Small Business Research and Experimentation Simplification Act of 2009 - Amends the Internal Revenue Code to allow small business employers with an average of 500 or fewer employees in a calendar year a partially refundable tax credit for 20% of their research expenditures. Terminates such credit after 2015.
Requires the Comptroller General to report to Congress by June 30, 2015, on an analysis of the usefulness and effectiveness of any recommended changes in the research tax credit allowed by this Act.