Misstatement Tracker
Canada

ISA 450 misstatement evaluation in Canada: CAS 450

Canada adopted ISAs through the Canadian Auditing Standards (CAS), issued by the Auditing and Assurance Standards Board (AASB, a division of CPA Canada). CAS 450 is substantively identical to ISA 450, with Canadian-specific paragraphs added where the local context requires clarification. Canadian auditors apply CAS 450 within a dual-framework environment: publicly accountable enterprises report under IFRS (as adopted in Canada), while private enterprises may choose between IFRS and Accounting Standards for Private Enterprises (ASPE). This framework choice affects the misstatement schedule because IFRS and ASPE produce different measurements for several balance sheet items, including financial instruments, employee benefits, and income taxes. An item that is a misstatement under IFRS may not be a misstatement under ASPE, and vice versa. CPAB (Canadian Public Accountability Board) oversees the audit of reporting issuers (publicly listed companies and certain other entities with public accountability). CPAB conducts annual inspections and publishes findings on audit quality, including specific observations on misstatement evaluation. For non-reporting issuers, quality assurance is handled by the provincial CPA bodies (CPA Ontario, CPA Québec, CPA British Columbia, etc.), each of which conducts its own practice inspection programme. The level of scrutiny varies by province, but the CAS requirements are consistent across Canada.

Regulatory context: Canadian Public Accountability Board (CPAB) for reporting issuers; provincial CPA bodies for non-reporting issuers

CPAB's annual inspections report has identified misstatement evaluation as a recurring area requiring improvement. In its 2023 report, CPAB found that auditors needed to improve their evaluation of the aggregate effect of uncorrected misstatements, particularly for engagements involving significant accounting estimates. Specific findings included: auditors who identified differences between their assessment and management's estimates but did not record these as misstatements on the CAS 450 schedule; insufficient consideration of whether the pattern of uncorrected misstatements indicated management bias; and projected misstatements from sampling that were calculated but then excluded from the evaluation because the auditor considered them "inherently uncertain." CPAB has emphasised that all identified misstatements, including judgmental and projected amounts, must be accumulated and evaluated under CAS 450. The fact that a misstatement involves estimation uncertainty does not exempt it from accumulation. CPAB expects auditors to apply professional judgment in determining the best estimate for each projected misstatement and to include that estimate on the schedule, with documentation of the methodology and the range of possible outcomes.

Practical guidance for Canada

Canadian practitioners auditing private enterprises under ASPE should be aware that ASPE's measurement differences from IFRS affect the misstatement analysis. Key areas include: financial instruments (ASPE Section 3856 allows cost-based measurement for many instruments that IFRS 9 requires at fair value); employee future benefits (ASPE Section 3462 differs from IAS 19 in the treatment of actuarial gains and losses); and income taxes (ASPE Section 3465 permits either the taxes payable method or the future income taxes method, while IAS 12 requires deferred tax). When the entity reports under ASPE, the misstatement schedule must reflect ASPE measurements, not IFRS measurements. For reporting issuers under IFRS, the Canadian approach to misstatement evaluation aligns with international practice. Set materiality under CAS 320 based on an appropriate benchmark, derive performance materiality and clearly trivial from overall materiality, and accumulate all misstatements above clearly trivial during the audit. At completion, evaluate the aggregate of uncorrected misstatements under CAS 450.11, considering both quantitative and qualitative factors. CPAB expects the qualitative evaluation to address at minimum: effects on compliance with debt covenants, effects on management compensation arrangements, effects on trends in reported results, and whether correction would change the entity's compliance with securities regulations.

Audit expectations

CPAB inspectors examine whether the auditor accumulated all identified misstatements (including projected amounts), performed a substantive CAS 450.11 evaluation, communicated uncorrected misstatements to those charged with governance, and documented the governance body's response. CPAB has been critical of auditors who present a summary schedule to the audit committee rather than providing the detailed itemised list required by CAS 450.12. Each uncorrected misstatement should be described individually so the audit committee can make an informed decision about correction. For non-reporting issuer audits inspected by provincial CPA bodies, the expectations are substantively the same but the inspection methodology may be less intensive. CPA Ontario's Practice Inspection programme, for example, reviews a sample of engagement files and assesses whether the misstatement schedule is complete and the evaluation is documented. Provincial inspectors are increasingly aligned with CPAB's expectations, so auditors should not assume a lower standard for private enterprise engagements.

Canada-specific considerations

Canada's bilingual legal environment (English and French) affects audit documentation in Québec and for federal entities. Financial statements of Québec entities may be in French, and the auditor's report must be in the language of the financial statements. The misstatement schedule and CAS 450.12 communication should be in the same language as the governance body's working language. The Canadian tax system creates specific misstatement considerations for private corporations. The small business deduction (available on the first C$500,000 of active business income), the Canadian-controlled private corporation (CCPC) status, and the associated corporation rules all depend on financial statement figures. An uncorrected misstatement that increases active business income above C$500,000 could cause the entity to lose the small business deduction on the excess, resulting in a tax rate increase from approximately 12% to 26% (combined federal and provincial rates vary). Communicate this threshold effect as a qualitative factor under CAS 450.11. The Canadian Securities Administrators (CSA) require reporting issuers to file annual financial statements and management's discussion and analysis (MD&A). Misstatements in the financial statements may create inconsistencies with the MD&A that the auditor must consider under CAS 720. If the MD&A discusses trends or metrics that would be affected by uncorrected misstatements, the auditor should evaluate whether the MD&A is misleading in light of those misstatements.

Common inspection findings

Differences between the auditor's assessment and management's accounting estimates were identified during audit fieldwork but not recorded as misstatements on the CAS 450 schedule.

Projected misstatements from sample testing were calculated but excluded from the aggregate CAS 450.11 evaluation on the basis that projections are inherently uncertain.

The qualitative evaluation of uncorrected misstatements did not consider effects on debt covenants, management compensation thresholds, or securities regulatory compliance.

For private enterprise audits under ASPE, the misstatement schedule applied IFRS measurement concepts rather than ASPE measurements, resulting in misstatements being over- or understated.

The CAS 450.12 communication to the audit committee presented a single aggregated figure rather than itemising each uncorrected misstatement individually.