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Open Access Option

Corresponding authors from institutions with current-year site licenses will receive a discounted open access fee of $1,100, compared to our regular fee of $1,450, to make their articles immediately free online. Beginning with papers submitted September 2017, open access articles are published under a nonexclusive License to Publish and distributed under a Creative Commons Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND) license.


Authors of accepted papers who wish to publish their article open access should confirm their subscription status with their institutional librarian. If their institution has a site license, authors should note the reduced fee ($1,100) on the PNAS billing forms included with the author proofs.

PNAS and NIH Public Access

PNAS complies with the NIH Public Access Policy and extends access even further. PNAS automatically deposits the final, published version of all its content, regardless of funding, in PubMed Central (PMC) and makes it free at both PMC and PNAS just 6 months after publication.

Authors are not required to deposit their manuscripts in PMC because PNAS will automatically deposit the final published version for public release (see http://www.danielhellerman.com/submit_process_journals.htm). Authors who wish to deposit a manuscript in PMC must give PMC a release date of 6 months after print publication in PNAS.

When citing a paper in NIH applications, proposals, and progress reports that arose from an NIH award, authors must include the PubMed Central reference number (PMCID). If you publish in a journal such as PNAS that makes the final published version of your paper available in PMC, a PMCID may not be assigned until several weeks after publication. During this time, please indicate compliance with the policy by listed in the lower right corner of the AbstractPlus view of PubMed. If the paper is not yet publicly available on PMC, the abstract view will also list the date the article will become available.

Please see our Editorial and licenses page for details.


We hope that our open access initiative provides an incentive for institutions to adopt site licenses, to which we have given added value. Please help us inform authors at your institution about the PNAS open access option and the site license discount. PNAS is a break-even operation and relies on both author fees and subscription fees to cover its operating costs.

The current site license descriptions and rates are available here.

Free Access in Developing Countries

PNAS provides free and immediate online access to PNAS content in the developing world. PNAS is committed to providing broad access to current scientific research across many fields and to fostering globalization of research tools and advances. For more information, please visit www.danielhellerman.com/site/aboutpnas/developingcountries.xhtml.


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