A thesis is a long, structured piece of original research, written to demonstrate that you can identify a problem, study it rigorously, and report your findings clearly. Its structure matters because examiners and readers rely on a predictable shape to follow your argument.
This article gives you a roadmap for the whole thesis. Each major chapter is covered in much more depth in a companion article in this series, listed at the end.
How Should You Plan a Thesis Before You Start Writing?
Plan before you write by mapping your research question, your chapters, and your timeline onto a single document; this prevents the common problem of writing chapters that do not connect to each other.
A short planning phase saves weeks of rewriting later. Useful planning steps include:
- Write your research question or thesis statement in one or two sentences, and keep it visible while you work.
- Sketch a one-page outline of every chapter and section, including the approximate word count for each.
- List the evidence, data, or sources each chapter will need, and check that you can actually access them.
- Agree on a writing schedule with your supervisor, including draft deadlines for each chapter.
- Set up a reference manager, such as Zotero, Mendeley, or EndNote, before you start reading for your literature review.
Thesis Outline
A thesis outline should look like a nested list of chapters and sub-sections, each with a one-line description of its purpose and a rough word count target.
| Chapter | Core question it answers | Typical share of total word count |
| Introduction | What is the problem, and why does it matter? | 8 to 10 percent |
| Literature review | What is already known, and what is missing? | 20 to 25 percent |
| Methodology | How did you study the problem? | 10 to 15 percent |
| Results | What did you find? | 15 to 20 percent |
| Discussion | What does it mean? | 20 to 25 percent |
| Conclusion | So what, and what next? | 5 to 8 percent |
What Is the Best Order in Which to Write the Chapters?
The best order to write a thesis is rarely the order in which it is read. Most experienced writers draft the methodology and results first, then the literature review, and finally the introduction and abstract.
- Methodology: write this early, often while you are still collecting data, since the methods are freshest in your mind at this stage.
- Results: draft this once your analysis is stable, focusing on describing findings without interpreting them yet.
- Literature review: revise or finish this once you know what your results actually show, so you can sharpen the gap your study fills.
- Discussion: write this after results, linking your findings back to the literature review and research questions.
- Introduction: write or rewrite this once the whole argument is visible, so it accurately previews the thesis.
- Abstract and conclusion: write these last, as compressed summaries of the finished work.
How Long Should Each Chapter Be?
Chapter length should be guided by your institution’s overall word limit and by how much work each chapter is doing, not by an arbitrary even split across chapters.
As a rough guide for a thesis of 80,000 words, you might expect an introduction of 6,000 to 8,000 words, a literature review of 15,000 to 20,000 words, a methodology of 8,000 to 12,000 words, results of 12,000 to 16,000 words, a discussion of 15,000 to 20,000 words, and a conclusion of 4,000 to 6,000 words. Always check your own department’s guidelines, since these vary considerably.
What Common Mistakes Cause Theses to Lose Marks?
The most common mistakes are a mismatch between the research question and the conclusions, an under-developed literature review, and a discussion chapter that simply repeats the results.
- Introduction promises something the thesis does not deliver, or the research questions change without the rest of the thesis being updated to match.
- Literature review reads as a list of summaries rather than a synthesis that builds toward a clear gap.
- Methodology omits details needed for replication, such as sample size justification, instruments used, or analysis software and versions.
- Results chapter mixes interpretation with description, leaving little new to say in the discussion.
- Discussion chapter restates results instead of explaining what they mean, why they matter, and how they relate to prior work.
- Abstract is written too early and never updated to match the final thesis.
How Can You Keep Your Argument Consistent from Start to Finish?
Keep your argument consistent by re-reading your introduction and research questions every time you finish a chapter, and adjusting earlier chapters if your findings have shifted the story.
A simple consistency check before submission:
- Do the research questions in the introduction match the questions answered in the discussion?
- Does every major theme in the literature review reappear, in some form, in the discussion?
- Does every method described in the methodology produce results that are reported somewhere in the results chapter?
- Does the abstract accurately summarize the final version of each chapter, not an earlier draft?
What Writing Habits Make the Process More Manageable?
The writing habits that make a thesis manageable are short, regular writing sessions, separating drafting from editing, and getting feedback on individual chapters rather than waiting for a complete draft.
- Write in short, regular sessions, for example sixty to ninety minutes, rather than occasional marathon sessions.
- Draft first without worrying about style; edit for clarity and flow in a separate pass.
- Share individual chapters with your supervisor as they are finished, rather than waiting for the whole thesis.
- Keep a running document of decisions and justifications, for example why a particular method or framework was chosen, to reuse in your methodology and discussion.
- Back up your work regularly, using version control or a cloud service with version history.
Difference Between Thesis and Dissertation
The terms “thesis” and “dissertation” are often used interchangeably, but their meaning depends largely on the country and academic level.
In the US, a thesis typically refers to the culminating research project for a master’s degree, while a dissertation refers to the much longer, more rigorous document submitted for a doctoral (PhD) degree. In the UK, Australia, and much of Europe, the terminology is often reversed; “dissertation” is used for undergraduate or master’s-level research projects, while “thesis” refers to the doctoral submission.
Beyond terminology, the two also differ in scope and purpose. A thesis (master’s level) generally demonstrates that a student can engage critically with existing research, often by analyzing or synthesizing prior work, conducting a smaller original study, or applying established methods to a new context. A dissertation (PhD level) is expected to make an original contribution to knowledge in the field; it must identify a genuine gap in the literature and present new research, data, or theory that advances the discipline.
Length and timeline also vary significantly. A master’s thesis is usually 60–100 pages and completed within one academic year, whereas a doctoral dissertation can run 150–300+ pages and take 2–5 years (or longer) to complete, including data collection, multiple rounds of revision, and a formal defense.
| Aspect | Thesis (Master’s) | Dissertation (PhD) |
| Purpose | Demonstrate research competency | Make an original contribution to the field |
| Typical length | 60–100 pages | 150–300+ pages |
| Timeline | ~6–12 months | 2–5+ years |
| Committee involvement | Advisor + 1–2 readers | Full committee + external examiner |
| Defense | Often informal or optional | Formal, often public defense |
How Do Bachelor’s, Master’s, and PhD Theses Differ?
Bachelor’s, master’s, and PhD theses differ mainly in scope, originality, and the level of independence expected, with each step up requiring a larger and more independent contribution to knowledge.
| Aspect | Bachelor’s thesis | Master’s thesis | PhD thesis |
|---|---|---|---|
| Typical length | 8,000 to 15,000 words | 15,000 to 30,000 words | 60,000 to 100,000 words |
| Primary goal | Demonstrate competence in research skills | Demonstrate independent application of research methods | Make an original contribution to knowledge |
| Originality required | Low; may apply existing methods to a new context | Moderate; often a smaller-scale original study | High; must be novel, defensible research |
| Literature review depth | Overview of key sources | Focused, synthesized review of a defined area | Comprehensive, critical synthesis of the field |
| Supervision level | Close guidance, often with set milestones | Moderate guidance, more student-led | Largely independent, supervisor as advisor |
| Data or sources | Often secondary data or small-scale primary data | Primary data collection common, moderate scale | Substantial primary data, often multiple studies |
| Methodology chapter | Brief, may follow a template closely | Detailed, with some justification of choices | Extensive, with strong methodological justification |
| Final assessment | Written submission, sometimes a short viva | Written submission, often with a viva or presentation | Written submission plus a formal viva or defense |
How to Format a Thesis
Formatting requirements vary by university and department, but most institutions specify standards across the following areas:
Page setup and margins
Most universities require 1-inch (2.54 cm) margins on all sides, though binding margins on the left may need to be wider (1.5 inches) to accommodate spiral or hardcover binding.
Font and spacing
Common requirements include 12-point Times New Roman or Arial, with double-spacing for body text (single-spacing is often used for footnotes, captions, and block quotes).
Pagination
Preliminary pages (title page, abstract, table of contents, acknowledgments) are usually numbered with lowercase Roman numerals (i, ii, iii), while the main body uses Arabic numerals (1, 2, 3) starting from the introduction.
Headings and subheadings
A consistent hierarchy (e.g., Chapter > Section > Subsection) should be applied throughout, often using a numbering system (1.1, 1.2, 1.2.1) for easy navigation.
Citations and referencing style
The citation style (APA, MLA, Chicago, Harvard, Vancouver) is typically dictated by the department or discipline, and must be applied consistently across in-text citations and the bibliography/reference list.
Tables, figures, and captions
All tables and figures should be numbered sequentially, captioned clearly, and referenced in the text. A separate “List of Figures” and “List of Tables” is often required in the preliminary pages.
File format and submission
Most universities now require digital submission as a PDF, often through a thesis repository system, alongside a printed/bound copy for the library archive.
Because formatting rules are highly specific and often checked closely before approval, it’s worth downloading your university’s official thesis formatting template or guidelines document early and using it from the very first draft, rather than reformatting at the end.
See also: How to Edit a Thesis: A Complete Guide to Revising and Polishing Your PhD Dissertation
Frequently Asked Questions
Can I write my thesis chapters out of order?
Yes. Most experienced researchers write the methodology and results first, then the literature review, and finally the introduction, abstract, and conclusion, since these summarizing sections are easier to write once the full argument is visible.
How do I choose between a monograph thesis and a thesis by publication?
This choice usually depends on your field’s norms, your supervisor’s preference, and how far along your publications are; biomedical and some social science fields favor thesis by publication, while humanities fields more often expect a single connected monograph. Ask your department early, since the format affects how you plan every chapter.
What should I do if my results do not support my original hypothesis?
Report the results honestly and use the discussion chapter to explain possible reasons, including limitations of design, sample, or measurement; unexpected results are a normal part of research and are often discussed at length in viva or defense examinations.
How many sources should a literature review cite?
There is no fixed number; the right amount is whatever is needed to demonstrate that you understand the field, can identify the gap your study addresses, and have engaged with both classic and recent work. Quality of engagement matters more than raw count.
Is it normal to feel like my thesis is never finished?
Yes, this is extremely common; most theses could be revised indefinitely. Agreeing on a submission date with your supervisor, and treating later drafts as refinements rather than rewrites, helps many students move from endless revision to submission.
