempting many of them from the main charging provisions of Pillar Two. 

Consistent with ASC 740, which requires companies to reflect the effects of changes in tax law in the period that includes the enactment date, financial statements for calendar years 2024 and 2025 remain unaffected by the SbS package because legislation has not yet been enacted in most jurisdictions.  Since Pillar Two is enacted through domestic legislation, a disconnect may occur between the timing of jurisdictions’ enactment of the SbS package and the years to which the safe harbors ultimately apply.

For accounting purposes, this could require companies to accrue top-up taxes in financial statements for periods ending before enactment, even if those liabilities may ultimately be reduced or eliminated once legislation implementing the SbS package is enacted.

The FASB indicated during 2023 that taxes under Pillar Two would be viewed similarly to an alternative minimum tax under ASC 740, and, therefore, deferred taxes would not be recognized or adjusted for the future effects of the Pillar Two minimum taxes. 

Accordingly, the SbS package is not expected to significantly affect U.S. companies’ financial statements for periods ending prior to Jan 5, 2025. U.S. companies may continue to be subject to qualified domestic minimum top-up taxes (QDMTTs) and should continue to account for such QDMTTs under ASC 740.  

Once the simplified effective tax rate safe harbor (SESH) becomes enacted and effective, companies should re-evaluate any uncertain tax positions related to top-up tax exposure. Companies may reasonably conclude that no Pillar Two tax liability is probable for qualifying jurisdictions, eliminating the need to measure top-up tax exposure under full Pillar Two mechanics. This significantly narrows the scope of jurisdictions requiring complex tax forecasting. 

Next Step: Companies should closely monitor legislative developments and evaluate and reflect the financial reporting implications of legislation as enacted in each applicable jurisdiction.

Next steps for year-end ASC 740 compliance

To prepare for 2025 year-end tax provisions, companies should consider taking the following actions:

  • Model the impact of OBBBA provisions on current and deferred taxes, including R&D expensing, bonus depreciation and interest limitations.
  • Reassess valuation allowances in light of temporary difference reversals and updated taxable income projections.
  • Review CAMT exposure and confirm eligibility for safe harbors under recent IRS notices.
  • Update financial statement disclosures to reflect tax law changes and comply with ASU 2023-09 requirements.
  • Evaluate state tax conformity with the OBBBA and identify potential decoupling adjustments.
  • Monitor global developments such as OECD Pillar Two safe harbors and country-specific legislative changes.
  • Engage tax advisors early to ensure accurate provision calculations and timely compliance.

RSM contributors

  • Cassie Conley
    Partner
  • Darian A. Harnish
    Partner
  • Kayla Thompson
    Kayla Thompson
    Manager

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