ASC 280 Reportable Segments — Core Rule

Under ASC 280 Reportable Segments — 10% Tests, an operating segment is reportable if it meets any one of three quantitative thresholds — revenue, reported profit or loss, or assets — each measured at 10% of the combined totals across all operating segments.

How ASC 280 Reportable Segments Works

• Identifying operating segments first: Before applying the 10% tests, management must identify operating segments as components of the entity for which discrete financial information is available and whose operating results are regularly reviewed by the chief operating decision maker (CODM). This precedes any quantitative threshold analysis (ASC 280-10-50-1).

• Revenue test: A segment is reportable if its reported revenue — including both external customers and intersegment sales or transfers — is 10% or more of the combined revenue of all operating segments (ASC 280-10-50-12(a)). Note that intersegment revenue is included in the denominator and the numerator; this is a common source of error.

• Profit or loss test: A segment qualifies if the absolute value of its reported profit or loss is 10% or more of the greater of: (1) the combined reported profit of all profitable segments, or (2) the absolute value of the combined reported loss of all loss segments (ASC 280-10-50-12(b)). Taking the greater of the two bases prevents artificially inflating or deflating the threshold.

• Assets test: A segment is reportable if its identifiable assets are 10% or more of the combined assets of all operating segments (ASC 280-10-50-12(c)). Combined segment assets may differ from consolidated total assets if corporate or unallocated assets exist.

• 75% revenue coverage floor: After applying the three 10% tests, management must verify that the reportable segments collectively account for at least 75% of consolidated external revenue. If not, additional segments must be designated as reportable until that threshold is met, even if they fail all three 10% tests (ASC 280-10-50-15).

• Aggregation and the "all other" category: Two or more operating segments may be aggregated if they have similar economic characteristics and meet specific qualitative criteria (ASC 280-10-50-11). Segments that do not qualify as reportable are combined into an "all other" reconciling category, which must be disclosed separately (ASC 280-10-50-17).

ASC 280 Reportable Segments — Practical Example

Assume a company has five operating segments with the following data (in millions):

Thresholds

• Revenue: 10% × $850 = $85M
• Profit test: Greater of combined profits ($80+$30+$10 = $120) vs. combined losses (absolute $65) → $120M; threshold = $12M
• Assets: 10% × $1,600 = $160M

Results: Segment A passes all three tests. Segment B passes revenue ($200 ≥ $85), profit ($30 ≥ $12), and assets ($400 ≥ $160). Segment C fails revenue ($80 < $85) but passes profit (|$60| ≥ $12) — reportable. Segment D fails revenue and assets but passes profit ($10 < $12 — actually fails). Segment E fails all three.

75% check: External revenue from A + B + C (assume all revenue is external) = $780 / $850 = 91.8% ✓ — threshold satisfied; D and E go to "all other."

While ASC 280 does not prescribe segment-specific journal entries (financial statements remain consolidated), the disclosure entry for segment reporting is analytical. A standard disclosure reconciliation memo entry might be:

ASC 280 Reportable Segments — Common Pitfalls

• Including intersegment revenue inconsistently: Practitioners sometimes exclude intersegment transfers from the revenue test denominator, understating it and incorrectly qualifying smaller segments. ASC 280-10-50-12(a) explicitly requires intersegment revenue in both the numerator and denominator.

• Misapplying the profit/loss test base: Using net combined profit/loss rather than the greater of combined profitable segments vs. combined loss segments inflates or deflates the threshold and misclassifies borderline segments (ASC 280-10-50-12(b)).

• Ignoring the 75% floor: Stopping at the 10% tests without confirming the 75% external revenue coverage requirement is a common audit deficiency and an SEC comment letter trigger (ASC 280-10-50-15).

ASC 280 Reportable Segments — Key Paragraphs

• ASC 280-10-50-1 — Definition of an operating segment and the CODM concept.
• ASC 280-10-50-12 — The three quantitative 10% tests (revenue, profit/loss, assets).
• ASC 280-10-50-15 — The 75% consolidated external revenue coverage floor.
• ASC 280-10-50-11 — Aggregation criteria for combining similar operating segments.
• ASC 280-10-50-17 — Disclosure requirements for the "all other" reconciling category.