Case Study: T.D. Williamson achieves company-wide compliance and saves auditors' time with AppZen Expense Audit

How T.D. Williamson improved auditing efficiency with AppZen Expense Audit

T.D. Williamson, a century-old pipeline services company, faced a fragmented, highly manual expense auditing process that left its three-person audit team with limited visibility and inconsistent policy enforcement. To achieve company-wide compliance, auto-approve low-risk spend, and gain real-time insights without disrupting workflows, T.D. Williamson implemented AppZen’s Expense Audit alongside their existing expense system.

AppZen’s AI reviewed every expense report, flagged only high‑risk lines for manual review, and enforced consistent policies across teams. The result: T.D. Williamson now processes 9,000 expense reports with just three auditors, reached a 65% auto-approval rate, saved 100+ hours in three months, and significantly reduced manual reviews—freeing auditors to focus on cost savings and improving employee spending behavior. AppZen’s solution also delivered real-time feedback and deeper spend visibility to drive ongoing compliance.

T.D. Williamson

Andrew Aguirre

Corporate Treasurer