APA Heading Levels 1–5 Explained (With Examples)

Your professor doesn't need to read a single sentence of your argument to know the paper is disorganized. One bolded heading sitting where a plain one belongs, or a heading that jumps straight from Level 1 to Level 3, tells the whole story before the content does.

APA heading levels are the structural signal your paper sends before anyone reads a word of it, and getting even one of the five wrong makes the whole document look uneven. Section 2.27 of the Publication Manual of the American Psychological Association, 7th edition, lays out five distinct levels, each with its own alignment, weight, capitalization, and punctuation rule. Five different formats for what can look, from a distance, like the same bolded line feels arbitrary the first time you try to keep them straight. Once you see the pattern behind them, applying the right one stops being a guessing game. This guide walks through all five, shows you exactly what each one looks like on the page, and covers the two rules almost every student breaks without realizing it.

Level 1: centered, bold, title case

Level 1 is the heading you will use most. It is centered, bold, and set in title case, meaning the major words are capitalized (Method, not method; Data Analysis, not Data analysis). The paragraph that follows it starts as a normal new paragraph on the next line, indented like any other body paragraph.

Method

Participants were recruited from three sections of an introductory psychology course during the fall semester.

Level 1 headings mark the major sections of a student paper: Method, Results, Discussion, and similar top-level divisions. If your paper is short and only needs one layer of structure, Level 1 is often the only heading level you touch.

Level 2: flush left, bold, title case

Level 2 drops the centering but keeps the bold and the title case. It sits flush against the left margin, and like Level 1, the text below it begins as its own new paragraph rather than running into the heading.

Participants

A total of 64 students volunteered in exchange for partial course credit.

Use Level 2 to break a Level 1 section into its parts. A Method section, for example, commonly splits into Level 2 subsections for Participants, Materials, and Procedure.

Level 3: flush left, bold italic, title case

Level 3 stays flush left and keeps the title case, but the text is now bold and italicized together. Nothing else changes: the following paragraph still starts fresh on its own line.

Recruitment Procedure

Students were approached during scheduled lab sessions and given a brief description of the study before signing the consent form.

Level 3 is where most undergraduate papers stop needing more structure. If you find yourself reaching for a fourth layer, make sure the paper genuinely needs it rather than adding depth for its own sake.

Level 4: indented, bold, ending with a period, text runs in

Level 4 changes the mechanics. The heading is indented like a paragraph, bold, in title case, and ends with a period, and the paragraph text runs directly into the same line right after the period, as a run-in heading, instead of starting fresh below it.

Inclusion criteria. Participants qualified for the study if they were enrolled full time and at least 18 years old at the time of testing.

This run-in format trips people up because it looks like a typo the first time you see it. It's exactly how APA 7 designed Levels 4 and 5 to save vertical space in longer, more granular papers, which is also why most short student papers never need them.

Level 5: indented, bold italic, ending with a period, text runs in

Level 5 is the deepest layer. It is indented and run in exactly like Level 4, but the heading text is bold and italicized together, and it still ends with a period.

Age verification. Age was confirmed against the university's enrollment record before the session began.

If your paper reaches Level 5, it is almost certainly a thesis, a dissertation chapter, or a long empirical paper with heavy subdivision. Most course papers will never need it, and reaching for it on a five-page assignment usually signals over-structuring rather than clarity.

The five APA heading levels, side by side

• Level 1: Centered, Bold, Title Case. New paragraph begins on the next line.
• Level 2: Flush Left, Bold, Title Case. New paragraph begins on the next line.
• Level 3: Flush Left, Bold Italic, Title Case. New paragraph begins on the next line.
• Level 4: Indented, Bold, Title Case, ending with a period. Paragraph text runs in on the same line.
• Level 5: Indented, Bold Italic, Title Case, ending with a period. Paragraph text runs in on the same line.

Every level uses the same font as the rest of your paper. Headings are not the place to switch to a display font or bump the size up, no matter how tempting that looks in a template.

Never skip a level, and never label the introduction

The mistake: jumping from a Level 1 heading straight to a Level 3, or opening the paper with a heading that says "Introduction."

APA 7 requires that headings descend in order. If your paper uses three levels, it uses Level 1, then Level 2, then Level 3, in that sequence, with no level skipped in between. A paper that goes from Level 1 directly to Level 3 is missing a Level 2, and a careful reader notices the gap in the outline even if they cannot name what feels off. It is an easy gap to leave, since nothing in Word or Google Docs flags it for you, which is why it often survives all the way into a final draft.

The introduction gets its own rule, and it surprises a lot of students the first time they hear it. APA 7 does not want a heading that says "Introduction," because the opening of the paper is understood to be the introduction by default. The paper's title, repeated at the top of the first page of text, does that job. Your first heading should be whatever comes after the introduction, usually Method.

Why it matters: both of these are mechanical rules a grader can check in seconds, and both are easy to get flagged on precisely because they are so mechanical. Our breakdown of why headings look wrong even when you think you followed the rules covers the subtler versions of this mistake, including the ones that survive a first read-through.

Set each level up as a Word style, not a one-off format

The fix: instead of manually bolding, centering, and italicizing each heading as you write it, build the format once as a style and apply it everywhere. In Word, go to the Home tab, open the Styles gallery, and either modify the built-in Heading 1 through Heading 5 styles to match the APA 7 specifications above, or create your own custom styles named Level 1 through Level 5. Once a style exists, applying it to a new heading is a single click, and every heading of that level stays identical without you having to remember the exact formatting each time.

This also protects you against the most common way headings drift over the course of a long paper: you format the first Level 2 heading correctly, then five pages later you eyeball a new one instead of copying the format exactly, and the bold weight or the spacing is slightly off. A style makes drift impossible because the formatting lives in one place.

If your document already has inconsistent headings scattered through it and you are staring down a rebuild, our full walkthrough of the complete APA 7th edition format, from margins to the reference list, puts headings in context with everything else a grader checks. And if you are working on a longer manuscript where these rules interact with the sixth-to-seventh-edition changes, see the piece on the APA 7th edition changes that still trip up graduate students.

Or skip the manual styling entirely

You can build all five styles by hand and audit every heading in the document before you submit. We built StyleMyPaper's heading detection because keeping five levels straight across a long paper is exactly the kind of detail that is easy to lose track of, even once you know the rules cold. Upload the draft and it applies the correct Level 1 through 5 formatting automatically, without touching your writing. See how the APA formatting tool handles it.