PNAS 'Under Review': What Each Status Means and When to Expect a Decision

Before the paper reaches external reviewers, the assigned NAS Editorial Board member evaluates whether the scope-fit warrants PNAS's editorial slots. More than 50 percent of submissions are declined at initial evaluation. Direct Submissions with abstracts that read to the subfield rather than to a multidisciplinary audience get desk-screen rejection within 5 to 7 days. A desk rejection most often means the Editorial Board member concluded that the work would fit better at a more specialty journal or that the broad-significance bar is not met.

The PNAS editorial office confirms files are complete: manuscript with figures embedded, supplementary information separate, reporting checklists where applicable (ARRIVE for animal work, CONSORT for clinical trials, STROBE for observational studies), cover letter directed to the editor with disciplinary classification, conflict-of-interest declarations, ethics-statement documentation, IRB approvals, and data-availability statement.

The assigned NAS Editorial Board member reads the paper and evaluates broad-significance, scope-fit (does the abstract read to a multidisciplinary audience), and disciplinary routing across the 31 NAS disciplines. PNAS Direct Submissions face stricter scope-fit screening than NAS-member-track contributions; the editorial culture expects the abstract to communicate to a non-specialist.

Papers that pass the Editorial Board member screen are assigned to a member editor (an NAS member who serves as the active handling editor and oversees peer review) or, if the NAS membership lacks sufficient expertise, to a nonmember guest editor. The handling editor identifies and invites external reviewers with topic-matched expertise.

In parallel with the Editorial Board member's primary read, papers spanning multiple NAS disciplines may be discussed with peer Editorial Board members in adjacent disciplines. This cross-discipline consultation runs alongside the desk-screen and adds 3 to 7 days to the timeline that is invisible to the author in the portal, and explains part of the bimodal Direct Submission distribution.

PNAS member editors typically invite two reviewers (often a third for cross-disciplinary papers). The recruitment window can take 7 to 14 days because reviewers with topic-matched expertise are scarce. PNAS author guidelines confirm that research papers across all submission routes are peer-reviewed by at least two independent experts before any acceptance decision.

Once reviewers agree to review, the typical PNAS peer-review cycle lasts 2 to 6 weeks per reviewer, contributing to the 2.0-month Direct Submission median. Research papers across all submission routes are peer-reviewed by at least two independent experts. Reviewers are asked to evaluate broad-significance, scientific rigor, and reproducibility. Reviewer reports for PNAS tend to be focused; 1500 to 3000 word reports are typical given the multidisciplinary audience expectation.

After reports return, the member editor synthesizes them. The 2.0-month Direct Submission median first-decision time applies to papers that reach external peer review.

• Rejection within 1 to 5 days: Administrative issue or immediate scope mismatch.

• Rejection within 5 to 7 days: Editorial Board member desk rejection per the scope-fit screen.

• Still Under Review after 3 weeks: Strong signal. Paper passed the Editorial Board member filter.

• Still Under Review after 10 weeks: Reviewer-recruitment or reviewer-report delay. A polite inquiry via the eXtyles portal is appropriate.

• Status changes to "Decision Pending": Reports are in; expect a decision within 1 to 2 weeks.

This is the most common anxiety we hear from PNAS authors during the active editorial window. The honest answer: no, 6 weeks at Under Review puts you in the normal middle of PNAS's 2.0-month Direct Submission first-decision distribution. Reports may already be in editorial synthesis with the member editor preparing the recommendation.

Most reviewer-driven delays come from reviewer-recruitment timing rather than slow reviews because PNAS recruits topic-matched multidisciplinary reviewers who are scarce. If the portal still says Under Review at the 9-week mark, the most likely explanation is that one of the assigned reviewers asked for an extension and the member editor granted it, or that the bimodal distribution put your paper in the extended editorial-board-consultation tail.

This is normal practice at PNAS.

What you should NOT do during the 6-to-9-week window is email the editorial office. PNAS member editors are working academics fitting PNAS editorial work around their own research; an inquiry at 6 weeks adds friction without accelerating the timeline.

If your PNAS paper is rejected after review, the natural cascade depends on what the reviewers and member editor cited:

PNAS Nexus is the natural PNAS open-access cascade for broad-significance work where the open-access publishing model fits. PNAS Nexus is published by Oxford Academic for the National Academy of Sciences; the OUP submission portal at Oxford Academic author guidance handles submission.

Nature is the external cascade for top-tier broad-significance life-sciences work. Springer Nature operates independently from PNAS; reports do not transfer. The Nature Manuscript Tracking System at mts-nature.nature.com handles submission; nature@nature.com handles publisher-level inquiries.

Science is the external cascade for top-tier broad-significance general-science work. AAAS operates independently from PNAS; the AAAS Centralized Tracking System at cts.sciencemag.org handles submission.

eLife is a cascade option for life-sciences work where the Reviewed Preprint model fits.

Communications journals (Communications Biology, Communications Medicine) are Nature Portfolio open-access cascades.

PNAS asks reviewers to evaluate four things specifically. The table below maps each to actionable preparation.

Across PNAS-targeted manuscripts, three named patterns generate the most consistent reviewer concerns and the most common reasons papers miss the editorial bar or fail the desk screen.

The pattern is rarely "the result is not interesting." More often, the manuscript gives PNAS an interesting result but does not make the NAS Editorial Board member's job easy: the abstract does not translate the contribution for a broad readership, the methods package forces reviewers to infer key design choices, or the figures prove a subfield point without explaining why a multidisciplinary reader should care.

Subfield-only abstract flagged at desk screen. When the abstract reads to the immediate subfield rather than to a multidisciplinary NAS audience, PNAS Editorial Board member desk rejection within 5 to 7 days is common. We see this most often in manuscripts where the first paragraph names a pathway, material platform, organism, or data method before stating the general principle the result changes.

The stronger version keeps the technical terms, but makes the first sentence answer why a reader outside the specialty should keep reading. For PNAS, the abstract has to function as a routing document as much as a summary.

Check whether your PNAS abstract reads beyond the subfield →

Methods documentation gaps surface as reviewer requests. When methods documentation is thin, especially for specialized techniques, custom analysis pipelines, animal protocols, or single-cell sequencing workflows, PNAS reviewers consistently request expanded Methods or supplementary information before issuing a final decision. The strongest revisions add detailed methods documentation with reagent catalog numbers, code repositories, raw-data access, sample-size rationale, and exact statistical-test choices. In our PNAS-targeted reviews, this is the preventable issue that most often turns an otherwise strong paper into a major-revision decision.

Check if your PNAS methods package is review-ready →

Disciplinary routing flagged by Editorial Board member. When the disciplinary classification at submission is unclear or the work spans multiple NAS disciplines, the PNAS Editorial Board member may consult with peer Editorial Board members in adjacent disciplines, adding 5 to 14 days to the desk-screen window.

The strongest manuscripts pre-empt this by selecting a primary discipline that clearly fits the central contribution and by using the cover letter to explain why that discipline, rather than an adjacent NAS discipline, should own the review. This matters most for papers that combine computational methods, mechanistic biology, materials, climate, or social-science evidence.

Check your PNAS discipline routing before the editor sees it →

This guide tells you what PNAS editors look for while the manuscript is being routed or reviewed. The review tells you whether your paper passes that check before the decision arrives. We have reviewed manuscripts targeting PNAS and peer general-science venues; the named patterns above are the same ones Editorial Board members, member editors, and outside reviewers flag during first review. 60-day money-back guarantee. We do not train AI on your manuscript and delete it within 24 hours.

This page was created from PNAS's public editorial guidance at Pnas author instructions, PNAS reviewer guidelines documentation (NAS Editorial Board model across 31 disciplines, member editor + guest editor assignment, 50+ percent desk rejection rate, 2.0-month Direct Submission median, 3 to 4 week contributed-track median), SciRev community-reported transit data on PNAS, and Manusights pre-submission review experience with PNAS-targeted manuscripts.

Source limitation: PNAS public materials explain the NAS Editorial Board workflow, but they do not expose reviewer-invitation timing, member-editor notes, or why a particular paper sits in the portal. Official guidance covers the visible workflow; the added Manusights layer comes from the 100 most recent status-anxiety manuscripts our team reviewed across PNAS and adjacent general-science venues, where the strongest predictor of author confusion was whether the abstract, Methods, and disciplinary routing made the broad-significance case clear before the reviewer reports arrived.

For the general-science landscape beyond PNAS, see PNAS Nexus (NAS open-access cascade via OUP), external general-science alternatives (Nature, Science), eLife (Reviewed Preprint model), and Communications journals (Nature Portfolio open-access). The choice across these titles depends on whether the central contribution is broad-significance multidisciplinary (PNAS), NAS open-access broad-significance (PNAS Nexus), top-tier broad-significance (Nature, Science), Reviewed Preprint life-sciences (eLife), or Nature Portfolio open-access (Communications journals).

Reviewers at PNAS typically draw from 2 independent experts in the assigned NAS discipline. Editors screen and triage manuscripts before any reviewer sees them, and preparing a response template that addresses both broad-significance and methods-documentation perspectives accelerates revision rounds substantially.

For a pre-upload check of your manuscript against the PNAS multidisciplinary-broad-significance bar before submission, our PNAS pre-submission diagnostic flags the scope-fit and methods-documentation weaknesses most likely to surface in reviewer reports.