Corporate Accountability Tax Gap Act of 2005

Corporate Accountability Tax Gap Act of 2005 - Amends the Internal Revenue Code to provide for public disclosure of certain information of publicly traded corporations, including: (1) net corporate income tax and taxable income as shown on the corporation's current year tax return; (2) adjusted book income; and (3) differences between taxable income and adjusted book income due to certain transactions, depreciation differences, stock options, and other factors.

Directs the Secretary of the Treasury to conduct a study of corporate tax shelter activity.