What is a Phase II Add-On program?
Some SBIR agencies (e.g., NSF) offer the opportunity for a Phase II winner to obtain additional SBIR money from the Phase II set-aside by submitting a brief proposal that covers the next stage of R&D work (focused on successful commercialization) and that includes significant outside matching funds (often more than the government provides at this stage). You need to refer to each solicitation or talk with your SBIR program manager to determine how this initiative works within the participating agencies.