The core programs in the Divisions of Integrative Organismal Systems (IOS) and Environmental Biology (DEB) now require the submission of preproposals and have only one application cycle per year. Preliminary proposals to these programs are due in January each year, with invited full proposals due in August. Both divisions limit investigators who serve as PI, co-PI, or lead senior investigator of a subaward to participating on no more than two preliminary proposals per year per division solicitation. According to the NSF FAQ released along with the solicitations, the Divisions expect the success rate of preliminary proposals to be "quite low." Therefore, PIs should treat these pre-proposals with the same attention as they would any other competitively reviewed full proposal.
More recently, some NSF programs have moved from two deadlines per year to one and some have changed their deadline dates (including Geography and Spatial Sciences, Biological Anthropology, Science, Technology, Engineering and Mathematics Talent Expansion Program).
OSP will monitor program solicitations and notify faculty as changes and new requirements emerge. PIs may also track NSF changes with the NSF Daily Digest e-mail which sends notices and updates to one’s inbox for the programs selected. Go to https://public.govdelivery.com/accounts/USN SF/subscriber/new?preferences=true#tab1 to sign up and set preferences. The NSF Fastlane home page also lists recently announced updates to funding opportunities: https://www.fastlane.nsf.gov/fastlane.jsp. Changes to a specific program can be found on that program’s web page, or on the NSF Publications page: http://www.nsf.gov/publications/ (select “Program Announcements and Information” in the Publication Type drop-down box).