Accidental vs Intentional Plagiarism: What's the Difference
Accidental plagiarism happens by mistake, while intentional plagiarism is a deliberate attempt to pass off someone else's work as your own. Both are treated as plagiarism, but the reasons behind them and the usual consequences are quite different. Here is how to tell them apart, with real examples of each.
What Counts As Accidental Plagiarism
Unintentional plagiarism usually comes from carelessness rather than dishonesty. A writer might forget to add a citation, mix up notes from several sources, or paraphrase a sentence so closely that it still matches the original wording. Read our full guide to what plagiarism actually means for a complete breakdown of every type.
Side By Side Comparison
Accidental (Unintentional) Plagiarism
- A missing citation for a paraphrased idea
- A quote copied without quotation marks by mistake
- Mixing up notes from two sources during research
- Reusing a phrase from memory without realizing it came from a reading
Intentional Plagiarism
- Buying or downloading a finished paper online
- Copying a classmate's assignment and submitting it as your own
- Reusing an old paper as new work without telling anyone
- Removing a source link on purpose to hide where text came from
Real Intentional Plagiarism Examples
- A student pays a writing service for a custom essay and submits it under their own name.
- An employee copies a colleague's report, changes the header, and presents it to a client as original work.
- A blogger republishes a competitor's article word for word on a different domain to rank for the same keywords.
How Each Is Usually Handled
Most schools and publishers look at intent before deciding on a response. A first case of unintentional plagiarism, such as a missing citation, often results in a warning or a chance to revise the work. Intentional plagiarism, such as buying a paper or copying a classmate, usually leads to a failing grade, suspension, or in workplace settings, termination. Either way, the plagiarism still shows up on a similarity report, so the safest habit is to check your work before you submit it, not after.
Keep Reading
For a full definition and every type of plagiarism, start with What Is Plagiarism? Types, Examples & How to Avoid It.
Frequently Asked Questions
What is accidental plagiarism?+
Accidental plagiarism, also called unintentional plagiarism, happens when a writer copies text, forgets a citation, or paraphrases too closely without meaning to take credit for someone else's work. The writer did not set out to deceive anyone, but the result still counts as plagiarism.
Does it matter if plagiarism was not on purpose?+
In most schools and workplaces, intent is considered when deciding on a penalty, but it rarely removes the issue completely. A similarity report will flag copied or unclear text regardless of whether it was accidental or planned.
What are some examples of intentional plagiarism?+
Common intentional plagiarism examples include buying a paper online, copying a classmate's assignment, submitting an old paper as new work without permission, or lifting whole paragraphs from a website and removing the source link on purpose.
How is unintentional plagiarism usually treated differently?+
Many schools and publishers offer a warning, a chance to revise, or a lighter penalty for a first case of unintentional plagiarism, especially when the missing citation is minor. Intentional plagiarism, such as buying a paper, usually leads to a much harsher outcome.
How can I avoid accidental plagiarism?+
Keep a running list of every source as you research, use quotation marks for direct text, cite paraphrased ideas as well as quotes, and check your final draft with a plagiarism checker before you submit or publish it.
Not Sure If Your Draft Has A Missed Citation?
Run it through a free similarity check and see exactly what needs a source.
Try the Free Plagiarism Checker