Orange County CPA Office

18500 Von Karman Avenue,
10th Floor
Irvine, CA 92612

Phone – 949.222.2999
Fax – 949.222.2989

M-F: 8:30 AM to 5:30 PM
Saturday: Closed
Sunday: Closed


Located only 10 minutes from the shores of Newport Beach, we are proud to call our Orange County office, located in Irvine, our home base.

Our CPA firm takes pride in servicing clients of all sizes, ranging from start-ups to multi-billion dollar companies, and from all industries, such as technology, life sciences, cannabis, consumer industrial products and more. We also specialize in serving high net worth individuals.

Managing Partner Steve Milner leads the Orange County CPA office as well as Squar Milner as a whole and boasts over 200 of our 600+ employees working to meet all of your tax, audit, consulting or wealth management needs.

Squar Milner Headquarters located in Orange County | Squar Milner, CPAs: Accounting and Advisory Firm | Irvine, Orange County

Today, Squar Milner ranks among the Top 40 accounting firms in the nation and Top 5 accounting firms on the West Coast, according to Accounting Today. We are among the fastest growing CPA firms in the nation, which is a nod to our exceptional client service and dedication to providing quality services. Our success and our growth started with our Orange County personnel, and they continue to set the tone throughout the firm.

Ranked in the Top 40 Accounting Firms in the United States


  • Upon exiting the 405 Freeway, go South on Jamboree Road.
  • Turn Right onto Michelson Drive.
  • Turn Right onto Obsidian Street.
  • Left at First Stop Sign.
  • Left into Visitor Parking Lot.


You will park in the visitor parking area and take the elevator. Our Orange County CPA office is located on the 10th floor.

The receptionist will validate your parking. Please make sure you bring your parking ticket with you.

To easily locate the visitor parking area, please view our parking map.

Our Orange County Team

Squar Milner’s Orange County CPAs have extensive experience with small to large private and public companies in all areas of accounting and a wide range of industry expertise. Learn more about our Orange County Partners, Principals & Officers.



Whether you need outsourced accounting, business performance enhancement, business management, forensic or bankruptcy services, we can help.


We offer a wide range of tax strategies, consulting, and compliance services to individuals, businesses, estates and trusts.


Don’t panic. We will handle all your audit, review, attestation, and compilation needs.


Proper planning begins with an understanding of short and long-term objectives. We get to know your business needs so you’re fully protected.

If you would like to get in touch with one of our Orange County CPAs to request a proposal or ask a question, don’t hesitate to reach out!

Orange County Community Involvement Group Photo | Squar Milner, CPAs: Accounting and Advisory Firm | Irvine, Orange County


Our team at Squar Milner is dedicated to giving back to the community that has given so much to us.

Being only minutes from the coast, we have offered our services to Huntington State Beach clean ups.

We also donate our time and efforts to other organizations around Orange County, such as Second Harvest Food Bank, the Friendly Center which facilitates the distribution of food to low income families, KidWorks, and the Irvine Blood Donor Center at UC Irvine.