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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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COST 's 2016 Scorecard on State Tax Appeals and Procedural Requirements

COST Issues 6th Scorecard which continues to apply objective criteria to evaluate independence in tax appeals systems and key procedural elements that impact taxpayers’ perceptions of fairness and efficiency.

Click here to view the study.  


Study: Total State and Local Business Taxes (FY15)

Businesses paid more than $707.5 billion in state and local taxes in FY2015, an increase of 1.9% from FY2014.  Click here for state-by-state and industry details of business taxes.


2017 COST Calendar of Events

The complete 2017 COST Calendar of National Conferences and Schools is available! 

• Mark Your Calendar • Invite Your Colleagues •

Click Here For More Information. 


Update on Mobile Workforce State Income Tax Simplification Act

We are pleased to announce that on September 21, 2016, the U.S. House of Representatives passed H.R. 2315, the Mobile Workforce State Income Tax Simplification Act, by voice vote. H.R. 2315 has 181 bipartisan cosponsors, and the 308-member Mobile Workforce Coalition is now focusing lobbying efforts to the Senate where companion legislation S. 386 is pending action in the Senate Finance Committee with 47 cosponsors.  For more information or to join the Mobile Workforce coalition efforts, please contact  Douglas Lindholm or click here.