US Federal Open Access Mandate: NIH, NSF, and Agency Requirements

The US federal government funds roughly $70 billion in research annually, and for decades most of that publicly financed science ended up behind paywalls accessible only to institutions that could afford journal subscriptions. A series of policy escalations — culminating in the August 2022 OSTP memo directing all major federal agencies to require immediate open access for funded research — fundamentally changed that equation. This page maps the structure of those mandates, how the NIH and NSF requirements work in practice, where the agency policies differ, and what the contested edges of this policy landscape look like.

Definition and scope
Core mechanics or structure
Causal relationships or drivers
Classification boundaries
Tradeoffs and tensions
Common misconceptions
Checklist or steps (non-advisory)
Reference table or matrix

Definition and scope

A federal open access mandate is a condition attached to public research funding that requires the resulting refereed publications — and, increasingly, the underlying data — to be made freely available to the public without embargo or subscription barrier. The mandate does not require that researchers abandon journal publication; it requires that an accepted manuscript version reach a designated repository within a defined timeframe.

The scope of US federal mandates expanded considerably after the 2022 OSTP Public Access Memo, which directed agencies with annual extramural research and development expenditures exceeding $100 million to update their public access plans by no later than the end of 2025, eliminating the 12-month embargo period that had been standard since the 2013 OSTP memorandum. The 2022 guidance covers not just publications but also research data, directing agencies to develop data sharing plans aligned with the FAIR principles (Findable, Accessible, Interoperable, Reusable) articulated by the National Academies of Sciences, Engineering, and Medicine.

Roughly 20 federal agencies collectively disburse the bulk of US research funding, including NIH, NSF, NASA, DOE, DOD, and USDA. Each agency implements the OSTP framework through its own policy instruments, creating a landscape that is unified in principle but varied in operational detail.

Core mechanics or structure

NIH Public Access Policy and the 2023 update. The NIH public access requirement has the longest institutional history of any major US mandate. Since 2008, NIH has required that refereed manuscripts arising from NIH funding be deposited in PubMed Central (PMC) within 12 months of publication. In response to the 2022 OSTP memo, NIH updated its policy effective January 25, 2025: the 12-month embargo is eliminated, and immediate public access is now required for all NIH-funded refereed articles (NIH Public Access Policy). The manuscript deposited must be the Author Accepted Manuscript (AAM) — the final refereed version before publisher formatting — or the Version of Record if the publisher permits it.

NSF Public Access Plan 2.0. The NSF Public Access Plan 2.0, released in 2023, requires that refereed publications resulting from NSF awards be made freely available immediately upon publication, with deposit in NSF's designated repository or an approved subject repository. NSF has also strengthened its data management and sharing requirements, requiring a two-page Data Management Plan with all proposals and mandating that data underlying published findings be publicly accessible concurrent with publication where practicable.

Repository infrastructure. The primary federal repositories are PMC for biomedical research and the NSF Public Access Repository (NSF-PAR) for NSF-funded work. Agencies including DOE use their own infrastructure — the DOE Office of Scientific and Technical Information (OSTI) manages the PAGES repository for DOE-funded publications. Acceptable subject repositories include discipline-specific archives such as arXiv, PsyArXiv, and the Social Science Research Network (SSRN), provided the repository meets agency-specified technical standards for metadata and persistent identifiers.

Causal relationships or drivers

The 2022 policy escalation did not emerge from nowhere. Three converging pressures drove it. First, the COVID-19 pandemic demonstrated at scale what happens when critical research is locked behind paywalls: the epidemiology and virology literature relevant to pandemic response was largely subscription-gated until publishers temporarily waived access, a workaround that required active lobbying from public health officials rather than being the default state. Second, the long-running academic critique of the subscription publishing model — documented in sources including the Scholarly Publishing and Academic Resources Coalition (SPARC) — gained political salience as journal subscription costs consumed an increasing share of university library budgets, with average journal subscription prices rising at rates that routinely outpaced general inflation. Third, the Biden administration's science policy agenda explicitly prioritized public benefit from federal R&D investment as a core principle, framing open access as a matter of equity rather than purely an efficiency argument.

The 2013 OSTP memo had established the 12-month embargo as a compromise that acknowledged publisher revenue concerns. Nine years of evidence from that policy — including data showing that NIH-deposited manuscripts were among the most-accessed content on PMC without measurable damage to journal subscription revenue — gave policymakers sufficient empirical ground to move toward zero embargo.

Classification boundaries

Not all federally funded research falls under the same open access obligation. Three boundary conditions matter.

Publication type. Mandates apply to refereed journal articles and, under the 2022 OSTP framework, to conference papers in some agency implementations. Book chapters, monographs, reports, and working papers are generally excluded, though agencies vary. The NIH mandate explicitly covers journal articles accepted for publication; it does not directly mandate open access to dissertations or technical reports funded through grants.

Funding threshold. The OSTP 2022 memo applies to agencies with extramural R&D expenditures above $100 million annually. Smaller agencies — the National Endowment for the Humanities (NEH), for example — operate under separate or less developed frameworks.

National security and sensitive data. Research classified for national security purposes is explicitly excluded. Sensitive data categories — including personally identifiable information, proprietary clinical data subject to IRB restrictions, and data involving tribal sovereignty considerations — may justify embargoes or restricted access to the data component of a mandate, even when the associated publication must be openly accessible. The NIH Genomic Data Sharing Policy, operating alongside the public access mandate, illustrates how these conditions can create parallel access tiers for the same funded project.

The distinction between the open access publishing model (author-pays article processing charges for immediate open access) and the federal mandate deposit requirement (deposit of accepted manuscript regardless of publisher model) is one of the most misunderstood classification boundaries in this space.

Tradeoffs and tensions

The zero-embargo requirement creates real friction with hybrid journal publishing models. Publishers that offer a "publish open access for a fee" option — typically charging article processing charges (APCs) ranging from $1,500 to over $11,000 depending on the journal — have argued that immediate open access requirements without APC payment effectively devalue their commercial offering. Several major publishers have responded by negotiating "transformative agreements" with institutions and funders, bundling subscription costs with open access publishing fees.

For researchers, the practical tension is that deposit obligations add administrative steps to the publication workflow. An investigator submitting to a subscription journal must verify that the journal's self-archiving policy permits AAM deposit, identify the correct repository, and submit the manuscript with appropriate metadata — a process complicated by the fact that publisher self-archiving policies are documented inconsistently, and the SHERPA/RoMEO database, while useful, lags policy updates.

There is also a legitimate equity concern running in the opposite direction from the access equity argument. Researchers at institutions without robust grant overhead — community colleges, regional universities, smaller international institutions — may lack the APC funding that allows gold open access publication. A mandate that requires open access but does not guarantee APC funding can inadvertently concentrate gold-route publication among well-resourced institutions. NIH addresses this partially through its NIH APC payment programs and funder-negotiated agreements, but the coverage is incomplete.

Common misconceptions

Misconception: Federal mandates require publishing in open access journals. They do not. The mandate requires that an accepted manuscript be deposited in a compliant repository. A researcher may publish in any refereed journal — including subscription journals — as long as the AAM reaches the designated repository within the required timeframe (now immediately for NIH and NSF).

Misconception: Copyright transfer to the journal prevents compliance. Publisher copyright agreements frequently include self-archiving rights for accepted manuscripts. NIH's policy explicitly states that grant award conditions supersede conflicting publisher agreements for NIH-funded work (NIH Public Access Policy FAQ). Researchers can assert manuscript deposit rights even when signing standard copyright transfer forms, provided the funding source is disclosed.

Misconception: The mandate applies uniformly across all agencies. As of 2024, agency implementation timelines and technical requirements vary. DOE, NASA, and USDA have published updated public access plans under the 2022 OSTP framework, but the specific repository systems, metadata standards, and data sharing requirements differ. The comprehensive reference on agency-level variation provides agency-by-agency detail.

Misconception: Preprint deposit satisfies the mandate. Preprints posted to arXiv or bioRxiv before formal expert evaluation are not equivalent to the AAM of a refereed article. Most agency mandates explicitly require the refereed accepted version, not the unreviewed preprint. The relationship between preprint servers and refereed journals is distinct from open access mandate compliance.

Checklist or steps (non-advisory)

The following steps reflect the compliance sequence for a refereed article arising from NIH or NSF funding, derived from NIH public access guidance and NSF PAR submission instructions:

Identify funding sources — Confirm which federal agency or agencies funded the work; multiple agency funding may trigger multiple compliance obligations.
Confirm journal self-archiving policy — Use SHERPA/RoMEO or the publisher's own policy page to determine AAM deposit permissions and any embargo conditions (note: agency mandates override embargo restrictions for covered grants).
Disclose NIH/federal funding in the manuscript — Include grant number(s) in the acknowledgment section; this creates the metadata link used to verify compliance.
Obtain the Author Accepted Manuscript — Secure the final refereed version prior to publisher typesetting; this is the file that must be deposited.
Deposit in the designated repository — For NIH: submit to PubMed Central via the NIHMS submission system or via journal-to-PMC partnerships. For NSF: submit to NSF-PAR. For DOE: submit to OSTI PAGES.
Record the repository identifier — Obtain the PMC ID (PMCID), NSF-PAR ID, or equivalent persistent identifier for grant reporting.
Include repository identifier in progress reports — NIH requires the PMCID in all progress reports, renewal applications, and new applications that cite the publication (NIH requirement).
Verify data sharing compliance separately — Publication deposit and data deposit are parallel obligations under the 2022 OSTP framework; completing one does not satisfy the other.

Reference table or matrix

Agency	Repository	Embargo (Post-2025)	APC Support	Data Mandate
NIH	PubMed Central	None (immediate)	Limited; transformative agreements	NIH Data Management and Sharing Policy (effective 2023)
NSF	NSF-PAR	None (immediate)	Not directly provided	Required Data Management Plan; concurrent data release where practicable
DOE	OSTI PAGES	None (immediate, per updated plan)	Not directly provided	DOE Public Access Plan data requirements
NASA	NASA Technical Reports Server	None (per updated plan)	Not directly provided	NASA data archiving requirements vary by mission
USDA	PubAg	None (per updated plan)	Not directly provided	USDA data management requirements by agency/program
DOD	Multiple (agency-dependent)	Plans under development per OSTP 2022	Not directly provided	Varies by branch and funding program

The broader landscape of open access publishing models, including diamond open access and institutional repository strategies, provides context for understanding where federal mandates sit within the full spectrum of access approaches. Readers tracking the scientific literature landscape across disciplines can orient through the subject overview at the site index.