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Thorn Law Group

Open Hours:

Monday, 9:00 AM - 5:00 PM
Tuesday, 9:00 AM - 5:00 PM
Wednesday, 9:00 AM - 5:00 PM
Thursday, 9:00 AM - 5:00 PM
Friday, 9:00 AM - 5:00 PM
Saturday, Closed
Sunday, Closed

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Introduce

For individuals and businesses in Washington, DC, facing complex tax issues, the stakes can be incredibly high. Dealing with the Internal Revenue Service (IRS), the Department of Justice (DOJ), or state taxing authorities requires not only a deep understanding of intricate tax laws but also strategic advocacy and a unique insight into government procedures. This is precisely where Thorn Law Group distinguishes itself as a leading tax law firm in the nation's capital. With a team that includes former IRS attorneys and a managing partner renowned for his expertise, Thorn Law Group offers unparalleled legal representation for a wide array of civil and criminal tax controversies.

Thorn Law Group has built a formidable reputation as a highly specialized and results-oriented tax law firm. Led by Managing Partner Kevin E. Thorn, who is widely recognized as a preeminent tax law professional, the firm provides sophisticated tax counsel and aggressive legal representation. What truly sets Thorn Law Group apart is its team's extensive experience from within government agencies, including the IRS and the U.S. Tax Court. This insider knowledge provides a significant strategic advantage, enabling them to navigate complex procedures, anticipate government tactics, and develop highly effective defense strategies. They are committed to resolving even the most sensitive and complicated tax matters as efficiently and favorably as possible, consistently striving to minimize penalties and exposure for their clients. Their client base is diverse, ranging from individuals and high-net-worth individuals to partnerships, trusts, closely-held businesses, accounting firms, and corporations, both domestically and internationally.

Location and Accessibility

The Washington, DC office of Thorn Law Group is strategically located in the heart of the city's central business district, providing convenient access to federal government offices and courts. Their address is: 1775 I St NW suite 1150, Washington, DC 20006, USA.

This prime K Street location offers excellent accessibility for clients throughout the District and the surrounding metropolitan area. The office is within a very short walking distance of several major Metro stations, including Farragut West (Orange, Blue, and Silver Lines) and Farragut North (Red Line). These stations connect directly to various parts of Washington, DC, as well as the Maryland and Virginia suburbs, making it incredibly convenient for commuters. Numerous Metrobus routes also operate along I Street NW and the surrounding avenues, offering additional public transportation options. For those arriving by car, there are multiple commercial parking garages available in the vicinity, though it's always advisable to plan for potential traffic and parking availability in this busy downtown area. The firm's central location underscores its dedication to serving clients who require immediate and direct access to top-tier legal expertise in federal tax matters.

Services Offered

Thorn Law Group specializes exclusively in tax law, offering a comprehensive suite of services to address virtually any civil or criminal tax controversy. Their expertise spans national and international tax issues, including:

  • IRS Audit Defense: Representing individuals and businesses during all stages of IRS audits, from initial examination to administrative appeals and litigation, seeking to reduce or eliminate proposed tax deficiencies and penalties.
  • Criminal Tax Investigations & Defense: Providing aggressive defense for clients facing criminal tax allegations, including tax evasion, tax fraud, unfiled tax returns, and other white-collar tax crimes. This includes representation during Department of Justice investigations.
  • International Tax Law: Advising clients on complex international tax issues, including Foreign Account Tax Compliance Act (FATCA) compliance, foreign bank account reporting (FBAR), and tax implications of international business operations and investments.
  • Offshore Bank Accounts & Voluntary Disclosure: Guiding clients through IRS voluntary disclosure programs for previously undisclosed offshore bank accounts and foreign assets, aiming to mitigate penalties and avoid criminal prosecution.
  • Tax Litigation: Representing clients in disputes before various judicial bodies, including the U.S. Tax Court, U.S. District Courts, and the U.S. Court of Federal Claims.
  • State Tax Controversies: Handling disputes with state taxing authorities across the nation, including state income taxes, sales and use taxes, payroll taxes, and inheritance taxes.
  • Collection Alternatives: Negotiating with the IRS and state taxing authorities for collection alternatives such as Offer in Compromise, Installment Agreements, and Penalty Abatement.
  • Business Tax Law: Assisting businesses with payroll tax issues, trust fund recovery penalties, worker classification disputes, and other corporate tax matters.
  • IRS Whistleblower Program: Representing individuals who wish to report tax fraud and potentially receive a reward under the IRS Whistleblower Program.
  • IRS Office of Professional Responsibility (OPR) Investigations: Defending tax preparers, attorneys, and other tax professionals against investigations and enforcement actions by the IRS OPR.
  • Cryptocurrency Taxes: Providing guidance and representation for clients navigating the complex tax implications of virtual currency transactions.
  • ERC Fraud & PPP Loan Investigations: Defending individuals and companies under investigation for Employee Retention Credit (ERC) fraud and Paycheck Protection Program (PPP) loan fraud.
Features / Highlights

Thorn Law Group is distinguished by several key features and highlights that make it a formidable and highly effective choice for tax-related legal challenges in Washington, DC:

  • Former IRS Attorneys: A significant strength of the firm is that many of its attorneys, including Managing Partner Kevin E. Thorn, are former IRS lawyers. This insider perspective provides invaluable insight into how the IRS operates, investigates, and prosecutes cases, offering clients a strategic advantage. Kevin E. Thorn was notably a Senior OPR Enforcement Attorney and Acting Chief of Enforcement for IRS Office of Professional Responsibility, a unique background that is highly beneficial for clients facing OPR investigations.
  • Specialized Expertise in Complex Tax Issues: The firm’s exclusive focus on tax law, particularly complex civil and criminal tax controversies, means they possess a deep and current understanding of even the most obscure tax regulations and government procedures.
  • Proven Track Record of Success: Client testimonials frequently highlight the firm's ability to achieve significant reductions in IRS penalties and liabilities, often saving clients substantial amounts of money and preventing severe consequences, including criminal prosecution. Case results mentioned include saving clients millions of dollars in penalties and taxes.
  • Global Reach with Local Presence: While serving clients nationwide and globally on international tax issues, their Washington, DC office provides a crucial local point of contact with direct access to federal tax agencies and courts.
  • Confidentiality and Responsiveness: The firm emphasizes confidentiality and prides itself on being responsive to clients' needs, providing personal attention throughout sensitive and often stressful tax matters.
  • Thought Leadership: Kevin E. Thorn is a frequent lecturer and author on tax law and government procedures, demonstrating his commitment to staying at the forefront of the field and educating the broader community.
Promotions or Special Offers

As a highly specialized and reputable law firm operating in the complex field of tax law, Thorn Law Group does not typically offer traditional "promotions" or "special offers" in the consumer sense. Their value lies in their unparalleled expertise, strategic insights, and the ability to achieve favorable outcomes in high-stakes tax controversies. However, like most professional legal service providers, Thorn Law Group is committed to providing an initial consultation to prospective clients. This confidential discussion is a critical opportunity for individuals and businesses to explain their specific tax situation, receive a preliminary assessment from experienced tax attorneys, understand potential legal strategies, and learn about the firm's approach and fee structures. This initial meeting allows clients to gauge the firm's capabilities and determine how their specialized services can best address the client's unique tax challenges. Those interested in leveraging the expertise of Thorn Law Group are encouraged to contact their Washington, DC office directly to schedule this consultation.

Contact Information

To connect with Thorn Law Group for confidential inquiries or to discuss your tax-related legal needs, please use the following contact details:

  • Address: 1775 I St NW suite 1150, Washington, DC 20006, USA
  • Phone: (202) 349-4033
  • Mobile Phone: +1 202-349-4033

For the most current information, including firm updates, specific practice area details, or to schedule a consultation, it is always recommended to visit the official Thorn Law Group website or call their Washington, DC office directly.

Conclusion: Why this place is suitable for locals

For individuals and businesses within the District of Columbia, Thorn Law Group stands out as an exceptionally suitable and vital legal resource when facing challenging tax issues. Given DC's status as a federal hub, many residents and businesses here frequently encounter complex tax regulations, audits, and international tax considerations. Having a law firm right in their backyard with a team of former IRS attorneys, including a managing partner with direct experience in IRS enforcement, provides a unique and significant advantage.

The firm's localized presence means convenient access for consultations and meetings, but their expertise extends nationally and internationally, covering the full spectrum of civil and criminal tax controversies. Whether it’s navigating a daunting IRS audit, disclosing offshore accounts, or defending against serious criminal tax allegations, Thorn Law Group offers the specialized knowledge, strategic insight, and aggressive advocacy that DC locals need. Their proven track record of saving clients substantial amounts and successfully resolving complex tax disputes underscores their value. For anyone in Washington, DC, seeking to resolve a sensitive or complicated tax matter with professionalism and discretion, Thorn Law Group offers a premier local solution with a global reach.

Location & Map

1775 I St NW suite 1150, Washington, DC 20006, USA

Customer Reviews

(10 reviews)

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Barsha Shrestha
Jun 11, 2025

By far, the most efficient Washington DC tax attorney in the area. Thorn Law Group saved my company a substantial amount, lowering the IRS penalties and fees we supposedly owed, to almost zero. Managing Partner Kevin E. Thorn found various critical errors the IRS had made during their tax audit investigation into my company. Choose the most thorough tax law legal representation in DC, choose Thorn Law Group.

R
Remy T
Aug 21, 2023

Thorn Law Group is best firm in the area and highly specialized in their craft. Kevin Thorn has many years of experience in the tax legal industry and providing exceptional service. Thank you for the valuable advice and the hard work you've done.

Y
Young Wang
Feb 02, 2024

Thorn Law Group exceeded my expectations for my IRS tax audit. Their professionalism provided a sense of security for me with dealing with the Audit. I'll consistently turn to them for legal counsel, appreciating the justified and transparent costs for their exceptional service.

D
Domenico Zuniga
Oct 15, 2024

Thorn law group delivered top-notch legal services. The staff was attentive, communicative, and efficient throughout the process. They made a stressful situation much easier to handle. I couldn’t be more satisfied with the outcome!

L
Liu Wei Yang
Jun 17, 2021

I hired Thorn Law Group because they were suggested by a friend who had used their IRS Tax Audit services. There is no other tax law firm in the DC area I trust to handle my IRS audit when navigating the IRS. Managing Partner Kevin E. Thorn was diligent and understanding of my situation, and has decades of experience with IRS tax audits. In the end, Thorn Law Group saved my family hundreds of thousands in IRS taxes, interest and penalties.

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