How to Write a Thesis

Thesis vs dissertation — what's the difference?

The terms "thesis" and "dissertation" are used differently across institutions and countries, which can cause confusion. In the UK and much of the Commonwealth, the conventions are:

• Dissertation: A substantial piece of independent research submitted for a bachelor's or master's degree. Typically 10,000–20,000 words for a master's; 5,000–15,000 for an undergraduate.
• Thesis: The major piece of original research submitted for a doctoral degree (PhD, DPhil, EdD, etc.). Typically 70,000–100,000 words in the humanities and social sciences; shorter in some scientific disciplines where the thesis accompanies published papers.

In the United States, the convention is typically reversed: "thesis" refers to master's-level work, and "dissertation" to doctoral work. This guide uses "thesis" to mean a substantial doctoral or advanced master's research project — the principles apply at any level, but the scale and expectations differ.

The core difference between a thesis and a long essay or report is this: a thesis must make an original contribution to knowledge. It does not just review or apply existing scholarship — it advances it. This is the central requirement of doctoral work and the standard against which your thesis will be examined.

Standard thesis structure

Most theses in the humanities, social sciences, education, and business follow a broadly consistent structure, though the exact chapter organisation varies by discipline, institution, and topic:

• Preliminary pages: Title page, abstract, acknowledgements, table of contents, list of figures/tables, list of abbreviations
• Chapter 1: Introduction
• Chapter 2: Literature Review
• Chapter 3: Methodology
• Chapters 4–5 (or 4–6): Findings / Results / Analysis
• Chapter 6 (or final): Discussion and Conclusion
• Reference list / Bibliography
• Appendices

Scientific disciplines and those following an article-based (paper-compilation) thesis format will have different structures. For STEM subjects, the standard IMRaD structure (Introduction, Methods, Results, Discussion) is common, sometimes extended with a separate literature review chapter. Always confirm the expected structure with your supervisor and consult your institution's thesis submission guidelines before you begin.

Chapter-by-chapter guide

Word count allocation (80,000-word doctoral thesis)

These proportions are indicative, not prescriptive. Some methodology-heavy theses dedicate 20%+ to methodology. Some data-heavy findings chapters run 40%+. Discuss word allocation with your supervisor, especially if your thesis is at the upper or lower limit of the permitted range.

The through-line: managing your argument across chapters

One of the most common structural problems in doctoral theses is the loss of the central argument — a thesis that reads like a series of separate chapters rather than a single coherent project. The research question is the through-line that every chapter must connect to. Readers (and examiners) should be able to see at any point how the current chapter advances the answer to the central question.

Practical techniques for maintaining the through-line:

• Opening signposts: Begin each chapter by explicitly connecting it to the research question and the previous chapter. ("This chapter examines X, which is necessary to answer the second research question by establishing Y…")
• Closing transitions: End each chapter by summarising what it has established and signalling how the next chapter builds on it.
• Argument map: Keep a one-page visual argument map — a diagram showing how each chapter contributes to the central claim. Update it as the thesis develops and check it before finishing each chapter.
• Thesis statement in the introduction: Write a clear, specific statement of your central argument in Chapter 1. Every subsequent chapter should either build towards it or defend it.

Working with your supervisor

Your supervisor is your most important resource — use them well. Supervision is a professional relationship, not a tutorial: you are responsible for driving the work forward. Your supervisor's role is to provide guidance, feedback, and support — not to write the thesis for you or to chase you for progress.

• Submit drafts before meetings: Always send written work in advance of supervisory meetings. Meeting without a draft to discuss is largely wasted time at this level.
• Set clear expectations: Agree at the outset on meeting frequency, feedback turnaround time, and the format of feedback. These conversations are entirely appropriate to have.
• Keep a supervision log: Record what was discussed and agreed at each meeting. This protects both you and your supervisor, and helps you track your own progress.
• Respond to feedback in writing: When you revise based on supervisor comments, send a brief note explaining what you changed and why — and what you decided not to change and why. This shows intellectual autonomy and makes the next round of feedback more productive.
• Raise problems early: If you are struggling with a methodological problem, a data access issue, or the argument of a chapter, tell your supervisor early. Do not disappear and reappear months later with a problem that has compounded.

Writing a thesis: practical approach

A thesis is not written in a linear order from Chapter 1 to Chapter 6. The most productive approach:

1. Write the methodology chapter first: It is the most concrete chapter — you know exactly what you did. Writing it early forces clarity about your research design and creates a document for your ethics application.
2. Write the literature review early, but revise it last: Draft the literature review early in the project, but return to it near the end to incorporate recent publications and to ensure it accurately frames the gap your completed research addresses.
3. Write findings chapters as you go: Don't wait until all data is collected to begin writing up. Draft thematic sections as you analyse data — early writing reveals gaps that can still be addressed while fieldwork continues.
4. Write the introduction and conclusion last: Both require an accurate picture of what the thesis actually argues and achieves — which only becomes clear after the body chapters are drafted.
5. Write daily, even briefly: The thesis writing habit is more important than the quantity produced in any session. Even 200 words a day compounds to 70,000 words over a year.

Chapter-specific mistakes

• Introduction: Writing it first and never revising it — so it describes the planned thesis, not the completed one.
• Literature review: Organising by author rather than by theme; summarising sources sequentially without synthesis; failing to state the gap explicitly.
• Methodology: Describing what you did without justifying why; treating epistemology and ontology as box-ticking rather than genuine intellectual commitments; writing about your plan rather than what you actually did.
• Findings: Reporting data without interpretation; organising by data source rather than by theme; pasting in long quotations without analysis.
• Discussion: Repeating the findings rather than interpreting them in relation to the literature; failing to state the original contribution clearly; being defensive about limitations rather than analytical.

Viva preparation

The viva voce (oral examination) is the final stage of doctoral assessment in the UK, Australia, and most European systems. It typically lasts two to four hours and involves two examiners — usually one internal (from your institution) and one external (from another institution). The viva is not a test of everything you know — it is a focused examination of your thesis specifically.

Submission checklist

• ☐ Does the abstract accurately summarise the research question, methods, findings, and contribution?
• ☐ Does every chapter have a clear opening signpost and closing transition?
• ☐ Is the original contribution to knowledge stated explicitly in the introduction and conclusion?
• ☐ Is the literature review thematically organised and does it identify the gap clearly?
• ☐ Does the methodology justify, not just describe, every major methodological decision?
• ☐ Are the findings organised thematically with analysis integrated?
• ☐ Does the discussion connect findings to the literature and answer the research questions?
• ☐ Is the reference list formatted consistently in the required style?
• ☐ Does the thesis meet the institution's formatting requirements (font, margins, line spacing, binding)?
• ☐ Has the thesis been proofread for spelling, grammar, and consistency?