Last updated: 07 October 2026
The journal impact factor (JIF) is a Clarivate metric showing how often a journal's recent articles are cited. It equals the citations received in one year to items published in the previous two years, divided by the number of citable items published in those two years. It describes the journal, not any single paper.
For a PhD scholar choosing where to send a manuscript, the journal impact factor is usually the first number met, and one of the most misunderstood. This guide explains the meaning of journal impact factor, the exact formula, how to check and find it safely, what counts as a good score in your field, and how to use it without being misled by fake metrics.
Four points to remember before you use a journal impact factor to shortlist a journal.
The official JIF comes only from Clarivate's Journal Citation Reports (JCR).
The June 2026 release reports 2025 data, so it is the "2026 impact factor" people search for.
Clarivate may update some JCR 2026 figures later in the year. Check the live journal profile before quoting a number in a thesis or application.
"Good" is relative: compare rank and quartile inside the subject category.
Global Impact Factor, Universal Impact Factor and similar names are not Clarivate products.
Journal impact factor is an average of citations at the journal level. It tells you how frequently a journal's recent content is cited in a given year, which makes it a rough indicator of how visible the journal is within its field.
Eugene Garfield proposed citation indexing in the 1950s; the Institute for Scientific Information, which he founded in 1960, later developed the impact factor. The first Journal Citation Reports appeared in 1975. The product is now owned by Clarivate, which also runs Web of Science. Librarians first used it to choose subscriptions; authors and universities later adopted it as a shortcut for prestige.
The scale is large. Clarivate's JCR 2026, released on 17 June 2026, includes metrics for 22,643 journals across 254 categories, and 521 journals received a Journal Impact Factor for the first time. A research journal impact factor exists only if the journal passed Clarivate's selection process; no JCR entry means no official JIF.
Keep one caveat in mind: the JIF is an average over a skewed distribution, and it says nothing about the quality of your own paper. See the limitations below.
The Journal Impact Factor (JIF) formula is:
For example, the 2026 JCR release uses 2025 citation data. Therefore, the JIF reported in the 2026 release is based on citations received in 2025 to items published in 2023 and 2024.
The June 2026 JCR release uses 2025 citation data.
Count the eligible citations received in 2025 to items published by the journal in 2023 and 2024.
Count the citable scholarly items published in 2023 and 2024. These include articles, reviews and proceedings papers.
Divide the numerator by the denominator to obtain the Journal Impact Factor. Clarivate reports JIF values to one decimal place.
Imagine a journal that published 120 articles in 2023 and 130 in 2024, so 250 citable items. During 2025, those items were cited 900 times. The impact factor is 900 ÷ 250 = 3.6. This example is invented to show the arithmetic; it is not a real journal.
You can estimate the impact factor of a journal from Scopus or Google Scholar data, but it will differ from Clarivate's figure, which relies on Web of Science's citation database, its definition of "citable" and its data corrections.
Since the 2023 release, citations to retracted items are no longer counted in the numerator, although those items still count among the citable items in the denominator. Never quote a self-calculated number as the official JIF.
Because the window is only two years, slow-citing fields such as mathematics or parts of the humanities are disadvantaged. Clarivate therefore also publishes a 5-year impact factor, which suits those disciplines.
To check a journal impact factor, search the journal's ISSN in Clarivate's Journal Citation Reports, confirm the year of the release, and read the figure from the journal profile page. Never rely only on a number printed on the journal's own website.
A JIF does not prove a journal is SCI-indexed. Clarivate now publishes impact factors for journals in the Emerging Sources Citation Index (ESCI) and the Arts & Humanities Citation Index (AHCI), as well as SCIE and SSCI. If your university requires an SCI or SCIE journal, a JIF alone is not enough. Open the journal in the Master Journal List and confirm which edition it appears in.
Enter the title or ISSN at scimagojr.com to see the SJR indicator and quartile for Scopus-indexed journals. It is related to, but not the same as, the Clarivate figure, so label it SJR.
Journals often show metrics on an "About" page, but they may display their best year or an outdated figure. Use it only to cross-check JCR. Publishers such as Annual Reviews publish full ranking tables, which signals transparency.
Inside JCR you can browse a journal impact factor list by category and sort it to see the ranking. Be careful with free PDFs titled "impact factor list 2026": they are often outdated or copied with errors. Verify the exact title and ISSN in JCR.
Fake metrics usually travel with other warning signs — unsolicited emails promising fast acceptance, and a peer review process described in vague terms. Those are publisher behaviours rather than metric problems: how to identify predatory journals covers them in full.
A journal quoting one of these holds no Clarivate impact factor. Other red flags: an impact factor shown without a year, a figure missing from JCR, unsolicited emails promising fast acceptance, and vague peer-review descriptions. If several appear together, step away.
Our team can verify a journal's indexing and quartile before you commit.
Start Journal Publication Support →A good impact factor is one that places the journal in the top quartile (Q1) of its subject category. Because citation habits differ across disciplines, the same number can be excellent in one field and ordinary in another.
Rules of thumb such as "above 3 is good" are only a starting point. The table below uses Annual Reviews' published 2026 JCR rankings. They are review journals from one publisher, so treat them purely as an illustration of how numbers behave across fields.
| Annual Review of | JIF | JCR Category | Rank | Position |
|---|---|---|---|---|
| Law and Social Science | 3.2 | Law | 16 of 443 | Top 4% (Q1) |
| Anthropology | 4.0 | Anthropology | 3 of 143 | Top 3% (Q1) |
| Financial Economics | 4.1 | Business, Finance | 44 of 243 | Top 18% (Q1) |
| Cancer Biology | 5.5 | Oncology | 76 of 333 | Top 23% (Q1) |
| Biochemistry | 24.9 | Biochemistry and Molecular Biology | 6 of 328 | Top 2% (Q1) |
Source: Annual Reviews, Journal Impact Factors (JCR 2026) . Percentages are our calculation from rank and category size.
Look at the first and fourth rows. A 3.2 in law is a stronger position than a 5.5 in oncology, even though the oncology number is higher. That is the whole idea of quartiles: Q1 is the top 25% of journals in a category by impact factor, Q2 the next 25%, and so on.
Often yes in social sciences, education, management and several engineering categories, where Q1 thresholds sit lower. In fast-citing biomedical areas it can be mid-table.
The answer is the same: check the category quartile. A 3.7 that is Q1 in your subject is a strong target for most doctoral work.
It is above what most journals achieve, but still verify rank. As the table shows, 5.5 can sit near the Q1 boundary in a large biomedical category.
Journals with a high impact factor are mostly review series and broad flagship titles. In the 2026 release, Annual Reviews titles range from 3.2 to 55.9 (Organizational Psychology and Organizational Behavior), with Psychology at 41.8 and Immunology at 39.8. Review articles attract many citations, but review journals rarely accept original data papers, so a high figure there may not help your submission. Therefore, a very high impact factor may not make a journal suitable for your particular submission.
Searches for the journal impact factor Scientific Reports are very common.
The journal publishes tens of thousands of papers a year and selects on soundness rather than novelty. Scientific Reports has a Journal Impact Factor of 4.9 for 2025, according to the 2025 Journal Citation Reports (JCR) released in 2026. This is a useful real-world example of why the current JIF should be checked rather than described only as “mid-single digits.” Compare the journal’s JIF with other journals in the same subject category and consider its quartile before using the metric to shortlist a journal.
The journal impact factor is not the only journal metric. CiteScore, SJR, SNIP and the Journal Citation Indicator use different databases, windows and normalization, so values cannot be compared across them.
| Metric | Provider & Database | What It Measures | Best Used For |
|---|---|---|---|
| Journal Impact Factor JIF |
Clarivate Web of Science |
Citations to the previous two years of content | Standard benchmark for SCI/SSCI journals |
| Journal Citation Indicator JCI | Clarivate | Field-normalized impact, where 1.0 is the world average | Comparing journals across subjects |
| CiteScore |
Elsevier Scopus |
Citations over a four-year window to a wider set of document types | Scopus-indexed journals |
| SJR |
SCImago Scopus data |
Citations weighted by the prestige of the citing journal | Free quartile lookup |
| SNIP | Scopus | Citations normalized by field citation behavior | Cross-field comparison |
In practice, check the JIF if the journal is in Web of Science and CiteScore or SJR if it is in Scopus. Rules differ by university, so read your own PhD regulations before shortlisting.
The main limitation is that the journal impact factor is an average, and citations within a journal are highly uneven. A few popular papers usually drive most of the score.
Research by Brembs and colleagues, titled "Deep Impact: Unintended consequences of journal rank" , argues that using journal rank to assess individual work is poor practice.
Citation speed and volume differ widely across disciplines.
Clarivate suppresses journals from JCR when figures look distorted, so the metric can be gamed.
Slow-burning papers and practitioner-focused journals are undercounted.
The San Francisco Declaration on Research Assessment (DORA) recommends against using journal-based metrics to judge individual research. Committees still glance at the journal, so the number matters in practice, but your paper's rigor matters more.
Use the impact factor to build a shortlist, then choose the journal by scope fit, indexing, review speed and credibility. A well-matched Q2 journal usually beats a poorly matched Q1 journal that rejects the manuscript after months of waiting.
Does your university or funder require SCI, SCIE, SSCI, Scopus, or Web of Science indexing? Note it first.
Read recent issues and check that similar methods and topics appear.
Confirm in the Master Journal List or Scopus Sources by ISSN.
Aim for Q1 or Q2 in your category. The quartile comes from the journal's rank within its own JCR category, not from the impact factor on its own — see Q1, Q2, Q3 and Q4 journals explained.
Check time to first decision and any article processing charge.
Check the editorial board, peer review process and metric claims.
Rank three to five journals in order so a rejection does not stall your timeline.
Matching a manuscript to a journal is where many scholars lose months. Zonduo has supported PhD scholars since 2020, with journal publication support that covers shortlisting, manuscript preparation, formatting, submission guidance and help responding to reviewers. Our team can verify a journal's indexing and quartile before you commit, so you do not submit to a title that fails your university's rules.
Acceptance is decided by independent peer reviewers, so no service can guarantee it, and we never sell or alter impact factors. We improve your fit, preparation and process. Check your institution's policy on external support.
Share your requirements and our team will help you identify suitable journal options.
Journal impact factor is a Clarivate metric showing the average number of citations received in a given year by items a journal published in the previous two years. It is reported in Journal Citation Reports and describes the journal, not any single article or author.
Divide the citations a journal received in the target year to its items from the previous two years by the number of citable items (articles and reviews) it published in those two years. A 2025 impact factor uses 2025 citations to 2023 and 2024 content.
Search the journal title or ISSN in Clarivate's Journal Citation Reports, usually through your library. Confirm Web of Science coverage in the Master Journal List. SCImago shows SJR and quartile for free, but that is a different metric.
It depends on the subject category. Compare the journal's rank within its category: Q1 means the top 25 percent. A 3.2 can be elite in law while a 5.5 sits lower in oncology.
Often yes, but only relative to the field. In many social science and humanities categories 3.7 is Q1, while in fast-citing biomedical fields it may be mid-table. Check the category rank and quartile.
A 5.0 is above the level of most journals in many categories, but quality depends on rank within the subject category, not the raw number.
Review journals and broad flagship journals in medicine, life sciences and physics usually score highest. Annual Reviews titles in the 2026 release range from 3.2 in law to 55.9 in organizational psychology.
