NSF Mandates Immediate Open Access for All Federally Funded Research in 2026

The National Science Foundation has enacted one of the most significant changes to research publishing in a generation: all publications resulting from NSF-funded research must now be made freely and immediately available to the public at the time of publication, with no embargo period.

The policy, detailed in Supplement 1 (NSF 26-200) and Supplement 2 (NSF 26-202), applies to all financial assistance awarded on or after January 22, 2026.

The 12-Month Embargo Is Gone

Previously, NSF-funded researchers could delay public access to their publications for up to 12 months after journal publication. That grace period has been eliminated. Authors must now submit their Author Accepted Manuscripts to the NSF Public Access Repository (NSF-PAR) no later than the date of publication.

The change aligns with the August 2022 OSTP memo directing all federal agencies to eliminate publication embargoes — but NSF is among the first major funders to fully implement the mandate with binding requirements.

New Data Sharing Requirements

Supplement 2 goes beyond publications. Research data supporting NSF-funded publications must now be shared at the time of publication, with Persistent Digital Identifiers (PIDs) and standardized metadata. This means datasets, code, and other supporting materials must be deposited in approved repositories and linked to the corresponding publications.

For researchers accustomed to treating data management plans as a compliance checkbox, the new requirements demand substantive engagement. Data must be genuinely accessible, not merely described.

What PIs and Institutions Must Do Now

Principal investigators with active or pending NSF awards should take three immediate steps:

1. Review updated Data Management and Sharing Plan requirements — NSF will require a streamlined DMSP format for all applications submitted on or after May 25, 2026
2. Register with NSF-PAR if not already enrolled, and establish workflows for immediate manuscript deposit
3. Negotiate with publishers — many journals now offer compliant green open access pathways, but researchers must verify that their publication agreements permit immediate deposit of accepted manuscripts

Institutional research offices should update their compliance guidance and training materials. The policy shift is not optional, and NSF has signaled that adherence will factor into annual project reporting. For a deeper look at how open access mandates affect grant compliance, visit grantedai.com.