EXPERT ACCOUNTING FOR YOUR BUSINESS'S FINANCIAL HEALTH.

WE'RE THE TRUSTED PARTNER FOR SMALL TO MID-SIZED BUSINESSES SEEKING RELIABLE BOOKKEEPING, PAYROLL, AND TAX SERVICES.

Founder & CEO of Argus CPA

ABOUT JOHN MAO

John Mao, founder of Argus CPA in Walnut Creek, has built more than a bookkeeping and tax firm—he’s built a reputation for integrity, precision, and unwavering dedication to his clients’ financial well-being. With over 28 years of experience advising corporations, organizations across diverse sectors, private families, and individual clients, John combines deep technical expertise with a personal, people-first approach. His defining qualities—character, integrity, and steadfast commitment—have earned him the trust of individuals and businesses throughout the Bay Area and beyond.

WHAT WE DO

At Argus CPA, we partner with small and mid-sized businesses to provide comprehensive financial services that streamline operations and drive growth. We focus on giving you peace of mind so you can focus on your business.

✅ Bookkeeping: We provide meticulous and timely bookkeeping to ensure your financial records are always accurate and up-to-date.

✅ Part-Time Controller: Receive high-level financial guidance without the cost of a full-time employee.

✅ Tax Services: Navigate complex business taxes with our expert tax planning and preparation services, ensuring compliance and maximizing your deductions.

✅ Consulting Services: From setting up new accounting systems to optimizing your financial processes, we provide the expert guidance you need to thrive.

VIEW ALL SERVICES

FAQ

Find answers to common questions about our services and process.

  • Argus CPA is shifting its focus to serve primarily small and mid-sized businesses and corporations looking for CPA services.

  • John Mao has over 28 years of experience providing accounting services in the Bay Area. He is known for his integrity, precision, and dedication to his clients' financial health.

  • Argus CPA offers a range of services, including bookkeeping, part-time controller services, payroll, tax services, and consulting

  • John Mao is described as having a "people-first approach" and being meticulously detailed and careful in his work. He is also noted for his responsiveness and for bringing a sense of peace to his clients

  • The website will include a contact form that sends submissions directly to John Mao's email address.