Australian accounting standards are undergoing a major shift as AASB 18 replaces AASB 101, fundamentally altering how your profit and loss (P&L) statement is structured and audited. From reporting periods beginning on or after 1 January 2027, Australian entities must reclassify P&L items into five defined categories—operating, investing, financing, income taxes, and discontinued operations—and disclose Management-defined Performance Measures (MPMs). This guide provides a practical checklist to update your chart of accounts and ERP systems ahead of the 2026 comparative year.

At a Glance: Core AASB 18 P&L Changes for Australian Businesses

The Core Shift

AASB 18 (Presentation and Disclosure in Financial Statements) is Australia's new accounting standard that officially supersedes AASB 101. It introduces mandatory, defined categories into the P&L statement to eliminate inconsistent reporting practices and to standardise the presentation of operating profit across Australian entities.

Mandatory Commencement Date

The standard applies to annual reporting periods beginning on or after 1 January 2027. Because it requires retrospective application, finance teams must also prepare comparative financial statements for the 2026 reporting period under the new rules.

The 5 P&L Categories

AASB 18 structures the P&L statement across five defined categories: Operating, Investing, Financing, Income Taxes, and Discontinued Operations. All operating and financial items must now be meticulously reclassified into the core Operating, Investing, or Financing categories.

Mandatory Operating Profit and Financing Subtotals

For the first time, standardised subtotals—specifically "Operating Profit" and "Profit or Loss Before Financing and Income Taxes"—are compulsory for all reporting entities. This requirement restricts how non-operating items are displayed and provides users with a consistent baseline measure of performance from core operations.

Audited Management Performance Measures (MPMs)

Alternative performance measures used in public communications — such as adjusted EBITDA or underlying profit — are now formally regulated under the new standard. These Management-defined Performance Measures (MPMs) must be explicitly disclosed within the audited financial statement notes, accompanied by a clear reconciliation linking them to the closest relevant AASB-required subtotal.

What's Changing in Your P&L Structure — Pre- vs Post-AASB 18

Issued to maintain direct alignment with IFRS 18, AASB 18 addresses a long-standing challenge in financial reporting: inconsistent calculations of "operating profit". Under the previous standard, AASB 101, entities possessed broad discretion in how they defined, calculated, and presented operating performance, often employing custom formulas for intermediate subtotals. This lack of uniformity made direct financial comparisons across Australian entities difficult for investors, lenders, and analysts, while leaving room for "cherry-picked" performance metrics that could mask underlying operating realities.

AASB 18 replaces this fragmented approach with an auditable, standardised framework. By establishing precise, mandatory definitions for categories of income and expense, the standard ensures that operating profit is calculated consistently across all reporting entities.

Detailed Breakdown — Pre-AASB 18 vs Post-AASB 18 P&L Structure

To assist finance functions in navigating the transition, the core structural changes between AASB 101 and AASB 18 are detailed in the comparative breakdown below:

5 Actionable Steps to Prepare Your Chart of Accounts and ERP Systems for AASB 18 Compliance

Transitioning to AASB 18 requires finance functions to look beyond reporting mechanics and make structural adjustments to underlying general ledgers, financial consolidation systems, and corporate governance. Finance teams should execute the following five-step implementation plan.

1. Conduct a Chart of Accounts (CoA) Impact Assessment
   Perform a line-by-line audit of your entire general ledger, mapping every existing revenue and expense account to the five defined AASB 18 P&L categories. Pay close attention to items historically aggregated under general administration or finance overheads—such as foreign exchange gains and losses, interest income, or investment returns—and assign them according to your entity's specified main business activities.
   
   

2. Review and Identify Corporate MPMs
   Audit all non-GAAP and alternative performance measures currently used in external communications, including investor presentations, market announcements, directors' reports, and board packs. Determine which measures meet the definition of Management-defined Performance Measures (MPMs). Establish formal internal governance to document how each MPM is calculated, why it provides useful information, and how it reconciles to the most directly comparable AASB-required subtotal.
   
   

3. Re-engineer ERP and Accounting Systems
   Update account hierarchies, consolidation rules, and reporting templates across enterprise systems—such as SAP, Oracle, TechnologyOne, NetSuite, or Xero—to support the new five-category P&L structure. System logic must be configured to automatically group accounts into mandatory subtotals and facilitate dual-reporting during the transition phase. Where functional expense presentation is chosen on the face of the P&L, system tagging must also be enabled to capture and report expenses by nature for note disclosures.
   
   

4. Prepare 2026 Comparative Data
   Because AASB 18 requires full retrospective application, entities must restate their 2026 financial results under the new standard to serve as compliant comparative figures in 2027 reports. Reclassify comparative transactions early in the transition timeline—covering FY27 for June balance-date entities (first reporting in FY28) or CY26 for December balance-date entities—to identify data gaps, validate mapping rules, and prevent bottlenecks ahead of official reporting.
   
   

5. Engage External Auditors for Early Review
   Present your proposed Chart of Accounts reclassification, expense classification methodologies (nature vs function), and draft MPM reconciliation notes to your external auditors well ahead of the FY27 year-end audit. Early audit engagement validates technical interpretations before systems are locked, reducing the risk of material adjustments or reporting delays during formal sign-off.
   
   

AASB 18 Implementation FAQ: Guidance for SMEs and Reporting Entities

Q: Does AASB 18 apply to small and medium enterprises (SMEs) or only listed entities?

AASB 18 applies to all Australian entities required to prepare General Purpose Financial Statements (GPFS). This includes Tier 1 entities (publicly accountable entities, such as ASX-listed companies) and Tier 2 entities (unlisted commercial entities or mid-tier SMEs preparing Tier 2 Simplified Disclosures under AASB 1060).

For for-profit entities, compliance becomes legally mandatory for financial years commencing on or after 1 January 2027. Note that the Australian Accounting Standards Board (AASB) has formally granted a deferral for not-for-profit (NFP) and superannuation entities, extending their effective date to annual reporting periods beginning on or after 1 January 2028. Entities preparing Special Purpose Financial Statements (SPFS)—where legally permissible—are not directly captured, though any voluntary transition to GPFS will require full compliance with AASB 18.

Q: How does AASB 18 impact foreign exchange gains and losses?

Under previous practices, foreign exchange (FX) gains and losses were frequently aggregated into finance expenses or buried within general administration overheads. AASB 18 mandates a strict "look-through" approach: FX differences must be classified within the same P&L category as the underlying transaction or exposure that generated them.

For example, FX gains or losses arising from operational trading—such as foreign currency trade payables or trade receivables—must be categorised within Operating. Conversely, exchange differences generated from foreign currency debt facilities belong in Financing, while FX movements on foreign-denominated investment assets belong in Investing. If tracking FX differences to individual transactions involves undue cost or effort, entities are required to classify those affected foreign exchange differences in the Operating category, rather than defaulting to financing.

Q: Can we still report Adjusted EBITDA under AASB 18?

Yes, companies can continue to use alternative performance metrics such as Adjusted EBITDA, Underlying EBIT, or Normalised Net Profit. However, if these metrics are communicated publicly outside the primary financial statements—such as in investor presentations, market announcements, or directors' reports—they will likely fall under the formal definition of Management-defined Performance Measures (MPMs).

Where a measure qualifies as an MPM, AASB 18 requires it to be disclosed in a single, dedicated note within the audited financial statements. This note must include a detailed reconciliation back to the most directly comparable AASB-defined subtotal (such as Operating Profit), accompanied by explanations of why management believes the measure provides useful information, alongside the tax and non-controlling interest (NCI) effects for each adjusting item.

Conclusion: Preparing Your Business for 1 January 2027

AASB 18 represents the most significant overhaul of financial statement presentation in two decades. Beyond a simple reformatting exercise, it fundamentally reshapes how Australian businesses report core operational performance, governs executive performance commentary, and demands deeper integration between general ledgers and financial reporting systems.

By evaluating your chart of accounts, re-engineering ERP consolidation rules, and engaging external auditors early, your finance team can ensure a seamless transition—maintaining full audit compliance and operational clarity well before the mandatory 1 January 2027 deadline.

Official sources:

• AASB — Australian Accounting Standard AASB 18: Presentation and Disclosure in Financial Statements

• AASB — Australian Accounting Standard AASB 101: Presentation of Financial Statements

• KPMG — AASB 18 Presentation and Disclosure in Financial Statements