The two words get used loosely, and the line between them is blurry: an argumentative essay can involve a lot of research, and a short research paper can read like an essay. What actually separates them is where the weight of the argument sits. In an essay it rests mostly on your reasoning; in a research paper it rests on sources you found, read and cite.
What is the difference between a research paper and an essay?
| Essay | Research paper | |
|---|---|---|
| Main purpose | Present your argument, interpretation or reflection | Answer a question using evidence from outside sources |
| Where the evidence comes from | Your reasoning, a set text, class readings, sometimes a few sources | Sources you search for and evaluate: scholarly articles, books, data, primary documents |
| Sources | Few or none required, depending on the assignment | A required number or type, usually including scholarly sources |
| Thesis | Your position, often stated early and argued throughout | A claim or answer that the research supports; it may sharpen as you research |
| Structure | Introduction, body paragraphs, conclusion | Often longer sections with headings; may include a literature review, method or discussion |
| Citations | Needed for any source you use | Central: in-text citations and a reference list in a set style (APA, MLA, Chicago) |
| Length | Usually shorter | Usually longer |
| Time | Mostly writing and revising | Much of it goes into finding and reading sources before drafting |
| Voice | More room for your perspective and style | More formal; your voice shows in the analysis and synthesis |
These are typical differences, not fixed rules. The assignment sheet always wins.
Is a research paper a type of essay?
In a loose sense, yes: both are structured academic writing with a thesis. Writing guides treat them as overlapping genres. The Purdue OWL, for example, notes that an argumentative essay involves lengthy, detailed research, while expository essays involve less research and are shorter (Purdue OWL). So a long argumentative essay with many cited sources is very close to an argumentative research paper. The practical question is not the label but how much of the paper must come from sources.
What are the types of research papers?
The Purdue OWL describes two major types (Purdue OWL):
- Argumentative research paper: the introduction states the stance you will take (the thesis), and the paper aims to persuade, so the topic should be debatable.
- Analytical research paper: it starts from a research question on which you have not yet taken a stance; it is an exercise in exploration and evaluation, and its thesis is often more fluid than in an argumentative paper.
Many courses also assign papers that report your own study (with method and results sections) or literature reviews, which map what the research says without arguing a new point. For that genre, see how to write a literature review.
What does the same topic look like as an essay and as a research paper?
Topic: later school start times for high schools. Both versions below were written for this guide. In the research paper version, the bracketed labels stand for the real sources a student would cite.
As an essay
Thesis: Pushing high school start times later is worth the inconvenience, because a school day built around teenagers' actual mornings treats students as people to be taught rather than schedules to be filled.
Body paragraph:
Anyone who has taught a first-period class knows what 7:30 a.m. looks like: heads on desks, slow answers, a room that wakes up only by the second bell. Schools accept this as normal because the schedule has always been this way, not because it serves learning. If a school would never schedule its most important exam during the hour when students think least clearly, it should be equally uncomfortable scheduling a whole class there every day. Starting later is a statement about priorities: it says the people in the building matter more than the bus routes.
The paragraph argues from experience, reasoning and values. It could cite a source, but it doesn't depend on one.
As a research paper
Research question: Do later high school start times improve students' sleep and academic outcomes?
Thesis: Later high school start times increase students' sleep and reduce tardiness, but the evidence for higher grades is weaker and depends on how much later the day begins.
Body paragraph:
Studies of districts that moved start times later consistently report more sleep on school nights [Source 1, p. 4; Source 2, p. 211]. The size of the gain varies with the size of the change: districts that delayed the first bell by about an hour reported larger gains than those that moved it by twenty minutes [Source 3, Table 2]. Effects on grades are less consistent. One multi-district study found modest improvements in first-period grades only [Source 2, p. 214], while a single-district evaluation found no change in grade point average [Source 4, p. 9]. Taken together, the research supports later start times for health and attendance, while the academic case rests on fewer and more mixed findings.
The claim comes from the sources, every sentence that reports a finding is cited, and the writer's work shows in comparing and weighing the evidence. The specific findings here are illustrations of the form; a real paper reports what its actual sources say.
Which one is my assignment? A checklist
Read the prompt and count the yes answers. Three or more usually mean a research paper.
- Does it require a number or type of sources? "At least eight scholarly sources" means research paper.
- Does it use the verb "research"? The UNC Writing Center explains that "research" in an assignment means gathering material from outside sources, often with the requirement that you analyze what you found (UNC Writing Center).
- Does it name a citation style (APA, MLA, Chicago) and ask for a reference list or works cited page?
- Does it ask for a research question, a proposal or an annotated bibliography first? Staged assignments usually lead to a research paper.
- Is it long relative to your other assignments, and is there more than a week or two to write it?
- Does it ask you to evaluate evidence or report what is known, rather than respond, reflect or interpret a single text?
If most answers are no, it is probably an essay: you can rely more on your own reasoning and the course readings. If the prompt is ambiguous, ask your instructor how many outside sources they expect. That one question settles most cases. For typical numbers, see how many sources a research paper needs.
What about term papers, research essays and reports?
| Term | What it usually means | Closer to |
|---|---|---|
| Term paper | A major paper due at the end of a term, often counting for a large share of the grade | Usually a research paper |
| Research essay | An essay that must use and cite outside sources | Between the two; treat it as a short research paper |
| Argumentative essay | A position argued with evidence; can involve substantial research | Depends on the source requirement |
| Expository essay | Explains a topic; less research, shorter | Essay |
| Report | Presents findings, often with headings, sometimes data you collected | Research paper (especially in the sciences) |
| Literature review | Summarizes and synthesizes what research says about a question | Its own genre, built entirely on sources |
The labels vary by instructor and field, so read them as hints and check the requirements.
How do you write each one?
The process differs mainly in the first half:
- Essay: clarify the prompt, draft a thesis early, outline your reasons, write, revise. Sources, if any, support points you already planned.
- Research paper: turn the topic into a question, search and read sources, take notes with page numbers, form the thesis from what you found, outline, draft, cite, revise. The full process is in how to write a research paper.
In both, the thesis is the backbone. For patterns that work in either genre, see thesis statement examples.
Frequently asked questions
Is a research paper longer than an essay?
Usually, yes, because it has to present and discuss evidence from several sources. Length is set by the assignment, though, and a short research paper can be shorter than a long essay.
Does an essay need sources?
Only if the assignment asks for them or you use someone else's ideas, words or data. Any source you use must be cited, in an essay as in a research paper.
Is a research paper an argumentative essay?
Not necessarily. An argumentative research paper takes a stance and persuades; an analytical research paper starts from an open question and explores it. An argumentative essay may involve a lot of research, so the two can overlap.
What is a research essay?
An essay that must use and cite outside sources. In practice, treat it as a short research paper: find sources, cite them, and build your argument on them.
How can I tell if my assignment is a research paper?
Look for a required number or type of sources, the verb "research," a named citation style, and staged steps like a proposal or annotated bibliography. When in doubt, ask how many outside sources are expected.
Sources
- Purdue Online Writing Lab. Argumentative Essays. owl.purdue.edu/owl/general_writing/academic_writing/essay_writing/argumentative_essays.html
- Purdue Online Writing Lab. Genre and the Research Paper. owl.purdue.edu/owl/general_writing/common_writing_assignments/research_papers/genre_and_the_research_paper.html
- The Writing Center, University of North Carolina at Chapel Hill. Understanding Assignments. writingcenter.unc.edu/tips-and-tools/understanding-assignments/
Written and checked by the Paperspring Editorial Team against the sources above. Found a mistake? Tell us.