cost membership

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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.


featured news

State Tax Notes Names COST 'Organization of the Year'

This week's issue of Tax Analysts' State Tax Notes names COST "Organization of the Year" for 2014.  Click here for the full story.


2015 Property Tax Workshop

January 20 - 22, 2015
Westin Galleria
Dallas, Texas
Click Here For More Information 

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Early Registration
Discount Deadline
December 31, 2014
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2015 SALT Basics School

January 25 - 30, 2015
Georgia Tech Hotel & Conference Center
Atlanta, Georgia 
Click Here For More Information 

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.