Hallie Aronson

Associate | New Haven

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+1 203 974 0373
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Secretary Rosemarie DeVincenzi

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+1 203 974 0359

Hallie is an associate in the private client and tax team.

Hallie dedicates her practice to offshore voluntary disclosure cases. She helps to guide clients through the complex regulatory web designed to ensnare both willful and non-willful taxpayers who have made certain reporting errors pertaining to offshore accounts, assets, pensions, entities and trusts. Hallie helps clients determine the most appropriate voluntary disclosure program for their particular set of circumstances. She advocates strongly and strategically for her clients to help minimize criminal and civil penalty exposure stemming from their intentional or accidental US tax filing errors. Hallie works closely with her clients and their accountants and financial intermediaries to prepare the necessary US tax and informational reporting forms to remedy past filing errors. Hallie also has a background in estate planning and family law, which provides a useful backdrop in advising many of her voluntary disclosure clients.

Achievements 

Hallie is recognized in the 2026 edition of Best Lawyers: Ones to Watch® in America for Tax Law.

Recent recognition

2026 Best Lawyers recognition badge for Hallie Aronson

Me in a minute

I am so lucky to have found my passion in tax controversy work. Our clients come to us at a time when they face a great deal of stress and fear. The nurturer in me enjoys counselling clients through this difficult time, both with respect to their legal options, as well as their personal struggles. I embrace each clients' story and then personalize it in the case that we present to the IRS. Our clients feel supported, heard and understood, which is helpful to them and rewarding for me. It is this mentality that contributes to our record of success in these cases.

Experience

Family businesses Founders
High net worth individuals Tax

Track record

Offshore Voluntary Disclosure

Helped two sisters, both Offshore Voluntary Disclosure clients, facing a multimillion dollar (50%) penalty, to achieve a zero penalty result. They were thrilled, as the application of the 50% penalty would have decimated their retirement savings. They are now personal friends, and are enjoying their retirement in a warm, sunny local.

Reduction of tax assessment

Reduced a New York City tax assessment by 50% for a client, by putting forth several out-of-the box arguments for reducing this assessment.

Nonwillful filing errors

Helped numerous clients convey their nonwillful (accidental) filing errors to the IRS in a manner that resulted in a mere 5% penalty in Streamlined Domestic Offshore Procedure cases (and 0% penalty in Streamlined Foreign Offshore Procedure cases).

US tax compliance

Have counselled numerous clients facing criminal penalties and jail time, to come into US tax compliance with tolerable civil penalties.

Insight

29 November 2021 | Article

Shannon Smith and Hallie Aronson co-author "How to Survive an IRS Crypto Tax Audit" article for Forkast News
Picture of a woman sitting on a cliff edge

26 March 2018 | Article

It's the end of the OVDP world as we know it

External publications

  • 'Foreign Accounts and Asset Reporting,' American Foreign Service Association: The Foreign Service Journal - January/February 2025, co-author

  • 'How to Survive an IRS Crypto Tax Audit,' Forkast - November 24, 2021, co-author

  • 'Surviving an IRS Cryptocurrency or Other Crypto Asset Audit,' Bitcoin Magazine - September 27, 2021, co-author

  • 'A Target on American Clients in Canada,' Wealth Professional Canada - April 3, 2020, co-author

  • '2018 federal and state tax provisions for the foreign service', The Foreign Service Journal - January - February 2019, contributor

  • 'Its the end of the OVDP world as we know it', Withers article - March 26, 2018, co-author

  • 'The urgency of FBAR reporting for US persons living in China', Private Asset Management - August 1, 2016, co-author

  • 'Efficient gifting: Trusts and tax-advantaged accounts are powerful tools for gifting to children', Financial Advisor Magazine - March 2010, co-author

  • 'Let's start with gifting - Annual Exclusions', Private Wealth Magazine - March/April Edition 2010, co-author

  • 'FLP care and maintenance', Financial Advisor Magazine - December 2008, co-author

Admissions

  • New York, 2007

  • Maryland, 2005

  • Connecticut, 2007

Education

  • Georgetown University Law Center, Washington, DC, LLM, Taxation

  • University of Baltimore School of Law, Baltimore, MD, Juris Doctor

  • Emory University, Goizuetta Business School, Atlanta, GA, Bachelor of Business Administration

Languages

  • English

Key dates

  • Year joined: 2007

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