Breen Schiller, a Greenberg Traurig shareholder in the Chicago office, recently submitted formal comments to the Illinois Department of Revenue (IDOR or Department) and the Joint Committee on Administrative Rules (JCAR) regarding the Department’s proposed amendments to 86 Ill. Adm. Code Section 100.2430 – the regulation governing addbacks for interest and intangible expenses in transactions with 80/20 companies. In addition to submitting written comments, Schiller also testified at the subject matter hearing before the Department, offering recommendations regarding clarity and administrability in the rulemaking process. 

Key Issues Addressed 

  • Conduit Exception Narrowing: The draft regulation imposes tracing requirements and prohibits reasonable fungibility, which may disqualify market-based financing and IP structures. This approach appears to depart from the statute’s original purpose of targeting tax-motivated base erosion – rather than arm’s-length, third-party costs. 
  • “Unreasonable” Standard Limitations: For tax years ending on or after Dec. 31, 2025, the draft provides that it is not “unreasonable” to require addback solely because the foreign recipient is subject to a net income tax, the terms are arm’s length, or the principal purpose is not tax avoidance. This construction may limit the practical effect of the statutory safety valve and leave taxpayers without clear guidance. 
  • Reliance on Private Letter Rulings (PLRs): The draft directs taxpayers to seek PLRs for relief. Because PLRs are publicly available, binding only on the requester, and unavailable for hypothetical transactions, this approach may present administrability challenges for common fact patterns and raises questions about confidentiality and predictability. 

Advocacy Highlights 

  • Schiller recommended that the Department consider a workable conduit framework that allows reasonable fungibility and allocation methodologies where contemporaneous documentation shows external third-party financing economically supports the intercompany arrangement. 
  • Schiller recommended reinstating core commercial factors – arm’s-length terms, absence of tax-avoidance purpose, and foreign net-income taxation – as affirmative factors in the unreasonableness analysis. 
  • Schiller called for balanced, quantitative examples reflecting relief in common scenarios, and for the creation of a documentation safe harbor to guide compliant taxpayers and reduce controversy. 
  • Schiller emphasized the need for a workable alternative procedure through which taxpayers may request guidance on whether they qualify for the unreasonable exception, in lieu of a PLR. 

The proposed amendments raise questions about administrability and the potential for double taxation and may create uncertainty for Illinois businesses. Schiller’s comments and testimony address potential concerns regarding clarity and administrability within the framework. 

Print:
Email this postTweet this postLike this postShare this post on LinkedIn
Photo of Breen Schiller Breen Schiller

Breen M. Schiller is a nationally recognized state and local tax (SALT) attorney with deep experience in SALT planning, audit defense, and complex litigation across multiple tax types, including income, franchise, gross receipts-based taxes, and sales/use taxes, on a multistate basis. She advises

Breen M. Schiller is a nationally recognized state and local tax (SALT) attorney with deep experience in SALT planning, audit defense, and complex litigation across multiple tax types, including income, franchise, gross receipts-based taxes, and sales/use taxes, on a multistate basis. She advises a wide range of clients, from privately held mid-size businesses to multinational Fortune 100 corporations, on strategic and practical tax planning and dispute resolution.

Breen’s practice spans a broad spectrum of SALT issues, including nexus determinations, business/nonbusiness income classifications, apportionment and alternative apportionment methodologies, unitary business principles, combined reporting, federal change reporting, and credits and deductions. She also handles a variety of sales and use tax matters, such as exemption qualifications, inclusions and exclusions from the tax base, and issues related to digital products and cloud computing.

She has represented taxpayers at all levels of state and local tax controversy – from administrative proceedings to appellate court arguments – and has wide-ranging experience with audit defense, negotiated settlements, refund claims, and compliance matters. Leveraging her credibility with state departments of revenue, Breen has helped clients secure refunds and obtain key rulings, as well as secure proactive resolutions to matters.

Practicing nationwide, Breen regularly advises companies in the transportation, hospitality, manufacturing, retail, and oil and gas sectors. She has managed high-volume, multijurisdictional tax litigation while simultaneously developing proactive strategies to address multistate compliance for both income and sales/use taxes. Her approach is holistic and client-focused, shaped by her 15 years in private practice and leadership roles at top law firms. Prior to joining the firm, Breen was a Principal in EY’s National Tax Group.

Breen is a national thought leader on state tax issues and is deeply engaged in the SALT community. She co-founded Women in SALT, a group dedicated to connecting female SALT practitioners and fostering a collegial, collaborative network. She also serves on several advisory boards, including the Bloomberg State Tax Advisory Board, the Journal of State Taxation Editorial Board, the Paul J. Hartman Advisory Board, and the board of trustees for the Taxpayers’ Federation of Illinois. A frequent lecturer and contributor to major SALT organizations and publications, Breen is known for her insightful analysis of evolving tax policies and their implications for businesses operating across multiple jurisdictions.