Illinois Audit, Tax and Consulting

The fifth largest in Illinois

With eight offices and more than 1,400 professionals throughout the state, we’re not only the fifth-largest accounting firm in Illinois, but also the largest focused on middle market companies. We combine full-service capabilities with deep resources, industry knowledge and senior-level involvement to help our clients succeed. Illinois is also home to RSM’s corporate headquarters, located at One South Wacker Drive in Chicago.

Our client service

Our Illinois offices serve midsized businesses in a variety of industries, including manufacturing and wholesale distribution, financial institutions, health care, real estate, private equity groups, financial services, government entities and nonprofit organizations.

Our charitable efforts

In addition to serving the needs of our clients, our Illinois offices are committed to serving the needs of our community. Through the personal and collective efforts of our professionals, we are actively involved by devoting time, money and support to a variety of charitable organizations and community efforts.  Some of the representative organizations include the Greater Chicago Food Depository, YMCA, Big Brothers Big Sisters, The Salvation Army and Special Olympics Illinois.

Employment opportunities

For information about the employment opportunities currently available in Illinois, please visit the Careers section of our site.

Illinois Insights

State tax credits bring opportunity to growing businesses

Businesses expanding or increasing activity in their current state or in new states should consider the benefits of state tax credits.

US Supreme Court requests response to retroactivity petition

High court looking for Washington Department of Revenue to respond to Dot Foods petition for writ of certiorari by early December.

Illinois tribunal determines CNG is a taxable motor fuel

Illinois Independent Tax Tribunal rejected argument that the motor fuel tax statutes exclude compressed natural gas.

Illinois adopts click-through nexus rules

Illinois department adopts guidelines for rebutting the presumption that nexus is established through click-through agreements.

Chicago issues new rulings on the taxability of certain web-based services

Chicago issues guidance regarding the taxability of nonpossessory computer leases and streaming movies and games.

Illinois expands applicability of insurance self-procurement tax

Illinois passes a bill to expand applicability of the insurance self-procurement tax to previously exempt Illinois-based middle market companies.

Illinois amends click-through nexus law

Illinois passes a bill to amend the click-through nexus law previously struck down by the Illinois Supreme Court.

Illinois MPC and graphics arts equipment exemption ends Aug. 30, 2014

The Illinois Manufacturer’s Purchase Credit and Graphic Arts Machinery and Equipment Exemption were not extended and will end Aug. 30, 2014.

2014 Manufacturing & Distribution Monitor state reports

To supplement the 2014 Monitor report, a number of additional reports provide an in-depth look at the industry in various states across the country.

Illinois Supreme Court invalidates local sales tax sourcing rule

The Illinois Supreme Court rules local sales and use tax sourcing regulations invalid but waives assessment against taxpayer that followed the regulations.

Illinois Manufacturer's Purchase Credit

The Illinois manufacturer’s purchase credit provides a tax credit for certain machinery and equipment purchases. Claims must be filed by June 30.

Taxation of Illinois resident trust found unconstitutional

An Illinois appellate court rules resident trust classification of decanted Illinois trust violates the due process clause of the U.S. Constitution.

Illinois Locations

Corporate Headquarters

1 S Wacker Dr
Suite 800
Chicago, IL 60606

John Bird, Office Managing Partner
Rick Edelheit, Office Managing Partner
Milton Marcotte, Office Managing Partner
Pete Mulvey, Office Managing Partner
Paul Nockels, Office Managing Partner
Barry Rosenthal, Office Managing Partner


2021 S. 1st Street
Suite 110
Champaign, Illinois 61820

Dave Seiler, Office Managing Partner


117 East Main St.
Suite 210
Galesburg, IL 61401


401 Main St.
Suite 1200
Peoria, IL 61602

Tom Farrell, Office Managing Partner


1252 Bell Valley Road
Suite 300
Rockford, IL 61108

Mark Chaberski, Office Managing Partner


20 N. Martingale Road
Suite 500
Schaumburg, IL 60173

Rob Stoettner, Office Managing Partner


1 North Old State Capitol Plaza
Suite 500
Springfield, IL 62701

Illinois Events

Emerging risks seminar: 2016 cybersecurity executive forum

Learn about emerging cybersecurity risks and how your organization can implement effective strategies to protect key information.

  • October 11, 2016

2017 Spring Financial Institution Strategic Forum

The 2017 Financial Institution Strategic Forum addresses critical issues bankers need to understand in today’s complex marketplace.

  • May 11, 2017

2017 Annual Chicago Nonprofit Summit

Our annual seminar and networking event focused on the unique finance and operational needs of nonprofit organizations.

  • May 24, 2017

2017 RSM Dynamics Summit Series

These events feature the opportunity to consult with RSM technology specialists, learn real-world best practices and broaden your network.

  • April 20, 2017

RSM and PCBB’s 2017 Executive Management Road Tour

Learn what the Trump administration and today's economy mean for banks, how to address CECL, where competitive opportunities are and more.

  • August 07, 2017