Tax Services
Orange County, CA
Located in the heart of Irvine’s business district, Withum is one of the nation’s top-rated and largest accounting firms in Orange County.
Withum helps local corporations and nonprofits thrive, offering advisory, tax, audit, assurance and consulting services to the Orange County business community. We are more than just an Irvine accounting firm, we are a strong national resource providing all the traditional CPA and accounting services businesses and individuals require, plus a whole suite of advisory solutions to accelerate your success. That’s the Power in the Plus!
(949) 261 2808
Orange County Service Specializations
Assurance and Accounting
Employee Benefit Plan Audits
Outsourced Accounting Systems and Services
Public Company SEC Compliance & Reporting
Transaction Advisory
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 Orange County
Beyond the Region
- Inside Public Accounting Top 100 Firms – 22nd 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
Kenneth L. Johnson, CPAKen is the Partner-in-Charge (PIC) of the firm’s Orange County office. Ken brings nearly three decades of expertise in conducting audits and reviews for both privately held and publicly traded companies.
In addition to his successful career working with and advising the firm’s clients, Ken dedicates much of his time to non-client-focused activities, such as the daily operations and people strategy of the Orange County office and its growth in the local marketplace. He is passionate about mentoring the next generation and providing them with the same opportunities he had. Ken is helping the younger team members grow the firm and contribute to this office’s legacy of entrepreneurship. By acting as a business owner first, he is setting an example to the office of the advisory experience we should bring to our clients, above and beyond the compliance work of audits and tax.
Orange County Leadership
Withum in the News
Withum Champions Veteran Initiatives and Community Impact
Wreaths Across America For more than five years, Withum has been an active participant in the Wreaths Across America initiative, which is championed by the Firm’s Veterans Team Member Resource Group (TMRG) and the Not-for-Profit Services Team. Wreaths Across America (WAA), is a national nonprofit dedicated to remembering fallen service members, honoring those who serve…
Steve Talkowsky Named NJBIZ 2026 Leader in Finance
As a respected leader, Steve was recognized for his impact on the Firm’s Tax Services Team, contributing to the practice’s growth, and for his strong commitment to the mentorship and development of the teams he leads. He serves clients with global operations, advising on business taxation matters with deep expertise in Subchapter C, S corporation and partnership taxation. With a focus on making complex tax matters accessible, he is…
ROI-NJ Names Withum Leaders to Annual Power List
Pat Walsh Pat Walsh, Managing Partner and CEO, has led numerous firmwide strategic initiatives focused on best practices, client experience and technology. He leads Withum’s national growth strategy and client service initiatives, with a focus on innovation, talent development and expanding the Firm’s advisory capabilities to meet clients’ evolving needs. Pat was recognized for his…
Withum Recognized with Cigna Healthy Workforce Designation™
As a people-first organization, the Firm offers a competitive Total Rewards benefits package with unique perks for Withum team members, recognizing wellness extends beyond baseline healthcare benefits. Withum is proud to be at the forefront of exceptional benefits that support team members’ health journeys. In addition to its traditional medical, dental and vision plans, the Firm offers supplemental benefits. These include an…
Rochester Business Journal Names Withum Leaders on Accounting and Insurance 2026 Power List
Rich Wright Rich Wright is the Partner-in-Charge of Withum’s Buffalo, Rochester and Batavia offices, offering more than 30 years of public accounting experience and deep expertise in tax planning. He advises closely held businesses, high-net-worth individuals and business owners on complex tax compliance and advisory matters across multiple industries. A strategic, people-focused leader, Rich plays…
Contact Us
We will make every attempt to respond to your inquiry in a timely manner.