Last Updated on July 16, 2026 by Dr. Bhagat
Journal Metrics·Updated June 2026
Journal Self-Citation and the Self-Citation Ratio: What Researchers Should Know
How some journals artificially inflate their Impact Factor — and the suppression rules Clarivate uses to stop them.
DefinitionWhat journal self-citations are
A journal self-citation occurs when an article published in one journal cites another article previously published in that same journal. This is distinct from author self-citations, where a researcher cites their own prior work.
In specialized fields, some self-citation is natural. Researchers build on prior work published in the same outlet. But when journals systematically encourage or engineer excessive internal citations, they artificially boost their Impact Factor.
MethodHow the self-citation ratio is calculated
The self-citation ratio is calculated as: self-citations ÷ total citations received by the journal in a given JCR year. A ratio of 15% means 15% of all citations to the journal came from its own articles.
There is no universal “safe” threshold. However, Clarivate monitors journals where the ratio appears disproportionately high relative to the category average. Journals with ratios exceeding 30–40% are frequently flagged for investigation.
Journals that publish editorial directives encouraging authors to cite previous articles from the same journal, or that require a minimum number of “internal references,” may be manipulating their self-citation ratio. Always verify editorial policies before submitting.
EnforcementClarivate’s suppression policy
Clarivate Analytics, which publishes the Journal Citation Reports (JCR), has implemented a suppression policy for journals with excessive self-citations. If a journal’s self-citation ratio is deemed artificially inflated, it is suppressed from the JCR for one or more years.
During suppression, the journal does not receive an Impact Factor. This is a significant penalty, as many institutions and funding agencies require JCR-indexed journals for publication credit.
ContextHow much self-citation is normal?
Self-citation rates vary significantly by field. Review journals in narrow specialties may naturally have higher rates because the journal dominates its niche. A 10–20% self-citation ratio is common in many fields.
The key distinction is organic vs. engineered self-citation. Organic self-citation reflects genuine scholarly continuity. Engineered self-citation is a manipulation tactic designed to inflate metrics.
| Self-citation ratio | Typical interpretation |
|---|---|
| < 10% | Low; typical for broad, multidisciplinary journals |
| 10–25% | Normal for specialized subject journals |
| 25–40% | Elevated; warrants scrutiny |
| > 40% | High risk of suppression by Clarivate |
Source: Journal Citation Reports 2025 (Clarivate); thresholds are approximate guidelines, not official cutoffs.
Key Takeaways
- Journal self-citations are legitimate when organic, but dangerous when engineered.
- The self-citation ratio = self-citations ÷ total citations.
- Clarivate suppresses journals with excessive self-citation from JCR.
- Specialized journals naturally have higher ratios; context matters.
- Always verify a journal’s editorial policy on citation requirements.
FAQPeople also ask
What is a good self-citation ratio for a journal?
There is no universal threshold. Below 10% is typical for multidisciplinary journals; 10–25% is normal for specialized fields. Ratios above 30–40% attract scrutiny from Clarivate.
Does Clarivate ban journals for self-citation?
Clarivate does not permanently ban journals, but it suppresses them from the JCR for one or more years if self-citation is deemed excessive. The journal can be reinstated after the ratio normalizes.
How can I check a journal’s self-citation ratio?
Look up the journal in the Journal Citation Reports (JCR). The self-citation data appears in the journal profile, usually alongside the Impact Factor.
Are author self-citations the same as journal self-citations?
No. Author self-citations occur when a researcher cites their own work, regardless of where it was published. Journal self-citations occur when an article in Journal A cites another article in Journal A.
Can self-citation ever be legitimate?
Yes. In specialized fields, researchers naturally build on prior work published in the same journal. The problem is artificial inflation, where journals force or incentivize unnecessary internal citations.
SourcesReferences & further reading
- Journal Citation Reports (JCR) — Official source for self-citation data and suppression lists.
- Clarivate Analytics — Publisher of JCR and Web of Science.
- Web of Science Master Journal List — Verify journal indexing status.
