Full Funding for IDEA Now Act of 2005 - Amends the Individuals with Disabilities Education Act (IDEA), as amended by the Individuals with Disabilities Education Improvement Act of 2004 (Public Law 108-446), to set forth a mandatory minimum level of Federal grant payments to States for assistance for education of all children with disabilities under IDEA part B.
Entitles a State to receive such a minimum grant allotment in an amount determined by current formulas for maximum authorization levels in specified fiscal years (which such minimum entitlement replaces).
Eliminates the current authorization of appropriations for specified fiscal years for such grants.