Boston, MA

Located in the heart of Boston’s Seaport District, Withum is one of the nation’s top 25 accounting and advisory firms.

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Withum Plus Boston

Our team of experienced professionals offers tailored solutions across a wide range of industries. We’ll help you through every stage, ensure you have a sustainable business plan and can navigate your growth. We help clients take on today’s complex business landscape by leveraging a technology-forward approach…plus a whole suite of advisory solutions that will level up your success. That’s the Power in the Plus!

Boston Service Specializations

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Massachusetts State and Local Tax Updates

Do you or your organization operate in multiple states? Do you own property in a variety of states? Massachusetts State and Local Tax (SALT) laws are always changing and understanding the nuances of the states that you own or operate in is challenging. In these Massachusetts resources, you’ll find just a dash of the most up-to-date details on rules and regulations as state and local tax changes happen by state!

Massachusetts SALT Updates

Beyond the Region

  • Inside Public Accounting Top 100 Firms – 23rd Largest Nationally
  • Accounting Today Top 100 Firms – 22nd Largest Nationally
  • Great Place to Work® – Fortune Best Workplaces for Parents and Women
  • Vault Top 25 Accounting Firm
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Certified Place to Work 2025-2026
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Partner In Charge

Leonard M. Smith, CPA, MSA

Lenny is the partner-in-charge of the Withum’s Seaport office in Boston, MA and Woburn office, bringing over 20 years of expertise in public accounting. As the leader of the Life Science Tax Practice, he specializes in corporate and pass-through taxation, guiding clients through complex financial strategies and tax opportunities. His expertise covers R&D tax credits, Qualified Small Business Stock benefits, M&A transactions, Section 382 limitations, transfer pricing, and equity-based compensation. Additionally, Lenny has a deep understanding of business succession planning and tax controversy, ensuring his clients receive forward-thinking solutions and sound guidance.

Boston Leadership

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Partner
Boston, MA
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Partner
Boston, MA

Withum Boston in the News

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business strategy, nuts and bolts
The Many Essential Ways in Which An M&A Tax Practitioner Contributes to a Successful Transaction

There are various types of tax professionals who practice in the M&A space. An obvious one is a tax lawyer who can weave both tax and non-tax issues together to produce a tax-efficient transaction. That skill, no doubt, is invaluable, in as much as weaving together even a couple provisions, let alone scores, of the…

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