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welcome to cost

The Council On State Taxation (COST) is the premier state tax organization representing taxpayers.  COST is a nonprofit trade association consisting of more than 600 multistate corporations engaged in interstate and international business.  COST's objective is to preserve and promote equitable and nondiscriminatory state and local taxation of multijurisdictional business entities.


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Study: Total State and Local Business Taxes (August 2014)

Businesses paid $671 billion in state and local taxes in FY2013, an increase of 4.39% from FY2012.  Click here for state-by-state and industry details of business taxes.


Canadian Taxes Workshop for U.S. Companies

October 2 - 3, 2014
Chicago, Illinois
The Hyatt Lodge at McDonald's Campus

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45th Annual Meeting

October 19 - 22, 2014
Hollywood, Florida
Westin Diplomat

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westin diplomat

Support the Mobile Workforce State Income Tax Simplification Act

The Mobile Workforce State Income Tax Simplification Act has companion bills pending in both chambers of Congress. S. 1645 was introduced on November 5, 2013 by lead sponsors Senator Sherrod Brown (D-OH) and Senator John Thune (R-SD), and has been referred to the Senate Finance Committee of which both lead sponsors are members. The companion House bill, H.R. 1129, was previously introduced on March 13, 2013 by long-time supporters Rep. Howard Coble (R-NC) and Rep. Hank Johnson (D-GA), and referred to the House Judiciary Committee, where both lead sponsors have been veteran members. By direction of the Chairman, H.R. 1129 was heard in the House Judiciary Committee’s Subcommittee on Regulatory Reform, Commercial and Antitrust Law on April 29, 2014.

Join COST and more than 265 other companies and organizations in SUPPORT of a federal fix for nonresident state income tax withholding. Please contact Maureen Riehl for more information.