Greater Philadelphia's Largest Accounting Firms Employ Over 10,000

The 42 biggest CPA firms in the region span Pennsylvania, New Jersey, and Delaware

Published on Feb. 12, 2026

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The 42 largest accounting and CPA firms in Greater Philadelphia employ more than 10,000 local professional staff across the region, according to the latest research from the Philadelphia Business Journal. This online ranking expands on the print edition, identifying 59 additional accounting offices in the area.

Why it matters

The Philadelphia Business Journal's annual list of the region's top accounting firms provides insight into the strength and diversity of the professional services industry in Greater Philadelphia, which is a key economic driver for the metro area.

The details

The list includes firms with a minimum of 15 local professional staff across Philadelphia, Delaware, Montgomery, Bucks, and Chester counties in Pennsylvania; Camden, Burlington, and Gloucester counties in New Jersey; and Kent and New Castle counties in Delaware. The rankings are based on total employment, including client-billable personnel as of November 1, 2025, but excluding sales, marketing, finance, HR, administrative, and practice-support staff.

  • The list was published on February 12, 2026.
  • The employment data is current as of November 1, 2025.

The players

Philadelphia Business Journal

A leading business news publication covering the Greater Philadelphia region.

Todd Romero

Data Reporter at the Philadelphia Business Journal.

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What they’re saying

“This week's List continues a shift in our research methodology and philosophy, one that emphasizes more data and context for readers while better coordinating the resources available to us and our 40-plus sister publications under the American City Business Journals flag.”

— Todd Romero, Data Reporter (Philadelphia Business Journal)

The takeaway

The Philadelphia region's robust accounting industry, with over 10,000 professionals employed at the top 42 firms, underscores the area's strength as a hub for professional services and a key driver of the local economy.