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Marshall Dean Sage

Marshall Dean Sage

Tax Law and Business Consulting
  • Business Law, Tax Law, Bankruptcy
  • California
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Biography

As managing partner of Sage Law Firm, Dean delivers comprehensive counsel with a focus on tax controversy, business consulting, and nonprofit matters. With his extensive experience, Dean offers clients tailored tax and business solutions to address their unique needs. Dean is dedicated to guiding clients throughout their business journey, from entity formation to dissolution, ensuring they are positioned for success at every stage.

Dean’s proficiency in resolving tax matters spans a broad spectrum as he has worked with both individuals and corporate clients. He routinely represents clients before the IRS and state taxation agencies and has counseled clients in sales tax matters nationwide.

Dean provides strategic counsel to business of all sizes, collaboating with clients to develop customized strategies for success. His meticulous contract drafting safeguards his clients’ interests and ensures favorable transactions. Whether negotiating profit-sharing arrangements, refining licensing agreements, or revising purchase and sale contracts, Dean leverages his contractual experience to deliver creative solutions to complex business challenges.

Passionate about charitable entities and their missions, Dean has assisted dozens of nonprofit founders through entity formation, structural organization, and the drafting of internal policies. He helps clients navigate the complex exempt application process and provides comprehensive compliance guidance to maintain good standing.

Dean graduated with honors from UCLA, studying Communications and English Literature. Furthering his education, he earned a Master of Entrepreneurship degree, with honorable distinction, from the University of Otago in Dunedin, New Zealand. Dean braved the midwestern winters to complete his J.D. at the University of Michigan Law School, and later returned to his native San Diego to earn an LL.M. in taxation from the University of San Diego.

Practice Areas
Business Law
Business Contracts, Business Dissolution, Business Finance, Business Formation, Business Litigation, Mergers & Acquisitions, Partnership & Shareholder Disputes
Tax Law
Business Taxes, Income Taxes, International Taxes, Payroll Taxes, Property Taxes, Sales Taxes, Tax Appeals, Tax Audits, Tax Planning
Bankruptcy
Chapter 11 Bankruptcy, Chapter 7 Bankruptcy
Additional Practice Area
  • Nonprofit Law
Video Conferencing
  • FaceTime
  • Google Meet
  • Zoom
  • GoToMeeting
  • Microsoft Teams
  • RingCentral
  • WhatsApp
Fees
  • Free Consultation
    We proudly offer potential clients a free 20-minute consultation to evaluate if the Sage Law Firm team is a good fit to assist you with your tax or business needs.
  • Credit Cards Accepted
  • Rates, Retainers and Additional Information
    We accept payment via credit card, debit card, ACH transfers, PayPal, and Venmo.
Jurisdictions Admitted to Practice
California
State Bar of California
ID Number: 269325
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Languages
  • English: Spoken, Written
Professional Experience
Managing Partner
Sage Law Firm
- Current
As managing partner of Sage Law Firm, Dean delivers comprehensive counsel with a focus on tax controversy, business consulting, and nonprofit matters. With his extensive experience, Dean offers clients tailored tax and business solutions to address their unique needs. Dean has worked with both individuals and corporate clients. He routinely represents clients before the IRS and state taxation agencies and has counseled clients in sales tax matters nationwide.
Education
University of Michigan Law School
University of Michigan Law School Logo
Awards
Best of the Bar
San Diego Business Journal
Best New Attorneys
The Recorder, Tax Section
Big Brother of the Year
Big Brothers Big SIsters of Washtenaw County
Richard A. Scholarship for Academic Achievement
University of San Diego
Honorable Distinction
University of Otago, Dunedin, New Zealand
Provosts Honors, College Honors
University of California, Los Angeles
Professional Associations
San Diego County Bar Association
Member
- Current
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Tom Homann LGBT Law Association
Member
- Current
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California State Bar  # 269325
Member
- Current
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Myotonic Dystrophy Foundation
Ambassador
- Current
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Publications
Articles & Publications
Nostalgic Brickyard Mingles Good Coffee, Tea, and People
San Diego Community News Group
Speaking Engagements
Speaker, Myotonic Dystrophy Foundation Conference, San Diego
Myotonic Dystrophy Foundation
Presenter, Rare Disease Day, San Diego, CA
Locana Pharmaceuticals
Panelist, Myotonic Dystrophy Foundation Conference, Washington, D.C.
Myotonic Dystrophy Conference
Presenter, Rare Disease Day, San Diego
Ionis Pharmaceuticals
Certifications
LL.M. in Taxation
University of San Diego School of Law
Websites & Blogs
Website
Sage Law Firm
Social Media
Contact & Map
Sage Law Firm
3919 30th St, Ste 105
3919 30th St, Ste 105
San Diego, CA 92104
Telephone: (619) 880-6444
Fax: (619) 828-6425
Monday: 8 AM - 5 PM
Tuesday: 8 AM - 5 PM (Today)
Wednesday: 8 AM - 5 PM
Thursday: 8 AM - 5 PM
Friday: 8 AM - 5 PM
Saturday: Closed
Sunday: Closed
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