Why is IFRS 18 being introduced?

IFRS 18 will be implemented in January 2027. But why? For years, IAS 1 has been the foundation of financial statement presentation under IFRS. It provided a principles-based framework that gave companies flexibility in how they structured their financial statements. But over time, that flexibility became part of the problem.

Investors and analysts increasingly found it challenging to compare companies. Two businesses operating in the same sector could present their income statements in very different ways. Key metrics such as “operating profit” were often defined differently, and management-defined performance measures were not always clearly reconciled to IFRS numbers.

This is the context in which IFRS 18 has been introduced.

How will IFRS 18 improve reporting?

IFRS 18 is not just an incremental update, it is effectively a replacement for IAS 1 and represents a fundamental shift in how financial performance is communicated. Its objective is simple: to bring greater consistency, transparency, and discipline to financial reporting.

At the heart of the change are three core improvements.

• Firstly, comparability. IFRS 18 introduces defined categories and mandatory subtotals within the income statement. This reduces the variability that previously existed and allows investors to compare companies across industries and geographies with ease.

• Secondly, transparency. Companies are still allowed to present management performance measures (MPMs), but they must now clearly reconcile these metrics to the closest IFRS-defined line item. This bridges the gap between internal performance reporting and external financial statements.

• Third, improved disclosures. IFRS 18 includes more structured guidance on how information should be aggregated and disaggregated in the notes. The goal is to ensure that financial statements tell a clearer, more coherent story.

The standard will apply to all IFRS reporters globally, including listed companies across the UK, EU, Australia, Canada, and many other jurisdictions. Its effective date is 1st January 2027, with early adoption permitted.

Don't Leave Your Preparations For IFRS 18 Too Late

It may sound like a long way off, but the reality is that IFRS 18 introduces changes that go beyond presentation. It affects systems, data structures, internal reporting, and even how businesses define performance.

In short, this is not a change you implement at the last minute. It is one that requires early planning and a clear understanding of how your current reporting compares to what IFRS 18 will require. In the next blog, we’ll look more closely at what is actually changing in the income statement and why those changes matter in practice.

For more information

We have a number of different resources available regarding IFRS 18, free to access.