ABSTRACT Using proprietary data from a global accounting firm, we investigate the determinants of auditors' interim effort as well as the impact of interim effort on audit quality, client disclosure timeliness, audit hours, and audit fees. Public statements from accounting firms and regulators suggest various benefits from accelerating auditor effort, but these claims remain largely untested. We find that interim effort is higher for large, complex clients that require integrated audits of both financial statements and internal control over financial reporting. With respect to consequences, we find that allocating relatively more work to the interim period is associated with a reduced likelihood of late 10‐K filings, decreased total audit hours, and higher fees. Although increasing interim period effort is not, on average, associated with a reduced likelihood of misstatement, we do find that current period material weaknesses are less likely with greater interim work. Thus, greater interim effort appears to facilitate the remediation of internal control deficiencies before year‐end. We also show that the benefits of increased interim period effort allocation are much stronger—including improved audit quality—when manager and partner interim involvement is high. Overall, our study provides important new insights on audit production and highlights benefits of reduced hours for auditors, earlier identification of control deficiencies for clients, and more timely financial reports for investors.

ABSTRACT We examine whether PCAOB inspection reports increase auditors' litigation risk. We find that inspection reports with audit deficiencies are positively associated with the number of lawsuits subsequently filed against the inspected auditor. These results are strongest when client-level lawsuit-triggering events have already occurred and when PCAOB inspection content is arguably more persuasive. Importantly, these results pertain exclusively to triennially inspected audit firms for which the set of other publicly available signals of audit quality is limited. Furthermore, we do not argue that inspection reports in isolation trigger lawsuits. Instead, once events such as restatement announcements or bankruptcies create the potential for legal action against the auditor, inspection reports provide a public signal about past noncompliance with auditing standards. This signal likely increases lawyers' perceived strength of case against the auditor before the lawsuit is filed and before lawyers have access to the audit workpapers.