Income Equity Act of 2013- Amends the Internal Revenue Code to: (1) deny employers a tax deduction for payments of excessive compensation to any full-time employee (i.e., compensation for services exceeding the greater of 25 times the lowest compensation paid to any other employee or $500,000), and (2) require such employers to file a report with the Secretary of the Treasury on excessive compensation (as defined by this Act) paid to their employees. Defines "compensation" to include wages, salary, deferred compensation, retirement contributions, options, bonuses, property, and other forms of compensation.