Many income statements show where an expense sits—cost of sales, selling and administration, or research and development—but not enough about what the business consumed. That makes cost structures harder to compare and cash flows harder to forecast. The FASB’s expense-disaggregation update and IFRS 18 are changing the reporting conversation.
For controllers, this is a data-lineage and close-control project, not simply a note-writing exercise. Finance must trace expense categories from source systems and allocations through the general ledger, consolidation and final disclosure. This guide reflects requirements available as of October 31, 2026.
1. What FASB ASU 2024-03 requires
FASB issued ASU 2024-03 on November 4, 2024, adding Subtopic 220-40, Expense Disaggregation Disclosures. It applies to public business entities (PBEs), not private companies, not-for-profit entities or employee benefit plans. It requires specified information in annual and interim notes; it does not change expense recognition or require a new face-of-income-statement format.
For each relevant expense caption presented on the face of the income statement within continuing operations, a PBE discloses the applicable amounts included for these natural expense categories:
- Purchases of inventory;
- Employee compensation;
- Depreciation;
- Intangible-asset amortization; and
- Depreciation, depletion and amortization associated with oil-and-gas-producing activities, or other depletion expense.
A caption is relevant because of what it contains, not simply because it is called “cost of sales” or “SG&A.” The disclosure also includes certain amounts already required elsewhere in US GAAP, a qualitative description of residual amounts not separately quantified, and total selling expenses. In annual periods, the entity explains its definition of selling expenses. FASB does not prescribe one universal definition, so the company needs a supportable, consistent policy.
The effective dates are close for calendar-year issuers: annual periods beginning after December 15, 2026, and interim periods within annual periods beginning after December 15, 2027. Early adoption is permitted. The FASB’s January 6, 2025 clarification (ASU 2025-01) confirms that the interim date is tied to the beginning of the annual period. A calendar-year PBE therefore plans for annual adoption in 2027 and interim adoption in 2028. The FASB permits prospective or retrospective application.
2. How IFRS 18 changes the picture
IFRS 18, issued in April 2024, is effective for annual periods beginning on or after January 1, 2027, with early application permitted. It replaces IAS 1 and introduces operating, investing and financing categories (alongside income taxes and discontinued operations), defined subtotals including operating profit and profit before financing and income taxes, disclosures for management-defined performance measures, and stronger aggregation and disaggregation principles.
For operating expenses, an entity presents line items by nature, by function, or using both, choosing the approach that gives the most useful structured summary. If it presents operating expenses by function, paragraph 83 requires a single note with totals for depreciation, amortisation, employee benefits, impairment losses and reversals for non-financial assets, and inventory write-downs and reversals. The note also shows how those amounts relate to functional line items.
A current implementation point matters: in an April 2026 agenda decision, the IFRS Interpretations Committee concluded that paragraph 83 applies to any operating-category line item comprising expenses classified by function—including amounts classified that way because another IFRS requirement directs the presentation. Nature amounts disclosed can include costs capitalised in assets, not only expenses recognised in the period; when they do, the entity must explain this and identify the assets involved.
IFRS 18 is applied retrospectively under IAS 8. For the comparative period immediately before first application, annual financial statements reconcile each profit-or-loss line item between the restated IFRS 18 amount and the amount previously presented under IAS 1. A calendar-year IFRS reporter applying the standard in 2027 should therefore build and test its 2026 comparative data now.
3. US GAAP, IFRS and Canadian ASPE are not interchangeable
The projects share a goal—more transparent expense information—but their scope and required categories differ. Do not create one “global GAAP” mapping and assume it satisfies every reporting entity.
| Framework | Who is affected | Expense-disclosure focus |
|---|---|---|
| US GAAP ASU 2024-03 | Public business entities | Five specified natural categories, relevant captions in continuing operations, residual descriptions and selling-expense disclosure. |
| IFRS IFRS 18 | Entities preparing financial statements under IFRS | Nature/function presentation choice; if operating expenses are presented by function, specified nature-expense totals and their relationship to functional lines are disclosed. |
| Canadian ASPE CPA Canada Handbook, Part II | Private enterprises applying ASPE | Apply the ASPE presentation and disclosure requirements relevant to the entity. ASPE does not automatically adopt the new FASB or IFRS 18 schedules. |
In Canada, the applicable framework depends on the entity. The Accounting Standards Board supports IFRS for publicly accountable enterprises and establishes separate standards for private enterprises. A Canadian private enterprise may use ASPE or, where eligible and chosen, IFRS. If it reports under IFRS, IFRS 18 applies; if it reports under ASPE, it should not assume the FASB five-category table or IFRS 18 paragraph 83 applies. Confirm the reporting basis, securities-regulatory obligations and lender or contractual reporting commitments. See the AcSB’s framework priorities and its overview of Canada’s Part I (IFRS) and Part II (ASPE) choices.
4. Build the data model before drafting the note
Start with a cross-functional data inventory, not a spreadsheet assembled at year-end. For each entity and framework, identify required categories, source systems, owners, transformations and evidence.
| Data family | Potential source | Controller validation |
|---|---|---|
| Inventory purchases / material inputs | Procurement, inventory subledger, AP and cost accounting | Document the permitted measurement basis and reconcile to that basis. |
| Employee compensation / benefits | Payroll, HR, stock compensation and benefit systems | Reconcile source populations to the GL; identify allocations to functions and capital projects. |
| Depreciation and amortisation | Fixed-asset and intangible-asset subledgers | Reconcile subledger runs to GL postings; identify amounts capitalised in inventory or projects. |
| Impairment and inventory write-downs | Asset impairment models, inventory reserves and journals | Check completeness, reversals, mapping and reporting-period treatment under the applicable framework. |
| Functional captions and selling expenses | Chart of accounts, cost centres, functional areas and management reporting | Approve definitions, prevent inconsistent classification and retain evidence for changes. |
In SAP S/4HANA, the Universal Journal’s Account field covers G/L accounts and cost elements, which form part of the chart of accounts. SAP describes primary cost elements as operating costs such as wages and material costs, while secondary cost elements represent internal value flows such as allocations. This is a starting point, not a complete disclosure solution. Maintain a governed mapping from accounts and cost-element attributes to each framework’s categories, and separately track allocations, capitalisation and reclassifications. See SAP’s S/4HANA cost-element documentation.
5. Six controls to make the disclosure audit-ready
- Framework and scope sign-off: document each entity’s reporting framework, PBE status and effective date; reassess when reporting status changes.
- Controlled account mapping: version-control mappings from G/L accounts, cost elements and source codes to disclosure categories; independently approve changes.
- Completeness and accuracy: reconcile each disclosure data set to the trial balance and subledgers; investigate unmatched, duplicate and unmapped records.
- Allocation and capitalisation: test how payroll, depreciation, inventory costs and shared-service charges move between functions, inventory, assets and expense.
- Definitions and judgments: approve the US selling-expense definition and document IFRS function-versus-nature judgments and consistency.
- Disclosure review: tie note totals to source reports, verify comparative treatment, explain residual amounts and retain reviewer challenge and sign-off.
6. A practical implementation sequence for late 2026
For a calendar-year group, the timetable is tight. Confirm the framework inventory and appoint a finance owner in the next close cycle. Complete a gap assessment of the chart of accounts, payroll and fixed-asset data, inventory costing, allocations and consolidation rules. Build a prototype using 2026 year-to-date data, test it to the trial balance and assign source-system owners to close data gaps.
Before year-end, approve the mapping and definitions, test automated extracts, reconcile the prototype and prepare comparative schedules. IFRS reporters should include the profit-or-loss redesign and comparative reconciliation in the same programme. US PBEs should prepare the annual ASU 2024-03 note and plan interim reporting using the clarified effective date. Do not wait for the first filing to discover that a payroll feed, cost centre or capitalisation process cannot reproduce the required detail.
Conclusion
Expense disaggregation affects the chart of accounts, ERP reporting, cost accounting, consolidation and internal controls. The strongest response is a governed data model that preserves the distinction between natural expense and functional presentation, reconciles to the ledger and can be reproduced for each framework. Controllers who begin with scope, mapping and evidence now can avoid a fragile year-end manual process.
Disclaimer: This article is for general informational purposes only and is not accounting, audit, legal or regulatory advice. Requirements depend on the reporting framework and entity facts. Confirm current authoritative literature and obtain professional advice before making accounting or disclosure decisions.
