Plagiarism Percentage in Kenyan Universities: 7 Strict Limits, Checked Against Policy

The plagiarism percentage Kenyan universities accept on a thesis ranges from 15% to just under 30%, and the figure that applies to you depends on which policy your graduate school follows. We read the policy documents of seven universities, and the limits below come from those documents rather than from what students repeat to each other.

One term first. The similarity index is the share of your document that matches text already in a checker's database, such as published papers, websites and earlier student submissions. It is not a verdict of plagiarism. A properly quoted and cited passage still counts towards it, which is why every policy here sets a ceiling rather than demanding zero.

What is the plagiarism percentage at each Kenyan university?

• Kenyatta University: no more than 16% overall and no more than 1% from any single source, under its 2020 Anti-Plagiarism Policy. Anything below 6% is rejected. The library's notice of the revised policy quotes the rule. An older 2017 version allowed under 25%, which is where the "24% is fine" advice still circulating comes from.
• Maseno University: 15% is acceptable, 16 to 29% is sent back for revision and resubmission, and 30% or more is unacceptable, under its 2018 Anti-Plagiarism Policy.
• University of Nairobi: Turnitin is the library's preferred checker. Its 2013 Plagiarism Policy sets no percentage, but the engineering departments require a similarity index below 15% (14% and below) at proposal and thesis stage, per the Civil and Construction Engineering submission rules.
• Strathmore University: a general limit of less than 25% excluding references, set in the 2022 research guide, with each school free to set its own level for its subject.
• KCA University: no more than 25%, applied at both the proposal and the dissertation stage, under the Board of Postgraduate Studies submission requirements.
• Moi University: below 30%, excluding the bibliography, under the 2019 postgraduate rules. One centre within Moi uses 25% for its own anti-plagiarism certificate.
• Daystar University: no published thesis figure, but its Ethics Review Board asks students to revise any proposal above 20% before accepting it.

The spread matters if you move between institutions or follow advice from a friend at another one. A draft at 22% clears Strathmore and Moi, goes back for revision at Maseno, and fails Kenyatta and UoN's engineering departments outright.

Which plagiarism checker does your university use?

Turnitin is named in the documents of Nairobi, Kenyatta, Moi, KCA and Daystar, and Strathmore's 2026 handbook asks for "Turnitin or equivalent". USIU-Africa's academic catalogue names SafeAssign, the checker built into Blackboard. Maseno's policy only says "University approved plagiarism detection software". Two checkers rarely give the same number for the same document, because they search different databases.

Who runs the check, and when

Most theses are checked more than once. At Kenyatta your supervisor runs the draft through Turnitin, and the Graduate School will not table a thesis without a Plagiarism Clearance Certificate. At Moi the supervisor checks at proposal, drafting and pre-examination stages, then the chair of the School's Graduate Studies Committee runs the formal check. At Maseno the University Librarian runs it and reports within two weeks. Strathmore expects the student to attach the similarity report to the proposal and again before the defence.

Does the plagiarism percentage include AI detection?

No. Turnitin's AI-writing indicator is a separate report from the similarity report. The libraries at Egerton (August 2025) and Nairobi (September 2026) have both run training on the AI report, so it is in use. Only one rule we found sets a limit: UoN's Civil and Construction Engineering department says AI-generated or AI-assisted text "must not exceed 20%" of a thesis or proposal, and documents above it "will not be processed". It does not say which detector measures that.

We found no published university-wide generative-AI policy at any of these universities. JKUAT discussed a draft AI policy with stakeholders in April 2025, and Mount Kenya University announced an AI strategy the same year, but neither text was public when we checked. Until rules exist, a supervisor's judgement fills the gap, and that is a reason to keep your drafts and notes. How Turnitin's AI indicator behaves is covered in Turnitin AI detection: 6 facts Reddit gets wrong.

How to bring a high similarity index down honestly

The fixes that work are the ones the policies are asking for. Put direct quotations in quotation marks and cite them. Paraphrase in your own structure, not by swapping words in someone else's sentence, and cite the idea anyway. Check whether your report excludes the bibliography, because Moi and Strathmore both exclude references and a raw score with them included will look worse than the one the committee sees. If a single source carries more than 1%, which matters at Kenyatta, cut the passage back to what you actually need.

Penalties in these policies run from a six-month bar on resubmission at Kenyatta to discontinuation, and withdrawal of a degree already awarded, at Moi.

Where AI tools came into your drafting, the same principle applies: the argument has to be yours. A human rewriter like AI Rewriter, paid with M-Pesa, rebuilds your sentences so they read naturally and beat AI detectors, and its meaning check confirms the argument survived. On a draft built from your own research, an AI to human rewriter deals with the thing supervisors notice first: text that sounds machine-written. Before you submit anything, using ChatGPT to check a dissertation sets out where checking ends and ghost-writing begins.