IFRS 18 Explained: The New Financial Statement Presentation Standard Replacing IAS 1
Financial reporting is undergoing its most significant redesign in decades. IFRS 18 — officially titled Presentation and Disclosure in Financial Statements — was issued by the International Accounting Standards Board (IASB) on April 9, 2024, and it replaces IAS 1, the standard that governed financial statement presentation for nearly thirty years. For multinational companies, private equity portfolio companies, and any organization reporting under IFRS, IFRS 18 represents a fundamental shift in how financial performance is communicated to investors.
At SW Accounting & Consulting Corp, we work with clients who are navigating both IFRS and US GAAP reporting environments. Understanding IFRS 18 is becoming essential even for US-based businesses with international subsidiaries or investors who require IFRS-compliant financial statements. This guide breaks down the key requirements, the critical 2026–2027 transition timeline, and what practical steps companies need to take right now.
Why Was IFRS 18 Needed to Replace IAS 1? 📊
IFRS 18 was created because IAS 1’s broad flexibility allowed companies to present financial results in inconsistent ways, making meaningful comparisons between companies difficult for investors.
Over time, companies developed the practice of reporting “alternative performance measures” (APMs) — metrics like adjusted EBITDA, underlying profit, or adjusted earnings — outside of audited financial statements to present their results more favorably. While these measures can provide useful context, the lack of standardization made it nearly impossible for investors to compare companies on a like-for-like basis.
IAS 1 was also simply too flexible in how companies could structure their income statements, leading to a patchwork of different presentations even within the same industry. The IASB concluded that a more structured approach was needed — one that mandates consistent subtotals, standardized categories, and clear reconciliation of management’s own performance measures to audited figures.
IFRS 18 is the first new IFRS accounting standard issued in seven years (since IFRS 17 in 2017), underscoring how significant this change is to the global reporting landscape.
What Are the Core Requirements of IFRS 18? 📋
IFRS 18 introduces three mandatory new categories for classifying income and expenses in the statement of profit or loss, required subtotals, and new disclosure rules for management-defined performance measures.
1. New Income and Expense Categories
Under IFRS 18, all income and expenses in the statement of profit or loss must be classified into one of these categories:
- Operating — Income and expenses arising from a company’s main business activities
- Investing — Returns from investments in associates, joint ventures, and assets not part of main operations
- Financing — Income and expenses arising from liabilities related to raising finance only
- Income taxes — Tax-related items
- Discontinued operations — Results from disposed or held-for-sale business units
2. Mandatory Subtotals in the Income Statement
IFRS 18 requires all entities to present two new mandatory subtotals in their statement of profit or loss:
- Operating profit — A standardized measure of core operating performance
- Profit before financing and income tax — Providing a clearer bridge between operations and bottom-line results
These mandatory subtotals will allow investors to make direct comparisons between entities that were previously impossible due to inconsistent income statement structures.
3. Management-Defined Performance Measures (MPMs)
This is perhaps the most significant new requirement. Under IFRS 18, if a company uses any metric derived from the income statement to communicate financial performance to the public — such as EBITDA, adjusted operating profit, or “underlying earnings” — it must now:
- Disclose that measure within the financial statements (not just in investor presentations)
- Provide a clear reconciliation from the MPM to the most directly comparable IFRS subtotal
- Explain why the MPM is useful to investors
- Disclose the tax effect of the reconciling items
For our clients with international operations or investors, IFRS 18’s MPM disclosure requirement is the change that will require the most internal preparation. Companies that have historically communicated “adjusted EBITDA” or similar measures only in earnings releases will now need robust processes to disclose these figures — with full reconciliations — in their audited financial statements. This bridges the gap between management’s view of performance and the audited numbers investors can trust.
How Does IFRS 18 Change Expense Presentation? 📈
IFRS 18 allows companies to present operating expenses either by nature or by function — but whichever method is chosen must be applied consistently, and additional disclosures are required when presenting by function.
| Presentation Method | Example Line Items | Additional Disclosure |
|---|---|---|
| By Nature | Salaries, depreciation, utilities, materials | None required |
| By Function | Cost of sales, selling expenses, G&A | Must also disclose expenses by nature in notes |
Companies that currently present by function must now include additional note disclosures breaking down expenses by nature (e.g., total depreciation, total employee costs). This increases transparency but also increases disclosure volume — requiring more robust financial reporting processes.
When Does IFRS 18 Apply and What Is the Transition Timeline? 📅
IFRS 18 is mandatory for annual periods beginning on or after January 1, 2027 — but since the standard requires retrospective application, the 2026 comparative period must also be presented under IFRS 18 rules.
This is the critical urgency that many companies are underestimating. Because IFRS 18 requires retrospective restatement of the comparative period, companies preparing 2027 financial statements will also need to restate their 2026 figures under the new standard. That means data capture and classification decisions made during 2026 must already align with IFRS 18 categories — even before the standard is technically effective.
Companies that delay IFRS 18 implementation planning until 2027 will face a painful retrospective restatement exercise. The 2026 comparative figures must be presentable under IFRS 18 when 2027 financial statements are prepared. Start mapping your income statement categories, identifying your MPMs, and assessing system readiness now — in 2026.
Key transition dates:
- April 9, 2024 — IFRS 18 issued by IASB
- January 1, 2026 — Comparative period begins (data must be captured in IFRS 18 format)
- January 1, 2027 — Mandatory effective date for IFRS 18
- Early 2028 — First annual IFRS 18–compliant financial statements due for most calendar-year entities
Early adoption is permitted. Companies that wish to adopt IFRS 18 before the mandatory date should coordinate with their auditors and inform investors well in advance.
What Practical Steps Should Companies Take in 2026? 🔧
Companies should immediately assess their income statement structure, identify all management-defined performance measures, evaluate system capabilities, and begin cross-functional training.
- Map your current income statement to IFRS 18 categories. Determine which of your income and expense line items fall into operating, investing, or financing categories under the new rules. Some items that were previously classified as operating may need to be reclassified.
- Inventory all MPMs used publicly. Review all investor presentations, earnings releases, annual reports, and press releases to identify every management-defined metric derived from the income statement. Each one will require an in-financial-statement disclosure and reconciliation under IFRS 18.
- Assess finance system capabilities. Determine whether your ERP and consolidation systems can capture income and expense data in IFRS 18 categories, generate the new mandatory subtotals, and support the additional note disclosures required.
- Coordinate with auditors early. IFRS 18 introduces new judgment areas — particularly in classifying certain items between operating and investing/financing — that will require auditor alignment. Engaging early prevents last-minute disagreements during year-end audit.
- Train finance and investor relations teams. IFRS 18 affects not just accounting — it changes how performance metrics are communicated publicly. Investor relations, treasury, and finance leadership all need to understand what can and cannot be presented outside the audited financial statements going forward.
Under IAS 1, “operating profit” was not defined — companies could present whatever subtotals they chose, making comparisons frustrating. Under IFRS 18, operating profit is a standardized, mandatory subtotal calculated the same way by every IFRS entity. This single change will dramatically improve comparability across industries and geographies for the first time in financial reporting history.
For official resources, visit the IFRS Foundation’s IFRS 18 official page which contains the full standard, implementation support materials, and educational webcasts.
