What Tense Should I Use in My Thesis?

Use past tense to describe what you did and what you found, and present tense to state established facts and interpret what your findings mean. That single rule resolves most of the tense confusion students run into while drafting a thesis, and it is the convention formalised in Section 4.12 of the APA 7th edition Publication Manual, which most social science and many STEM departments follow either directly or as a close model.

What Tense for the Literature Review?

Use past tense or present perfect tense when describing what a specific researcher did or found: “Martin (2020) addressed the relationship between X and Y” or “Researchers have studied this mechanism extensively.” APA guidance recommends past tense for discussing completed past events — which covers almost all of your literature review, since the studies you are citing were, by definition, already conducted and published before you wrote about them.

Present tense becomes appropriate within the literature review specifically when you are stating something that is now treated as an established, generally accepted fact in the field, rather than reporting a specific study’s finding: “Working memory capacity is limited,” not “Working memory capacity was limited by Miller (1956).” The distinction is between reporting what a study showed at the time it was conducted (past) and stating what the field now takes to be true as a settled matter (present).

What Tense for the Methods Chapter?

Past tense, throughout. You are describing procedures you already carried out before you started writing this chapter: “Participants completed an online survey,” “Data were collected over a six-week period,” “Interviews were conducted in a private setting and audio-recorded.” This holds whether you are writing up a quantitative experimental design or a qualitative interview study — in both cases, you are narrating events that have already happened by the time a reader encounters the chapter.

A common slip is switching briefly into present tense mid-methods when describing a tool or instrument that still exists and is still used the same way today (“The survey uses a five-point Likert scale”). APA guidance treats this as acceptable when you are describing a stable, ongoing property of an instrument, but the actions you performed with that instrument should stay in past tense: “The survey used a five-point Likert scale, and participants completed it online.”

What Tense for the Results Chapter?

Past tense. APA 7th edition specifically recommends past tense for reporting results, because you are describing what your analysis showed at the point you ran it: “Scores decreased significantly following the intervention,” “The regression revealed a positive relationship between the two variables,” “Thematic analysis identified three recurring patterns.” Even though the data now sits permanently in your dataset, the act of finding that result was a discrete past event, and APA treats it as such.

This holds for figures and tables too: the caption or in-text reference to a table should generally describe what the analysis showed (“Table 3 shows the distribution” is a common convention exception here — present tense is often used specifically to point a reader at something visually present on the page, functioning almost like a stage direction rather than a report of a past event). If your department’s style guide differs from APA on this specific point, follow the department guide, since table-reference conventions are one of the more inconsistently applied rules across disciplines.

What Tense for the Discussion and Conclusion?

Present tense. APA recommends present tense for discussing the implications of your results and for presenting conclusions, limitations, and future directions: “These findings suggest that the intervention has a measurable effect,” “This study concludes that further longitudinal work is needed,” “A limitation of this work is the relatively small sample size.” The logic is that interpretation, unlike the act of collecting data, is something you are doing in the reader’s present — you are making an argument now about what the (past-tense) results mean.

What Tense for the Abstract?

Abstracts typically mix tenses in a compressed version of the same pattern used across the full thesis: past tense for describing what you did and found (“This study examined the relationship between X and Y. Results showed a significant positive correlation”), and present tense for the study’s contribution and implications (“These findings contribute to our understanding of…”). Some disciplines and journals prefer a fully present-tense abstract for readability and searchability; check your department’s or target journal’s specific abstract guidelines, since this is one area where local convention more frequently overrides the general APA pattern.

Can I Mix Tenses Within a Paragraph?

Yes, and in a discussion section you often need to. A well-constructed discussion paragraph frequently moves from past tense (restating what you found) into present tense (interpreting what it means): “Participants in the treatment group reported lower anxiety scores than controls [past — what happened]. This finding is consistent with prior work on exposure-based interventions [present — what it means now].” The shift is not a mistake as long as it follows this logical pattern rather than switching arbitrarily mid-sentence. APA style guidance explicitly notes that a chosen tense should be used consistently within the same and adjacent sentences describing the same type of content, so the goal is a deliberate, rule-governed shift, not a random one.

Is It Wrong to Use Present Tense Throughout?

For most empirical theses in the social sciences and STEM fields, writing the entire document in a single present tense is inconsistent with both standard convention and APA 7th edition’s explicit function-based guidance, which separates tense by what a sentence is doing (narrating a past action vs stating current understanding). Examiners in these fields will typically flag an all-present-tense methods or results section as a mechanical error, because it obscures the basic distinction between what you did and what it means. Some humanities disciplines follow different, more consistently present-tense conventions (for instance, discussing a text’s argument in the “historical present”), so if you are outside social science or STEM, check your department’s specific style guide before assuming the APA pattern applies to you.

When Should I Use Present Perfect Instead?

Present perfect (“Researchers have shown,” “Studies have demonstrated”) is the right choice when you are referring to a body of research contributed by multiple people over time, rather than a single dated study, or when an action began in the past and remains ongoing or relevant now without one specific start and end point. It works well as an opening move in a literature review paragraph before you narrow down to specific, individually dated studies described in simple past tense: “Researchers have extensively studied the link between sleep and memory consolidation. Walker and Stickgold (2006) found that…”

Common Tense Errors Examiners Flag

Three patterns come up repeatedly in examiner feedback. First, describing your own results in present tense as though the data-collection event is still happening (“The data shows a decrease” instead of “The data showed a decrease”). Second, describing a previous author’s specific, dated finding in present tense as if it were a currently established fact rather than a single study’s result (“Smith argues X” when what is meant is “Smith (2019) argued X” based on a specific dataset from that paper). Third, inconsistent tense within a single sentence describing one continuous action, which reads as a proofreading oversight rather than a deliberate stylistic choice. All three are mechanical, low-effort fixes once you are looking for the specific pattern, which is why examiners tend to treat persistent tense errors as a proofreading issue rather than a substantive one — but persistent ones across an entire thesis can still cost marks for presentation and clarity.

A fourth, subtler pattern worth watching for is tense drift across a long revision process: it is common to draft a results chapter in past tense, revise it months later, and accidentally introduce present-tense sentences while editing, without noticing the section as a whole is no longer internally consistent. Reading each chapter aloud in one sitting, specifically listening for tense rather than content, catches most of these before a supervisor does.

Quick Reference Table

Keeping tense consistent across a document this long is one of the more tedious mechanical checks in the final editing pass — it is easy to get right chapter by chapter and then lose track of when you move sections around. Tesify can help you draft each chapter with the correct tense convention built in from the start, and flag inconsistencies as you edit rather than leaving them for a final proofread. For related formatting questions, see our guides to APA citation format and the differences between a thesis and a dissertation.

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