IFRS 8 Operating Segments: The Standard That Measures Nothing

How the management approach turns segment reporting into a data and systems challenge

IFRS 8 contains a section headed Measurement, so the title needs one qualification. The standard does not literally contain no measurement requirements. What it lacks is an independent measurement model of its own.

Most IFRS Accounting Standards tell an entity how to recognise or measure something. IFRS 8 does something different. It takes the segment measures used internally by management, requires the entity to explain them, and reconciles them to the corresponding IFRS amounts. It does not attempt to make those internal measures uniform across companies.

That makes IFRS 8 look light. It is not. The burden has simply moved from accounting measurement into management structure, disclosure judgement and data architecture.

1. Where segment reporting came from

In segment reporting, the United States moved first. The international standard-setter initially moved in the same direction, but stopped short of adopting the pure management approach. It completed that move only with IFRS 8.

1976 — SFAS 14 (United States). The FASB required companies to disclose revenue, profitability and identifiable assets by industry segment and geographical area. The weakness was segment identification. “Industry segment” left room for judgement, and companies could combine economically different activities into broad groupings that revealed little about how the business actually worked.

1981 — IAS 14 (international). The IASC issued Reporting Financial Information by Segment, requiring information by industry and geography. Like SFAS 14, it approached the entity through externally defined categories rather than simply adopting the structure used by management.

1997 — two different responses to the same problem. In the United States, SFAS 131 replaced SFAS 14 and introduced the management approach. Operating segments were identified from the components whose results were regularly reviewed by the person or group responsible for allocating resources and assessing performance.

IAS 14 was also substantially revised in 1997, but it did not adopt that approach in full. IAS 14R used the entity’s organisational and internal reporting structure as an important starting point, while retaining an external risk-and-return framework. It required a primary reporting format based on the dominant source and nature of the entity’s risks and returns, together with a secondary format for the other axis. Management reporting informed the answer, but did not determine it by itself.

2006 — IFRS 8. The IASB replaced IAS 14R with IFRS 8, effective for annual periods beginning on or after 1 January 2009. IFRS 8 adopted substantially the same management approach as SFAS 131: the entity would report its segments through the eyes of management rather than reshape them through an externally imposed risk-and-return model.

The move was easier because it did not change the entity’s assets, liabilities, revenue or profit. It changed how the business was divided for disclosure. Convergence could therefore alter what investors saw without changing the totals in the primary financial statements.

That convergence was substantial, but never absolute. It has also widened again. The FASB’s ASU 2023-07 introduced additional US requirements concerning significant segment expenses, the chief operating decision maker and interim disclosures. IFRS 8 has not adopted an equivalent package. The standards still share the same core architecture, but their disclosure requirements are no longer as closely aligned as they once were.

2. The architecture of the standard

IFRS 8 cannot be read in quite the same way as a conventional recognition-and-measurement standard. Its core principle asks an entity to disclose information that enables users to evaluate the nature and financial effects of its business activities and the economic environments in which it operates. The rest of the standard turns that principle into a sequence of decisions.

The standard can therefore be understood as two connected systems. The first is the management view: identify the components reviewed internally, decide which are reportable and disclose the measures management uses. The second is a safety net: reconcile those measures to the financial statements and provide certain entity-wide information that the management view might otherwise omit.

3. Operating Segments

Who is the CODM?

Everything begins with identifying the chief operating decision maker (CODM).

The CODM is a function, not necessarily a formal title or a single individual. It may be the chief executive officer or chief operating officer, but it may also be an executive committee or another group of decision makers.

The test is functional:

• Who allocates resources to the different components of the entity?

• Who assesses how those components are performing?

The person or group that performs these functions in practice is the CODM. Identifying the CODM is not a preliminary formality: the information reviewed by the CODM shapes the entity’s operating segments.

What is an operating segment?

Once the CODM has been identified, the next question is what components of the entity the CODM actually reviews.

A component is an operating segment when all three conditions apply:

• it engages in business activities from which it may earn revenue and incur expenses;

• its operating results are regularly reviewed by the CODM for resource-allocation and performance-assessment purposes; and

• discrete financial information is available for it.

These conditions connect the segment definition directly to internal management. A product line, geographical region, legal entity or another business unit may be an operating segment—but only if it functions as a component in the way IFRS 8 describes.

The organisational chart alone does not determine the answer. Nor does the label management gives to a division. What matters is how the business is monitored and how decisions are made in practice.

This can require particular judgement in a matrix organisation. If the CODM regularly reviews overlapping sets of information—for example, by product and by geography—the entity does not automatically treat both as separate segment structures. It determines which set constitutes its operating segments by reference to IFRS 8’s core principle and should document why that axis best reflects how resources are allocated and performance is assessed.

Information about the other axis may still be provided through the entity-wide product, service or geographical disclosures, but it does not constitute a complete second segment presentation.

If the CODM is identified incorrectly, the components examined under these conditions may also be wrong. The error then flows through the rest of the standard, affecting which operating segments are identified, which may be aggregated and which must ultimately be reported separately.

4. Reportable segments

Once the operating segments have been identified, the entity determines which of them must ultimately be reported separately. That process begins by considering whether some may be aggregated.

Aggregation — where the pressure sits

After identifying operating segments, management determines whether some may be aggregated.

Under paragraph 12, two or more operating segments may be combined only when aggregation is consistent with the core principle, the segments have similar economic characteristics, and they are similar in each of the following respects:

• the nature of their products and services;

• the nature of their production processes;

• the type or class of customer;

• the methods used to distribute products or provide services; and

• where applicable, the nature of the regulatory environment.

Aggregation is where the management approach encounters its natural tension. Fewer reported segments mean less commercially sensitive information and a shorter note. But excessive aggregation can conceal the different economics of the businesses inside the group.

That is why IFRS 8 requires disclosure of the judgements made in applying the aggregation criteria, including the economic indicators considered. Once any permitted aggregation has been determined, the entity applies the quantitative tests to decide which segments must be reported separately.

Quantitative thresholds — which segments must be shown separately?

The 10% tests. An operating segment is reportable if it meets any one of three tests:

• its reported revenue, including external and intersegment revenue, is at least 10% of the combined internal and external revenue of all operating segments;

• the absolute amount of its reported profit or loss is at least 10% of the greater, in absolute terms, of the combined profit of all profitable operating segments and the combined loss of all loss-making operating segments; or

• its assets are at least 10% of the combined assets of all operating segments.

Any one test is sufficient. The profit-or-loss test is the easiest to misapply. Its denominator is not the net profit of all segments. Profitable segments and loss-making segments are totalled separately, and the larger absolute amount is used.

Voluntary separate disclosure. An operating segment that fails all three tests may nevertheless be treated as reportable and disclosed separately if management believes that information about the segment would be useful to users of the financial statements.

Combining below-threshold segments. Operating segments that fail all three 10% tests may still be combined to produce a reportable segment. This is permitted only when the segments have similar economic characteristics and share a majority of the aggregation criteria in paragraph 12.

This paragraph 14 combination is distinct from paragraph 12 aggregation. Paragraph 12 determines whether operating segments may be treated as a single operating segment before the quantitative tests are applied. Paragraph 14 applies after the tests and allows information about below-threshold segments to be combined for external reporting.

The 75% coverage rule. The entity then checks whether its reportable segments account for at least 75% of its external revenue. If they do not, additional operating segments must be identified as reportable—even if they fail all three 10% tests—until the 75% threshold is reached.

This prevents too much of the entity’s external revenue from disappearing into a residual category.

All other segments. The remaining operating segments and other business activities that are not separately reportable are combined into an “all other segments” category. This category is disclosed separately from other reconciling items, and the sources of its revenue must be described.

The practical limit. IFRS 8 does not impose a hard maximum on the number of reportable segments. However, when the number rises above ten, the entity should consider whether the segment information has become excessively detailed.

Read together, these requirements form a single filtering process. Management first identifies the components of the business and considers whether any may be aggregated. The quantitative tests then identify the larger segments, paragraph 14 provides a limited route for combining smaller ones, and the 75% rule ensures that the resulting disclosure still covers most of the entity’s external revenue.

The arithmetic is not the intellectual centre of IFRS 8, but it turns the management view into the segments users ultimately see.

5. From management’s view to external reporting

Segment measures and reconciliation

Once the reportable segments have been determined, the same management approach governs the measures disclosed for them.

IFRS 8 does not prescribe a standard measure of segment profit or loss. Instead, the measure reported for each reportable segment is based on the information used by the CODM to allocate resources and assess performance.

That measure need not be calculated in accordance with IFRS Accounting Standards. It may exclude items included in the financial statements, include internal allocations or differ from a subtotal presented in the statement of profit or loss.

This is both the strength and the cost of the management approach. Its strength is relevance: users see the business substantially through the same lens management uses to make decisions. Its cost is comparability: two companies with economically similar businesses may report different segment structures and different measures of segment profit or loss because they are organised and managed differently.

IFRS 8 does not eliminate that loss of comparability. Instead, it makes the management view transparent and provides a bridge back to the financial statements. The entity explains how its segment measures are determined and reconciles the total of reportable segment profit or loss—normally to the entity’s profit or loss before tax and discontinued operations.

The reconciliation does not standardise the segments or their measures. It shows how the total of the internally reported measures connects to the entity-wide IFRS amount.

IFRS 8 therefore makes the internal management view visible without making it uniform. Management determines the lens; explanation and reconciliation connect that lens to the IFRS financial statements.

Restatement

The management approach also affects comparative information. If an internal reorganisation changes the composition of the entity’s reportable segments, IFRS 8 generally requires prior-period segment information to be restated on the new basis. The same generally applies when an operating segment becomes reportable in the current period under the quantitative thresholds. This is not the correction of an error: the entity’s historical totals remain unchanged, while the information is reorganised to preserve comparability.

The requirement sounds simple. In practice, it can be a significant systems exercise. Historical transactions may not contain the data, organisational codes or allocation logic needed for the new segment structure, leaving entities to reconstruct comparative information through mapping, additional allocations and manual adjustments.

The accounting totals do not change. The data architecture may have to.

6. Entity-wide disclosures

IFRS 8’s entity-wide disclosures operate as a safety net around the management approach. They require information about products and services, geographical areas and reliance on major customers, even if those dimensions do not correspond to the entity’s reportable segments.

Each requirement creates a different data problem. Products and services require a consistent classification, geography applies different geographical bases to revenue and assets, and major-customer disclosure requires customer identities to be resolved across the group.

Products and services: a taxonomy problem

Paragraph 32 requires external revenue to be disclosed for each product and service, or each group of similar products and services. The requirement applies on an entity-wide basis, regardless of how management defines the reportable segments.

The accounting amount may be readily available while the classification is not. Different subsidiaries may use different product codes, descriptions and levels of detail for economically similar offerings. Acquired businesses may retain their own product hierarchies, while contracts that combine products and services may not align neatly with the group’s disclosure categories.

Producing the disclosure therefore requires a common taxonomy and a consistent mapping from local product masters and sales systems. The amounts must also represent external revenue after intragroup transactions have been eliminated.

The standard provides relief when the necessary information is unavailable and the cost of developing it would be excessive, but that fact must be disclosed.

One revenue total can conceal many incompatible product classifications.

Entity-wide geography: a short requirement with a long data trail

Paragraph 33 requires two forms of geographical information on an entity-wide basis, whether the entity has many reportable segments or only one:

• revenue from external customers attributed to the entity’s country of domicile and to all foreign countries in total, with any material individual foreign country disclosed separately; and

• specified non-current assets located in the country of domicile and in all foreign countries in total, again with material individual foreign countries disclosed separately.

The standard permits an exception when the necessary information is unavailable and the cost of developing it would be excessive, but that fact must be disclosed.

The text is short. The underlying data problem is not, because revenue and assets are organised on different geographical dimensions.

Revenue follows the entity’s attribution policy; assets follow location. IFRS 8 does not prescribe a single basis for attributing external revenue to countries. An entity might use customer destination, billing location, place of sale or another reasonable basis, but it must disclose the basis selected. Non-current assets, by contrast, are reported according to where they are located.

Even the asset concept is not simply the non-current total from the statement of financial position. For this disclosure, non-current assets exclude financial instruments, deferred tax assets, post-employment benefit assets and rights arising under insurance contracts. The entity therefore needs a subtotal constructed specifically for paragraph 33.

Nor is a continent-only analysis sufficient when an individual foreign country is material. The required structure is the country of domicile, all foreign countries in total and separate disclosure of material foreign countries. Regional subtotals such as Europe or Asia may be added, but do not replace the country-level assessment.

Now place those requirements inside a group with several consolidation layers.

External revenue after intragroup elimination

Suppose a product is manufactured by a subsidiary in one country, transferred to a distribution subsidiary in a second, and sold to an external customer in a third. The intragroup sale is eliminated on consolidation. Only the final external sale remains.

If the group attributes revenue by final customer destination, the required country may not exist in the manufacturer’s ledger, and it may not survive in the data passed through each sub-consolidation. The consolidated trial balance can show the correct amount of external revenue while no longer retaining the dimension needed to allocate it by country.

This does not make the disclosure impossible. The destination may be available in the distributor’s customer master, sales subledger or shipping data. But it means that the financial amount and the geographical attribute may need to travel through different systems and be joined under a consistent group policy.

Asset location below the legal-entity level

Consolidation systems are commonly organised around legal entities and accounts. Asset location does not always follow that structure. One entity may hold property and equipment in several countries, while intangible assets and right-of-use assets may require a specific attribution policy because they do not have an obvious physical location.

By the time a sub-consolidated balance reaches the parent, the country dimension may already have been summarised away. Producing the paragraph 33 amount may therefore require location-tagged information from fixed-asset registers, lease systems or reporting packages, together with the exclusions required by the standard.

The practical problem is not simply collecting more numbers. It is maintaining definitions across the group:

• which revenue-attribution basis the group uses;

• how asset location is determined for balances without an obvious physical location;

• which non-current assets are excluded;

• how intragroup transactions are eliminated without losing the external-customer dimension; and

• how country-level data is retained even when a country is not material in the current period.

Materiality can change. A country included only within the foreign total this year may need separate disclosure next year, together with comparative information. If the underlying country data was discarded because it was immaterial at the time, the comparative amount may need to be reconstructed later.

This is why paragraph 33 is not merely a year-end note-production exercise. The necessary dimensions must either be captured upstream or remain recoverable from reliable transaction records, subledgers and subsidiary submissions. A consolidated trial balance alone will often not be enough.

Get the reporting design right and the note can be assembled routinely. Get it wrong and the problem becomes visible only at period-end, when the consolidated figures are complete but the dimensions needed to explain them are not.

Major customers: one customer, many names

Paragraph 34 requires disclosure when revenue from transactions with a single external customer represents 10% or more of the entity’s revenue. The entity discloses the amount of revenue from each such customer and identifies the segment or segments reporting that revenue, but it need not disclose the customer’s identity.

The difficult part may be determining who the single customer is. The same customer group may appear under different legal names, local subsidiaries, abbreviations or customer codes across the group. IFRS 8 also treats entities known to be under common control as a single customer for this purpose.

The 10% test therefore cannot always be performed by simply aggregating customer codes from subsidiary ledgers. It may require a group-wide customer master, ownership information and mapping between local customer records and their ultimate controlling entity. Changes in names, ownership and corporate structures must also remain traceable between reporting periods.

Government-related customers add another layer of judgement because the entity must assess whether a government and entities under its control should be treated as a single customer.

The disclosure may not reveal the customer’s name, but producing it can still require the group to know precisely who that customer is.

The disclosure hides the name. The reporting process cannot.

7. The finished product

This is everything the standard produces — and everything above was the cost of producing it.

8. Where IFRS 8 meets IFRS 5

IFRS 8 and IFRS 5 may both describe the same business, but they do so for different purposes. IFRS 8 identifies components through the information reviewed by the CODM. IFRS 5 identifies assets and disposal groups held for sale and, at a higher threshold, operations that must be presented separately as discontinued.

Classification under IFRS 5 does not automatically make an operating segment disappear. The business may continue to be reviewed separately by the CODM and may remain a reportable segment. IFRS 8 instead reconciles total segment profit or loss to the entity’s profit or loss before tax and discontinued operations. If a disposal also changes the internal reporting structure, the segment composition and comparative information may need to change.

The important point is that the standards use different classification axes whose boundaries need not match. We examine that relationship in detail in our IFRS 5 article.

9. Conclusion

IFRS 8 appears light because it creates no independent measurement model. But its burden lies elsewhere.

A single segment note draws on several dimensions that do not naturally align: management structure, products and services, revenue geography, asset location and customer identity. Consolidated totals may be correct even after the attributes needed to explain them have been lost.

The practical challenge is therefore not measurement, but preserving multiple views of the same business across systems and reporting layers.

The lightest standard to compute can be among the heaviest ones to feed.

Professional Slide Deck Available

The key concepts from this article are also available as a fully editable, white-label PowerPoint deck designed for corporate training, CPD, consulting, and client presentations.

Practice Questions

Practice questions based on this article are available on IFRS-OneQ. Reinforce what you've read — one question at a time.

Disclaimer: This article is for educational purposes only and reflects the author's interpretation of accounting standards and their history. It does not constitute professional accounting, tax, or financial advice. Readers should consult qualified professionals on specific transactions.