ASC 740, Income Taxes, governs how an entity reports the effects of income taxes in its financial statements under US GAAP. For a private C corporation, it drives two of the most judgment-heavy numbers on the balance sheet: deferred tax assets and liabilities, and the liability for unrecognized tax benefits. For pass-through entities, it still matters, because the tax status itself is a tax position and some state and local taxes are levied at the entity level.
This guide covers the core mechanics, the valuation allowance, uncertain tax positions under ASC 740-10, the disclosure changes from ASU 2023-09 as they apply to entities other than public business entities (PBEs), and what auditors test. It paraphrases the Codification; read ASC 740 and the ASU text before relying on any point.
The objective of ASC 740
ASC 740 has two stated objectives: recognize the taxes payable or refundable for the current year, and recognize deferred tax liabilities and assets for the future tax consequences of events already recognized in the financial statements or tax returns. Total income tax expense is the sum of the two:
- Current tax expense or benefit: the amount of income taxes payable or refundable for the current year, as determined by applying the tax law to taxable income.
- Deferred tax expense or benefit: the change during the year in the entity's deferred tax liabilities and assets, excluding amounts recorded through equity, business combinations or other comprehensive income.
The approach is a balance sheet approach. You do not compute deferred tax expense directly; you compute the deferred tax balances at the start and end of the year, and the change, after allocation, is the expense.
Current tax
Current tax starts with pretax book income and adjusts for permanent and temporary differences to arrive at taxable income. Common adjustments for a private company include:
- meals and entertainment limitations and fines and penalties (permanent)
- depreciation differences from bonus depreciation and Section 179 (temporary)
- accrued expenses deductible only when paid, such as certain bonuses and vacation (temporary)
- allowance for credit losses and inventory reserves (temporary)
- capitalized research and experimental expenditures under the tax law in effect for the year (temporary)
The current provision is an estimate made before the return is filed. The difference between the provision and the filed return, the return-to-provision true-up, is recorded in the period the return is filed. A recurring, large true-up is a signal that the provision process needs work.
Deferred tax
Temporary differences
A temporary difference is a difference between the tax basis of an asset or liability and its reported amount in the financial statements that will result in taxable or deductible amounts in future years when the reported amount is recovered or settled. Deferred taxes are measured using the enacted tax rate expected to apply to taxable income in the periods in which the difference is expected to reverse. Rates that are proposed but not enacted are not used.
Two consequences follow. First, the effect of a change in tax law or rates is recognized in income from continuing operations in the period that includes the enactment date. Second, state deferred taxes need their own rate analysis, including apportionment where the company files in several states.
Balance sheet classification
All deferred tax assets and liabilities are classified as noncurrent on a classified balance sheet. Within a tax-paying component and jurisdiction, deferred tax assets and liabilities are offset and presented as a single noncurrent amount. Balances from different jurisdictions are not offset.
Tax rate reconciliation in practice
Even though entities other than PBEs are not required to present a numerical rate reconciliation, preparing one internally is the fastest way to find errors. If the effective rate does not make sense after permanent items, state taxes and credits, something in the deferred rollforward is usually wrong.
The valuation allowance
Deferred tax assets are reduced by a valuation allowance if, based on the weight of available evidence, it is more likely than not (a likelihood of more than 50 percent) that some portion or all of the deferred tax asset will not be realized.
Sources of taxable income
Realization depends on sufficient taxable income of the appropriate character within the carryback or carryforward period. ASC 740 identifies four possible sources:
- future reversals of existing taxable temporary differences
- future taxable income exclusive of reversing temporary differences and carryforwards
- taxable income in prior carryback years, if carryback is permitted under the tax law
- tax-planning strategies that would, if necessary, be implemented to realize the asset
The order matters in practice. Reversing taxable temporary differences are the most objective source. Projections of future income are the most subjective, and they carry less weight when there is negative evidence.
Weighing positive and negative evidence
Evidence is weighted in proportion to how objectively it can be verified. The Codification lists cumulative losses in recent years as a significant piece of negative evidence that is difficult to overcome. Many practitioners use a three-year cumulative pretax result as a starting point for that analysis; that is common practice rather than a bright line in the standard. Other negative evidence includes a history of carryforwards expiring unused and losses expected in early future years. Positive evidence includes existing contracts or backlog that will produce enough taxable income, and appreciated assets.
Valuation allowance memos are a frequent peer review and inspection comment area. A good memo names each source of taxable income, schedules reversals by year where expiration matters, and concludes on each jurisdiction separately.
Uncertain tax positions (ASC 740-10)
ASC 740-10 sets a two-step approach for every tax position taken or expected to be taken in a tax return.
- Recognition. The entity recognizes the benefit of a position only if it is more likely than not that the position will be sustained on examination, based on its technical merits. The evaluation assumes the taxing authority will examine the position with full knowledge of all relevant information.
- Measurement. A position that meets the recognition threshold is measured at the largest amount of benefit that is greater than 50 percent likely to be realized on ultimate settlement.
The difference between the benefit claimed on the return and the benefit recognized is an unrecognized tax benefit, usually presented as a liability or as a reduction of a deferred tax asset for a related carryforward. Interest and penalties on unrecognized benefits are accrued if the tax law requires them, and the entity makes and discloses a policy election on whether to classify them as income tax expense or another expense.
Positions that matter for private companies
The uncertain tax position guidance applies to all entities, including pass-through and not-for-profit entities. Areas worth a look:
- Tax status. An S corporation election or a partnership classification is itself a position. A defect in an S election, such as an ineligible shareholder, can change the entity's status.
- State nexus. Filing in too few states is a common exposure for growing companies with remote employees or sales into new states.
- Credits and deductions with technical uncertainty, such as research credits, transfer pricing between related entities, and the capitalization of costs.
- Entity-level state taxes paid by pass-through entities, including elective pass-through entity taxes, which need an analysis of whether they are income taxes in the scope of ASC 740.
ASU 2023-09 disclosure changes for entities other than PBEs
ASU 2023-09, Improvements to Income Tax Disclosures, is effective for entities other than PBEs for annual periods beginning after December 15, 2025, with early adoption permitted. For a calendar-year private company, that means 2026 annual financial statements. Its main effects for those entities are:
- Rate reconciliation. Entities other than PBEs continue to disclose qualitatively the nature and effect of significant reconciling items, now organized by specified categories and individual jurisdictions (categories such as state and local taxes, foreign tax effects, changes in tax laws, nontaxable or nondeductible items, credits and changes in valuation allowances). A tabular numerical reconciliation is still not required for them.
- Income taxes paid. All entities disclose income taxes paid, net of refunds, disaggregated by federal, state and foreign taxes, and further by individual jurisdictions where the amount paid meets a quantitative threshold set in the ASU (equal to or greater than 5 percent of total income taxes paid).
- Pretax income and expense. Disclosure of income or loss from continuing operations before income tax, disaggregated between domestic and foreign, and of income tax expense from continuing operations, disaggregated by federal, state and foreign.
- Removed requirements. The ASU removed certain existing disclosures, including the requirement to disclose the nature and estimate of the range of reasonably possible changes in unrecognized tax benefits within 12 months.
Check the transition method: the ASU is applied prospectively, with retrospective application permitted.
What auditors test in the tax provision
The tax accounts are covered by AU-C 540 (accounting estimates), and many firms bring in a tax professional, which is an auditor's specialist under AU-C 620 if that person's expertise is in a field other than accounting or auditing. Typical procedures:
- Tie the provision to the books. Agree pretax income, permanent and temporary differences to the trial balance and supporting schedules. Agree the prior-year deferred balances to last year's audited file and the filed return.
- Test the deferred rollforward. Recompute each deferred item from book and tax basis, check rates against enacted law, and confirm the rollforward reconciles to the balance sheet and to deferred expense.
- Review the return-to-provision true-up. Investigate significant differences between last year's provision and the filed return; a pattern can indicate a misstatement in the current year.
- Evaluate the valuation allowance. Challenge projections against history and budgets used elsewhere in the audit, such as in going concern or impairment testing. Inconsistent forecasts across areas are a classic finding. See going concern assessment.
- Assess uncertain tax positions. Read correspondence with taxing authorities, examination reports and statute of limitation status. Inquire about state filing footprint and new jurisdictions.
- Check cash taxes. Agree payments and refunds to bank activity and tax notices; under ASU 2023-09 this now feeds a disclosure.
- Read the disclosures against ASC 740-10-50 as amended, using a GAAP disclosure checklist.
- Obtain representations in the management representation letter about tax positions and the completeness of information provided (AU-C 580).
Independence when the firm prepares the provision
Preparing a client's tax provision is a nonattest service. The AICPA independence rules permit it for an attest client only if the general requirements for nonattest services are met, including management taking responsibility for the provision and designating an individual with suitable skill, knowledge or experience to oversee it. Document that assessment and consider the self-review threat.
Common errors
- Using the statutory federal rate for state deferred items, or ignoring apportionment changes.
- Deferred balances that do not reconcile to book and tax basis because the rollforward has not been refreshed in years.
- Valuation allowance conclusions that rely on projections inconsistent with the client's own budget.
- Pass-through entities with no documented consideration of tax status or entity-level state taxes.
- Missing disclosure of the interest and penalties classification policy.
Misstatements found in this area go to the summary of misstatements under AU-C 450; the uncorrected misstatements evaluator helps assess them against materiality.
Frequently asked questions
Do private companies have to present a tax rate reconciliation?
No numerical reconciliation is required for entities other than PBEs. They disclose the nature and effect of significant reconciling items qualitatively. Under ASU 2023-09, that qualitative disclosure is organized by specified categories of reconciling items.
When is ASU 2023-09 effective for private companies?
For entities other than PBEs, it is effective for annual periods beginning after December 15, 2025, so calendar-year 2026 financial statements. Early adoption is permitted.
What does more likely than not mean in ASC 740?
It means a likelihood of more than 50 percent. It is the threshold for both recording a valuation allowance on deferred tax assets and recognizing the benefit of an uncertain tax position.
Does ASC 740 apply to S corporations and partnerships?
Yes, in part. Pass-through entities usually record no federal income tax, but their tax status is a tax position subject to ASC 740-10, and any entity-level state or local income taxes are accounted for under ASC 740.
Are deferred taxes current or noncurrent?
Noncurrent. All deferred tax assets and liabilities are classified as noncurrent on a classified balance sheet, offset within each tax-paying component and jurisdiction.
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