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

Illinois enacts broad tax changes

The 2019 legislature passed several tax changes, issued marketplace facilitator rules and provided additional credits and incentives.

Strategies to maximize R&D for automotive companies

The ability of automakers and suppliers to include tooling expenses in their R&D credit can create a tremendous benefit.

Illinois Tool Works wins Tax Court debt-equity case

IRS’ attempt to re-characterize loan as a distribution from subsidiary’s earnings fails under debt-equity principles.

Illinois enacts FY19 budget with economic sales tax nexus provisions

Illinois’ FY19 budget legislation easily passes the general assembly with minor tax changes, including sales tax nexus expansion.

Illinois restores EDGE and Angel Investment Tax Credit programs

Illinois extends sunset of the Economic Development for a Growing Economy and Angel Investment tax credits for an additional five years.

Illinois enacts first state budget since 2015

The budget increases personal and corporate tax rates, makes tax exemption and credit changes and revises the unclaimed property law.

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 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

John Kaiser, Office Managing Partner


1252 Bell Valley Road
Suite 300
Rockford, IL 61108

Pat Shaw, 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

Careers in Illinois

Search open positions in Illinois, or learn more about working at RSM.

Still a student? Learn more about our Internships.

Illinois Events

United Fresh 2019

FreshTec 2019 features networking, education, and a product showcase with produce operations and fresh-cut processing executives.

  • June 10, 2019

RSM Technology Summit Chicagoland

The RSM Technology Summit is a one-day event that offers educational sessions specifically for Microsoft Dynamics GP users.

  • May 07, 2019

RSM and Cisco: The future of collaboration

Join RSM and Cisco for a complimentary brunch on April 4 in Chicago, IL to discuss the future of collaboration.

  • April 04, 2019