Philip S. "Phil" Olsen
Boston, MA
Trusted tax attorney serving Boston.
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Philip S. "Phil" Olsen is an attorney based in Boston, MASSACHUSETTS. The practice focuses on Tax. Currently practicing at Davis, Malm & D'Agostine PC.
- Based in
- Boston, MASSACHUSETTS
- Experience
- attorney
- Known for
- Tax
- Handles Tax matters from Boston, MASSACHUSETTS.
- Recognized with Best Lawyers in America — Tax Law (2026).
About Philip S. "Phil" Olsen: Philip S. "Phil" Olsen is an attorney based in Boston, MASSACHUSETTS. The practice focuses on Tax. Currently practicing at Davis, Malm & D'Agostine PC.
Areas of practice
Practice focus
Philip S. "Phil" Olsen represents clients in Boston, Massachusetts across the following areas of law. Each area links to other verified attorneys with the same focus.
Biography
About Philip S. "Phil" Olsen
Phil is a tax attorney focusing on state and local tax consulting and litigation. He has over 30 years of experience litigating and resolving major tax controversies before state supreme and appeals courts and administrative boards. While he has a solid track record of litigating cases, he has also successfully and discretely resolved hundreds of cases short of trial. His experience spans just about every area of state and local tax, including corporate income, sales and use, personal income and estate tax. Phil also represents owners and tenants in real and personal property tax valuation and exemption cases.
Before entering private practice, Phil served as a senior trial attorney and litigation supervisor for the Massachusetts Department of Revenue where he represented the Department in many landmark tax cases. This experience gives him an broad perspective when representing his clients before tax authorities.
Recent Matters Include:
- Obtained manufacturing classification for energy client resulting in annual property tax savings in excess of $1 million.
- Successfully represented numerous high-net-worth individuals who changed their domicile from Massachusetts to other states.
- Eliminated a $30 million sales and use tax assessment against a financial services company by demonstrating that the Department of Revenue’s sampling methodology was flawed.
- Successfully defended multi-national pharmaceutical, technology, media and manufacturing corporations in income, sales and property tax disputes.
- Reversed a Department of Revenue denial and obtained a $1.5 million Brownfields tax credit for a real estate development client.
- Successfully appealed a $9 million innocent spouse tax assessment.
- Negotiated local property tax agreements and litigated reductions for owners of commercial, industrial, energy and hospitality properties.
Credentials
Education
Suffolk University
J.D.
Stonehill College
BA
Jurisdictions
Bar admissions
Massachusetts, Unite
ACTIVE
Recognition
Awards & honors
Best Lawyers in America — Tax Law
2026
Best Lawyers in America — Additional Areas of Practice:
2026
Best Lawyers in America — Litigation and Controversy - Tax
2026
Best Lawyers in America — Awards:
2026
Best Lawyers in America — Boston Magazine Top Lawyers, 2025
2026
Best Lawyers in America — Massachusetts Super Lawyers, 2004, 2021-2024
2026
Best Lawyers in America — Named a Massachusetts “Go To Taxation Lawyer” by
2026
Best Lawyers in America — Massachusetts Lawyers Weekly
2026
Best Lawyers in America — , 2024
2026
Locations
Office locations
Davis, Malm & D'Agostine PC
255 State Street, 11th Floor
Boston, Massachusetts 02109
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Common questions
What areas of law does Philip S. "Phil" Olsen practice?
Philip S. "Phil" Olsen focuses on Tax.
Where is Philip S. "Phil" Olsen located?
Philip S. "Phil" Olsen primarily serves clients in Boston, Massachusetts, with an office at 255 State Street, 11th Floor.
Is Philip S. "Phil" Olsen a verified attorney?
Philip S. "Phil" Olsen's profile is listed but has not yet been claimed by the attorney. Verification status is pending.
How can I schedule a consultation with Philip S. "Phil" Olsen?
You can book a consultation through LawyersListed directly from this page. Initial outreach can also be made by phone at 617-367-2500.
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