We examine the association between permissible non-audit services provided by auditors and the timeliness of earnings announcements. Although earnings announcements are unaudited, audit progress influences management’s ability to release earnings while maintaining confidence in reported results. We posit that non-audit services generate earnings announcement timeliness benefits by improving the efficiency and timing of audits through knowledge transfer. We find that tax non-audit services are associated with timelier earnings announcements while nontax non-audit services are not. These benefits are concentrated in the pre-regulatory period before changes in the mid-2000s. Following these changes, the association persists for firms with weaker information environments, poorer performance, and greater audit-related challenges. Overall, our findings show that auditor-provided tax services are associated with enhanced timeliness of unaudited disclosures and that these benefits vary across firms and over time, highlighting previously undocumented spillovers from non-audit services with implications for academic research and regulation.

The PCAOB adopted critical audit matters (CAMs) to meet public demand for informative audit disclosure, but stakeholders are concerned this goal has not been achieved. We explore this disconnect via interviews with 30 highly experienced auditors. We find that audit firms expended considerable resources to implement CAM best practices. However, overwhelming institutional pressure gave rise to informal rules of thumb that prioritize symbolic comfort over substantive change. The first is don’t be an outlier , so auditors defer to the national office to ensure conformity and avoid PCAOB scrutiny. The second is report the “right” number of CAMs by never reporting zero and reporting at least one recurring CAM. The third is avoid surprises by communicating with the client to ensure that CAMs do not contain original information and allowing management to preempt auditor disclosures. Collectively, these rules yield CAMs that comply with PCAOB standards but do not provide new information and instead maintain the status quo.