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  1. Capabilities

Tax

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  • Overview
  • Experience

Key Contacts

Olga LoyJames N. MastracchioSusan Elizabeth Seabrook
View Our Full Team

Resources

Tax Impacts

With an international geographic reach, Winston & Strawn’s integrated tax practice addresses virtually all areas of tax law. Our group of 40 tax attorneys is well-versed in representing some of the largest public and privately-held corporations, exempt organizations, and large estates.

Our tax controversy attorneys provide clients with comprehensive coverage of tax dispute risks. Our extensive experience ranges from state and local to federal and international tax matters. We employ a pro-active approach that leverages litigation preparedness to maximize successful outcomes, whether through administrative resolution or at trial in all manner of litigation forums, including state, federal and appellate courts.

Our tax attorneys regularly partner with regional and international Winston practice areas to offer clients legal counsel in the areas of mergers and acquisitions, investments, and restructurings. Our insurance tax attorneys guide insurance companies through all matters affecting their business and products, including tax planning and analysis related to all issues emanating from; (re)insurance arrangements, mergers and acquisitions, capital market offerings, business restructurings, company formations, and transfer pricing and structuring of offshore insurance operations. Our team also helps clients navigate all stages of the controversy lifecycle, including audits, administrative appeals, and litigation of high-dollar value tax controversies of significant interest for insurance industry clients, at both the state and federal levels.

We have long distinguished ourselves in the tax-advantaged financing area and assist developers as well as lenders. Our tax lawyers have extensive experience helping clients with alternative energy and other Congressionally authorized tax incentive programs. We also possess significant practices in federal tax planning and state and local tax planning.

Working closely with our tax attorneys, Winston’s trusts and estates attorneys provide counseling to individuals and corporate fiduciaries regarding estate and tax planning, estate and trust administration, and litigation. We also offer extensive experience in structuring and counseling charitable foundations on tax and corporate issues.

We have successfully assisted clients such as Fage International S.A., Lear Corporation, Nuveen Investments, Inc., Renaissance Technologies, Republic Services, Waste Management, and Yum! Brands. Within the energy industry, we represent EDF Renewable Energy and Invenergy, LLC. We also represent various financial institutions and banks, private equity firms, and hedge funds.

Key Contacts

Olga LoyJames N. MastracchioSusan Elizabeth Seabrook
View Our Full Team

Areas of Focus

Winston & Strawn’s transactional practice has substantial experience in structuring taxable and tax-free corporate restructurings, acquisitions and divestitures, as well as partnership and joint venture arrangements for both U.S. and foreign businesses. In addition, our tax attorneys are active in private equity and REIT transactions and often advise clients on the tax consequences related to corporate debt restructuring and other workouts.

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Winston & Strawn’s tax attorneys provide a broad range of tax planning services for the businesses and transactions of our large domestic and foreign-based clients. These clients represent all major sectors of the global economy. Our work in this area includes the development and utilization of tax-advantaged financings and derivative transactions, structuring foreign investment in U.S. real estate, corporate acquisitions, dispositions, joint ventures, and reorganizations; Subpart F issues; international joint ventures and reorganizations; and REITs. We also assist many U.S.-based multinationals in connection with foreign tax credit planning, including the reduction in the effective rate of foreign tax of the foreign members of the group and the utilization of hybrid structures.

Winston & Strawn now has one of the country’s leading financial tax practices. We represent major banks from Australia, Canada, France, Germany, Israel, Japan, the United Kingdom, and many other countries in connection with their operations in the United States. We represent significant domestic participants in the financial services industry, including hedge funds and private equity firms. Our team has represented financial firms at all stages of the IRS audit process, including appeals proceedings before the IRS seeking to modify or reverse audit determinations. We have obtained a number of favorable settlements and, in one case, an outright reversal of the IRS’s position, enabling our clients to avoid substantial tax assessments without litigation.

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Our Tax Controversy lawyers advise and represent clients in every aspect of tax investigations and the tax enforcement process. This includes both civil and criminal investigations, from IRS to multi-jurisdictional examinations, alternative dispute resolution including IRS Appeals and Competent Authority, and trial court and appellate litigation in every federal court hearing a tax matter. Our team provides technical expertise and a strategic approach to resolving difficult and sensitive tax matters at the earliest stage possible. Our team has decades of experience successfully resolving domestic and international tax issues for clients and includes former government trial counsel, former government prosecutors, and technical specialists with prior Big Four experience.

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Related Capabilities

Corporate Governance
Private Investment Funds
Mergers & Acquisitions
Private Equity
International Trade
Securities, M&A & Corporate Governance Litigation
Tax Controversy & Criminal Tax
Financial Services
Health Care
Insurance

Recent Experience

FAGE International S.A. and FAGE USA Dairy Industry, Inc. Modified Dutch Auction Cash Tender Offer For $107.5 Million of Senior Notes
Chart Industries Acquisition of Howden
Project Energy Reimagined Acquisition Corp. Closes US$250M IPO
RLH Equity Partners and the Equityholders of ClearView Healthcare Partners Sale to GHO Capital Partners
Frontenac Co. Sale of Whitebridge Pet Brands to NXMH, a Belgium-based Family-owned Investment Firm
DistributionNow Acquires Flex Flow Business from GR Energy Services
The Care Team's Acquisition of InTeliCare Home Health and Hospice

Resources

Tax Impacts

Notable

Ranked Tier 1 Nationally in Tax Law

Best Law Firms® 2025

Ranked Tier 3 in Tax: Contentious & Tax: Non-Contentious Law  

The Legal 500 US
Best Law Firms® 2025

Ranked Tier 1 Nationally in Tax Law

The Legal 500 US

Ranked Tier 3 in Tax: Contentious & Tax: Non-Contentious Law  

Related Insights & News

View All Insights & News
Recognitions
Winston Attorneys Named to D Magazine’s 2025 Best Lawyers in Dallas List

May 6, 2025

Client Alert
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April 29, 2025

Speaking Engagement
Angela Russo Speaks at PLI’s 2025 Tax Planning for Domestic & Foreign Partnerships, LLCs, Joint Ventures & Other Strategic Alliances Program

April 22, 2025

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Harvard University’s Tax-Exempt Status Challenged: What Nonprofits Need to Know

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Recognitions
Winston & Strawn Paris Recognized in The Legal 500 EMEA 2025

March 26, 2025

Sponsorship
Winston & Strawn Sponsors Nareit’s REITwise 2025 Law, Accounting & Finance Conference

March 25, 2025

Sponsorship
Winston & Strawn Sponsors, Partners Speak at SFVegas 2025

February 23, 2025

Speaking Engagement
Winston Sponsors, Franklin Shen Speaks at ABA 2025 Midyear Tax Meeting

February 19, 2025

Blog
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February 4, 2025

Blog
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December 10, 2024

Recognitions
Winston Merits 98 Tier 1 Rankings in the 2025 Edition of Best Law Firms®

November 7, 2024

Recognitions
Winston Attorneys Named to D Magazine’s 2025 Best Lawyers in Dallas List
May 6, 2025
Client Alert
The Path to PISCES - Key Milestones for the UK's First Private Securities Trading System
April 29, 2025
Speaking Engagement
Angela Russo Speaks at PLI’s 2025 Tax Planning for Domestic & Foreign Partnerships, LLCs, Joint Ventures & Other Strategic Alliances Program
April 22, 2025
Client Alert
Harvard University’s Tax-Exempt Status Challenged: What Nonprofits Need to Know
April 22, 2025
Blog
Tax Controversy and Litigation Series – Look to Cases from 2024
April 21, 2025
Recognitions
Winston & Strawn Paris Recognized in The Legal 500 EMEA 2025
March 26, 2025
Sponsorship
Winston & Strawn Sponsors Nareit’s REITwise 2025 Law, Accounting & Finance Conference
March 25, 2025
Sponsorship
Winston & Strawn Sponsors, Partners Speak at SFVegas 2025
February 23, 2025
Speaking Engagement
Winston Sponsors, Franklin Shen Speaks at ABA 2025 Midyear Tax Meeting
February 19, 2025
Blog
Micro-Captive Reportable Transactions Regulations Finalized; Challenged
February 4, 2025
Blog
Prospective Tariffs on Goods from Mexico, Canada, and China
December 10, 2024
Recognitions
Winston Merits 98 Tier 1 Rankings in the 2025 Edition of Best Law Firms®
November 7, 2024
View All Insights & News
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