How To Calculate Deferred Tax

Introduction & Importance of Deferred Tax Calculations

Understanding the critical role of deferred tax in financial reporting and tax planning

Deferred tax represents one of the most complex yet crucial elements in financial accounting, bridging the gap between accounting profit and taxable profit. This concept emerges from temporary differences between the carrying amounts of assets and liabilities in financial statements and their corresponding tax bases.

The importance of accurate deferred tax calculations cannot be overstated:

1. Financial Statement Accuracy: Proper deferred tax accounting ensures financial statements reflect true economic reality, preventing material misstatements that could mislead investors and regulators.
2. Tax Planning Optimization: Understanding deferred tax positions allows companies to strategically time income recognition and expense deductions, potentially reducing overall tax burdens.
3. Regulatory Compliance: Both GAAP (ASC 740) and IFRS (IAS 12) mandate specific deferred tax accounting treatments, with non-compliance risking penalties and reputational damage.
4. Investor Confidence: Transparent deferred tax reporting demonstrates financial sophistication, enhancing credibility with shareholders and analysts.
5. M&A Valuation: Deferred tax assets/liabilities significantly impact company valuations during mergers and acquisitions, often representing 5-15% of deal values.

According to a 2023 PwC study, 68% of Fortune 500 companies reported material deferred tax assets, with technology and pharmaceutical sectors showing the highest concentrations due to significant R&D expenditures and intangible assets. The SEC consistently flags deferred tax accounting as a high-risk area in financial statement reviews, emphasizing its critical nature in corporate reporting.

How to Use This Deferred Tax Calculator

Step-by-step guide to accurate deferred tax computation

Our interactive calculator simplifies complex deferred tax calculations through this structured process:

1. Input Accounting Profit:
   • Enter your company’s accounting profit before tax (also called pre-tax book income)
   • This represents the profit shown in your income statement before income tax expense
   • Example: If your income statement shows $1,000,000 profit before tax, enter 1000000
2. Specify Taxable Profit:
   • Input the taxable profit as calculated for your tax return
   • This differs from accounting profit due to permanent and temporary differences
   • Example: If your tax return shows $850,000 taxable income, enter 850000
3. Set Corporate Tax Rate:
   • Enter your applicable corporate tax rate as a percentage
   • U.S. federal rate is currently 21% (enter as “21”), but include state rates if calculating combined tax
   • For international companies, use your jurisdiction’s corporate tax rate
4. Identify Temporary Differences:
   • Select whether you’re analyzing taxable or deductible temporary differences
   • Taxable temporary differences create deferred tax liabilities (future tax payments)
   • Deductible temporary differences create deferred tax assets (future tax savings)
5. Quantify the Difference:
   • Enter the monetary amount of the temporary difference
   • Example: If depreciation for tax purposes exceeds book depreciation by $150,000, enter 150000
   • For multiple differences, calculate the net amount before entering
6. Review Results:
   • The calculator instantly displays:
     • Deferred tax asset/liability amount
     • Effective tax rate percentage
     • Current tax expense
     • Total tax expense (current + deferred)
   • Visual chart shows the relationship between components
   • All results update dynamically as you adjust inputs

Pro Tip: For complex scenarios with multiple temporary differences, calculate each separately and sum the results. The IRS provides detailed guidance on temporary differences in Publication 535 (Business Expenses).

Formula & Methodology Behind Deferred Tax Calculations

Understanding the mathematical foundation and accounting principles

The deferred tax calculation process follows this structured methodology:

1. Core Formula

The fundamental deferred tax calculation uses this formula:

Deferred Tax = Temporary Difference × Tax Rate

Where:
- Temporary Difference = Accounting Value - Tax Base
- Tax Rate = Applicable corporate tax rate (expressed as decimal)

2. Temporary Differences Classification

Difference Type	Accounting Treatment	Deferred Tax Impact	Common Examples
Taxable Temporary Differences	Create Deferred Tax Liabilities	Future tax payments	Accelerated tax depreciation vs. straight-line book depreciation Revenue recognized for tax before book Gains on installment sales
Deductible Temporary Differences	Create Deferred Tax Assets	Future tax savings	Warranty expenses accrued for book before paid Bad debt expenses recognized for book before tax Prepaid expenses deducted for tax before book

3. Calculation Process Flow

1. Identify Temporary Differences:

   Compare the carrying amount of each asset/liability with its tax base to determine temporary differences.

2. Classify Differences:

   Categorize each difference as either taxable or deductible based on future tax consequences.

3. Apply Tax Rate:

   Multiply each temporary difference by the enacted tax rate expected to apply when the difference reverses.

4. Net Deferred Tax Assets/Liabilities:

   Combine all deferred tax assets and liabilities, considering valuation allowances for uncertain tax positions.

5. Present in Financial Statements:

   Report net deferred tax assets/liabilities in the balance sheet and disclose components in tax footnotes.

4. Advanced Considerations

• Valuation Allowance:

  Deferred tax assets require valuation allowances if it’s “more likely than not” that some portion won’t be realized (ASC 740-10-30).

• Change in Tax Rates:

  Deferred tax accounts must be adjusted when tax rates change, with the effect recognized in income tax expense.

• Uncertain Tax Positions:

  FIN 48 (now part of ASC 740) requires recognition of tax benefits only when more likely than not to be sustained upon examination.

• Foreign Operations:

  Deferred taxes for foreign subsidiaries consider both local tax rates and potential repatriation taxes.

The FASB provides comprehensive guidance in ASC 740, while the IASB’s IAS 12 governs international reporting. Both standards emphasize the “balance sheet approach” to deferred tax accounting.

Real-World Examples of Deferred Tax Calculations

Practical case studies demonstrating deferred tax applications

Case Study 1: Technology Company with R&D Credits

Scenario: TechCo Inc. has $5,000,000 accounting profit before tax. For tax purposes, they claimed $1,200,000 in R&D credits that aren’t recognized for book purposes. The corporate tax rate is 21%.

Calculation:

• Temporary Difference: $1,200,000 (deductible)
• Deferred Tax Asset: $1,200,000 × 21% = $252,000
• Current Tax Expense: ($5,000,000 – $1,200,000) × 21% = $823,200
• Total Tax Expense: $823,200 – $252,000 = $571,200
• Effective Tax Rate: $571,200 / $5,000,000 = 11.42%

Insight: The R&D credits created a significant deferred tax asset, reducing TechCo’s effective tax rate from 21% to 11.42%, demonstrating how tax planning can substantially impact reported earnings.

Case Study 2: Manufacturing Company with Accelerated Depreciation

Scenario: ManuFab Corp. shows $3,500,000 accounting profit. For tax purposes, they used accelerated depreciation resulting in $800,000 higher tax depreciation than book depreciation. Tax rate is 25% (including state taxes).

Calculation:

• Temporary Difference: $800,000 (taxable)
• Deferred Tax Liability: $800,000 × 25% = $200,000
• Current Tax Expense: ($3,500,000 – $800,000) × 25% = $675,000
• Total Tax Expense: $675,000 + $200,000 = $875,000
• Effective Tax Rate: $875,000 / $3,500,000 = 25%

Insight: While the deferred tax liability increases current taxable income, the effective rate remains at 25% because the temporary difference will reverse in future years when book depreciation catches up.

Case Study 3: Retail Company with Inventory Valuation Differences

Scenario: RetailMax uses FIFO for books ($10,000,000 profit) but LIFO for taxes, creating $1,500,000 higher taxable income. They also have $300,000 of non-deductible executive compensation. Tax rate is 21%.

Calculation:

• Temporary Difference (Inventory): $1,500,000 (taxable)
• Permanent Difference (Compensation): $300,000 (add-back)
• Deferred Tax Liability: $1,500,000 × 21% = $315,000
• Current Tax Expense: ($10,000,000 + $1,500,000 + $300,000) × 21% = $2,415,000
• Total Tax Expense: $2,415,000 + $315,000 = $2,730,000
• Effective Tax Rate: $2,730,000 / $10,000,000 = 27.3%

Insight: The combination of temporary and permanent differences resulted in an effective tax rate (27.3%) higher than the statutory rate (21%), demonstrating how accounting choices impact reported tax expenses.

Deferred Tax Data & Statistics

Empirical insights into deferred tax practices across industries

The following tables present comprehensive data on deferred tax assets and liabilities across different sectors and company sizes:

Deferred Tax Assets by Industry (2023 Data – $ in millions)

Industry	Median Deferred Tax Assets	% of Total Assets	Primary Drivers	Valuation Allowance %
Technology	$485	8.2%	R&D credits, stock compensation	12%
Pharmaceutical	$720	11.5%	R&D, patent amortization	8%
Manufacturing	$210	4.8%	Depreciation, warranty reserves	18%
Financial Services	$1,250	15.3%	Loan loss reserves, bad debt	22%
Retail	$180	3.9%	Inventory methods, lease accounting	25%
Energy	$340	6.7%	Asset retirement obligations	15%

Deferred Tax Liabilities by Company Size (2023 Data)

Company Size (Revenue)	Median Deferred Tax Liabilities	% of Total Liabilities	Primary Drivers	Average Reversal Period (years)
<$50M	$45,000	3.1%	Accelerated depreciation, revenue recognition	3.2
$50M-$250M	$280,000	4.5%	Depreciation, compensation timing	4.1
$250M-$1B	$1.2M	5.8%	Intangible assets, pension costs	5.3
$1B-$5B	$6.8M	7.2%	M&A related, stock options	6.7
$5B+	$45.3M	8.9%	Global operations, complex transactions	8.2

Key observations from the data:

• Financial services companies maintain the highest deferred tax assets (15.3% of total assets) due to significant loan loss reserves and credit-related temporary differences.
• Smaller companies (<$50M revenue) have the shortest deferred tax liability reversal periods (3.2 years), reflecting simpler tax structures and shorter asset lives.
• Valuation allowances are highest in retail (25%) and financial services (22%), indicating greater uncertainty about realizing deferred tax assets in these sectors.
• Technology and pharmaceutical companies show the lowest valuation allowance percentages (12% and 8% respectively), suggesting higher confidence in future profitability.
• Deferred tax liabilities as a percentage of total liabilities increase with company size, reaching 8.9% for companies with revenue over $5 billion.

According to a 2023 Deloitte analysis, companies with sophisticated tax planning strategies typically maintain deferred tax assets equal to 5-15% of total assets, while those with less optimized approaches often show deferred tax liabilities representing 3-8% of total liabilities. The IRS Statistics of Income reports that deferred tax accounting represents one of the top three adjustment areas in corporate audits.

Expert Tips for Deferred Tax Optimization

Professional strategies to enhance deferred tax management

1. Conduct Regular Temporary Difference Analyses:
   • Implement quarterly reviews of all balance sheet accounts to identify new temporary differences
   • Use specialized tax provision software to track differences systematically
   • Document the business purpose and expected reversal timing for each difference
2. Optimize Tax Attribute Utilization:
   • Strategically time the recognition of income and expenses to maximize NOL carryforwards
   • Coordinate state and federal tax planning to optimize attribute usage
   • Consider tax attribute studies to identify underutilized credits and deductions
3. Enhance Valuation Allowance Documentation:
   • Develop comprehensive “more likely than not” analyses for deferred tax assets
   • Create 3-5 year taxable income projections to support realizability
   • Document tax planning strategies that could generate sufficient future taxable income
4. Implement Robust ASC 740 Processes:
   • Establish clear roles and responsibilities for tax accounting vs. compliance teams
   • Develop standardized templates for tax account rollforwards and reconciliations
   • Implement dual-control procedures for material tax account adjustments
5. Leverage Technology Solutions:
   • Adopt tax provision software with built-in ASC 740 calculations and reporting
   • Integrate tax systems with ERP and consolidation platforms to reduce manual errors
   • Use data analytics to identify anomalies and potential risks in tax accounts
6. Proactively Manage Uncertain Tax Positions:
   • Maintain contemporaneous documentation for all tax positions
   • Conduct regular UTP (Uncertain Tax Position) assessments and updates
   • Develop consistent methodologies for measuring and recognizing tax benefits
7. Coordinate International Tax Planning:
   • Analyze deferred taxes in the context of global effective tax rate management
   • Consider the impact of foreign tax credits on deferred tax calculations
   • Evaluate transfer pricing policies’ effects on temporary differences
8. Enhance Disclosure Transparency:
   • Provide clear breakdowns of significant deferred tax assets and liabilities
   • Disclose the nature and expected timing of temporary difference reversals
   • Explain changes in valuation allowances and their impact on financial results
9. Invest in Continuous Education:
   • Stay current with FASB and IASB pronouncements affecting tax accounting
   • Attend specialized training on complex areas like business combinations and share-based payments
   • Develop cross-functional understanding between tax, accounting, and finance teams
10. Benchmark Against Peers:
    • Analyze competitors’ deferred tax footnotes to identify industry best practices
    • Compare effective tax rates and deferred tax balances with industry averages
    • Monitor SEC comment letters for emerging deferred tax reporting issues

Implementing these strategies can significantly improve deferred tax management. A 2022 EY study found that companies with formal tax accounting governance processes reduced their deferred tax provision errors by 40% and achieved 15% lower effective tax rates compared to peers with ad-hoc approaches.

Interactive FAQ: Deferred Tax Calculations

Expert answers to common deferred tax questions

What’s the fundamental difference between current and deferred tax?

Current tax represents the actual tax payable or refundable for the current period based on taxable income, while deferred tax accounts for temporary differences between accounting and tax treatments that will reverse in future periods.

Key distinctions:

• Timing: Current tax relates to the present period; deferred tax relates to future periods
• Calculation Basis: Current tax uses taxable income; deferred tax uses temporary differences
• Financial Statement Presentation: Current tax appears in the income statement; deferred tax appears in both the income statement (expense) and balance sheet (asset/liability)
• Cash Flow Impact: Current tax affects current period cash flows; deferred tax doesn’t impact cash until reversal

Think of current tax as what you pay now, and deferred tax as what you’ll either pay later (liability) or save later (asset).

How do permanent differences affect deferred tax calculations?

Permanent differences don’t directly affect deferred tax calculations because they represent items that are either:

• Recognized for tax but never for book purposes (e.g., tax-exempt income)
• Recognized for book but never for tax purposes (e.g., certain fines and penalties)

Key impacts:

• Permanent differences create a disparity between the statutory tax rate and effective tax rate
• They affect current tax calculations but not deferred tax (since they never reverse)
• Common examples include:
  • Non-deductible meals and entertainment
  • Life insurance proceeds
  • Municipal bond interest (tax-exempt)
  • Non-deductible portion of business meals

Example: If a company has $100,000 of non-deductible fines, this permanently increases taxable income by $100,000 but doesn’t create any deferred tax because it will never reverse.

What are the most common temporary differences that create deferred taxes?

Temporary differences arise when the tax base of an asset or liability differs from its carrying amount in the financial statements. The most frequent sources include:

Taxable Temporary Differences (create deferred tax liabilities):

• Depreciation Methods: Accelerated tax depreciation vs. straight-line book depreciation
• Revenue Recognition: Income recognized for tax before book (e.g., installment sales)
• Inventory Valuation: LIFO for tax vs. FIFO for book
• Prepaid Expenses: Deducted for tax when paid but amortized for book
• Gains on Sales: Taxable gains deferred for book purposes (e.g., like-kind exchanges)

Deductible Temporary Differences (create deferred tax assets):

• Warranty Expenses: Accrued for book when products sold but deducted for tax when paid
• Bad Debt Expenses: Reserved for book but deducted for tax when actually written off
• R&D Costs: Capitalized for book but expensed for tax (or vice versa depending on jurisdiction)
• Pension Costs: Different recognition timing between book and tax
• Loss Carryforwards: Tax losses not yet utilized but available to offset future taxable income

Industry-Specific Examples:

• Financial Services: Loan loss reserves, credit card fee recognition
• Technology: Stock-based compensation, R&D credits
• Manufacturing: Warranty reserves, environmental remediation liabilities
• Retail: Gift card breakage, loyalty program liabilities

How does a change in tax rates affect existing deferred tax balances?

When tax rates change, companies must remeasure their existing deferred tax assets and liabilities using the new enacted tax rates. This adjustment directly impacts income tax expense in the period of the rate change.

Accounting Treatment (ASC 740-10-40):

• The effect of a change in tax rates is recognized in income tax expense from continuing operations
• Deferred tax accounts are adjusted prospectively – no restatement of prior periods
• The adjustment is calculated as the difference between the carrying amount using old rates vs. new rates

Example Calculation:

A company has $1,000,000 of taxable temporary differences when the tax rate changes from 25% to 21%.

• Original deferred tax liability: $1,000,000 × 25% = $250,000
• Adjusted deferred tax liability: $1,000,000 × 21% = $210,000
• Reduction in deferred tax liability: $40,000
• This $40,000 reduction increases income tax expense in the period of the rate change

Special Considerations:

• For deferred tax assets, a rate decrease would reduce the asset value and increase tax expense
• Companies must consider both federal and state rate changes
• The adjustment may significantly impact quarterly earnings, especially for companies with large deferred tax balances
• Disclosure requirements include explaining the nature and amount of rate change effects

The 2017 U.S. tax reform (TCJA) provided a dramatic example, with many companies recording one-time adjustments. For instance, Citigroup reported a $22 billion charge due to deferred tax asset revaluation when the corporate rate dropped from 35% to 21%.

What are the key disclosure requirements for deferred taxes in financial statements?

Both U.S. GAAP (ASC 740) and IFRS (IAS 12) mandate comprehensive deferred tax disclosures to provide financial statement users with transparent information about a company’s tax position. Key requirements include:

Balance Sheet Disclosures:

• Separate line items for:
  • Current tax assets/liabilities
  • Deferred tax assets/liabilities (net by jurisdiction if material)
• Classification as current/non-current based on the related asset/liability

Income Statement Disclosures:

• Components of tax expense including:
  • Current tax expense
  • Deferred tax expense
  • Adjustments for prior periods
• Reconciliation of effective tax rate to statutory rate

Footnote Disclosures:

• Major components of deferred tax assets and liabilities
• Breakdown by temporary difference type (e.g., depreciation, warranties)
• Movement analysis (rollforward) showing:
  • Opening balances
  • Additions/charges during the period
  • Utilizations/reversals
  • Closing balances
• Unrecognized deferred tax assets and reasons for non-recognition
• Valuation allowances and changes therein
• Uncertain tax positions and related interest/penalties
• Tax loss and credit carryforwards with expiration dates

Additional Requirements:

• Disclosure of tax rate changes and their effects
• Information about tax holidays or special tax regimes
• Country-by-country reporting for multinational enterprises (under certain thresholds)
• Disclosure of significant tax settlements or examinations

Example Disclosure Format:

Deferred Tax Assets and Liabilities:
-----------------------------------
                                2023       2022
Deferred tax assets:
  Accrued expenses          $ 12,500   $ 10,800
  Warranty reserves           8,200      7,500
  Net operating losses       25,300     30,100
  Other                       4,000      3,600
                              ------     ------
  Total deferred tax assets  50,000     52,000
  Valuation allowance        (10,000)   (12,000)
                              ------     ------
  Net deferred tax assets    40,000     40,000

Deferred tax liabilities:
  Property and equipment     (18,500)   (16,200)
  Intangible assets         (12,000)   (14,500)
  Other                      (3,500)    (2,800)
                              ------     ------
  Total deferred tax liabilities (34,000)   (33,500)
                              ------     ------
  Net deferred tax asset   $  6,000   $  6,500
                    

The SEC’s Final Rule on Income Tax Disclosures (adopted December 2021) enhanced requirements, particularly for domestic and foreign pre-tax income breakdowns and tax rate reconciliation categories.

How do deferred taxes impact mergers and acquisitions?

Deferred taxes play a crucial role in M&A transactions, often significantly affecting deal valuation, structuring decisions, and post-acquisition integration. Key considerations include:

1. Purchase Price Allocation:

• Deferred tax assets/liabilities are identified and valued as part of purchase price allocation
• Temporary differences in acquired assets/liabilities create deferred taxes that affect goodwill calculation
• Example: If acquired property has a tax basis lower than fair value, this creates a taxable temporary difference

2. Deal Structuring:

• Asset vs. Stock Deals:
  • Asset purchases allow step-up in tax basis, potentially reducing future deferred tax liabilities
  • Stock purchases preserve target’s tax attributes, including deferred tax positions
• Tax Attribute Preservation:
  • NOL carryforwards and other deferred tax assets may be limited under IRC Section 382 after ownership changes
  • Due diligence must assess utilizability of target’s tax attributes

3. Valuation Impacts:

• Deferred tax liabilities reduce enterprise value (cash tax savings already reflected in target’s financials)
• Deferred tax assets increase value if likely to be realized (subject to valuation allowance analysis)
• Typical deferred tax items in M&A:
  • Unrealized gains/losses on investments
  • Undistributed earnings of foreign subsidiaries
  • LIFO reserves for inventory
  • Post-retirement benefit obligations

4. Post-Acquisition Integration:

• Combined tax provision processes must be established
• Deferred tax accounts require integration into consolidated financial statements
• Tax attribute tracking systems need updates for new entities

5. Financial Statement Effects:

• Acquisition accounting creates new temporary differences:
  • Fair value adjustments to assets/liabilities
  • Goodwill and other intangibles not deductible for tax
• Deferred taxes on these differences affect post-acquisition earnings

Example Calculation:

Acquirer purchases Target Co with:

• Book basis of PP&E: $10M (tax basis: $6M due to accelerated depreciation)
• Fair value of PP&E: $12M
• Tax rate: 21%

Post-acquisition deferred tax calculation:

• Existing temporary difference: $10M – $6M = $4M (creates $840K deferred tax liability)
• Step-up difference: $12M – $10M = $2M (tax-deductible goodwill not created, so $2M taxable temporary difference)
• Additional deferred tax liability: $2M × 21% = $420K
• Total deferred tax liability: $1,260K

A PwC study found that deferred tax items represent 8-12% of purchase price allocations in typical M&A transactions, with technology deals often exceeding 15% due to significant intangible assets and R&D-related temporary differences.

What are the most common mistakes companies make in deferred tax accounting?

Deferred tax accounting presents complex challenges, and even sophisticated companies frequently make these avoidable errors:

1. Incomplete Temporary Difference Identification:
   • Failing to analyze all balance sheet accounts for potential temporary differences
   • Overlooking items like:
     • Prepaid expenses and accrued liabilities
     • Derivative financial instruments
     • Lease accounting differences
     • Foreign currency translation adjustments
   • Not considering the tax consequences of intercompany transactions
2. Improper Valuation Allowance Assessments:
   • Applying “more likely than not” threshold inconsistently
   • Failing to document supporting evidence for realizability
   • Not considering all sources of future taxable income (including tax planning strategies)
   • Inadequate analysis of positive and negative evidence
3. Incorrect Tax Rate Application:
   • Using incorrect enacted tax rates (e.g., not considering scheduled rate changes)
   • Applying wrong rates for foreign operations or state taxes
   • Failing to update deferred taxes when tax laws change
4. Poor Documentation of Uncertain Tax Positions:
   • Inadequate support for tax positions taken in financial statements
   • Failing to update UTP analyses when circumstances change
   • Not properly measuring and recognizing interest/penalties
5. Improper Classification of Differences:
   • Misclassifying permanent differences as temporary (or vice versa)
   • Incorrectly netting taxable and deductible temporary differences
   • Failing to separate current and non-current deferred tax amounts
6. Inadequate Disclosures:
   • Missing required components of deferred tax footnotes
   • Failing to disclose significant temporary differences
   • Not providing sufficient information about valuation allowances
   • Omitting rate reconciliation details
7. Ignoring Interim Period Requirements:
   • Not properly estimating annual effective tax rate for interim periods
   • Failing to adjust for discrete items in quarterly provisions
   • Incorrectly handling year-to-date calculations
8. Overlooking Business Combinations:
   • Not properly accounting for deferred taxes in purchase price allocations
   • Failing to consider IRC Section 382 limitations on NOLs
   • Incorrectly handling deferred taxes on goodwill
9. Lack of Proper Controls:
   • Inadequate review procedures for tax account calculations
   • Missing segregation of duties between tax preparation and review
   • Failing to implement proper change management for tax law updates
10. International Complexities:
    • Not properly accounting for deferred taxes on undistributed foreign earnings
    • Failing to consider foreign tax credit limitations
    • Incorrectly handling deferred taxes in hyperinflationary economies

Consequences of Errors:

• Material misstatements requiring financial restatements
• SEC comment letters and potential enforcement actions
• Increased audit fees and professional costs
• Damage to investor confidence and reputation
• Potential tax authority adjustments and penalties

Prevention Strategies:

• Implement robust tax account governance frameworks
• Develop comprehensive checklists for temporary difference identification
• Conduct regular training on ASC 740/IFRS 12 requirements
• Utilize specialized tax provision software with built-in controls
• Engage external advisors for complex transactions and rate changes
• Perform periodic internal reviews of tax accounting processes

According to Audit Analytics, deferred tax accounting errors represented 18% of all financial restatements in 2022, with the most common issues involving valuation allowances (32% of cases) and temporary difference misclassifications (28%).