There is no universal acceptable percentage. Each Malaysian university — and often each faculty within it — sets its own similarity limit in its thesis or FYP handbook, and applies its own exclusions when running the check. Turnitin itself states, on its official product page, that the tool “does not determine whether plagiarism has occurred”. The only threshold that binds your submission is the one in your institution’s current guidelines, so that document — not this article, not your seniors’ group chat — is your first stop.
Why Is There No Single Official Number?
Because the similarity score was never designed to be a verdict. Turnitin describes its Similarity Report as a percentage of matching or similar text, provided so that educators can “make their own, informed judgment call”. The number is an input to a human decision, and institutions configure that decision differently: what percentage triggers review, which sections are excluded before counting, whether the limit applies to the whole thesis or per chapter, and who signs off the clearance letter before your viva can be scheduled.
That is why the figures you hear from friends at different universities genuinely differ — commonly somewhere in the 20–30% region for theses, sometimes stricter for postgraduate work — and why quoting any specific number here would mislead you. These are institutional policies that get revised; verify yours from the current handbook or your faculty’s postgraduate office, and note the year of the document you are reading.
What Actually Counts Toward the Percentage?
Turnitin compares your submission against a repository it describes as student papers, current and archived web pages, and premium publisher articles across 170 languages. Every stretch of text that matches any of that gets highlighted, regardless of whether the match is legitimate. In a normal thesis, plenty of it is legitimate:
- Properly quoted definitions with quotation marks and citations.
- Your reference list — entries are nearly identical across every thesis that cites the same sources.
- Standard terminology and instrument items: questionnaire scales, statistical test names, legal or medical phrasing that cannot be reworded.
- Methodology boilerplate that follows your faculty’s required structure.
This is exactly why institutions apply exclusions — many configure the check to ignore quotes, bibliography and small matches — and why two students can upload the same file under different settings and see different numbers. Before you panic about a score, find out which exclusions your faculty applies. And if your reference list is inflating your score because it is inconsistent, fixing the underlying habit matters more than the number: a well-managed library, whether in Mendeley, Zotero or EndNote, keeps legitimate matches clean and recognisable to the examiner.
Is a Very Low Score Automatically Safe?
No — and this is the half of the story most students never hear. The score only measures text matching. Taking someone’s ideas, structure or findings and rewording them without citation can produce a low percentage while still being plagiarism in every academic sense, because the substance is not yours and the source is not acknowledged. Examiners read for this; software does not have to catch it for it to end your viva badly.
A near-zero score on a full thesis is itself a signal worth worrying about. Academic writing legitimately matches existing text — definitions, citations, instrument items. A document with almost no matches often means aggressive machine paraphrasing was used to scrub it, which shifts the conversation from similarity to academic honesty, and modern tools flag manipulated text such as replaced or hidden characters. If a paraphrasing habit got you here, read about what AI detection actually sees before your next submission.
What Should You Do Before Your Official Check?
Three moves, in order of value. First, get the rules in writing: the current similarity limit for your level, the exclusions applied, how many attempts you are allowed, and who reviews borderline cases. Your faculty’s postgraduate office or supervisor can answer all four in one email, and the answer protects you far better than any rumoured number.
Second, read your matches, not your total. When you get a report — from any checker — classify each highlighted block: a cited quote (fine, check the formatting), a paraphrase missing its citation (add it now), or copied text you forgot to rework (rewrite from understanding and cite). Three different problems, three different fixes, one number that hides all of them.
Third, fix substance, never cosmetics. Add missing citations, convert long quotes into cited paraphrase, write more of your own analysis between sources. Do not touch character-substitution tricks or bulk machine paraphrasing: flagged manipulation converts an innocent formatting problem into evidence of intent, and the difference matters enormously to an integrity committee.
The distinction between an FYP, a thesis and a dissertation also matters here, because expectations of originality — and often the thresholds — scale with the level; see FYP vs thesis vs dissertation in Malaysia if you are unsure which rules apply to you.
How Do You Keep the Score Low Without Thinking About It?
Students with clean reports are rarely the ones who obsess over the checker; they are the ones whose writing process leaves a clean trail. Record the source the moment you use it. Mark quotes as quotes in your draft, not “later”. Paraphrase from understanding — close the paper, write, then verify — instead of shuffling words. Keep the in-text citations and the reference list synchronised from day one, so the only matches left in your report are the legitimate kind you can explain to any examiner in one sentence.
This is the workflow Tesify was built around: citations stay attached to their sources as you write and paraphrase, the bibliography stays in sync with the text automatically, and your writing history documents that the work is yours. The similarity check then becomes what it was always meant to be — a formality, not a final boss.
Write with a clean source trail from the first paragraph. Tesify keeps every citation connected and your reference list synchronised while you write — your thesis stays 100% written by you, with the evidence to show it. Used by 9,000+ students. Start writing in Tesify.
FAQ: Turnitin Similarity in Malaysia
What similarity percentage is acceptable in Turnitin?
There is no universal threshold. Each university, often each faculty, sets its own limit — commonly in the 20–30% region for theses — with its own exclusions. Check your current handbook or postgraduate office; that document is the only one that binds you.
Is the threshold the same for FYP, masters and PhD?
Usually not. Higher levels typically face stricter limits and stricter review, but this too is institutional policy rather than a national rule. Confirm the limit for your specific programme level.
Does a high similarity score mean I plagiarised?
Not by itself. Quotes, references, standard terminology and instrument items all raise the score legitimately. Turnitin states its tool does not determine whether plagiarism occurred — an examiner reads the report and judges each match.
Is a 0% similarity score good?
Suspiciously so, on a full thesis. Legitimate academic writing always matches something. Near-zero scores often indicate heavy machine paraphrasing, which raises integrity questions the score itself cannot answer.
Are quotes and references counted in my percentage?
Depends on your institution’s settings — many exclude quotes, bibliography and small matches, some do not. Ask which exclusions your faculty applies before interpreting any number.
Can I check my thesis before the official submission?
Usually yes, and you should — early, when there is still time for substantive fixes. Ask how many official attempts you are allowed, and treat any pre-check as a map of problems rather than a prediction of the official score.
Why did my score change between two checks of the same file?
Different settings, different exclusions, or a repository that has grown between checks — including newly indexed student papers. Scores are snapshots of a moving comparison, not fixed properties of your document.
What happens if I exceed the limit?
Typically you revise and resubmit before the clearance letter is issued; repeated or suspicious cases go to review. The process is your university’s, so ask for it in writing rather than assuming the worst — or the best.
How do I reduce my similarity safely?
Add missing citations, convert long quotations into cited paraphrase, and write more analysis in your own voice. Never use hidden characters or bulk machine paraphrasing — manipulation flags convert a formatting problem into an intent problem.
Who decides my case if the score is borderline?
A human: your supervisor, examiner or an integrity committee, following your university’s procedure. The report is evidence they read — which is why matches you can explain calmly are never the thing that sinks a viva.
My friend’s faculty allows a higher percentage — can I use their limit?
No. The limit that applies is the one in your own faculty’s current guidelines, and faculties within the same university can differ. When in doubt, ask your supervisor for the specific figure and the document it comes from, and keep that answer in writing.