Breen M. Schiller

Breen M. Schiller

BREEN M. SCHILLER is a partner with Horwood Marcus and Berk Chartered where she concentrates her practice in state and local tax planning and the resolution of state and local tax controversies for multi-state and multi-national corporations.

Breen represents clients across the country on diverse income tax engagements such as nexus, business/nonbusiness income, apportionment, unitary business principle, combined reporting, federal change reporting and credits and deductions and various sales and use tax engagements such as nexus, exemptions, and inclusions and exclusions from the tax base, in addition to e-commerce, sharing economy and cloud-computing issues and hotel occupancy tax related issues.  This experience helps Breen assist her clients in developing innovative solutions for multistate tax issues as well as the practical resolution of disputes. 

Breen is a frequent speaker on state and local tax matters for the Council on State Taxation (COST), the Institute for Professionals in Taxation (IPT), the Paul J. Hartman State Tax Forum and Tax Executives Institute (TEI), Taxpayers' Federation of Illinois (TFI), and Chicago Tax Club. Breen has had articles published in The Journal of State Taxation, the IPT Insider, State Tax Notes and The Journal of Multistate Taxation. Breen currently serves as the vice-chair of the IPT 2019 Sales Tax Symposium and is a member of the Law360 Tax Authority State & Local Tax Advisory Board. 



  • Emerging Lawyer, 2015-2018
  • Institute for Professionals in Taxation, New Member Achievement Award, 2017
  • Institute for Professionals in Taxation, Special Topic of the Year Award, 2016


  • Chicago Bar Association, State and Local Tax Committee
  • Chicago Tax Club
  • Institute for Professionals in Taxation, Income Tax Committee Chair
  • Journal of State Taxation, Advisory Board Member
  • American Bar Association, State and Local Tax Committee
  • Illinois Bar Association, State and Local Tax Committee
  • Institute for Professionals in Taxation, Sales Tax Symposium Committee Vice Chair
  • Law360 Tax Authority State & Local Tax Advisory Board


Practice Groups


Industries Served

  • Automotive Manufacturing & Dealerships
  • Banking
  • Broadcast Media
  • Construction
  • Energy & Utilities
  • Entrepreneur/Start-Up Companies
  • Financial Services
  • Food/Beverage Services & Hospitality
  • Healthcare
  • Information Technology
  • Leasing Companies
  • Logistics
  • Manufacturing & Distribution
  • Mortgage Companies
  • Not-For-Profit Organizations
  • Pharmaceuticals
  • Retail
  • Service Companies
  • Specialty Finance
  • Telecommunications
  • Trading Companies



News & Events



    • Contact Information
    • Bar Admissions
      • Illinois  (2007)
    • Education
      • DePaul University, J.D., 2007
      • Illinois Wesleyan University, B.A., 2003

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