IFRS 8, Operating Segments, is one of the most under-revised standards on the ICAG syllabus — precisely because it feels like pure disclosure with nothing to compute. That reputation is wrong. Buried inside the standard is a fully mechanical reportability test, and it’s exactly the kind of thing examiners can turn into a clean, markable question.
What an Operating Segment Actually Is
Under paragraph 5 of IFRS 8, an operating segment is a component of an entity that (1) engages in business activities that may earn revenue and incur expenses — including transactions with other parts of the same entity, (2) has its operating results regularly reviewed by the entity’s chief operating decision maker (CODM) to allocate resources and assess performance, and (3) has discrete financial information available. The CODM is a function, not necessarily a named role — it might be the CEO, the COO, or a group of executive directors, per paragraph 7.
Just as important is what’s explicitly excluded. Paragraph 6 states that corporate headquarters and an entity’s post-employment benefit plans are not operating segments — a detail examiners love to test by describing a head office cost centre and seeing whether you incorrectly fold it into the segment analysis.
The Three-Threshold Test
Paragraph 13 sets out three separate quantitative thresholds, and a segment only needs to clear one to be reportable:
- Revenue (external plus intersegment) is 10% or more of combined revenue of all operating segments.
- The absolute amount of reported profit or loss is 10% or more of the greater of the combined profit of all profit-making segments, or the combined loss of all loss-making segments.
- Assets are 10% or more of combined assets of all operating segments.
The Trap Almost Everyone Falls Into
Students who only check the revenue threshold routinely miss segments that clear the profit-or-loss or assets threshold instead. Because a segment needs to clear just one of the three doors, checking only one door and stopping there systematically understates the number of reportable segments — and every mark attached to a missed segment’s disclosure is lost.
The second, less-known trap is the 75% rule in paragraph 15: even after correctly applying the three thresholds, if the total external revenue of your identified reportable segments is under 75% of the entity’s total revenue, you must keep adding segments — even ones that individually fail every threshold — until at least 75% of revenue is captured.
Exam tip: Build a table: one row per segment, three columns for revenue / profit-or-loss / assets, tick whichever threshold each segment clears. Sum external revenue of ticked segments against total revenue — if under 75%, add the next-largest segments until you clear it. Anything left over goes into a described “all other segments” category (paragraph 16) — don’t just label it, explain what’s in it.
Conclusion
IFRS 8’s reportability test is entirely mechanical and entirely learnable in one sitting — the mistake is assuming there’s nothing here to learn at all. Master the three thresholds, the 75% top-up, and the major-customer disclosure rule (10% of revenue from one customer triggers disclosure of the fact and amount, but never the customer’s name, per paragraph 34), and this becomes one of the most reliable mark-earning standards on the whole syllabus.
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