Accounting & Reporting

Valuation Allowances on Deferred Tax Assets

Know when a deferred tax asset must be written down, when it can be released, and why three years of cumulative losses is the hardest piece of evidence in accounting to argue with.

  • Expert
  • 12 min total
  • 12 chapters

What decision this helps you make: Whether a valuation allowance is required against a deferred tax asset, how much, and what objectively verifiable evidence would justify releasing it.

What this topic is

A deferred tax asset represents future tax deductions or credits — from loss carryforwards, from expenses recognized in the accounts before they are deductible, from tax credits not yet used. ASC 740 says you recognize the asset in full, and then reduce it by a valuation allowance if it is more likely than not that some or all of it will not be realized. The allowance is where all the judgement is.

Why it matters

Recording a valuation allowance is often the largest single charge a loss-making company will take, and it arrives at the worst possible moment — a company posts a bad year and then adds a non-cash tax charge on top because the bad year is itself the evidence. Releasing one is the mirror image: a large non-cash benefit, sometimes doubling reported earnings, in a year when nothing about the underlying business changed. Both events are widely misread, and both are heavily scrutinized for timing.

Who should learn it

Tax directors and controllers, CFOs at companies with loss histories or recent turnarounds, audit committees, investors modelling the cash tax versus book tax gap, and anyone valuing a company whose earnings include a tax benefit.

What you will understand

  • The four sources of taxable income that can support realization, and their relative evidential strength
  • Why a three-year cumulative loss is treated as near-decisive negative evidence, and what it takes to overcome
  • How character and expiry matching mean an asset can be unrealizable even with abundant projected income
  • What a release looks like, why it is a cliff rather than a gradient, and how the market misreads it

Prerequisites

Common misconception

"We are projecting strong profits, so the deferred tax asset is fine." Projections are the weakest form of positive evidence in the ASC 740 hierarchy precisely because they are unverifiable, and a company in a cumulative loss position is asserting a forecast that its own recent results contradict. The standard weighs evidence by the extent to which it can be objectively verified — and a three-year cumulative loss is about as objectively verifiable as evidence gets.