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v2026.1714 entries · CC-BY 4.0
CASRAI
Dictionary termTrack EStablev2026.2

Plan U (Preprint)

A 2019 proposal that funders mandate deposit of preprints in approved preprint servers as a route to immediate open access, complementing Plan S.

ByCASRAI Editorial Board
· Last updated 21 May 2026

Examples

Worked examples

  • Is an instance

    A funder requires every grant-funded manuscript to be posted on a preprint server at submission.

  • Is an instance

    An institution rewards researchers for preprint deposit independently of the journal eventually selected.

Counter-examples

Looks similar, but isn't

  • Not an instance

    A funder accepts only published OA articles, providing no recognition for preprint deposit.

  • Not an instance

    An author posts a preprint after journal publication has already provided OA, defeating the rationale.

Editorial commentary

Plan U was proposed by Brian Nosek, John Inglis and Richard Sever in 2019. It argues that the simplest, lowest-cost route to immediate OA is to require funded researchers to post preprints in approved servers (bioRxiv, medRxiv, arXiv, SSRN) at or before journal submission. Unlike Plan S, Plan U does not constrain venue choice for the final published version; it ensures that an openly licensed manuscript exists from the moment research is shared. Several funders (Howard Hughes, Chan Zuckerberg Initiative, ASAPbio supporters) have moved in this direction.

References

  • Nosek BA, Inglis CJ, Sever R 'Plan U: Universal access to scientific and medical research via funder preprint mandates' PLOS Biology 2019.

Also known as

Plan U

Machine-readable encodings

Use in your systems

JATS XML <role> element
xml
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      vocab-identifier="https://casrai.org/dictionary/"
      vocab-term="Plan U (Preprint)"
      vocab-term-identifier="https://casrai.org/dictionary/term/plan-u-preprint" />
Schema.org DefinedTerm (JSON-LD)
json
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