Trusted guidance. Clear direction.

Atherton & Associates partners with businesses and individuals who want clarity—not complexity—when it comes to financial decisions. Our role is to help you think ahead, manage risk, and move forward with confidence, knowing you have experienced professionals guiding the way.

Tax

Our role is to be your partner in business. We plan and prepare taxes for corporations, partnerships, individuals and not for profit organizations. Let our tax professionals help you achieve your financial, tax and strategic goals.

Assurance

The foundation of our accounting practice is built on quality audited, reviewed and compiled financial statements. Important decisions about your business should depend on accurate financial information.

Client Accounting Services (CAS)

Our CAS team provides reliable, day-to-day accounting support so you can focus on growing your business. From bookkeeping to fractional CFO and controller services, we help streamline operations and deliver the financial clarity you need to move forward with confidence.

Consulting

Our consulting services can help you optimize processes and resources to be more efficient and productive. From strategy and operations, to management consulting and transactions, our advisors can help take your company to the next level.

SINCE

1925

Trusted guidance through every stage of life and business.

ABOUT US

A Foundation of Experience

Long-term prosperity doesn’t come from quick answers. It comes from experience, judgment, and consistency. That foundation helps our clients move forward with confidence through every stage of growth and change.

Careers & Opportunities

Commitment to Professional Growth

Atherton is committed to provide our professionals the opportunity to grow into our next generation of leaders. Our unique support system emphasizes professional development to ensure individual career objectives are achieved.

We pride ourselves on growing organically and find success in developing and retaining talented professionals. However, we are always looking to add experienced professionals to our Atherton team.

Are you interested in joining our team?

News & Resources

Around the Industry

Understanding Assurance Services: How Audits and Reviews Build Trust for California Businesses

Assurance services play a critical role in helping businesses strengthen financial transparency, improve credibility, and build stakeholder trust. For companies across California—particularly in construction, agriculture, and nonprofit sectors—independent CPA assurance services provide the confidence that financial information is accurate, compliant, and decision-ready.

Through audits, reviews, and agreed-upon procedures, assurance services deliver objective insight into financial reporting and internal processes. This not only supports access to capital and regulatory compliance but also positions organizations for long-term growth and stronger relationships with lenders, investors, and boards.

May 26, 2026

Filed an extension? How to use the time between now and October 15th

Filing a tax extension buys you time, but only if you use it wisely. From revisiting your April payment estimate to gathering missing documents and staying on top of current-year obligations, the months between now and October 15th are a valuable planning window. Read on to learn how to make the most of your extension and avoid a costly repeat of the same tax challenges next year.

May 21, 2026

Internal Controls for Businesses in California: How Assurance Services Strengthen Financial Integrity

Strong internal controls are essential for businesses looking to protect financial integrity, reduce fraud risk, and ensure accurate reporting. For companies across California—including those in construction, agriculture, and nonprofit sectors—effective internal control systems are critical to managing operational complexity and maintaining compliance.

Through CPA-led assurance services, businesses gain an independent evaluation of their internal controls, including risk assessment, control testing, and practical recommendations. A well-structured internal control framework not only strengthens compliance but also supports long-term growth and builds confidence with stakeholders, lenders, and boards.

May 19, 2026