ASC 740 Checklist 2026: Step-by-Step Tax Provision Guide

If you are closing the books for a calendar-year public company right now, your ASC 740 income tax provision carries more compliance weight in 2026 than it has in years. ASU 2023-09 is mandatory for fiscal year 2025 financial statements, the Corporate Alternative Minimum Tax (CAMT) has been confirmed as an ASC 740 income tax by FASB staff, and Pillar Two top-up taxes must be evaluated under existing ASC 740 principles with no FASB exception to lean on. This checklist walks through every phase of the provision process in sequence, flags the 2026-specific wrinkles at each step, and calls out the errors that draw SEC comment letters.

Who this is for: Corporate tax directors, controllers, and provision preparers at calendar-year public companies filing 2025 10-Ks in early 2026, and private company teams deciding whether to early-adopt ASU 2023-09 ahead of their own effective date (fiscal years beginning after December 15, 2025).

What Is ASC 740 and Why Does It Matter in 2026?

ASC 740 (FASB Codification Topic 740, Income Taxes) is the U.S. GAAP framework governing how companies recognize, measure, present, and disclose the effects of income taxes on their financial statements. It covers current tax expense, deferred tax assets (DTAs) and liabilities (DTLs), valuation allowances, uncertain tax positions (UTPs), and intraperiod tax allocation. It applies only to taxes based on income, not sales, payroll, or property taxes, per ASC 740-10.

As Wipfli notes, "ASC 740 affects both your income statement (tax expense) and balance sheet (deferred tax assets and liabilities). For leaders, it matters because the provision can materially impact reported earnings, lender covenant calculations and the story your financial statements tell."

For a deeper dive into how the OBBBA's NCTI provisions interact with deferred tax remeasurement, see Finrep's NCTI Deferred Tax Restatement walkthrough.

Phase 1: Pre-Provision Setup

Before any numbers move, get the infrastructure right. Errors here cascade through every subsequent step.

1. Confirm filer category and applicable deadlines. Calendar-year large accelerated filers must file their 10-K within 60 days of fiscal year-end. The provision must be complete before the auditors sign off, which typically means the tax close runs two to four weeks ahead of the filing date.
2. Identify all tax jurisdictions. List every federal, state, local, and foreign jurisdiction where the entity has a filing obligation. Include jurisdictions where economic nexus or unitary filing rules apply, even if no return was filed in prior years. Remote-work arrangements and e-commerce activity continue to create new nexus exposure.
3. Confirm your GILTI accounting policy election. Under the 2018 FASB Staff Q&A, companies may account for GILTI either as a period cost or using the deferred method. This is an accounting policy election that must be disclosed and applied consistently. If you have not documented this policy formally, do it now.
4. Assess CAMT applicability. The Corporate Alternative Minimum Tax imposes a 15% minimum tax on adjusted financial statement income (AFSI) for corporations with average annual AFSI exceeding $1 billion over a three-year period, per IRS Notice 2023-07. FASB staff confirmed CAMT is an income tax within ASC 740's scope, meaning you must compute CAMT-related DTAs and DTLs and assess valuation allowances on them.
5. Assess Pillar Two exposure. For multinationals with annual revenues of EUR 750 million or more, determine whether any jurisdiction's effective tax rate falls below the 15% global minimum. Unlike the IASB (which issued a temporary mandatory exception to IAS 12 deferred tax accounting for Pillar Two in May 2023), FASB has not adopted an equivalent exception. U.S. GAAP preparers must evaluate Pillar Two top-up taxes under existing ASC 740 principles. Document your analysis and the positions taken.
6. Pull prior year return-to-provision (RTP) adjustments. Reconcile the prior year provision to the actual filed tax return. RTP differences adjust the current year's provision and must be identified before the current-year calculation begins. This step is frequently skipped under time pressure and creates reconciliation risk.
7. Confirm software and data feeds. If you rely on spreadsheets rather than dedicated provision software, build in additional review time. Deloitte notes that many companies underestimated the data-gathering effort required for the new ASU 2023-09 disaggregated cash taxes paid disclosure. Identify the data sources for each new disclosure requirement now, not at year-end.

Phase 2: Current Tax Provision

The current tax provision represents taxes payable (or refundable) based on the current year's taxable income and applicable tax law. Per Bloomberg Tax, the calculation follows this sequence:

1. Start with pre-tax GAAP income.
2. Add or subtract permanent differences (e.g., meals and entertainment disallowance, tax-exempt income, nondeductible penalties).
3. Add or subtract the net change in temporary differences.
4. Subtract usable net operating loss (NOL) carryforwards.
5. Multiply by the applicable tax rate (21% federal for C corporations, as established by the Tax Cuts and Jobs Act and still in effect for 2026).
6. Subtract usable tax credits and credit carryforwards.
7. Apply prior year RTP adjustments and UTP adjustments.

2026-specific wrinkle: The One Big Beautiful Bill Act (OBBBA), enacted July 4, 2025, restored 100% bonus depreciation for qualified assets acquired on or after January 20, 2025, reverted the section 163(j) interest limitation to an EBITDA-based calculation, and allows immediate expensing of domestic R&D costs under section 174. Under ASC 740, changes in tax law are recognized in financial statements in the period of enactment. If your entity is subject to CAMT or BEAT, model the secondary effects of the OBBBA's Big Three provisions on those calculations before finalizing the current provision.

Documentation checklist for this phase:

• Permanent difference schedule with supporting workpapers
• Temporary difference rollforward
• NOL and credit carryforward schedule with expiration dates
• RTP reconciliation from prior year
• CAMT computation (if applicable)
• State apportionment workpapers for each jurisdiction

Phase 3: Deferred Tax Assets and Liabilities

Deferred taxes arise from temporary differences between the book and tax basis of assets and liabilities. DTAs arise from deductible temporary differences (e.g., accrued expenses not yet deductible, NOL carryforwards); DTLs arise from taxable temporary differences (e.g., accelerated tax depreciation).

Key mechanics:

• All DTAs and DTLs are classified as noncurrent on the balance sheet, following ASU 2015-17. This is settled rule but still occasionally misapplied in older systems.
• DTAs and DTLs within the same tax jurisdiction are offset and presented net.
• Measure DTAs and DTLs using the enacted tax rate expected to apply when the temporary difference reverses. With the OBBBA now enacted, confirm that your rate assumptions reflect current law.

Common audit red flag: Failing to update the deferred tax rate for enacted law changes in the period of enactment. Auditors will test the rate used against the enacted rate as of the balance sheet date.

Phase 4: Valuation Allowance Assessment

A valuation allowance is required when it is more likely than not (greater than 50% probability) that some or all of a DTA will not be realized, per ASC 740-10-30-18.

The four sources of taxable income to evaluate:

As FASB ASC 740-10-30-18 states: "Future realization of the tax benefit of an existing deductible temporary difference or carryforward ultimately depends on whether the company has sufficient taxable income of the appropriate character within the carryback/carryforward period available under the tax law."

2026-specific wrinkle: The OBBBA's restoration of 100% bonus depreciation and immediate R&D expensing will shift the reversal patterns of existing temporary differences. Entities with valuation allowances must re-schedule reversals under the new law before concluding on the allowance amount. Do not carry forward last year's scheduling model without updating it.

Documentation auditors expect:

• Reversal scheduling model (by year, by jurisdiction)
• Three-to-five year taxable income forecast with assumptions
• Board minutes or management memo supporting any tax planning strategies
• Positive and negative evidence weighting analysis

Phase 5: Uncertain Tax Positions

ASC 740-10 requires a two-step recognition and measurement process for any tax position where the outcome is uncertain.

• Step 1 (Recognition): Recognize a tax benefit only if it is more likely than not (greater than 50% probability) that the position will be sustained upon examination by the taxing authority, based solely on the technical merits of the position.
• Step 2 (Measurement): Measure the benefit as the largest amount that is more than 50% likely to be realized upon ultimate settlement. This is the cumulative probability ("largest amount") approach, per ASC 740-10-25.

Checklist for UTP review:

1. Identify all positions taken (or expected to be taken) on tax returns that are not certain.
2. Apply the recognition threshold to each position independently.
3. For positions that pass recognition, compute the measurement amount.
4. Roll forward the unrecognized tax benefit (UTB) liability: opening balance, additions for current year positions, additions for prior year positions, reductions for settlements, reductions for lapse of statute of limitations, and closing balance.
5. Assess whether any positions have a reasonably possible change in the next 12 months (required disclosure).
6. Accrue interest and penalties on UTBs per your accounting policy (interest accrues from the date the tax would have been due).

Common mistakes: Applying the more likely than not threshold to the measurement step (it applies only to recognition); failing to identify multistate nexus positions as UTPs; not updating positions after audit developments during the year.

Phase 6: Rate Reconciliation

The effective tax rate (ETR) reconciliation explains the difference between the statutory federal rate (21% for U.S. C corporations) and the actual effective rate. This is where ASU 2023-09 makes the biggest change for 2026.

ASU 2023-09 Rate Reconciliation Requirements (Mandatory for Calendar-Year Public Companies in 2026)

Under ASU 2023-09, public business entities must present the rate reconciliation in tabular form using both dollar amounts and percentages (previously, either format was acceptable). The following categories are now mandatory:

The 5% threshold: Any reconciling item representing 5% or more of the amount computed by multiplying pretax income by the applicable statutory rate must be separately disclosed, per ASU 2023-09. This is the same threshold as SEC Regulation S-X, but it now applies to specific required categories, not just size.

Practical implication: If your GILTI inclusion, a specific state, or a valuation allowance change crosses the 5% threshold, it gets its own line. Build your reconciliation template around the mandatory categories first, then add disaggregated lines as the 5% test requires.

For a side-by-side comparison of ASU 2023-09 and IAS 12 disclosure requirements, see Finrep's ASU 2023-09 vs. IAS 12 comparison.

Phase 7: Footnote Disclosures

This is the phase most likely to generate SEC comment letters in 2026. The SEC staff is expected to scrutinize ASU 2023-09 compliance closely as the first wave of 10-Ks under the new standard hits EDGAR.

ASU 2023-09 Disclosure Checklist

Rate reconciliation (new requirements):

• Tabular format with both dollar amounts and percentages
• All nine mandatory categories included
• Items at or above the 5% threshold separately disclosed
• Qualitative description of any individually significant reconciling items

Income taxes paid (entirely new disclosure):

• Total income taxes paid (net of refunds received) disaggregated by federal, state/local, and foreign
• Individual jurisdictions separately disclosed if they represent more than 5% of total income taxes paid
• Data-gathering process in place to capture actual cash payments by jurisdiction

Other required disclosures (new or clarified):

• Pre-tax income (or loss) from continuing operations disaggregated between domestic and foreign
• Income tax expense (or benefit) from continuing operations disaggregated by federal, state, and foreign

Perennial SEC comment letter topics (still in scope):

• Valuation allowance: disclose the nature of the deferred tax assets, the evidence considered, and the conclusion reached
• Indefinite reinvestment assertion (ASC 740-30): if asserting indefinite reinvestment of foreign earnings, disclose the amount of unrecognized deferred tax liability if practicable, and ensure board resolutions and business plans support the assertion
• UTP rollforward: complete tabular rollforward with all required line items
• Reasonably possible changes in UTBs in the next 12 months
• GILTI accounting policy: disclose whether you use the period cost or deferred method

Intraperiod Tax Allocation (ASC 740-20)

This step is easy to skip and frequently flagged in audits. ASC 740-20 requires allocating total income tax expense among:

• Continuing operations
• Discontinued operations
• Other comprehensive income (OCI)
• Additional paid-in capital
• Goodwill (in business combinations)

Use the "with-and-without" approach for items recorded in OCI or equity: compute total tax expense with and without the OCI/equity item, and allocate the difference to OCI or equity. Do not allocate all tax to continuing operations by default.

Phase 8: Interim Provision (ASC 740-270)

If you prepare quarterly financial statements, the annual provision process has a quarterly analog. ASC 740-270 requires:

1. Estimate the annual effective tax rate (AETR) at the start of each quarter, based on projected full-year ordinary income and tax.
2. Apply the AETR to year-to-date ordinary income to compute the cumulative tax provision, then subtract prior quarters.
3. Identify discrete items and recognize them in the period they occur, not spread over the year. Common discrete items include:
   • Changes in enacted tax law (e.g., the OBBBA, enacted Q3 2025, was a discrete item in Q3 2025)
   • Resolution of UTPs
   • Excess tax benefits or deficiencies from stock compensation
   • Changes in valuation allowances not related to ordinary income
4. Reassess the AETR each quarter as facts change.

Common mistake: Treating a valuation allowance change driven by a change in projected full-year income as a discrete item. If it relates to ordinary income, it flows through the AETR, not as a discrete item.

Phase 9: Review, Sign-Off, and Documentation

The provision is one of the last items to close, and time pressure is the enemy of accuracy. Build these review steps into the calendar:

1. Preparer self-review: Tie every number back to a source workpaper. Confirm the deferred tax rollforward balances to the balance sheet. Confirm the current provision ties to the tax payable account.
2. Independent reviewer sign-off: A second qualified reviewer (internal or external) should independently assess the valuation allowance conclusion, the UTP recognition decisions, and the rate reconciliation categories.
3. Disclosure completeness check: Run the ASU 2023-09 checklist above against the draft footnote. Have someone who did not draft the footnote read it against the standard.
4. Audit support package: Assemble the documentation auditors will request: reversal scheduling model, valuation allowance positive/negative evidence memo, UTP technical memos, GILTI policy election documentation, CAMT computation, Pillar Two analysis, and the RTP reconciliation.
5. SEC comment letter pre-read: Before filing, read your income tax footnote through the lens of the SEC staff's historical comment letter focus areas: valuation allowance adequacy, unexplained rate reconciliation items, indefinite reinvestment assertion support, and UTP disclosures. With ASU 2023-09 now effective, expect heightened scrutiny on the new rate reconciliation format and the cash taxes paid disclosure.

Common ASC 740 Mistakes That Trigger Audit Findings

• Wrong deferred tax rate: Using a rate that does not reflect enacted law as of the balance sheet date.
• Intraperiod allocation errors: Allocating all tax to continuing operations without running the with-and-without calculation for OCI and equity items.
• Stale valuation allowance analysis: Carrying forward last year's conclusion without updating the reversal schedule for new temporary differences or law changes.
• UTP threshold confusion: Applying the more likely than not threshold to measurement (it applies only to recognition; measurement uses the largest amount approach).
• Missing the 5% threshold test: Not identifying which rate reconciliation items require separate disclosure under ASU 2023-09.
• No cash taxes paid data process: Discovering at year-end that the accounting system cannot produce income taxes paid by jurisdiction, which is now a required disclosure.
• CAMT not in scope: Treating CAMT as outside ASC 740 after FASB staff confirmed it is an income tax subject to the standard.
• Indefinite reinvestment assertion without documentation: Asserting APB 23 / ASC 740-30 treatment without current board resolutions or business plans to support it.

FAQ

What is ASC 740 in plain terms? ASC 740 is the U.S. GAAP rulebook for how companies report income taxes in their financial statements. It covers what you owe now (current tax), what you will owe or save later because of timing differences (deferred tax), and how to disclose uncertain positions and the drivers of your effective tax rate.

When does ASU 2023-09 apply to my company? For public business entities, ASU 2023-09 is effective for annual periods beginning after December 15, 2024, meaning calendar-year public companies must comply for fiscal year 2025 (disclosures in 2026 10-Ks). Private companies have a one-year deferral: effective for annual periods beginning after December 15, 2025. Early adoption is permitted.

What are the biggest ASC 740 mistakes in practice? The most audit-sensitive errors are: failing to update deferred tax rates for enacted law changes, misapplying the intraperiod allocation rules, carrying forward a stale valuation allowance analysis, and confusing the recognition and measurement thresholds for uncertain tax positions.

How do I handle Pillar Two under ASC 740? FASB has not issued a temporary exception for Pillar Two, unlike the IASB. U.S. GAAP preparers must evaluate Pillar Two top-up taxes under existing ASC 740 principles, which is highly fact-specific. Document your analysis, the positions taken, and the disclosure approach. This is an active area of practice development.

Is CAMT an income tax under ASC 740? Yes. FASB staff confirmed in a 2023 Q&A that the 15% Corporate Alternative Minimum Tax is an income tax within ASC 740's scope. Companies with average annual AFSI exceeding $1 billion must compute CAMT-related DTAs and DTLs and assess valuation allowances on them.

Where can I find the authoritative ASC 740 guidance? Start with FASB ASC Topic 740 itself. The PwC Income Taxes Guide 2026, KPMG Handbook: Income Taxes, Deloitte Roadmap: Accounting for Income Taxes, and EY Financial Reporting Developments: Income Taxes are the four most comprehensive Big-4 technical references, all updated for ASU 2023-09.

The cash taxes paid disclosure under ASU 2023-09 is the one that most companies underestimated. Build the data process before the close, not during it.