Explain segment reporting under IFRS 8.
A core Group Accounting interview question — asked in analyst and associate interviews across IB, PE, and the Big 4.
THE SHORT ANSWER
IFRS 8 uses the 'management approach': you report operating segments the way the chief operating decision-maker (CODM) actually reviews them to allocate resources and assess performance — so the segments and the numbers mirror internal management reporting, even if that differs from IFRS measurement. An operating segment qualifies for separate disclosure if it meets quantitative thresholds (≥10% of combined revenue, reported profit/loss, or assets), and you keep adding segments until reported segments cover ≥75% of external revenue. For each you disclose revenue (external and inter-segment), a measure of profit/loss, and assets (and liabilities if reported to the CODM), plus the basis of measurement. The practical challenges: reconciling segment totals (which may use non-IFRS internal measures) back to the consolidated IFRS figures, entity-wide disclosures (products, geographies, major customers ≥10%), and that the management view can reveal commercially sensitive information. The point is decision-useful, management-consistent disaggregation.
WHAT INTERVIEWERS LISTEN FOR
- ✓Management approach: segments as seen by the CODM (mirror internal reporting)
- ✓Thresholds: ≥10% revenue/profit/assets; reported segments ≥75% of external revenue
- ✓Disclose revenue, profit measure, assets + measurement basis
- ✓Reconcile segment totals to consolidated IFRS; entity-wide & major-customer disclosures
COMMON MISTAKES
- ✗Defining segments by IFRS lines rather than the CODM view
- ✗Forgetting the reconciliation to consolidated figures
- ✗Missing the 10%/75% thresholds
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