A valuation allowance offsets a deferred tax asset when it's unclear whether the company will generate sufficient future taxable income to realize the benefit. This guide covers the assessment framework, audit scrutiny, and common arguments between preparers and auditors.
Why Valuation Allowances Exist
IAS 12 requires recognition of DTAs only if it is probable that the entity will have taxable income to benefit from the asset. A valuation allowance is the contra-asset account that offsets (reduces) the DTA when this probability is uncertain.
Example
- Gross DTA on loss carryforward: £10m (£50m loss × 20% tax)
- Assessment: Company has been loss-making for 5 years; recovery is uncertain
- Valuation allowance: £7m (70% reserved against)
- Reported DTA on balance sheet: £3m (£10m −’ £7m allowance)
Valuation Allowance Assessment Framework
Step 1: Identify All Deferred Tax Assets
- Loss carryforwards
- Tax credit carryforwards
- Deductible temporary differences (warranty provisions, etc.)
Step 2: Assess Realizability
Will the company generate taxable income equal to or exceeding the DTA amount within the carryforward period?
Step 3: Determine Allowance %
- 0% allowance: High probability of realization (recent profitability, strong outlook)
- 25— 50% allowance: Moderate uncertainty (recovery plan exists but execution risk)
- 75— 100% allowance: Low probability (sustained losses, no credible plan)
Positive Evidence Supporting DTA Recognition (Lower Allowance)
Recent Profitability
Company has been profitable in recent years and losses are temporary/cyclical.
Example: Cyclical retailer with £5m loss in Year 1 (recession). Prior 5 years: £3m, £4m, £5m, £4m, £3m average profit. Outlook suggests recovery.
Valuation allowance: 0— 25% (loss is likely temporary)
Backlog / Orders on Hand
Contracted revenue provides visible path to future profit.
Strong Industry Fundamentals
Industry growth/demand supports recovery.
Credible Management Track Record
Management has successfully turned around businesses before.
Negative Evidence Against DTA Recognition (Higher Allowance)
Sustained Losses
3+ consecutive years of losses with no improvement trajectory.
Deteriorating Fundamentals
Industry decline, loss of key customer, or product obsolescence.
Weak Management or Failed Turnarounds
Prior turnaround attempts failed; current plan lacks credibility.
Technological Disruption
Business model at risk from new technology or competitor.
Worked Example: Allowance Assessment
Company: GlobalTech Manufacturing
Situation: Loss-making; £30m tax loss carryforward (gross DTA: £6m at 20% rate)
Year-by-Year Analysis
| Period | Profit/(Loss) £m | Notes |
|---|---|---|
| 2023 | (8) | Supply chain disruption |
| 2024 | (5) | Continued market softness |
| 2025 (current) | (3) | Showing improvement; costs cut |
| 2026 (forecast) | 1 | Return to profit expected |
| 2027— 2029 (forecast) | 3— 5 per year | Gradual recovery |
Positive Factors
- Trend: Losses narrowing (£8m →’ £5m →’ £3m)
- Forecast: Return to profit by 2026
- Cost actions: Structural cost reduction underway
- Industry: Expected to recover post-2025
Negative Factors
- Current year still loss-making
- Forecast recovery is optimistic; execution risk
- If forecasts miss, DTL will expire (under carryforward limits)
Valuation Allowance Assessment
- Gross DTA: £6m
- Probability of realization: 60% (recovery likely, but execution risk)
- Valuation allowance: 40% = £2.4m
- Reported DTA on balance sheet: £6m −’ £2.4m = £3.6m
Audit Scrutiny of Valuation Allowances
Challenge 1: Management Bias
Auditor concern: Management is inherently optimistic about recovery; allowance % may be too low.
Auditor response: Independently assess forecasts; compare to peer performance; stress-test assumptions.
Challenge 2: Historical Accuracy
Auditor concern: Company's past forecasts were inaccurate; current forecast unreliable.
Auditor response: Review prior forecasts vs. actual; adjust for forecasting bias.
Challenge 3: Carryforward Expiration Risk
Auditor concern: DTA may expire before company generates income to utilize it.
Auditor response: Calculate when DTA expires; compare to forecast income generation period.
Adjustment Triggers
Scenario 1: Allowance Too Low
Finding: 20% allowance, but company's actual performance 10% below forecast. Allowance likely inadequate.
Auditor action: Increase allowance to 40— 50%; reduce reported DTA.
Scenario 2: Allowance Too High
Finding: 100% allowance on 5-year loss carryforward; company just returned to profit with 5-year profit forecast of £20m. DTA is highly likely to be realized.
Auditor action: Reduce allowance to 10— 20%; increase reported DTA and reduce tax expense (benefit to earnings).
Real-Life Case Study: Reassessing Recoverability of a DTA
Scenario. A company recognised a £900k deferred tax asset on losses two years ago. Trading has since deteriorated and the forecast now supports only £400k of usable losses.
Treatment. IAS 12 uses a recognition/derecognition model (rather than a US-style separate valuation allowance): the carrying amount of the DTA is reduced to the recoverable £400k, with a £500k charge to P&L. It is reinstated later only if future profits again become probable.
Takeaway. A DTA is not "book it once and forget it", it is reassessed every reporting date. Under IFRS the reduction is made directly against the asset, so watch the terminology if you also report under US GAAP, where a contra "valuation allowance" is used instead.
Illustrative composite scenario for educational purposes. Figures are indicative and do not represent any specific company.
• IAS 12 Tax Loss Carryforwards: DTA Recognition & Utilization
• IAS 12 Tax Rate Changes: Remeasuring Deferred Tax Balances
• IAS 12 Deferred Tax on OCI: Recognizing Tax Effects in Other Comprehensive Income
• IAS 12 in M&A: Deferred Tax on Acquisition Fair Value Adjustments