Fake impact factors: the metrics that are real, and the ones that aren't

Open the homepage of many questionable journals and you will find, displayed with pride, an "impact factor" — often a precise-looking decimal, sometimes accompanied by a badge and a logo you have never seen before. It is one of the most effective tricks in the trade, because it borrows the vocabulary of genuine scholarship to reassure an anxious author. The problem is that many of these numbers are not independently verifiable or methodologically transparent. This guide, a companion to our complete guide to identifying a predatory or cloned journal, explains widely used journal metrics, how questionable metrics are marketed, and a source-tracing check that separates recognised records from unverified claims.

Why fake metrics exist

The demand is the whole story. In systems that reward publication in "high-impact" journals — for a degree, a promotion, a grant — the impact factor became shorthand for quality, and a shorthand that valuable is inevitably counterfeited. A journal that cannot earn a place in a recognised index can still pay a third party for an official-sounding metric to display, and to an author under pressure the distinction is invisible. The counterfeit metric is not a harmless vanity; it is a deliberate signal designed to convert your fear of choosing wrongly into a decision to submit.

The metrics that are real

Several widely used journal-level metrics are produced from major citation databases under published methodologies; their provenance and method are what make them independently checkable. The two you will encounter most are the Journal Impact Factor (JIF), published by Clarivate in its Journal Citation Reports and calculated from Web of Science data; and CiteScore, published by Elsevier and calculated from Scopus data. Both are computed and disclosed by the indexer itself, using a transparent, published method, for journals that have earned inclusion in the underlying index. Two further Scopus-derived metrics — SJR (SCImago Journal Rank) and SNIP (Source Normalized Impact per Paper) — are also legitimate and widely used, particularly for comparing journals across fields. The useful distinction is provenance: verify who calculates the metric, which data it uses, whether the method is published and whether the value appears in the source organisation’s own record.

How the manufactured ones work

Counterfeit metrics follow a recognisable design. A company with an impressive, authoritative-sounding name offers to evaluate a journal and assign it a numerical "factor" — for a fee. The journal pays, receives a certificate and a badge, and displays the number as though it were equivalent to the Clarivate Journal Impact Factor. The names are chosen to invite confusion: they frequently include the words "impact," "factor," "index," "global," "international" or "universal," arranged to echo the real thing closely enough that a hurried reader does not notice the difference. Some services list large numbers of journals, but their authority cannot be assumed unless the methodology, data source and governance can be independently checked. The metric is not a measurement — it is a product the journal purchased.

The one-line test

You do not need to memorise the names of the fakes, which change and multiply. You need one habit: trace the number to its source. If a journal claims an impact factor, ask whether that figure appears in Clarivate's Journal Citation Reports, or whether the journal has a CiteScore visible on Scopus. Both can be confirmed directly and freely — you can search the Web of Science Master Journal List and the Scopus sources page yourself. If the advertised number cannot be traced to Clarivate or to Scopus CiteScore, it is marketing, not measurement, and its presence — dressed up as a credential — is itself a red flag. A legitimate journal shows metrics you can verify at the indexer; a predatory one shows numbers you can only verify on its own homepage.

What the number does and doesn't tell you

Even when a metric is real, I counsel scholars against treating it as a verdict on their own work. A genuine impact factor or CiteScore describes the average citation behaviour of a journal, not the quality of any single article in it, and it varies so much between fields that comparing a number across disciplines is meaningless. In my own practice, I use recognised metrics only as one input — to sense a journal's standing in its field — alongside the questions that matter more: is the scope a genuine fit for the paper, is the peer review real and rigorous, and is the journal indexed where it claims to be. A real metric is useful context. An unverified metric is a material warning signal. Neither should ever be the whole basis for choosing where to publish.

A quick checklist

One: note any "impact factor," "index" or "factor" the journal advertises, and who issues it. Two: check whether the journal appears in Clarivate's Journal Citation Reports (via the Web of Science Master Journal List) or carries a CiteScore on Scopus. Three: if the advertised number is not traceable to Clarivate or Scopus, disregard it — and treat its prominent display as a warning about the journal. Four: never let any single number, real or fake, substitute for checking the journal's indexing, scope and peer-review integrity.

Not sure whether a journal's indexing claims hold up? Our free Journal Evidence Checker checks named sources and links you to the official records. Choosing the right, well-indexed journal for a specific paper is also part of what we do.

Verification sources: Clarivate Journal Citation Reports and the Web of Science Master Journal List; Elsevier CiteScore documentation; SCImago Journal Rank; and Think. Check. Submit. Accessed 4 August 2026. Verify the metric, year, category and source before relying on a journal-level number.