IFRS 18 Presentation and Disclosure in Financial Statements: From Understanding to Implementation — The Accountant’s Roadmap to 2027

Awareness Series | Practical Implementation Guide for Accountant

The Standard Is Clear. Is Your Reporting System Ready?

After exploring the major changes introduced by IFRS 18, the question for accountants is no longer simply what does the new Standard require?

The real challenge is not understanding the requirements themselves, but determining how they will be reflected in our financial statements and embedded within our accounting tools, software systems, data flows, controls, and reporting processes.

IFRS 18, Presentation and Disclosure in Financial Statements, replaces IAS 1 and becomes effective for annual reporting periods beginning on or after 1 January 2027, with earlier application permitted.

For entities reporting on a calendar-year basis, this means the first mandatory annual financial statements under IFRS 18 will generally cover 2027, with 2026 comparative information presented under the new requirements.

Although IFRS 18 does not fundamentally change the recognition and measurement of most transactions, its implementation extends beyond changing the format of the Statement of Profit or Loss.

It affects classification, reporting mappings, subtotals, management performance measures, note disclosures, cash flow reporting, comparative information and internal controls.

The accountant’s challenge is therefore not simply to adopt a new financial statement template, but to build a reporting process capable of producing IFRS 18-compliant information consistently.

Where Should Accountants Begin?

Accountants should understand how IFRS 18 affects the entity’s existing financial reporting framework.

Before changing the chart of accounts or financial statement templates, accountants should assess the nature of the entity’s activities, its current reporting structure and the information available from its accounting systems.

IAS 1 vs IFRS 18 — The Implementation Shift

Accountant Focus: Start with a gap assessment, not with a redesigned financial statement.

The Accountant’s IFRS 18 Implementation Roadmap

A structured implementation process can be organized into ten steps.

These steps are interconnected. A change in classification may affect the Statement of Profit or Loss, cash flow reporting, note disclosures, comparative information and reporting controls.

Step 1 — Assess the Entity’s Activities and Reporting Requirements

IFRS 18 introduces specific classification requirements that may differ depending on the entity’s main business activities.

For example, entities that invest in assets or provide financing to customers as a main business activity may classify certain income and expenses differently from other entities.

Accountants should therefore establish:

• The entity’s main business activities.
• The nature of its significant income and expense streams.
• Existing financial statement classifications and subtotals.
• The availability of information needed for IFRS 18 reporting.
• The areas requiring accounting judgments or system changes.

Expected deliverable: A documented IFRS 18 impact assessment identifying the reporting areas affected and the changes required.

Accountant Focus

Do not automatically apply the same classification model to a manufacturing company, investment entity and financial institution. The entity’s activities must be assessed before determining the appropriate presentation.

Step 2 — Review the Chart of Accounts and Reporting Mappings

One of the most important implementation activities is reviewing how general ledger accounts feed into the financial statements.

IFRS 18 introduces five categories of income and expenses in the Statement of Profit or Loss:

Operating, Investing, Financing, Income Taxes and Discontinued Operations.

However, the existing chart of accounts may not distinguish between these categories.

Practical Example — Mapping Exercise

The mapping should not rely solely on account names. Accountants must consider the underlying transactions and applicable IFRS 18 requirements.

Accountant Focus

A full redesign of the chart of accounts is not always necessary. In some cases, an updated reporting mapping, additional account attributes or a reporting layer may be sufficient.

Expected deliverable: An IFRS 18 classification matrix linking general ledger accounts to financial statement categories and line items.

Step 3 — Redesign the Statement of Profit or Loss

Once classification is established, accountants can redesign the Statement of Profit or Loss.

The new presentation must incorporate the required categories and defined subtotals.

Two important subtotals are:

Operating Profit or Loss: Income and expenses classified in the operating category.

Profit or Loss Before Financing and Income Taxes: A defined subtotal generally required, subject to specified exceptions.

Illustrative Presentation

Illustration assumes an entity without specified main business activities and no discontinued operations.

Accountant Focus

The new subtotals should not simply reproduce management’s existing definitions of operating profit or financing costs.

They must be calculated according to IFRS 18’s classification requirements.

Expected deliverable: A revised Statement of Profit or Loss template supported by documented classification rules.

Step 4 — Identify Management-Defined Performance Measures

IFRS 18 introduces specific note disclosures for qualifying Management-Defined Performance Measures (MPMs).

Accountants should review performance measures communicated publicly outside the financial statements, including those used in investor presentations, earnings announcements and other public communications.

The assessment should determine whether each measure meets the IFRS 18 definition of an MPM.

Practical Example

Management reports:

• Operating Profit: $5 million
• Restructuring Adjustment: $1 million
• Adjusted Operating Profit: $6 million

If Adjusted Operating Profit qualifies as an MPM, IFRS 18 requires the applicable disclosures, including a reconciliation to the most directly comparable IFRS subtotal or total and other prescribed information.

Accountant Focus

The MPM assessment requires coordination with management, investor relations and other teams responsible for public performance communications.

Expected deliverable: An MPM register, documented qualification assessments and disclosure schedules.

Step 5 — Reassess Aggregation, Disaggregation and Materiality

IFRS 18 strengthens the principles governing the grouping, separation, location and description of financial information.

Accountants should review broad captions such as:

• Other Income and Other Expenses
• Administrative Expenses
• Other Assets and Other Liabilities
• Miscellaneous Income or Costs

The objective is to determine whether material information is appropriately presented in the primary statements or explained in the notes.

Practical Example

An entity reports Other Operating Expenses of $10 million, comprising:

Depending on the facts and materiality assessment, the entity may need to separately present certain items or provide appropriate disaggregation in the notes.

Accountant Focus

IFRS 18 does not require every item to be disclosed separately. It requires accountants to determine the appropriate level of detail without obscuring material information.

Expected deliverable: A documented aggregation and disaggregation assessment supporting the revised financial statement presentation.

Step 6 — Update the Statement of Cash Flows

IFRS 18 introduces consequential amendments to IAS 7 that affect cash flow reporting.

For entities applying the indirect method, operating cash flow reconciliation starts with IFRS 18 operating profit or loss.

The classification alternatives for interest and dividend cash flows are also reduced.

For entities without specified main business activities:

Different requirements apply to entities with specified main business activities.

Accountant Focus

Review both the cash flow preparation template and the underlying reporting mappings. Changes to profit or loss presentation and cash flow classification should be coordinated.

Expected deliverable: Updated IAS 7 cash flow schedules and reporting procedures.

Step 7 — Review the Remaining Financial Statements and Notes

Although IFRS 18 introduces its most visible changes in the Statement of Profit or Loss, implementation should cover the complete financial statement package.

Accountants should review:

• The Statement of Financial Position.
• The Statement of Changes in Equity.
• The Statement of Cash Flows.
• Accounting policy disclosures.
• Primary statement line-item descriptions.
• Notes, reconciliations and cross-references.

IFRS 18 explicitly defines complementary roles for primary financial statements and notes.

Primary statements provide useful structured summaries. Notes provide material information necessary to understand and supplement those summaries.

Accountant Focus

The objective is not necessarily to increase the number of disclosures, but to improve the location, structure and clarity of information.

Expected deliverable: An updated financial statement package with consistent presentation, descriptions and note references.

Step 8 — Prepare Comparative Information and Transition Reconciliations

IFRS 18 is applied retrospectively in accordance with its transition requirements.

For a calendar-year entity adopting IFRS 18 in 2027, the 2026 comparative Statement of Profit or Loss will generally need to be presented using IFRS 18 classifications.

The Standard also requires specific transition reconciliations.

Practical Implementation Timeline

For entities reporting interim financial statements under IAS 34, additional first-year transition requirements must also be considered.

Accountant Focus

Do not wait until the 2027 year-end closing process to begin preparing comparative information.

Expected deliverable: A documented comparative restatement and reconciliation file supporting the first IFRS 18 reporting period.

Step 9 — Update Accounting Systems and Internal Controls

IFRS 18 implementation is not solely an accounting policy exercise.

It may require changes to financial reporting systems, consolidation packages, general ledger mappings, financial statement templates and management reporting processes.

Accountants should consider whether existing systems can:

• Classify transactions correctly under IFRS 18.
• Produce the required subtotals.
• Support MPM reconciliations.
• Generate comparative reporting information.
• Maintain consistent mappings across financial statements and notes.
• Provide sufficient documentation and audit trails.

Accountant Focus

System changes should be supported by appropriate controls, including mapping approvals, reconciliation procedures, review responsibilities and change management.

Expected deliverable: Updated reporting configurations, documented procedures and tested internal controls.

Step 10 — Test, Train and Validate Readiness

Before the first reporting period, accountants should perform a trial preparation exercise using IFRS 18 reporting requirements.

This exercise should test the complete reporting process, from general ledger extraction to final financial statement presentation.

A useful approach is to prepare a parallel IFRS 18 reporting package using an existing reporting period.

This can help identify classification inconsistencies, missing information, mapping errors and disclosure gaps before mandatory application.

Training should extend beyond the financial reporting team to personnel responsible for transaction classification, consolidation, management reporting and financial statement review.

Accountant Focus

Implementation is complete only when the entity can produce accurate and consistent IFRS 18 reporting information through a documented, repeatable process.

Expected deliverable: A validated IFRS 18 reporting package, documented review findings and formal implementation sign-off.

IFRS 18 Readiness — The Accountant’s Final Checklist

Before concluding the implementation exercise, confirm that:

• The entity’s main business activities have been assessed.
• All material income and expense streams have been classified.
• The chart of accounts or reporting mappings have been updated.
• Required IFRS 18 subtotals have been correctly calculated.
• Qualifying MPMs have been identified and disclosure schedules prepared.
• Aggregation and disaggregation have been reassessed.
• Cash flow reporting has been updated.
• Financial statement titles, labels and notes have been reviewed.
• Comparative information and transition reconciliations have been prepared.
• Systems and internal controls have been tested.
• Preparers and reviewers have received appropriate training.
• A complete IFRS 18 reporting package has been reviewed and approved.

Closing Perspective — From Compliance to Reporting Readiness

IFRS 18 implementation should not be viewed as a last-minute financial statement formatting exercise.

Its requirements affect the way financial information is classified, summarized, reconciled and communicated.

The most effective approach is to begin with an impact assessment, establish reliable reporting mappings, redesign the relevant statements and disclosures, prepare comparative information, and test the entire reporting process before mandatory adoption.

As the 2027 effective date approaches, the question is no longer whether IFRS 18 will change financial reporting. The real challenge is determining how those changes will be embedded in financial statements, accounting software, ERP systems, reporting tools, and underlying processes. For accountants, the objective is not merely to achieve compliance once, but to build a sustainable reporting framework and technology environment capable of delivering IFRS 18-compliant information consistently, accurately, and at scale.