Impairment vs. write-down vs. write-off: the FSA terms candidates blur
Three words, one messy corner of Financial Statement Analysis: impairment, write-down, write-off. They're related, they overlap in everyday usage, and in several languages they collapse into a single word. On the CFA Level I exam, using them interchangeably is how a candidate who understands the accounting still picks the wrong choice.
Here's the clean separation.
Write-down: the general act
A write-down is the broad action — reducing the carrying (book) value of an asset on the balance sheet because it's now worth less than what's recorded. It's the umbrella term. Reducing inventory to net realizable value is a write-down. Reducing a long-lived asset because its recoverable amount dropped is a write-down. The size can be partial — you mark it down to a new, lower value, not necessarily to zero.
Impairment: a write-down triggered by a specific test
An impairment is a specific kind of write-down: the one you record when an asset's carrying value is no longer supported and an impairment test is failed. The mechanics differ by framework — under IFRS you compare carrying amount to recoverable amount; under US GAAP, long-lived assets first fail an undiscounted-cash-flow recoverability screen, then the loss is measured against fair value. The nuance the exam often tests:
Impairment is about the accounting standard's trigger and test — not just "the asset lost value." You recognize it when the standard says a test is failed.
So every impairment is a write-down, but not every write-down is called an impairment. Inventory written down to NRV is a write-down handled under inventory rules; a machine written down after failing a recoverability test is an impairment. Same direction, different trigger and different standard.
Write-off: reducing the value to (near) zero
A write-off is a write-down taken all the way — the asset (or receivable) is removed or reduced to essentially nothing because it has no remaining recoverable value. A specific customer account you've decided is uncollectible gets written off. The distinction from a write-down is magnitude and finality: a write-down marks an asset lower; a write-off effectively eliminates it.
Why this trips up non-native English speakers
In everyday English these words already blur, and translation makes it worse: many languages have one common verb for "reduce the recorded value," so all three map back to the same mental word. You read the vignette, understand exactly what happened economically, and then can't separate which term the question is testing — because in your head they were never three different things.
This is a vocabulary-precision gap, not a concept gap. The accounting you probably already get; it's the labels that need pinning down.
Quick reference
| Term | What it is | How far |
|---|---|---|
| Write-down | General act of lowering an asset's carrying value | Usually partial; taken to ~zero it's called a write-off |
| Impairment | A write-down recognized when an impairment test is failed (IFRS: carrying > recoverable amount; US GAAP long-lived assets: undiscounted-cash-flow screen, then fair value) | Partial or full, per the test |
| Write-off | A write-down taken to (near) zero — asset/receivable removed | Full — value eliminated |
Think of them as a hierarchy: write-down is the category, impairment is a triggered subtype, write-off is the extreme end. When a question uses one deliberately, that precision is usually the point.
This is the same family of trap as the must vs. should distinction in Ethics — a small wording difference that decides the answer. Keep a running glossary of the terms you re-translate in your head, and drill them until you react to them in English.
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And if English isn't your first language: every concept is taught in English with your native language one tap away (9 study languages) — so exam wording stops being the thing that costs you points.
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