How to Write a Literature Review for a Research Proposal (2026 Guide)

A proposal literature review is the section of a Masters or PhD research proposal that uses selected prior studies to justify the proposed study: it establishes what is known, shows what is missing or contested, and leads directly to the research question or aim. Its job is persuasion, not coverage.

For the rest of the document, see how to write a research proposal.

What is the literature review in a research proposal actually for?

Its purpose is to justify your study. The Wits Faculty of Health Sciences guidelines for higher-degree applicants say so outright: "Only information relevant to the study should be included as the primary purpose to this part of the protocol is to justify the study in the light of previous information" (Wits, guidelines on proposal development). Wits would rather call the section a "background literature analysis and critique".

Sheffield’s Sociological Studies department calls the proposal’s literature component "a short note of key existing literature" and adds that "literature reviews are not simply descriptive mapping exercises at PhD level" (Sheffield, writing a research proposal). The University of Edinburgh’s 2024 guide explains why: "Research proposals have a limit on words or pages so you won’t be able to analyse the whole existing body of literature" (Edinburgh, how to write a research proposal).

Funders read it the same way. The DSI-NRF Master’s and Doctoral scholarship guide for 2025 asks for "a concise overview of the proposed research" with "appropriate literature references" and warns that "applications with no or insufficient research content will be rejected" (DSI-NRF postgraduate funding guide for 2025). Concise, referenced, justificatory. That is the whole brief.

How long should the literature review in a research proposal be?

Usually two to five pages, or roughly 1,200 to 1,400 words where a department counts words, but the only figure that matters is your own faculty’s. Here are the figures I could read on the institutions’ own pages, as of August 2026.

The spread is real: a Sheffield politics applicant has 2,000 words for the whole proposal, while a UNISA environmental sciences doctoral candidate can run to 35 pages. Find your faculty’s document before you write a word. For the dissertation chapter rather than the proposal section, see how long a literature review should be.

How is a proposal literature review different from a dissertation literature review chapter?

The proposal version is shorter, selective, written in the future tense and ends on the question; the dissertation chapter is longer, comprehensive, and written in the past tense after the reading is complete. UNISA CAES states the tense rule plainly: "the past tense is used in the thesis whereas the future tense is used in proposal."

How should I structure a proposal literature review?

Use a funnel: open at the field, narrow to the specific problem, narrow again to what has and has not been done, and close on your research question. The Wits Health Sciences guidelines describe exactly this: the paragraphs "should be carefully structured and lead the reader carefully and deliberately towards the final paragraph which should contain the research question/aim."

A two to five page proposal review has four moving parts:

1. The field and why it matters. One or two paragraphs. Establish the phenomenon, its stakes and the main lines of enquiry. Cite the landmark or most recent work, not everything.
2. What is known about your specific problem. The core. Group studies by theme or finding, not one paragraph per paper: what they agree on, where they disagree, which methods dominate.
3. What is missing, contested or untested. The gap. Name it precisely: a population not studied, a context not covered, a method not applied. See how to find a research gap.
4. The research question. A short closing paragraph that turns the gap into the question or aim. Leeds SEE asks for "a clear statement of your research questions" inside the literature review itself.

If your faculty prescribes sub-headings, follow them. The University of Pretoria’s Communication Management Division, for instance, requires "conceptual and operational definitions of all the key concepts/constructs" and "a focussed summary of relevant previous research". That is still a funnel, with definitions front-loaded.

What should I include in a proposal literature review, and what should I leave out?

Include the studies that carry your argument to the gap, and leave out everything that only proves you have read widely. The Wits Health Sciences figure of "ten to twenty references" for about five pages is a sanity check: sixty citations in four pages is a bibliography with commentary, not a review.

Keep the two or three foundational studies that define the problem. Keep the most recent work; Stellenbosch FMHS tells applicants to "make use of the most up to date literature." Keep studies that disagree, since disagreement is where gaps live, and any study that used the method or setting you plan to use.

Cut background a specialist already knows. Wits says the introduction is written for "the non-expert but intelligent reader": enough to orient, not enough to teach. Cut summaries of papers you will not use again, long critiques of individual studies, and your own opinions or pilot results.

My own rule of thumb: every paragraph should end closer to your research question than it started, or it goes.

How do I show the research gap without overclaiming?

State what the existing studies did, state what they did not do, and claim only the difference. The UNISA CAES guide defines it simply: "The GAP refers to research that has NOT been done."

Edinburgh’s guide lists "making over-ambitious claims about the intended research" among the things to avoid, and a reviewer who reads "no study has ever" will run a quick search to test it.

Three habits keep the gap honest. Scope the claim: "no published South African study has tested X in Y context" is checkable, "nobody has studied X" is an invitation to be corrected. Show the search: one sentence naming databases, terms and date range makes the gap a finding, not a hope. Prefer "limited", "contested" or "untested in" over "none"; Sheffield asks only that the question be "something that has not been posed before", which a new angle, population or method satisfies.

Then convert the gap into the question. UCT Philosophy advises applicants to "aim to state a single research question, which you may then choose to flesh out through a number of sub-questions." If the phrasing will not come, see how to write a research question.

What mistakes do examiners flag in proposal literature reviews?

The most common are reading too little, describing instead of arguing, and failing to connect the review to the aim and methods. UNISA’s CAES guide lists reasons proposals fail, and several sit squarely in the literature review: "Inadequate knowledge, have not read enough", "Muddled thinking", "Lack of logic", "No clear aims and objectives", "Title, introduction, aim, objective and methods not collated", and "Plagiarism/insufficient referencing".

Not read enough: the reviewer knows the field, and if the obvious recent paper is missing they will assume you did not find it. Muddled thinking usually means organising by paper rather than by argument; Wits’s instruction to "review the literature first (read through it) and then analyze and critique" is the fix. Not collated: if the review ends on a gap about rural clinics and the methods sample urban ones, the reviewer will notice. And from Edinburgh: "A surprisingly large percentage of proposals are rejected simply because they do not follow the rules." Over the page limit, wrong referencing style, missing headings.

Can I see a worked outline for a proposal literature review?

Yes. Here is a skeleton for a section of roughly three to five pages, with placeholders you replace.

• Paragraph 1: the field. [Phenomenon] is a recognised problem in [setting] because [stakes]. Research has approached it through [line of enquiry A] and [line of enquiry B] (Author, Year; Author, Year).
• Paragraph 2: what is established. Within [line of enquiry], studies of [specific problem] agree that [consistent finding] (Author, Year; Author, Year). Most of this work used [dominant method] in [dominant context].
• Paragraph 3: where the literature disagrees. Findings on [sub-issue] are mixed: (Author, Year) reports [pattern], while (Author, Year) found [contrasting pattern], possibly because [difference in method or setting].
• Paragraph 4: the gap. No study identified in [databases searched, date range] has examined [specific problem] in [population, context or with method]. The closest is (Author, Year), which [what it did and what it left open].
• Paragraph 5: the research question. Therefore the aim of this study is to [aim]. The primary research question is: [question]. Sub-questions address [sub-question 1] and [sub-question 2].

That closing mirrors what Wits Health Sciences asks for ("Therefore the aim of my study is to ..."). If your faculty puts the research question in its own section, end paragraph 4 by pointing to it. A problem statement can absorb paragraph 4 if space is tight.

Can AI help me draft the literature review section of a proposal?

It can help with the first pass, provided the papers, the reading and the argument remain yours. Litrevu is an AI literature review assistant that turns the papers a researcher has already gathered into a cited first draft, with every citation traceable to the uploaded source. The draft is a starting point, not a submission: you read every line, verify every citation against the PDF and own every word, because the reviewer is assessing your reading, not the software’s.

Elicit is strongest at finding and screening papers across a large corpus, the step before a proposal review. Consensus gives a fast evidence summary for a single question. Scite shows whether later papers support or contrast a claim, useful when checking that a gap is real. Research Rabbit maps a citation network visually. Litrevu’s strength is narrower: turning papers you have already chosen into a drafted, cited, synthesised review.

Here is the shape of a first-pass proposal paragraph from Litrevu, a format illustration with placeholder tokens only, not a real result:

Research on [topic] has concentrated on [theme A] (Author, Year; Author, Year) and, more recently, on [theme B] (Author, Year) [Source 1] [Source 2]. Across these studies, [consistent finding] is reported in [context] [Source 3], although (Author, Year) observed [contrasting pattern] under [condition] [Source 4]. Fewer studies have addressed [specific problem] in [population or setting], and none of the uploaded sources examined [gap] [Source 2] [Source 5]. This gap motivates the present study’s focus on [research question].

Each "[Source n]" points to one uploaded PDF, so the writer can check every sentence against the page before rewriting it.

Frequently asked questions

Does the literature review in a proposal need a separate heading?

Follow your faculty’s template. Leeds SEE lists "Literature review" as its own section with its own word range, while Wits Health Sciences treats it as background material it would rather call a "background literature analysis and critique". If no template exists, a heading such as "Literature Review" or "Background and Rationale" is safe.

How many references should a proposal literature review cite?

Enough to carry the argument to the gap and no more. The only published figure I found is from Wits Health Sciences, which says "between ten to twenty references will suffice" for a section of about five pages. Prioritise recent, directly relevant work over volume.

Should the research question go inside the literature review or in its own section?

It depends on the faculty. Leeds SEE requires "a clear statement of your research questions" within the literature review, and Wits Health Sciences wants the research question or aim in the final paragraph of the background. Where a department gives it a separate section, the literature review should end by pointing directly at it.

Can I reuse the proposal literature review in my dissertation?

You can reuse the reading and the argument, but the chapter will need rewriting. The dissertation chapter is longer, covers more, and switches to past tense for the completed study, as the UNISA CAES guide notes.