Misstatement Tracker
Ireland

ISA 450 misstatement evaluation in Ireland: ISA (Ireland) 450

Ireland adopted ISAs through ISA (Ireland), issued by the Irish Auditing and Accounting Supervisory Authority (IAASA) in collaboration with the professional bodies (Chartered Accountants Ireland, CPA Ireland, ACCA). ISA (Ireland) 450 mirrors the international standard with some Irish-specific additions that reflect the Companies Act 2014 and the Irish regulatory framework. Most Irish entities (outside the listed sector) prepare financial statements under FRS 102 (The Financial Reporting Standard applicable in the UK and Republic of Ireland), and auditors apply ISA (Ireland) 450 within this framework. The Irish audit market includes a mix of PIE audits subject to direct IAASA inspection and non-PIE audits monitored by the professional bodies under IAASA oversight. IAASA is Ireland's audit regulator, responsible for both PIE audit inspection and oversight of the professional bodies' quality assurance programmes for non-PIE audits. IAASA publishes annual inspection findings and thematic reports that address specific aspects of audit quality, including misstatement evaluation. Ireland's relatively small market means that IAASA's findings are closely watched by the profession, and deficiencies identified on one file often trigger firm-wide remediation across the Big Four and mid-tier firms operating in Ireland.

Regulatory context: Irish Auditing and Accounting Supervisory Authority (IAASA)

IAASA's audit inspection reports have identified ISA 450 application as an area requiring improvement. Specific findings include: auditors who did not project known errors from sample testing across the untested population; ISA 450.11 evaluations that were formulaic (comparing the aggregate to materiality without qualitative analysis); and insufficient documentation of the clearly trivial threshold and its basis. IAASA has also noted cases where the communication to those charged with governance under ISA (Ireland) 450.12 did not comply with the standard's requirement to itemise each uncorrected misstatement individually. IAASA published a thematic inspection report on materiality in 2021 that included observations relevant to ISA 450. The report found that some auditors set performance materiality at a level that left insufficient headroom for expected misstatements, and that when actual misstatements exceeded performance materiality, auditors did not always reassess their audit approach as required by ISA (Ireland) 320.12. IAASA expects auditors to set performance materiality with reference to the expected level and nature of misstatements, not as a mechanical percentage of overall materiality.

Practical guidance for Ireland

Irish practitioners should align their ISA (Ireland) 450 process with IAASA's published expectations and with the practical realities of auditing FRS 102 entities. Under FRS 102, several measurement differences from full IFRS affect the misstatement schedule. Section 28 (Employee Benefits) permits a simplified approach to defined benefit pension accounting. Section 16 (Investment Property) measures investment property at fair value through profit or loss (not through OCI as sometimes permitted under IAS 40 with the fair value model). Section 12 (Other Financial Instruments) provides simplified measurement for basic financial instruments. When the entity reports under FRS 102, ensure the misstatement schedule reflects FRS 102 measurements. For the ISA (Ireland) 450.11 evaluation, address both quantitative and qualitative factors. Qualitative factors particularly relevant to Irish entities include: the effect on distributable reserves under the Companies Act 2014; the effect on the entity's compliance with the directors' duty to maintain adequate capital under Section 224; the effect on the abridged financial statements (if the entity qualifies for and uses the abridgement exemption under Section 347); and the interaction with the directors' compliance statement under Section 225 (for large companies).

Audit expectations

IAASA inspectors expect to see a complete misstatement schedule, a documented clearly trivial threshold, categorisation of misstatements by type, projected misstatements from sampling, a substantive ISA (Ireland) 450.11 evaluation, and documented communication to those charged with governance. For PIE audits, IAASA reviews the full audit file. For non-PIE audits, the professional bodies (primarily Chartered Accountants Ireland for most Irish auditors) conduct monitoring visits under IAASA oversight. IAASA has emphasised that the audit completion memorandum should cross-reference the misstatement schedule and explain how the auditor concluded that uncorrected misstatements, individually and in aggregate, were not material. A statement that "uncorrected misstatements are immaterial" without supporting analysis is insufficient.

Ireland-specific considerations

Irish company law under the Companies Act 2014 creates several ISA 450 interactions. Section 117 defines distributable profits as accumulated realised profits less accumulated realised losses. An uncorrected misstatement that overstates realised profits could cause the entity to make an unlawful distribution under Section 118. The auditor should evaluate this risk as a qualitative factor and communicate it to the directors. Section 343 of the Companies Act 2014 requires directors to prepare financial statements that give a true and fair view. The auditor's opinion under Section 391 addresses this requirement. Uncorrected misstatements that are individually or aggregately material prevent the auditor from issuing an unqualified opinion. Even below materiality, significant uncorrected misstatements that affect the true and fair view should be communicated to the directors with a clear explanation of the consequences. The Irish Revenue Commissioners' self-assessment system means that the entity's tax return is based on the financial statements. Uncorrected misstatements in the financial statements may affect the tax computation, either through direct errors in the taxable profit calculation or through timing differences that affect the deferred tax balance under FRS 102 Section 29. Calculate the tax effect of uncorrected misstatements and include it in the ISA (Ireland) 450.12 communication. Ireland's Central Bank of Ireland (CBI) regulates financial services entities and requires audited financial statements. For entities regulated by the CBI, misstatements may affect regulatory capital or solvency ratios. The auditor should consider these regulatory effects as qualitative factors under ISA (Ireland) 450.11.

Common inspection findings

Projected misstatements from audit sampling were not calculated, with only the known errors from the sample recorded on the misstatement schedule.

The ISA (Ireland) 450.11 evaluation was a single concluding sentence without analysis of qualitative factors or consideration of the cumulative effect of current and prior-year uncorrected misstatements.

The clearly trivial threshold was not documented in the audit strategy, and there was no evidence that a threshold had been applied consistently during fieldwork.

Communication to those charged with governance did not itemise individual uncorrected misstatements and did not request a specific response on each item.

The effect of uncorrected misstatements on distributable reserves under the Companies Act 2014 was not assessed, even for entities that had paid or proposed dividends.