PLOS ONE Impact Factor

The 2.8 JIF tells you that PLOS ONE is a legitimate, indexed, high-volume open-access journal with modest average citation density. It does not tell you that the journal is low quality, and it does not tell you that acceptance is easy. The number is pulled down by volume, field diversity, and the journal's decision to review for technical soundness rather than expected novelty or prestige.

For authors, the practical use is positioning. If the paper is methodologically solid, open-data ready, and unlikely to clear a novelty-first journal, PLOS ONE can be a rational target even at 2.8. If the paper still has statistical, ethical, reporting, or repository gaps, the same 2.8 number will not make the submission easier. The costly mistake is treating the metric as a verdict on the paper. PLOS ONE's citation average is separate from the manuscript package reviewers will inspect, and that separation matters for target choice.

That 2.8 JIF is easy to misread. The number is compressed by journal volume and editorial model more than by paper quality alone. PLOS ONE publishes across many fields, does not filter for novelty, and therefore produces a lower average citation rate than more selective journals built around prestige signaling.

PLOS ONE's JIF has been far below its early peak of about 4.4 since the megajournal market matured. The 2021 bump to 3.7 was COVID-related, when PLOS ONE published heavily cited pandemic studies. The current 2.8 is up from 2.6, but it still represents the journal's low-2-to-3 baseline.

The decline reflects two structural factors: increasing competition from other megajournals (Scientific Reports, IEEE Access), and a deliberate editorial model that doesn't filter for "impact." PLOS ONE publishes everything that's technically sound, regardless of novelty. That's a feature, not a bug, but it produces a low average citation rate.

Exact historical category ranks should be checked inside Journal Citation Reports before being quoted in a CV, promotion packet, or grant appendix. For journal-selection work, the practical trajectory is that PLOS ONE remains a Q2 Multidisciplinary Sciences journal in the current JCR record after moving up from 2.6 to 2.8.

PLOS ONE's low JIF is mathematically inevitable given its editorial model. Here's why:

1. Volume dilution. PLOS ONE publishes 16,000+ papers per year. Even if 10% of those become highly cited (100+ citations), the other 90% pull the average down. In a journal that publishes 200 papers per year, every paper contributes meaningfully to the JIF. At 16,000 papers per year, most papers barely register.

2. No novelty filter. PLOS ONE doesn't ask "is this novel?" or "is this impactful?" It asks "is this technically sound?" That means confirmatory studies, null results, and incremental advances all get published. These are exactly the papers that receive fewer citations but are scientifically valid and useful.

3. Field diversity. PLOS ONE publishes across all sciences. Papers in high-citation fields (medicine, genetics) get cited more than papers in low-citation fields (ecology, paleontology, mathematics). The JIF averages across all fields, producing a number that doesn't represent any single field well.

4. Self-selection. Researchers with their most impactful work send it to higher-JIF journals. PLOS ONE often receives papers after rejection from more selective venues. This isn't a criticism - it's how the publishing ecosystem works. But it means PLOS ONE's paper pool skews toward work that's solid but not flashy.

PLOS ONE's editorial philosophy is unique among major journals. The evaluation criteria are explicitly limited to:

• Is the study well designed?

• Are the methods appropriate?

• Are the results supported by the data?

• Are the conclusions justified?

• Is the study ethical (human subjects, animal welfare)?

• Are data available for verification?

What's NOT evaluated:

• Novelty ("we've seen this before")

• Impact ("who would care about this?")

• Significance ("is this important enough?")

This model broke with convention when PLOS ONE launched in 2006. It challenged the assumption that journals should gatekeep for perceived importance. The result is a journal that publishes genuine scientific contributions that would be rejected elsewhere purely on "impact" grounds.

The practical consequence: PLOS reports a 31% acceptance rate in its 2024 metrics set. Rejections are driven by methodological, scope, reporting, ethics, and data-availability problems, not because editors think the topic is boring. If your methods are rigorous, your data are clean, and your conclusions follow from the evidence, you have a real chance at PLOS ONE regardless of the topic.

PLOS ONE's massive volume creates logistical challenges for review.

Typical timeline:

• Editorial screening: 1-2 weeks

• Reviewer assignment: can take 2-3 weeks (finding willing reviewers for 16,000+ papers is hard)

• External review: 3-6 weeks (2 reviewers)

• First decision: 6-10 weeks total

• Revision: one to two rounds

• Total submission to acceptance: 4-8 months

The bottleneck is reviewer recruitment. PLOS ONE editors request reviews from a larger number of potential reviewers to fill each slot, because the journal's volume means individual reviewers are asked frequently and often decline. Plan for this. If review seems delayed, a polite status inquiry to the editor after 8 weeks is reasonable.

PLOS ONE charges $2,477 for most research articles. All articles publish under CC BY, fully open access.

At $2,477, PLOS ONE is one of the most affordable Q2 OA journals. Compare this to Scientific Reports ($2,850), BMJ Open ($1,839), or Nature Communications ($7,350).

Fee waivers are available on a case-by-case basis. PLOS evaluates waiver requests based on financial need, not country of origin. The editorial decision is independent of ability to pay. Request waivers at submission, not after acceptance.

Submit if:

• Your study is methodologically sound but may not pass the "novelty" filter at other journals

• You have a confirmatory study, a null result, or an incremental advance that deserves publication

• You want affordable, fast open access with CC BY licensing

• You value open data policies and transparent science

• You need a publication in a PubMed-indexed, Web of Science-listed journal

• Your paper was rejected elsewhere on "impact" grounds, not methodological concerns

Think twice if:

• Impact factor matters for your career stage (2.8 may not meet institutional thresholds)

• You're in a field where Scientific Reports JIF 4.9 would serve the same purpose with a higher JIF

• Your paper is strong enough for field-specific journals with higher selectivity and citation rates

• You're concerned about the perception of PLOS ONE as a "dump journal" (this perception exists, fairly or not, at some institutions)

In our pre-submission review work with PLOS ONE manuscripts, three failure patterns create the most consistent rejection risk before the impact factor becomes useful. Each pattern is visible in the methods section, statistical analysis, data availability statement, reporting checklist, or abstract conclusion before upload.

PLOS ONE methods section too thin for soundness review. The most common misconception is that "soundness only" means "easy to get into." It does not. PLOS ONE editors are rigorous about methodology, statistical reporting, and data availability. We regularly flag manuscripts where the methods section is too thin to survive review: sample-size logic is missing, exclusion criteria are vague, controls are named but not described, or the statistical test does not match the study design. When significance is not being evaluated, methods become the main basis for the editorial decision.

PLOS ONE rejection carryover after a higher-tier review. Researchers who submit to PLOS ONE after rejection from a more selective journal often do not revise the manuscript deeply enough. If the previous journal's reviewers flagged statistical issues, missing controls, overclaiming in the abstract, or incomplete supplementary methods, those same issues will surface at PLOS ONE. The novelty filter is removed, but the rigor filter stays. The safest move is to map each prior reviewer comment to a specific manuscript change before retargeting.

PLOS ONE data-availability and conclusion mismatch. A technically reasonable study can still look unready when the data availability statement says "available on request," the repository link is absent, the code is not deposited, or the abstract conclusion outruns the actual figures and tables. PLOS ONE's broad scope does not protect a manuscript whose data, protocol, ethics statement, and conclusion language point in different directions. Reviewers tend to catch that mismatch because reproducibility is central to the journal's soundness promise.

That is why the 2.8 metric should come after the manuscript-readiness check, not before it. PLOS ONE can be a good target for a rigorous confirmatory study, null result, dataset paper, methods paper, or interdisciplinary analysis, but the abstract, methods, statistics, data availability statement, ethics statement, and supplementary files have to tell one coherent soundness story. If those components do not line up, choosing a lower-JIF venue will not fix the submission risk.

Before submitting, a PLOS ONE methods audit catches the statistical design, reporting-checklist, and data-availability gaps that cause rejection at a journal where methods are the main editorial criterion.

Whether a PLOS ONE paper helps your career depends entirely on context.

Where PLOS ONE works well:

• Building a publication record as a graduate student or postdoc

• Publishing secondary findings from larger projects

• Establishing a citable record for methods, datasets, or protocols

• Fields where impact factor is less emphasized (ecology, social science, education)

• Clinical departments that value publication count alongside quality

Where PLOS ONE may not be enough:

• Faculty job applications at R1 research universities in competitive biomedical fields

• Grant applications where reviewers weight journal prestige heavily

• Fields with strong field-specific journals that carry more weight (try PNAS, EMBO Journal, or field journals)

PLOS ONE at 2.8 is one of the most misunderstood JIFs in science. The h-index of 589 and 12 million citations tell you this is one of the most influential journals ever published. Individual papers here can be excellent and highly cited. The average is pulled down by volume and editorial philosophy, not by quality.

If your work is technically sound and you want it published, read, and citable in an indexed journal with genuine open access, PLOS ONE delivers. The APC is affordable, the review process is fair, and the journal's commitment to publishing science based on rigor rather than prestige is principled.

Know the trade-off: accessibility for your paper, but a 2.8 on your CV. For many researchers and many papers, that trade-off makes sense.

These numbers should be read together. A 2.8 JIF says the average citation rate is modest. The 16,621-article volume explains why the average is hard to move. The 31% acceptance rate and 40-day first-decision signal explain the author-facing trade-off: PLOS ONE is accessible, but not automatic, and the soundness package still has to be clean.

Representative PLOS ONE article DOI examples from the current archive include 10.1371/journal.pone.0337069, 10.1371/journal.pone.0328543, and 10.1371/journal.pone.0330625. Use examples like these to confirm the exact PLOS ONE article format and eISSN identity, not to infer that any single manuscript fits the journal.

PLOS ONE's JIF trajectory moved from 4.4 in its early peak to 2.6 in 2024, then up to 2.8 in the 2025 metric year. Here's what's actually happening:

1. Volume contraction. PLOS ONE publishes about half the papers it did at peak (2016). Clarivate's JIF calculation divides citations by citable items. Fewer papers means each paper's citation count matters more, but the total citation pool also shrinks.

1. Competition from newer mega-journals. Scientific Reports, Frontiers journals, and MDPI titles have pulled submissions and citations away from PLOS ONE. The pie got divided.

1. Normalization of the mega-journal model. When PLOS ONE launched in 2006, it was innovative. Now every publisher has a version. The novelty premium is gone.

1. JCR methodology changes. Clarivate's 2024 calculations changed how early-access articles are counted, affecting journals with long production pipelines.

Does it matter? For your career: maybe. Search committees at research-intensive universities notice the modest JIF. For your science: no. PLOS ONE papers are still indexed, citable, and discoverable. The soundness-only model means technically rigorous work that cannot clear a novelty bar elsewhere still finds a permanent, legitimate home.

Before submitting, a PLOS ONE tier check confirms whether this is the right venue or whether your paper could compete at a more selective journal.