Skip to content

Mary E. Monahan

Partner
Tax Group Deputy Practice Group Leader

Mary represents taxpayers in a broad range of industries. 

These include e-commerce and insurance, international tax planning, insurance company and products tax issues, information reporting and withholding, employment taxes, and IRS audits, appeals and litigation. 

Mary counsels domestic and multinational corporations in all industries, including e-commerce, insurance, manufacturing, retail, technology and communications, with respect to a wide range of tax matters, including international tax and tax planning, permanent establishment issues, e-commerce and marketplace issues, insurance company and insurance product tax issues, interest on IRS underpayments and overpayments, information reporting and withholding matters, employment tax matters, and eligibility for the research tax credit. 

Mary's broad range of substantive experience draws on more than 30 years of controversy experience at IRS Exam, Appeals and litigation in the Tax Court, Court of Federal Claims, District Courts, Courts of Appeals and the U.S. Supreme Court.

  • Federal Tax Update, February 21, 2024, TEI Chicago Chapter’s Federal Tax Seminar
  • The Future of Chevron Deference, February 21, 2024, TEI Chicago Chapter’s Federal Tax Seminar
  • Mistakes Were Made: Considerations for Addressing Errors in Tax Filings, February 21, 2024, TEI Chicago Chapter’s Federal Tax Seminar
  • Mistakes Were Made: Considerations for Addressing Errors in Tax Filings, December 19, 2023, 2023 Ethics Webinar Series
  • Current Developments: Credit Funds, Global Workforce and OECD/UN/EU Developments, BEAT Issues; Other “Hot” Topics, December 15, 2023, 34th Annual Institute on Current Issues in International Taxation
  • Mistakes were Made: Considerations for Addressing Errors in Tax Filings, November 2, 2023, Philly Tax Day
  • International Tax: The Ever-Changing Landscape, November 2, 2023, Philly Tax Day
  • Developments in Tax Controversy and Transfer Pricing, September 22, 2023, TEI New England
  • The IRA and Energy Credits for Non-Energy Companies, September 22, 2023, TEI New England
  • Getting you up to speed: Global updates on Pillar Two progress, September 20, 2023
  • Green Tax Incentives, September 18, 2023, Climate Week 2023
  • Information Reporting and Withholding on Insurance Products, June 1, 2023, FBA Insurance Tax Seminar
  • International (BEPS - Pillar 2) Operational Challenges, May 8, 2023, TEI Region 9 Conference
  • Emerging Consensus or End of the Road? The OECD’s Inclusive Framework and Implications for U.S. Multinationals, March 23, 2023, Federal/International Tax Day
  • Panel 4: Character and Source for the 21st Century, March 23, 2023, Federal/International Tax Day
  • Failed Contracts, Errors, and How to Correct Them, February 10, 2023, ABA Midyear Tax Meeting
  • International Tax Examination Issues, December 15, 2022, GW/IRS Institute
  • International Tax Examination Issues (incl. CAP, Competent Authority, etc.), December 15, 2022, GW/IRS Institute
  • Circular 230 and Tax Opinion Standards: From “Will” to “No Way,” November 16, 2022, Philly Tax Day
  • New Nimble Global Business: Tax Considerations for Global Operations, November 16, 2022, Philly Tax Day
  • ESG and Fulfilling Your Green Pledges: Energy Tax Credits and Monetization Strategies, November 16, 2022, Philly Tax Day
  • Challenging the Validity of Treasury Regulations and IRS Guidance – Considerations (and Major Questions) for the In-House Tax Professional, October 25, 2022, 77th TEI Annual Conference
  • Information Reporting and Withholding on Insurance Products, June 2, 2022, Federal Bar Association 37th Annual Insurance Tax Seminar
  • Audit Panel - Best Practices, Tips, etc. May 17, 2022, TEI Region 10 Annual Conference
  • Federal Tax Implications of International Tax Reforms: OECD’s Two Pillars at Home, March 16, 2022, TEI Silicon Valley Federal Tax Days
  • Life Insurance Companies and Products Tax Basics, February 9, 2022, Eversheds Sutherland
  • Federal Tax Considerations in Day-to-Day Transactions, January 13, 2022, Eversheds Sutherland Information Reporting Webcast
  • Latest Developments in Cross-Border Reporting Under DAC6 & DAC7, October 26, 2021, 76th TEI Annual Conference
  • Navigating International Marketplace Taxation Regimes, October 14, 2021
  • EU Disclosure Documentation (DAC6), September 10, 2021, Pacific Rim Tax Conference
  • International perspectives on global tax reform proposals, July 14, 2021
  • Federal Legislative Developments, June 29, 2021, TEI
  • Tax Authority 2.0, April 29, 2021, Law360
  • Changes for Companies with non-US Operations, April 28, 2021, The Made in America Tax Plan series
  • The Made in America Tax Plan Series, April 21, 22 and 28
  • Federal Tax Considerations in Day-to-Day Transactions, March 18, 2021, TEI Silicon Valley
  • Isn't It Inconvenient? Work-From-Home Issues for Corporations and Their Employees, March 16, 2021, TEI Mid-Atlantic webinar series
  • TEI Mid-Atlantic Webcast Series, March 15-16, 2021
  • Tax Research 101, March 2, 2021, Tax Research 101 CLE/CPE training
  • Digital Economy and an Update on OECD Initiatives, February 18, 2021, TEI/UW Annual Tax Forum
  • The Future of US Tax: Presidential Proposals and Tax Legislative Outlook, September 3, 2020, TEI
  • Federal Tax Update - Remote Control, June 18, 2020
  • A Cup of Coffee with Troy Olsen, May 29, 2020
  • How the COVID-19 Pandemic Has Impacted Individuals, Foreign Workers and their Corporate Employers The OECD and U.S. Tax Perspective, May 11, 2020, IFA
  • FAQs on the CARES Act and COVID-19 related tax issues for insurance companies, April 2, 2020
  • COVID-19 - Considerations for Employers, March 26, 2020
  • Practical Considerations For a Mobile Workforce, November 21, 2019, Philly CPE Day
  • Methods to the Madness, November 19, 2019, TEI Portland Chapter Seminar
  • The New Worldwide Territoriality, November 19, 2019, TEI Portland Chapter Seminar
  • The Importance of Procedure: Understanding Altera and the Significance of Transfer Pricing Litigation to Current and Future U.S. Tax Regulation, April 18, 2019, TEI Detroit International Tax Day
  • Global Controversy Update: Significant Cross Border Controversy Matters in the US and Europe and Implications for US Multinationals, April 18, 2019, TEI Detroit International Tax Day
  • Eversheds Sutherland Year-End Tax Seminar – Navigating the Changing World of Tax, November 14, 2018
  • Eversheds Sutherland Seattle CPE Day – Navigating the Changing World of Tax, November 6-7, 2018
  • Recognized by The Legal 500 United States in the area of international tax (2021-2023)
  • Dean’s Fellow, George Washington University National Law Center (1990-1991)
  • Winner, Tenth Annual Student Writing Contest of the American College of Tax Counsel (1991)
  • Master, J. Edgar Murdock American Inn of Court
  • District of Columbia
  • Maryland
  • A.B., cum laude, Georgetown University
  • J.D., with high honors, George Washington University National Law Center,

    Articles Editor, George Washington Law Review, Order of the Coif

Mary Monahan

Partner

Tax Group Deputy Practice Group Leader

Mary Monahan

Partner

Tax Group Deputy Practice Group Leader

Email