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California Audit, Tax and Consulting

A strong history serving California

With offices throughout California–including San Francisco, San Jose, Los Angeles, Irvine and San Diego–RSM has an expansive presence in the state that continues to be one of the major international hubs of innovation and business leadership. We serve more than 2,000 businesses in all major industries–many with a global presence. Our client base continues to grow as does our commitment to professional development of our skilled workforce. We take pride in our diversity–both within our employee base and the clients that we serve.

Commitment to the community

Our commitment to California extends beyond serving the needs of our clients. Our personnel devote their time, money and efforts to many local charitable organizations, fundraisers and events. For example, in 2015 RSM raised approximately $70,000 to benefit a variety of charities in California through the firm’s Birdies Fore Love program as a part of the 2015 RSM Classic.

Employment opportunities

For information about the employment opportunities currently available in California, please visit the Careers section of our site.

California Insights

California contractor's purchase of steel taxable at time of sale

California Office of Tax Appeals determined that a construction company could not use a resale certificate for material purchases.

California enacts net operating loss and credit limits due to COVID-19

Fiscal year 2021 budget includes temporary tax changes in order to generate much needed revenue in the COVID-19 economy.

California Office of Tax Appeals denies research credit refund

The Office of Tax Appeals determined that the taxpayer did not show that it undertook a process of experimentation.

California cash grants for employee training and job retention

California-based employers have limited window to submit requests for cash grants from COVID-19 related employee training program.

Middle market relief for businesses impacted by the coronavirus

Widespread availability of credits and economic incentives during the COVID-19 pandemic may help businesses increase cash flow.

California's new privacy law set to shake up business

The California Consumer Privacy Act is changing the way businesses collect, process and retain information on customers.

California enacts budget with selective conformity to the TCJA

The California fiscal year 2020 budget addresses TCJA conformity and other new and amended state tax provisions.

California enacts changes to recent remote seller provisions

California amends the effective date for district remote seller nexus requirements; offers penalty relief for certain marketplace sellers.

California enacts $500,000 remote seller nexus threshold

New threshold replaces previous guidance adopting lower sales and transaction thresholds; legislation adopts marketplace provider nexus.

San Francisco business tax developments to review for 2019

New and increased San Francisco gross receipts taxes take effect in 2019; economic nexus standard of $500,000 adopted.

California Office Locations

Orange County
18401 Von Karman Ave.
Fifth Floor
Irvine, CA 92612
949.255.6500

Paul Short, Irvine office leader


Los Angeles
515 South Flower St.
17th Floor
Los Angeles, CA 90071
213.330.4800

Joe Mazza, Los Angeles office leader


San Diego
3430 Carmel Mountain Road
Suite 200
San Diego, CA 92121
619.281.7764

Jerry Varga, San Diego office leader

Sam Mascareno, West market leader


San Francisco
44 Montgomery St.
Suite 3900
San Francisco, CA 94104
415.848.5300

Tim Tiefenthaler, San Francisco office leader


Silicon Valley
333 W San Carlos St
Suite 700
San Jose, CA 95110
408.572.4440


Careers in California

Search open positions in California, or learn more about working at RSM.

Still a student? Learn more about our Internships.


California Events

2019 Middle Market Economic Update

RSM’s chief economist will update on macroeconomic market trends, trends in the Bay Area and expected changes in the environment.

  • September 26, 2019

Meet RSM at the 2019 IIA International Conference

RSM is a proud sponsor of the Institute of Internal Auditor 2019 International Conference at the Anaheim Convention Center in Anaheim, CA.

  • July 07, 2019

2018 Middle Market Economic Update—San Diego

RSM’s chief economist, Joe Brusuelas, will discuss macroeconomic market trends and expected changes in the financial environment.

  • October 25, 2018

RSM and Microsoft's 2018 Middle Market Economic Outlook

Joe Brusuelas will provide a keynote speech on macroeconomic market trends, trends in the Bay Area and expected changes in the environment.

  • September 26, 2018