How to Reduce Plagiarism in Thesis — Complete Guide 2026
Meet the Expert
Shruti Sharma
Academic Writing Coach & Plagiarism Reduction Specialist
- Helped 300+ PhD scholars reduce thesis plagiarism scores to meet UGC and university requirements
- Expert in paraphrasing techniques, citation practices, and Turnitin/Ouriginal report interpretation
- Trained in UGC plagiarism regulations and Indian university submission standards
Plagiarism in a PhD thesis is not always intentional — but it is always serious. Under UGC regulations, Indian universities are required to check all PhD theses for plagiarism before submission to Shodhganga. Most institutions require a similarity score below 10%. A high plagiarism score can delay or derail your PhD submission. The good news: with the right writing techniques and citation practices, you can significantly reduce plagiarism while maintaining academic rigour.
UGC Plagiarism Policy: What Indian PhD Scholars Must Know
| Similarity Level | UGC Classification | Consequence |
|---|---|---|
| Below 10% | Acceptable | Thesis can be submitted |
| 10% to 40% | Level 1 Plagiarism | Withdraw and resubmit with revised content |
| 40% to 60% | Level 2 Plagiarism | Suspension of registration for 1 semester; resubmit after revision |
| Above 60% | Level 3 Plagiarism | Registration cancelled; not eligible to reregister in same institution |
Note: Individual university policies may vary. Some allow up to 15% or 20%. Always check your university's specific plagiarism policy document.
What Plagiarism Checkers Detect (and What They Don't)
Understanding how Turnitin and similar tools work helps you address the right issues:
What Similarity Tools Check
Sentences or paragraphs that match the tool's database of published papers, websites, and previously submitted theses
Slightly paraphrased text where most words are the same or closely synonymous
Using someone's framework or argument without copying their words
Translating a source from another language (some tools now detect this)
12 Techniques to Reduce Plagiarism in Your Thesis
| # | Technique | How to Apply |
|---|---|---|
| 1 | Paraphrase properly | Change sentence structure completely, not just words; express the idea in your own voice |
| 2 | Synthesise multiple sources | Instead of paraphrasing one source, combine ideas from 3–4 sources in your own analysis |
| 3 | Cite everything | Cite the source even when you paraphrase — this shows attribution, not plagiarism |
| 4 | Use direct quotes sparingly | Only quote when the exact wording matters; always use quotation marks and cite |
| 5 | Write from memory | Read a source, close it, and write from memory — this naturally produces your own wording |
| 6 | Avoid patch writing | Do not replace a few words while keeping the sentence structure — this is still plagiarism |
| 7 | Keep a source log | Note every source as you read — prevents accidental uncited content later |
| 8 | Exclude references in Turnitin | Use the Turnitin settings to exclude reference lists and quoted blocks |
| 9 | Address self-plagiarism | If reusing your own previous work, disclose it clearly and cite yourself |
| 10 | Use a reference manager | Zotero, Mendeley, or EndNote ensure every source is tracked and cited correctly |
| 11 | Run Turnitin before final submission | Check your similarity score early so you have time to revise |
| 12 | Develop your own analytical voice | The more you critically engage with sources rather than describe them, the more original your writing |
Paraphrasing: Doing It Right
Original text: "Research suggests that transformational leadership positively influences organisational commitment among employees."
Weak paraphrase (still plagiarism): "Studies indicate that transformational leadership has a positive effect on employee organisational commitment." (Only words changed)
Strong paraphrase: "Employees whose leaders adopt a transformational approach — inspiring vision, encouraging innovation, and providing individualised support — tend to demonstrate higher levels of commitment to their organisations (Bass & Avolio, 1994)."
Sections That Commonly Have High Similarity Scores
- Literature review — if you have described many sources too closely
- Methodology chapter — standard methodology descriptions often match other theses
- Introduction — background context may use similar phrasing as field texts
- References list — always exclude this in your plagiarism check settings
- Statistical analysis results — standard reporting phrases (e.g., "was found to be significant at p < 0.05") match widely
Struggling with a high plagiarism score in your thesis? Thesis Ace Writers provides expert paraphrasing, restructuring, and plagiarism reduction services to help you meet UGC and university standards. Book your plagiarism reduction consultation today.
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Frequently Asked Questions
Click a question to expand the answer.
UGC (University Grants Commission) regulations (UGC-M.Phil./Ph.D. Amendment Rules, 2018) mandate that PhD theses must be checked for plagiarism before submission. Most Indian universities now accept a maximum similarity index of 10% (excluding references, bibliography, and standard phrases). Some universities allow up to 15% or 20%. Always check your specific university's plagiarism policy. The similarity score is typically checked using Urkund/Ouriginal, Turnitin, or PlagScan as required by the institution.
Plagiarism is using someone else's ideas, words, or data without proper attribution. Paraphrasing means rewriting source material in your own words while still citing the original author. Good paraphrasing changes both the words and the sentence structure substantially — not just replacing a few synonyms. If you paraphrase correctly and cite the source, it is not plagiarism. However, if your paraphrase is too close to the original text, it may still be flagged as plagiarism even with a citation.
Self-plagiarism (also called text recycling) occurs when you reuse your own previously published or submitted work without proper disclosure. In a PhD thesis, this includes copying sections from your own published papers, conference papers, or previous academic submissions without acknowledging them. To avoid self-plagiarism: cite your own previous work as you would cite others; clearly state when thesis chapters build on your previously published papers (many universities allow this with proper disclosure); do not submit the same literature review or methodology section that you submitted to another degree programme.
Common reasons include: (1) too-close paraphrasing — only synonyms changed, not sentence structure; (2) standard academic phrases that match widely-used terminology in the field; (3) your own previously submitted work matching your current submission; (4) quotations (which should be properly formatted and may be excludable); (5) reference list matches — most tools allow you to exclude references. If your similarity is still high after correct paraphrasing, try rewriting full paragraphs in a completely new sentence structure, synthesising multiple sources instead of following one source closely, and using Turnitin's similarity report to locate specific matches.
Yes — unintentional plagiarism is common among PhD scholars and includes: copying text you had saved in notes without noting its source; inadequate paraphrasing (patch writing); forgetting to add citations to ideas you absorbed from reading; including data or figures from other papers without proper attribution; and cultural differences in academic writing norms (some educational traditions emphasise reproducing authority rather than synthesising). Universities increasingly recognise unintentional plagiarism as a serious issue but typically treat it less severely than deliberate plagiarism — though consequences can still be significant.