Trusted Tax & Accounting Expert
Clear guidance. Strong advocacy. Confident financial decisions
Trusted Tax & Accounting Expert
Clear guidance. Strong advocacy. Confident financial decisions
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Clear guidance. Strong advocacy. Confident financial decisions
Clear guidance. Strong advocacy. Confident financial decisions
At Contra Costa CPA, we deliver tax and accounting solutions tailored to individuals and businesses—backed by deep IRS insight and decades of real-world experience. Whether you need year-round advisory support, audit defense, or help resolving tax debt.
Our mission is to deliver outstanding tax and accounting solutions uniquely tailored to individuals and businesses. We empower clients with clear knowledge and steadfast support so they can confidently reach their financial objectives.
About Contra Costa CPA
Contra Costa CPA is a sole proprietorship accounting firm led by Luis Enrique Ramirez, M.S.T., C.P.A. With over 28 years of professional experience in accounting and taxation, Luis brings a rare combination of technical expertise and IRS insider perspective to every engagement.
About Luis Enrique Ramirez, M.S.T., C.P.A.
Luis is a former IRS Revenue Agent with extensive experience in examinations and collections. Over the course of his IRS career, he handled more than 1,500 tax examinations and collection casesacross South Florida and Northern California. He also served as an IRS Class Instructor, traveling nationwide to teach taxation to newly appointed Revenue Agents.
Luis defended government positions in Administrative Appeals, collaborated with IRS attorneys in Tax Court proceedings and criminal investigations, and helped recover millions of dollars for the U.S. Government through enforcement actions such as levies, liens, and asset seizures.
Today, Luis uses that experience to help clients navigate tax challenges with clarity and confidence—specializing in tax audit defense, tax debt resolution, and advisory services for both individual and business clients.

When you’re facing IRS or state tax action, you need a calm, experienced advocate who understands how the system works—from the inside. We help clients respond strategically, protect their rights, and pursue the best possible outcome.
Services include:

Good tax decisions start long before filing season. We provide year-round guidance to help individuals and businesses make informed decisions, reduce risk, and plan for what’s next.
Services include:
2950 Buskirk Ave ste 300, Walnut Creek, California, USA
Open today | 09:00 am – 05:00 pm |

Contra Costa CPA
2950 Buskirk Ave, Ste 300 | Walnut Creek, CA
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