Assurance. Tax. Wealth. Serving Silicon Valley for more than 40 years, Johanson & Yau provides personal service to solve the unique needs of our clients. We work with high net worth individuals, families, and businesses across a number of diverse industries, including real estate and construction, technology, non-profit, healthcare, professional services, manufacturing, wholesale and distribution. Our services include assurance, accounting and auditing, tax planning and compliance, business consulting, and wealth management.