The PBC Problem: Administrative Drain on Audit Teams
Prepared-by-client (PBC) lists are the lifeblood of any audit engagement—and managing them is one of the most time-consuming administrative tasks in public accounting. Every audit requires a customized PBC list, ongoing follow-up with client personnel to collect outstanding items, version tracking as documents are updated, and organization of received materials into the audit file.
According to the AICPA's 2025 Private Companies Practice Section benchmarking study, audit staff at firms with under 100 professionals spend an average of 8 to 12 hours per engagement on PBC-related administrative tasks—including initial list preparation, follow-up communications, and document organization. At busy season, when teams may run 20 or more concurrent engagements, that administrative load becomes unsustainable without dedicated support.
Virtual assistants are stepping into this coordination role, managing PBC workflows so audit staff can focus on substantive testing and review.
PBC List Management: Systematic Follow-Up at Scale
The VA manages the PBC list as a living project document. At engagement kickoff, they send the initial PBC request to client personnel with clear item descriptions, format requirements, and due dates. As items arrive, they log receipt, organize files into the correct audit file folders, and update the PBC tracker in real time.
Outstanding items receive structured follow-up: a reminder at 7 days, escalation to the client finance director at 14 days, and practitioner notification when items are approaching critical path deadlines. This systematic approach eliminates the common scenario where important PBC items are informally tracked in an audit manager's email inbox and fall through the cracks during busy season.
A 2025 Center for Audit Quality (CAQ) report noted that documentation deficiencies—many of which trace to incomplete PBC collection—remained the most common finding in PCAOB inspections of smaller registered firms, affecting 34 percent of inspected engagements.
Client Document Portal Coordination
Most audit and assurance firms now use client-facing portals—ShareFile, Suralink, or Canopy—to manage document exchange. The portal itself is not self-managing: someone must set up the engagement folder structure, assign access permissions to client users, monitor upload activity, follow up when the portal sits idle, and ensure received documents meet format and completeness requirements before they reach the audit team.
Virtual assistants own this portal management function. They configure each engagement's portal workspace at kickoff, send access credentials to client personnel, monitor daily upload activity, send portal reminder communications when clients are inactive, and perform a completeness check on received documents before filing them into the audit working paper system.
This portal oversight function is often underestimated in firms that have automated their portals—the technology handles the logistics, but human oversight ensures clients actually use it and documents meet requirements.
Engagement Status Tracking: Visibility Across the Portfolio
Audit firm leadership needs real-time visibility into engagement status across the entire portfolio: which engagements are on schedule, which have outstanding PBC items threatening the timeline, and which are approaching report delivery deadlines. Without dedicated tracking, this visibility requires managers to manually poll their teams—a time-consuming process that still produces incomplete information.
Virtual assistants maintain the firm-level engagement status dashboard, updating milestone status after each engagement team check-in, flagging engagements more than five days behind their project plan, and preparing the weekly status report distributed to partners and managers. This visibility layer is particularly valuable at firms managing 30 or more concurrent audit engagements during busy season.
According to Grant Thornton's 2025 CPA Firm Operations Survey, firms with structured engagement tracking systems completed 85 percent of audits within their planned timeline, versus 61 percent for firms relying on informal tracking methods.
Scaling Audit Capacity Without Scaling Headcount
A single experienced VA can support an audit team of four to six staff members across a full busy season portfolio. Given the talent shortage in public accounting—the AICPA reported a 17 percent decline in new CPA exam candidates between 2022 and 2025—administrative leverage through VA support is increasingly a competitive necessity rather than a luxury.
Audit and assurance firms looking to increase engagement capacity and reduce administrative burden should explore Stealth Agents' virtual assistant services.
Sources
- AICPA Private Companies Practice Section, Engagement Administration Benchmarking Study, 2025
- Center for Audit Quality (CAQ), PCAOB Inspection Findings Summary, 2025
- Grant Thornton, CPA Firm Operations Survey, 2025
- AICPA, CPA Pipeline and Exam Candidate Trends, 2025