tomkins-family_medTomkins Tax Consultants has been serving the City of Lucerne and the County of Lake since 1974, providing personalized help for your financial needs.


We work with you on a personal level to determine the best solutions for your unique needs, then leverage our seasoned expertise to achieve the best possible results.


We are your trusted partner in success. Our firm is large enough to offer a full range of professional services at a fair price, but small enough to give you the individual attention that you deserve.


Rest assured that when a need arises, our firm is ready and capable to handle everything for you so you can focus on what matters most to you.

Staff Profiles

 John H Tomkins, EA, CFPjohn-tomkins_med

John H. Tomkins, EA, CFP graduated from Scotia High School in up-state New York; graduated from Syracuse University in 1960 with a business degree. The adults in our family decided to raise our children in a rural setting.

In 1974 I purchased a tax and bookkeeping practice in Lucerne, California. While serving the tax and bookkeeping needs in Lake County, the three girls graduated from Upper Lake schools.

Community service runs parallel to business service and here are a few things of interest. My first was as President of the Upper Lake Farm Center which was part of the California Farm Bureau; 24 years as Trustee of the Upper Lake High School District; Lifetime accounting credential with Mendocino-Lake Community College District teaching tax and accounting; currently serving as Trustee of Mendocino College; member of North Shore Business Association and President on several occasions; currently member of Lake Family Resource Center Board of Directors; Board Member of Sutter Lakeside Hospital serving as Chair of Finance Committee and also Vice-President until changeover and now on the Sutter Lakeside Advisory Committee; Member of Lake County Chamber of Commerce; Member of the SPCA Board.

John Tomkins is a member of the National Association of Enrolled Agents and the California Society of Enrolled Agents.

diane-planteDiane T Plante, CPA

Diane Tomkins Plante, CPA – I graduated high school from Upper Lake and college from California State University, Sacramento. I earned a license as a registered dental assistant and used that to work my way through college. I’ve been practicing accounting and bookkeeping since 1995 and completed my licensing requirements for Certified Public Accounting in 2000. My history includes 3 years in private accounting and over 6 years auditing experience with another accounting firm. I’ve worked with my father since 1995 as a tax preparer and consultant, and now full-time in this capacity. My community service includes the board of directors for Hospice Services of Lake County and Good Shepherd Ecumenical Academy, in addition to volunteer duties on the Upper Lake High School Bond Measure for the new facilities. My family and I have decided to live in Lake County for the beauty, business opportunities and friendships here. I look forward to serving you.

Diane is a member of California Society of Certified Public Accountants and National Association of Enrolled Agents.