Thorn Law Group is a lawyer in Washington, DC. Open: Mon–Fri 9:00 AM – 5:00 PM; Sat–Sun Closed. Phone: (202) 349-4033. Average rating is 4.6 stars from 19 reviews. Website: http://www.thorntaxlaw.com/?utm_source=GMBlisting&utm_medium=organic.
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A lawyer seated in a modern office environment. — Thorn Law Group
4.6 19 reviews Today 9:00 AM – 5:00 PM

Fearless Tax Defense When the Stakes Are Highest

Washington, DC tax attorneys who take on the IRS, DOJ, and complex international tax matters head-on.

About Us

When a letter arrives from the Department of Justice or the IRS, most people panic. Clients of Thorn Law Group pick up the phone and call Kevin Thorn. Based at 888 16th Street NW, steps from the White House and the corridors of federal power, this firm was built specifically to handle the tax disputes that other attorneys quietly decline.

Managing Partner Kevin E. Thorn has spent his career at the intersection of tax law, criminal defense, and international finance. His clients include U.S. citizens living abroad with undisclosed foreign accounts, executives facing IRS audits, and individuals navigating the labyrinthine rules that followed recent sweeping tax reform. The firm's 4.6-star rating reflects something specific: clients who arrived terrified left with clarity and, more often than not, a resolution they did not think was possible.

This is not a generalist law firm that handles tax work on the side. Every attorney here focuses on tax controversy and tax planning, which means the knowledge runs deep and the strategy is sharp. If your situation involves the IRS, the DOJ, FBAR penalties, or foreign account compliance, you are in the right place.

What We Offer

Thorn Law Group handles the full spectrum of high-stakes tax matters, from criminal tax defense and IRS audit representation to voluntary disclosure programs for unreported offshore accounts. The firm's international tax practice is particularly strong, guiding dual-resident families, expatriates, and foreign nationals through the compliance requirements that trip up even sophisticated taxpayers.

On the civil side, the team negotiates offers in compromise, penalty abatement requests, and installment agreements, turning seemingly impossible IRS balances into manageable outcomes. The firm also advises on tax planning for individuals and businesses seeking to stay compliant as laws evolve, including guidance on the Foreign Account Tax Compliance Act and FBAR reporting obligations.

Every engagement begins with a frank assessment of your actual exposure and a concrete plan to address it. No vague reassurances, no billable hours spent on work that does not move your case forward.

Why Choose Us

Kevin Thorn personally leads client strategy, not junior associates, on every significant tax controversy matter.
Proven record defending clients against Department of Justice investigations involving undisclosed Swiss and offshore bank accounts.
Deep expertise in FBAR, FATCA, and international tax compliance for U.S. citizens living and working abroad.
Located at 888 16th St NW, a block from the White House, with direct proximity to federal agencies and courts.
Rated 4.6 out of 5 stars by clients who came in facing audits, criminal referrals, and IRS collection actions.
Handles both criminal defense and civil tax resolution, so your strategy is coordinated across every front.

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What Our Customers Say

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⭐⭐⭐⭐⭐
12 years ago
"Kevin Thorn, Managing Partner of Thorn Law Group, is an excellent adviser. My family and I are US citizens living in Europe and the US. Mr. Thorn helped us to understand our opportunities for international investments and estate planning issues so that my siblings and I may continue to further the growth of our businesses, to care for our aging parents and provide for our children. Mr. Thorn and his team were sensitive to our family’s needs and helped us identify and understand our options and potential risks associated with US and international activity. They also helped us to ensure our complex structure of international accounts and asset holdings are in compliance with US tax and disclosure laws through the IRS offshore voluntary disclosure program. I highly recommend Kevin Thorn and the dedicated attorneys at Thorn Law Group."
— Elena Cardaropoli
⭐⭐⭐⭐⭐
12 years ago
"Kevin E. Thorn and the tax attorneys at Thorn Law Group are exceptional. When I came to them, I had just received a letter from the Department of Justice concerning an undisclosed bank account at a Swiss bank. I thought I was going to go to jail and lose everything I had worked for just because my family and my business are international. Mr. Thorn’s knowledge of the tax laws and his skills in presenting my situation to the IRS and Department of Justice proved superior! Mr. Thorn proved to be a compassionate attorney when listening to me and addressing my concerns, as well as a passionate advocate when fighting for me with the government. The whole process was much less painful than I expected thanks to his expert advocacy. I can sleep at night now that Kevin Thorn and his team have resolved my case. I highly recommend Kevin Thorn to anyone with issues before the IRS or department of Justice."
— Emma Zdon
⭐⭐⭐⭐⭐
6 years ago
"Thorn Law Group is an excellent tax law firm. I have come to them for a couple of different complicated taxation issues over the years, from an IRS audit to the interpretation of the new tax laws regarding cryptocurrency. Most recently, Thorn Law Group LLC was able to take care of my offshore bank account IRS issues. Kevin E Thorn, the managing partner, was very kind and thorough throughout the entire legal process. Mr. Thorn has always answered all of my questions I had regarding each issue over the years and reassured me what was going on with my case every step of the way. I have referred many family members and friends to Thorn Law Group LLC, and they have all said nothing but positive things about their firm."
— J W
⭐⭐⭐⭐⭐
11 years ago
"Thorn Law Group is a boutique tax law firm that has experienced attorneys to deal with civil and criminal tax controversies, and tax litigation. The firm has represented 100s of clients in the IRS Offshore Voluntary Disclosure Programs for 2009, 1012 and 2014. Mr. Thorn has extensive experience in tax controversies, criminal audit, international tax, IRS’s amnesty program and other complicated tax issues. Mr. Thorn, an astute negotiator, has gained a reputation as the “go to” lawyer for IRS Voluntary Disclosures through out the country and around the world. Thorn Law Group uses its more than 40 years of combined experience to resolve clients’ issues. The Partners at the Thorn Law Group are former IRS Attorneys and such experience in many cases is the difference maker in negotiating the best settlement. The associates at the firm have been educated at some of the best educational institutions in the world, and in some instances have received law degrees form foreign countries including but not limited to China, India and France."
— Shivam Kumar B
⭐⭐⭐⭐⭐
11 years ago
"The attorneys at Thorn Law Group, PLLC have significant experience in all phases of tax controversy, fraud and tax litigation. The Managing Partner, Kevin Thorn, is incredibly personable, yet also brilliant at what he does. Kevin’s depth of knowledge in tax administration and procedure provides us with valuable insight into the government’s and the courts’ perspectives in our case. I would definitely recommend the firm to anyone with needs in resolving any kind of tax disputes."
— Xin N

Frequently Asked Questions

What types of tax problems does Thorn Law Group handle?

The firm focuses on IRS audits, criminal tax defense, offshore account disclosure, FBAR penalty disputes, offers in compromise, and international tax compliance for expatriates and foreign nationals. If your issue involves the IRS or Department of Justice, this is the firm's core practice.

I received a letter from the Department of Justice about an undisclosed foreign bank account. What should I do?

Contact a tax attorney immediately before responding. A DOJ letter signals a criminal investigation is either underway or imminent. Kevin Thorn has specific experience defending clients in exactly this situation, including cases involving Swiss bank accounts. Do not speak with investigators without legal representation.

Can Thorn Law Group help me if I am a U.S. citizen living outside the United States?

Yes. A significant portion of the firm's practice involves U.S. citizens abroad who face complex filing obligations, FBAR requirements, and FATCA reporting. The firm advises clients living in Europe and elsewhere on both compliance and resolving past non-filing situations.

What is the Voluntary Disclosure Program and should I consider it?

The IRS Voluntary Disclosure Program allows taxpayers with unreported income or foreign accounts to come forward proactively, often reducing criminal exposure significantly. Whether it is the right strategy depends on your specific facts. Thorn Law Group can evaluate your situation and advise whether disclosure or another approach better protects you.

How do I schedule a consultation with Thorn Law Group?

Visit thorntaxlaw.com to reach the firm directly. The office is located at 888 16th Street NW, Suite 800, Washington, DC 20006. Initial consultations are used to assess your situation and determine the best path forward.

Does the firm handle IRS audits for businesses as well as individuals?

Yes. Thorn Law Group represents both individuals and business entities in IRS examinations, appeals, and tax court proceedings. The firm also advises on interpreting new tax legislation as it applies to business structures and transactions.

What makes Thorn Law Group different from a general practice attorney who also does taxes?

Tax controversy and international tax law are not sidelines here. Every attorney at the firm concentrates exclusively on tax matters, which means the depth of knowledge and the quality of strategy are fundamentally different from what a generalist can offer when your financial future is at risk.

Hours of Operation

Closed · Opens Monday at 9:00 AM
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 Today 9:00 AM – 5:00 PM
Saturday Closed
Sunday Closed

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