Key Points
- IAS and IFRS are equally binding; one does not override the other based on numbering alone.
- 25 IAS standards remain in force (as of 2025), alongside 18 IFRS standards issued since 2001.
- Use "IAS" when applying a standard originally issued by the IASC; use "IFRS" when applying a standard issued by the IASB.
- Misidentifying the governing standard in a working paper triggers review notes that waste time and erode file quality.
Side-by-side comparison
| Dimension | IAS (International Accounting Standards) | IFRS (International Financial Reporting Standards) |
|---|---|---|
| Issuing body | IASC (1973-2001) | IASB (2001-present) |
| Active standards in force | 25 standards (IAS 1 through IAS 41, with several withdrawn or superseded) | 18 standards (IFRS 1 through IFRS 18, with IFRS 18 effective from 2027) |
| Amendment process | Amended by the IASB through the same due process used for IFRS standards | Issued and amended by the IASB through exposure drafts and public consultation |
| When a new standard replaces an old one | The IASB issues a new IFRS and withdraws the IAS (e.g., IFRS 16 replaced IAS 17, IFRS 18 replaces IAS 1) | Not applicable; an IFRS is superseded by another IFRS |
| Interpretation bodies | SIC Interpretations (now part of IFRIC legacy) | IFRIC Interpretations |
| Legal authority in the EU | Endorsed through EC Regulation 1126/2008 identically to IFRS | Same endorsement mechanism; no distinction in legal status |
Decision rule: Cite IAS when the standard's number falls in the IAS series (IAS 1 through IAS 41) and IFRS when it falls in the IFRS series (IFRS 1 through IFRS 18). The label follows the standard, not the engagement.
What is IFRS vs IAS: Why Two Sets of Standards Exist?
The distinction looks trivial on paper but surfaces in two places during file preparation. The first is the accounting policies note. When a client's financial statements reference "IFRS" generically without specifying IAS 16 for property, plant and equipment or IAS 37 for provisions, the engagement team needs to evaluate whether the note meets the disclosure requirement in IAS 8 paragraph 28(a), which requires disclosure of the specific accounting policies applied. A vague reference to "IFRS" without the standard number is not a policy disclosure.
The second place is the working paper itself. Auditors who cite "IFRS 16" when the relevant standard is IAS 16 create confusion in review. IAS 16 governs property, plant and equipment; IFRS 16 governs leases. The paragraph numbers are entirely different. A cross-reference error like this, once flagged by a reviewer, requires rework of every linked working paper.
Worked example: Fernandez Distribucion S.L.
Client: Spanish wholesale distribution company, FY2025, revenue EUR 34M, IFRS reporter. The engagement team is mapping the applicable standards for the first-year audit file. Fernandez holds EUR 9.2M of inventory, EUR 4.1M of property and equipment, EUR 1.8M in right-of-use assets, and a EUR 2.5M provision for an ongoing environmental remediation obligation.
Step 1 — Identify the IAS standards
Inventory is measured under IAS 2 at the lower of cost and net realisable value (IAS 2.9). Property, plant and equipment falls under IAS 16, with depreciation policies per IAS 16.50. The environmental provision is recognised under IAS 37 paragraphs 14-26 and measured at the best estimate of the expenditure required.
Documentation note: record each balance sheet line, the IAS standard applied, and the key measurement paragraph. Cross-reference to the client's accounting policy note per IAS 8.28(a).
Step 2 — Identify the IFRS standards
The right-of-use assets fall under IFRS 16 paragraphs 23-46 for initial measurement. Revenue recognition follows IFRS 15 because Fernandez acts as a principal in distribution contracts (IFRS 15.B34-B38). First-time application of any new or amended standard follows the transition provisions in each standard, not IFRS 1 (which applies only on first-time adoption of IFRS as a whole).
Documentation note: record the IFRS standard, the relevant paragraphs, and confirm that the client's accounting policy note separately identifies each IFRS standard applied. Do not merge IAS and IFRS references into a single generic "IFRS" citation.
Step 3 — Cross-check the accounting policies note
Fernandez's draft note states "the financial statements comply with IFRS as adopted by the EU." The engagement team verifies that the note also identifies IAS 2, IAS 16, IAS 37, IFRS 15, and IFRS 16 as the specific policies applied to the material balance sheet lines. A generic statement alone does not satisfy IAS 8.28(a).
Documentation note: record the specific comparison between the policies listed in the note and the standards identified in steps 1 and 2. Flag any gap where a material standard is not mentioned.
Conclusion: if the team had cited "IFRS 2" for inventory instead of IAS 2 (IFRS 2 governs share-based payment), the entire inventory testing section would reference the wrong standard, and the reviewer would send the file back for correction before sign-off.
Why it matters in practice
- Teams cite "IFRS" as a blanket reference in working papers without specifying the individual standard number. Quality reviewers flag this because the file must demonstrate that the auditor identified which standard applies to each assertion tested. ISA 230.8(a) requires documentation sufficient to enable an experienced auditor to understand the nature and extent of procedures performed.
- Engagement teams confuse IAS 16 (property, plant and equipment) with IFRS 16 (leases) in the fixed asset lead schedule. The numbering coincidence produces cross-reference errors that cascade into the disclosure checklist, where paragraph numbers from the wrong standard appear alongside the correct balance.
Related terms
Frequently asked questions
Will the IASB eventually replace all IAS standards with IFRS standards?
The IASB replaces an IAS standard only when a full-scope project produces a new IFRS. There is no programme to renumber the remaining IAS standards. IFRS 16 replaced IAS 17 in 2019, and IFRS 18 replaces IAS 1 with an effective date of 1 January 2027 (IAS 8.54A). Each replacement follows its own project timeline.
Do IAS and IFRS standards have the same legal force in the EU?
Yes. EC Regulation 1126/2008 endorses both IAS and IFRS standards identically. An endorsed IAS standard has the same legal status as an endorsed IFRS standard. There is no hierarchy that makes one set of standards subordinate to the other within the EU endorsement framework.
How do I cite IAS vs IFRS in audit documentation?
Cite the standard by its full designation and paragraph number (for example, IAS 37.14 or IFRS 15.35). ISA 230.8(a) requires documentation that enables an experienced auditor to understand the procedures performed. A generic reference to "IFRS" without the specific standard number does not meet this threshold.