Key takeaways
- There is no universal 'good' score—each university sets its own threshold.
- A low percentage with uncited matches is worse than a higher score with proper attribution.
- Context matters: literature reviews and method sections naturally run higher.
Students often ask what Turnitin score is 'safe' for a thesis. The honest answer is that no single number applies everywhere. Universities set their own thresholds, and supervisors interpret reports with context that the percentage alone cannot capture.
Typical university thresholds
Many institutions treat anything below 15% as acceptable, 15–25% as requiring review, and above 25% as a serious concern. Some departments are stricter for certain chapters. Check your handbook before assuming a universal rule.
Why a low score can still be problematic
A 5% report with several uncited verbatim passages is more serious than a 20% report where every match is properly quoted and referenced. Turnitin counts text, not intent.
Sections that naturally run higher
- Literature reviews summarising published work.
- Methodology chapters using standard procedures.
- Reference lists and bibliographies.
- Definitions and legal or technical terminology.
How to read your similarity report
Click each highlighted match. Note the source, whether you cited it, and whether the overlap is a quote, a paraphrase, or an unattributed copy. Focus your effort on uncited matches in your own prose.
When to worry and when to relax
Worry when large blocks of your writing match sources you never cited. Relax when matches come from your bibliography, properly quoted definitions, or widely used methodological language—provided attribution is correct.