IMPORTANT UPDATE: Effective 1 October 2025, SBIR/STTR program authorization has expired. New activity is paused; ongoing awards remain valid. Awardees are encouraged to contact their TPOCs and contracting officers with questions regarding active awards.
Phase III refers to work that derives from, extends, or completes an effort made under prior SBIR/STTR funding agreements, but is funded by sources other than the SBIR/STTR program. It includes any follow-on, non-SBIR/STTR funding for further specialized RDT&E or transition of technologies developed during the previous phases to government acquisition programs. Some federal agencies provide supplemental funding for further development of promising innovations when they demonstrate strong commercial potential or the capability to meet critical U.S. government technology needs.