Turnitin 5 min readJuly 22, 2026

What Is a Good Turnitin Similarity Score? (Percentages Explained)

Students obsess over the Turnitin similarity number. In reality, the percentage alone does not decide plagiarism — where the matches are and whether they are cited matters more. But there are useful benchmarks.

The commonly accepted thresholds

Most universities target below 15% overall similarity for coursework, below 20% for thesis chapters, and below 10% for journal submissions. Anything under 5% is excellent. Anything above 25% almost always requires review before you submit.

Why the percentage alone is not enough

A 30% score made entirely of properly quoted and cited passages is fine. A 12% score from one uncited paragraph is plagiarism. Turnitin marks the source, cite it correctly, or rewrite — either way the paper is safe.

What inflates similarity without being plagiarism

Direct quotes, reference lists, standard methodology sections, common phrases, tables of contents, and appendix contents all raise the number. Most Turnitin reports let your instructor exclude these; you can request the same filters on our reports.

How to bring your score down safely

Paraphrase in your own structure, not just synonyms. Add original analysis around every quoted idea. Cut unnecessary quotes. If you need help, our plagiarism removal service reduces similarity below your target.

FAQ

Is 20% too high?

For most undergraduate work, 20% is borderline. Under 15% is the safer target. Check your institution's rubric.

Is 0% possible?

Rarely — even original work matches common phrases and references. 1–5% is realistic for a truly original paper.

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