401(k) Audit Firms in California

Last updated · Source data: plan year 2024 Form 5500 filings

Who audits the most 401(k) plans in California?

Baker Tilly US, LLP audited 867 California plans in plan year 2024, the most of any firm. Overall, 759 firms audited 8,081 plans sponsored in California; the median audited plan had 331 participants.

Most active in California

Baker Tilly US, LLP

867California plans audited

Top audit firms for California plans

Top 25 firms shown. Counts are retirement plan filings (401(k), 403(b), profit-sharing, and pension) whose sponsor address is in California.

Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.

California plan audit market at a glance

California employee benefit plan audits, plan year 2024
MeasureValue
Audited plans sponsored in California8,081
Audit firms with at least one CA engagement759
Median audited plan size (participants)331
Share of all U.S. audited plans10.4%

Choosing an audit firm in California

Engagement volume is the most objective public signal of employee benefit plan audit experience: the Department of Labor’s audit quality study found deficiency rates of 76% among CPAs performing one or two plan audits a year, versus 12% at the largest practices. The table above shows which firms do this work in California at real volume.

Beyond volume, ask candidate firms about AICPA Employee Benefit Plan Audit Quality Center membership, who staffs the fieldwork, experience with your recordkeeper and payroll systems, and whether the fee assumes an ERISA Section 103(a)(3)(C) election. A California address is not required — plan audits are performed remotely under the same national standards — but local presence can simplify scheduling and walkthroughs.