1. The Core Recognition Challenge
While DTLs are recognized for almost all taxable temporary differences, DTAs carry a significant valuation risk: a future tax deduction is only valuable if the company generates enough taxable income in the future to offset it. If a company goes bankrupt or faces ongoing losses, its DTAs become worthless.
2. The US GAAP Approach: Valuation Allowances (ASC 740)
US GAAP requires a two-step approach for DTAs. First, the entity recognizes the full gross DTA balance. Second, it assesses whether a valuation allowance is needed.
- The Threshold: A valuation allowance must be recognized to reduce the DTA if, based on the weight of available evidence, it is more likely than not (a probability of >50%) that some portion or all of the deferred tax asset will not be realized.
- Evidence: Historical cumulative losses over recent years represent strong negative evidence that is difficult to overcome with optimistic management forecasts.
3. The IFRS Approach: The Direct Recognition Ceiling (IAS 12)
IFRS does not use a separate valuation allowance account. Instead, IAS 12 incorporates the realization criteria directly into the initial recognition decision:
- A deferred tax asset can only be recognized to the extent that it is probable that future taxable profits will be available against which the deductible temporary difference or unused tax losses can be utilized. Any excess unrecoverable DTA is left unrecognized off the balance sheet and disclosed in the notes.
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