PCAOB AS 2501 inspections: what valuation specialists are flagging this audit cycle
PCAOB inspections of audits of investment fund clients have been quietly producing a steady stream of comments on the auditor’s valuation procedures under AS 2501 (Auditing Accounting Estimates, Including Fair Value Measurements). The comments are not addressed to us — they go to the audit firm. But because we sit downstream of those audit firms in our day-to-day work, the comment pattern is visible to us, and it is worth describing what is showing up.
Three patterns we are seeing this cycle.
1. Comparable-set documentation, not just selection.
In prior cycles, the question was usually “why these comparables?”. In 2025–2026 we are seeing more comments asking “why not these comparables?” — that is, what was screened out, on what criteria, and where did the screen-out criteria themselves come from. This is a shift from outcome-documentation to process-documentation, and a comparable-set memo that does not contain an explicit screen-out audit trail is now likely to draw a follow-up.
2. Consistency-with-management challenges.
AS 2501 requires the auditor to evaluate whether management’s estimate is reasonable in the circumstances. We are seeing more comments on whether the auditor adequately challenged management’s projections — particularly where the projection underlying a DCF differs materially from the GP’s own investment committee memos written at deal entry, or where it diverges from comparable-company growth trajectories without articulated rationale. The remedy is a management-estimate-overlay reconciliation that explicitly addresses these gaps.
3. Specialist independence — including the firm’s own.
Where the auditor used the firm’s own valuation specialist group, comments have asked the audit team to demonstrate that the specialist’s involvement was genuinely independent of the engagement team — not just on paper. This is a recurring theme in inspections of integrated firms, and it is one of the structural reasons LP advisory committees continue to ask for an outside-the-firm independent valuator on transactions where independence-in-appearance matters.
What this means for our workpaper file.
Three things have moved permanently into the standard deliverable, in our view: (a) an explicit screen-out memo on the comparable set, (b) a management-estimate-overlay reconciliation, and (c) a clear audit-trail of the internal review, with reviewer independence demonstrable on the file itself. None of these are exotic; all of them are now table stakes.
