Tax Services
Los Angeles, CA
Located in the heart of the San Fernando Valley, Withum is one of the nation’s largest accounting and advisory firms.
We offer advisory, tax and assurance services to a wide range of industries in the Los Angeles business community. Our professionals create strategies to minimize tax exposure, streamline business processes and guide companies through transactions.
(818) 789 1179
Los Angeles Service Specializations
Assurance and Accounting
Employee Benefit Plan Audits
Advisory
Audit Services
CA State and Local Tax Updates
Do you or your organization operate in multiple states? Do you own property in a variety of states? California State and Local Tax (SALT) laws are always changing and understanding the nuances of the states that you own or operate in is challenging. In these California resources, you’ll find just a dash of the most up-to-date details on rules and regulations as state and local tax changes happen by state!
Industries We Focus on in Los Angeles
Our seasoned professionals possess the industry expertise our clients need to grow and succeed. We offer insights and experience to keep you informed and to help you achieve your financial goals.
Beyond the Region
- Inside Public Accounting Top 100 Firms – 23rd Largest Nationally
- Accounting Today Top 100 Firms – 22nd Largest Nationally
- Great Place to Work® – Fortune Best Workplaces for Parents and Women
- Vault Top 25 Accounting Firm
Partner In Charge
Christopher Passmore, CPA, MBAChris Passmore is a partner with over 20 years of experience in public and private accounting and also serves as the partner-in-charge of the Firm’s Los Angeles office. He specializes in assurance and business consulting services to emerging and middle-market companies. While Chris services a wide variety of clients, he has developed a reputation as an expert in working with technology companies, professional service firms, franchised businesses, and benefit plans.
He spent several years working with publicly and privately held businesses while working at a Big Four firm. Chris understands the accounting firm and client sides of running a business, having served as a corporate controller for a publicly held manufacturing company. As part of the Master’s program, Chris attended the prestigious Global Enterprise Management Program at Oxford University in the United Kingdom. Chris is a member of a small group of CPAs who hold an advanced-level certificate for audits of 401(k) plans. This credential was established by the Employee Benefit Plans Audit Quality Center of the AICPA to distinguish those service providers committed to the employee benefit plan industry and adherence to DOL and IRS requirements.
Los Angeles Leadership
Withum in the News
Sameer Uddin Named to Caseware’s 2026 30 Under 30
Advancing Audit Innovation Sameer has played a key role in advancing Withum’s use of audit technology, helping teams adopt new methodologies, improve efficiency and enhance consistency across engagements. A trusted resource for technology implementation, he has been instrumental in the Firm’s adoption of Caseware Cloud and Dynamic Assurance Solutions (DAS) applications. Driving Firmwide DAS Adoption…
Withum Team Members Named as INNOVATE100 Honorees
Leading Industry with a Tech–Forward Vision Matt Walsh, partner and practice leader of Withum’s Industrial and Consumer Products Services Team, was honored in the Finance/Accounting category for helping modernize the Firm’s technology ecosystem. His leadership has supported initiatives that enhance efficiency, streamline workflows and better align technology with evolving client needs, including work with Caseware…
Alan Iosue Named 2026 LA Times Entertainment Business Visionary
As a trusted advisor to entertainment clients, Alan helps organizations navigate the unique opportunities and complexities of an increasingly dynamic, deadline-driven industry. This recognition reflects his commitment to delivering strategic guidance that supports both immediate business needs and long-term success across Southern California’s creative economy. Alan advises production companies, professional athletes, arts organizations and closely…
Withum Ranked a Top 20 Firm Among 2026 IPA 100 Firms
The annual IPA 500 ranks the 500 largest accounting firms in the United States by net revenue using data submitted through the IPA Practice Management Survey. A Growth Strategy Guided by The Withum Way Withum’s rise into the Top 20 reflects purposeful investment. As an independent, owner-operated firm, Withum has the flexibility to make long-term investments that support sustainable growth while maintaining its culture and deepening client relationships. Innovation…
Robin Kim Joins Withum Capital as Managing Director of Investment Banking
Robin brings more than 20 years of investment banking and principal investing experience, advising founder-led, family-owned and privately held companies. Throughout his career, he has advised on transactions exceeding $30 billion in aggregate value, including M&A transactions, leveraged buyouts, recapitalizations, restructurings and debt and equity financings. His experience spans a broad range of industries, providing…
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