Deferred Tax Assets Explained | CPA FAR Guide With Examples
Deferred Tax Asset (DTA) Explained Guide (ASC 740)
AÂ deferred tax asset (DTA) is a balance sheet item that arises when a company pays more tax to the government than it shows as expense on its income statement. DTAs represent future tax savings from temporary differences between book income and taxable income. Under US GAAP (ASC 740), DTAs must be evaluated for realizability using a valuation allowance.
- DTAs arise when taxable income exceeds book income due to temporary differences
- Common sources: NOL carryforwards, accrued expenses, warranty reserves, bad debt allowances
- US GAAP requires a valuation allowance if realisation is not "more likely than not"
- IFRS recognises DTAs only when it is "probable" sufficient taxable profit will be available
- ASC 740 governs US GAAP; IAS 12 governs IFRS — both use the balance sheet approach
Table of Contents
- What Is a Deferred Tax Asset?
- How Are DTAs Created?
- Worked Example With Journal Entries
- Valuation Allowance Explained
- IFRS vs US GAAP Comparison
- Common Mistakes to Avoid
- Quick Glossary
- FAQ
- CPA FAR Exam Tips
What Is a Deferred Tax Asset?
A deferred tax asset represents future tax savings. It appears on the balance sheet when a company has overpaid taxes or has deductible amounts that will reduce taxes in future periods. Think of it as a tax "rain check" — you have paid more than you owe now, and you will get the benefit later.
How Are Deferred Tax Assets Created?
DTAs arise from temporary differences where taxable income is higher than book income. The most common sources include:
| Source | Why It Creates a DTA | Example |
|---|---|---|
| NOL Carryforward | Tax loss offsets future taxable income | Company loses $100K in Year 1; carries forward to Year 2 |
| Bad Debt Allowance | Book expense recognised before tax deduction allowed | $50K allowance on books; tax deduction only when written off |
| Warranty Reserve | Accrued for books but deductible only when paid | $30K warranty accrual; tax deduction when claims are settled |
| Accrued Expenses | Recognised for books before becoming tax-deductible | Bonus accrual of $20K; deductible when paid |
| Deferred Revenue | Taxable when received but deferred for books | $40K advance payment taxed immediately; recognised as revenue over time |
Worked Example: Bad Debt Allowance DTA
Year 1: Creating the DTA
| Item | Book | Tax | Difference |
|---|---|---|---|
| Revenue | $500,000 | $500,000 | — |
| Bad debt expense | ($50,000) | $0 | $50,000 |
| Other expenses | ($300,000) | ($300,000) | — |
| Pre-tax income | $150,000 | $200,000 | $50,000 |
Dr Income Tax Expense $37,500 (Book income x 25% = $150K x 25%)
Dr Deferred Tax Asset $12,500 (Temporary diff x 25% = $50K x 25%)
Cr Income Tax Payable $50,000 (Taxable income x 25% = $200K x 25%)
What happened: TechCorp paid $50,000 in tax (on $200K taxable income) but only recognised $37,500 as tax expense (on $150K book income). The $12,500 DTA represents future tax savings when the bad debt is finally written off for tax purposes.
Year 2: Reversing the DTA
In Year 2, the bad debts are written off and become tax-deductible. The temporary difference reverses:
Dr Income Tax Expense $12,500
Cr Deferred Tax Asset $12,500
The DTA is reversed as TechCorp now receives the tax benefit of the bad debt deduction.
Valuation Allowance Explained
Under ASC 740, a company must assess whether it is "more likely than not" (greater than 50% probability) that a DTA will be realised. If not, a valuation allowance must be recorded to reduce the DTA to its expected realisable value.
Dr Income Tax Expense $40,000
Cr Valuation Allowance $40,000 (contra to DTA)
Balance sheet shows: DTA $100,000 less Valuation Allowance ($40,000) = Net DTA $60,000
Positive vs Negative Evidence
| Positive Evidence (supports realisation) | Negative Evidence (requires allowance) |
|---|---|
| Strong earnings history | Cumulative losses in recent years |
| Existing contracts or backlog | History of unused carryforwards expiring |
| Appreciated asset values exceeding tax basis | Unsettled circumstances that may cause losses |
| Tax planning strategies available | Short carryforward period remaining |
IFRS vs US GAAP: Deferred Tax Assets
| Feature | US GAAP (ASC 740) | IFRS (IAS 12) |
|---|---|---|
| Approach | Balance sheet (asset-liability method) | Balance sheet approach |
| Recognition threshold | Recognise all DTAs, then apply valuation allowance | Recognise only when probable taxable profit available |
| Impairment mechanism | Valuation allowance (contra asset) | No valuation allowance; reduce DTA directly |
| Measurement | Enacted tax rates | Enacted or substantively enacted rates |
| Classification | All non-current | All non-current |
| Uncertain tax positions | Two-step: recognition then measurement (ASC 740-10) | IFRIC 23: single probability assessment |
| Discounting | Prohibited | Prohibited |
For deeper IFRS guidance on deferred taxes under IAS 12, explore our DipIFR coaching programme.
Common Mistakes to Avoid
- Confusing temporary vs permanent differences: Permanent differences (e.g., fines, municipal bond interest) never create DTAs or DTLs
- Ignoring valuation allowance reassessment: Must be reviewed every reporting period based on new evidence
- Using wrong tax rate: Use enacted rates expected to apply when differences reverse, not the current rate
- Mixing up DTA and DTL: DTA = taxable income > book income (pay more now, less later); DTL = book income > taxable income (pay less now, more later)
- Forgetting tax rate changes: When enacted rates change, existing DTAs and DTLs must be remeasured
Quick Glossary
| Term | Plain-English Definition |
|---|---|
| DTA | Deferred Tax Asset — a balance sheet item representing future tax savings |
| DTL | Deferred Tax Liability — future tax obligation from temporary differences |
| Temporary Difference | A difference between book and tax treatment that will reverse in future periods |
| Permanent Difference | A difference that will never reverse (e.g., fines, tax-exempt interest) |
| Valuation Allowance | A contra-asset reducing a DTA when realisation is not more likely than not |
| NOL | Net Operating Loss — when tax deductions exceed taxable income |
| Tax Base | The amount attributed to an asset or liability for tax purposes |
Frequently Asked Questions
What is a deferred tax asset in simple terms?
A deferred tax asset is like a tax credit on your balance sheet. It means you have paid more tax than your accounts show as an expense, so you will pay less tax in the future. It arises from timing differences between when expenses are recognised for accounting versus tax purposes.
What is the difference between a deferred tax asset and a deferred tax liability?
A DTA means you have prepaid taxes and will pay less later (taxable income > book income now). A DTL means you owe more tax later (book income > taxable income now). DTAs reduce future taxes; DTLs increase them.
What is a valuation allowance for deferred tax assets?
A valuation allowance is a contra-asset that reduces the carrying value of a DTA when it is more likely than not (over 50% probability) that some or all of the DTA will not be realised. It is required under US GAAP (ASC 740) and must be reassessed each reporting period.
How are deferred tax assets treated under IFRS?
Under IAS 12, DTAs are only recognised when it is probable that sufficient taxable profit will be available. Unlike US GAAP, IFRS does not use a valuation allowance mechanism. Instead, the DTA is simply not recognised or is reduced directly if the probability threshold is not met.
Can deferred tax assets expire?
DTAs related to NOL carryforwards may have expiration dates depending on the jurisdiction. In the US, federal NOLs generated after 2017 can be carried forward indefinitely but are limited to 80% of taxable income. State NOL rules vary. DTAs from other temporary differences do not expire but reverse when the underlying transaction settles.
Where does a deferred tax asset appear on the balance sheet?
Under both US GAAP and IFRS, all deferred tax assets are classified as non-current assets on the balance sheet, regardless of when the underlying temporary difference is expected to reverse.
CPA FAR Exam: How Deferred Tax Assets Are Tested
| Exam Focus Area | What to Know |
|---|---|
| DTA calculation | Calculate DTAs from temporary differences using enacted tax rates |
| Valuation allowance | When to record, reverse, and the "more likely than not" threshold |
| Journal entries | Record income tax expense, DTA, DTL, and valuation allowance entries |
| Temp vs perm differences | Identify which items create deferred taxes and which do not |
| Tax rate changes | Remeasure existing DTAs/DTLs when enacted rates change |
| NOL carryforwards | Calculate DTA from NOLs and apply the 80% limitation post-2017 |
Also see our related CPA FAR guides on LIFO vs FIFO, Revenue Recognition (ASC 606), and Statement of Stockholders' Equity.
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Vicky Sarin is the founder of Eduyush, a professional certification coaching platform. With years of experience in accounting education, Vicky helps CPA, ACCA, and DipIFR candidates master complex topics through clear, exam-focused content. Connect with Eduyush for CPA review courses and DipIFR coaching.
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