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

California will tax many SaaS and software sales starting in 2027

California’s SB 122 will broadly apply sales and use tax to pre-written software and SaaS transactions beginning January 1, 2027, affecting both sellers and buyers. Businesses could face new obligations to collect, report, or directly remit tax on software purchases they don’t pay tax on today. Here’s what you need to know to start preparing before the rules take effect.

October 12, 2026

New IRS per diem rates in effect as of October 1

The IRS has released its 2026-2027 special per diem rates for business travel, and the changes took effect October 1st. If your company reimburses employees for travel expenses, now is the time to update your rates, review your reimbursement policy, and ensure your expense systems reflect the latest IRS guidance before outdated rates create compliance problems. Read our latest article to learn what changed, what it means for your business, and what your finance team should do right now.

October 6, 2026

Q4 tax planning: what needs to happen, and when?

Q4 tax planning is not a single deadline; it’s a series of decisions that each have their own timing. Some strategies require lead time to execute, others depend on an updated year-end forecast, and some work can legitimately carry into the new year. Knowing which category each decision falls into is what separates effective fourth quarter planning from a last-minute scramble in December.

October 6, 2026