Breen M. Schiller Chair | State & Local Tax Group
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Breen M. Schiller

Breen is a partner at HMB and Chair of the firm’s State and Local Tax (SALT) Group. She focuses her practice on all manners of SALT planning, audit defense and the litigation of sophisticated multi-state and local tax issues.

Breen represents clients ranging from privately-held mid-sized companies to multinational and multi-state Fortune 100 corporations. She provides strategic and practical tax planning and dispute resolution advice that addresses an extensive range of matters, including nexus,business/non-business income, apportionment & alternative apportionment, unitary business principle, combined reporting, federal change reporting and credits and deductions; as well as various sales and use tax engagements such as nexus, exemptions, and inclusions and exclusions from the tax base.

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Practicing nationwide, Breen has extensive experience addressing company and industry-specific tax issues including e-commerce, sharing economy and cloud-computing tax issues. She regularly represents hospitality companies and develops proactive strategies addressing multi-state compliance with the hotel occupancy tax and addresses residency matters for high net worth individuals.

Breen is very active in the SALT community. She is a regular lecturer and frequent contributor to major SALT organizations and publications and serves as the Chair of the IPT 2020 Sales Tax Symposium. She is also a member of the Law360 Tax Authority State & Local Tax Advisory Board as well as the Journal of State Taxation’s Editorial Board.

Holistic SALT Guidance

Clients rely on Breen’s holistic approach to addressing their complex SALT matters. They appreciate that she takes the time to drill into their unique issue, and, recognizing the multi-state and industry-specific issues, develops proactive, innovative solutions.


DePaul University, J.D.

Illinois Wesleyan University, B.A.




  • Law360 Tax Authority State & Local Editorial Advisory Board Member (2020)
  • 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)

Professional Memberships

  • Law360 Tax Authority State & Local Tax Advisory Board, 2019-2020
  • UWM Lubar School of Business SALT Advisory Board
  • Journal of State Taxation, Advisory Board Member
  • Institute for Professionals in Taxation, 2020 Sales Tax Symposium Committee Chair
  • Chicago Bar Association, State and Local Tax Committee
  • Chicago Tax Club
  • American Bar Association, State and Local Tax Committee
  • Illinois Bar Association, State and Local Tax Committee


  • Breen M. Schiller Named to Law360's 2020 Tax Authority State & Local Tax Editorial Advisory BoardJune 3, 2020

    Breen was named to Law360s's 2020 Tax Authority State and Local Tax Editorial Advisory Board. The editorial advisory board provides feedback on Law360's coverage and expertise on State and Local Tax. With Breen's insight, the board will provide an in-depth and thorough report of trends in the SALT community. Read more about the Law360 SALT Editorial Advisory Board here. Learn…

  • Breen M. Schiller Discusses the Impact of COVID-19 on Tax Practices with Law360May 26, 2020

    The COVID-19 pandemic has changed the state and local tax practice in significant ways  including tax agencies, pandemic information glut, virtual client meetings and new schedules and environments. One such impact is the host of new issues to navigate, causing the practitioners to be flexible with deadlines and requirements. But this is not always the case. Breen spoke to Law360…

  • Breen M. Schiller Named to the University of Wisconsin-Milwaukee SALT Program Advisory BoardMarch 6, 2020

    Breen was named to the University of Wisconsin-Milwaukee State and Local Tax Program Advisory Board. With Breen's insight, the school is looking to revitalize the SALT program as well as re-institute the SALT conference. UW-Milwaukee seeks to provide students with the knowledge and skills needed to successfully pursue or advance careers within tax departments of corporations, CPA firms, law firms, and…

  • HMB Elevates Grant Hendricks, David Machemer and Tim Rybicki to PartnerJanuary 8, 2020

    Chicago, IL December 12, 2019 HMB Legal Counsel, a preeminent provider of legal services in Business and Finance, State and Local Tax, Trusts and Estates, Bankruptcy, Reorganization and Creditors' Rights, Real Estate and Litigation announced that three associate attorneys were elevated to partner. Grant R. Hendricks Grant is a member of the firm's Private Client, Trusts and Estates Group. He…

  • David Hughes and Breen Schiller added to Law360's Tax Authority State & Local Editorial Advisory BoardApril 23, 2019

    The purpose of the editorial advisory board is to get feedback on Law360's coverage and gain insight from experts in the field on how best to shape future coverage. David represents clients in multistate planning, audit and controversy matters, including state income, franchise, gross receipts, sales/use and unclaimed property. Hughes is also an adjunct professor of state and local tax…




  • City of Chicago Department of Finance Changes the Terms of its Voluntary Disclosure ProgramDecember 14, 2017

    With no formal announcement it appears that the City of Chicago Department of Finance (?City?) has changed the terms of its voluntary disclosure program (?VDA Program?).

  • Airbnb Voluntarily Agrees to Collect and Remit Hotel Taxes in D.C. and ChicagoFebruary 2, 2015

    Airbnb Inc. ("Airbnb") announced January 28 that it has voluntarily agreed to collect and remit hotel taxes in the District of Columbia and Chicago.

  • If at First You Don't Succeed, Try, Try AgainNovember 13, 2014

    The City of Chicago imposes an amusement tax (?Amusement Tax? or ?Ordinance?) on the patrons of any amusement within Chicago based on ?the admission fees or other charges for the privilege to enter, witness, view or participate in the amusement.? Municipal Code of Chicago (?M.C.C.?) ? 4-156-020. The tax is nine-percent (9%) of the ?admission fees or other charges.? M.C.C. ? 4-156-010. But is this tax legal?

  • It's About Time--Hopefully This Trend ContinuesNovember 4, 2014

    On October 23, 2014, Judge Mulroy, a Cook County Circuit Court judge, ruled against Schad, Diamond & Shedden, P.C. ("Diamond") in one of the hundreds of qui tam tax cases that Diamond currently has pending before him. During a two-day bench trial in August, National Business Furniture's financial officers said they had relied on a completed Illinois Department of Revenue…

  • Quinn Signs the Illinois Amazon Tax into LawAugust 28, 2014

    Quinn signed into law the Illinois "Amazon tax" that requires the online retailer with affiliates in Illinois to collect a ?use tax? for all sales to Illinois customers. Illinois' first attempt at an Amazon law was struck down by the Illinois Supreme Court under the U.S. Constitution?s Supremacy Clause, which prohibits States from passing laws that conflict with federal law. Illinois? original affiliate tax fell because it directly conflicted with the Internet Tax Freedom Act, a federal law that prohibits discrimination against electronic commerce...

  • DePaul University, J.D.
  • Illinois Wesleyan University, B.A.
  • Illinois
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