About Diaz-Christians Accountancy Corporation

Some relationships are measured in years.

Ours are often measured in generations.

For decades, families and business owners throughout California have trusted Diaz-Christians Accountancy Corporation to help them navigate financial decisions, changing tax laws, business growth, and life's major transitions.

What began in the 1980s under the leadership of Osvaldo Diaz-Christians Sr. continues today with the same philosophy that built the firm from the beginning:

Take care of people. Build trust. Think long term.

Today, that legacy continues under CPA Osvaldo Diaz-Christians Jr., whose more than 25 years of tax experience help guide clients through increasingly complex financial decisions while maintaining the personal service that has always defined the firm.

Accounting Is About More Than Compliance

Most people think of accounting as something that happens after the fact. A tax return gets filed.

Financial statements are prepared. Reports are completed. We believe the most valuable accounting relationships happen before those moments.

That's why our focus extends beyond preparation and compliance. We help clients understand the implications of today's decisions on tomorrow's opportunities.

Whether someone is launching a business, expanding operations, navigating an IRS issue, or planning for future generations, our goal is to provide guidance that supports both present needs and long-term objectives.

Serving Businesses and Families Through Every Stage

Our services include:

  • Tax Preparation & Planning

  • Small Business Accounting

  • Business Consulting

  • New Business Formation

  • Strategic Business Planning

  • QuickBooks Services

  • IRS Tax Problem Resolution

  • Estate & Trust Tax Services

  • Financial Statement Preparation

  • Audit Assistance

Many clients initially come to us for one service.

Over time, the relationship naturally expands as their lives, businesses, and financial needs evolve.

Relationships Built to Last

One of the things we're most proud of isn't found on a tax return.

It's the number of clients who continue working with us year after year—and the families who continue working with us generation after generation.

That continuity is possible because of the people behind the firm.

Many members of our team have spent much of their careers here. Clients often work with familiar faces for years, creating a level of consistency that is increasingly rare.

We believe trust is earned through reliability, communication, and doing what's best for clients over the long term.

A better way for you to do business.
Our services are designed specifically for business start-ups, entrepreneurs and small businesses of all sizes. Let’s start the conversation.