APA Headings and Subheadings: All Five Levels Explained

Why APA Headings Make Student Papers Easier to Read

APA headings give your paper a clear structure, especially when your assignment includes several sections or complex ideas. Instead of making readers guess where one topic ends and another begins, headings show the order of your argument. APA headings follow five possible levels, but most student papers only need the first one or two. Knowing how the levels work helps you format research papers, literature reviews, lab reports, and longer academic assignments with confidence. Headings are just one component of APA format. Before applying the five heading levels, make sure your paper follows the correct APA rules for margins, fonts, spacing, citations, and references.

Before readers reach your first heading, they will see your APA title page. A properly formatted title page creates a professional first impression and ensures your paper starts in compliance with APA 7 guidelines.

The Five APA Heading Levels

APA 7th edition uses five heading levels. Each level has a different format and shows a different depth in your paper.

All headings remain double-spaced and use the same font and size as the rest of the paper. Do not add extra blank lines above or below them. APA headings are normally not numbered or labeled with letters unless an instructor or publication provides different requirements.

Level 1 Heading

Use Level 1 for the major sections of your paper.

Example: 

Level 2 Heading

Use Level 2 for subsections within a Level 1 section.

Example:

Level 3 Heading

Use Level 3 when a Level 2 section needs to be divided into smaller topics.

Example:

Level 4 Heading

Use Level 4 for more detailed subsections beneath a Level 3 heading.

Example:

Level 5 Heading

Use Level 5 only when another level of organization is necessary under Level 4.

Example:

Every page in your paper, including those with different heading levels, should display APA page numbers in the correct location. Consistent page numbering helps maintain a polished document and meets APA formatting standards.

How Many APA Headings Should You Use?

Use only the number of heading levels your paper actually needs. A short student essay may only need Level 1 headings, while a longer research paper may use Levels 1 and 2. More complex papers, such as theses or detailed lab reports, may need Levels 3, 4, or 5.

Do not skip levels. If you use a Level 3 heading, it should appear under a Level 2 heading, not directly under Level 1.

Common APA Heading Mistakes

Formatting headings by appearance

Writers sometimes choose a heading level because they prefer how it looks. Instead, select levels according to the paper’s structure: main section, subsection, sub-subsection, and so on. Adjusting the level only to make a heading smaller, italicized, or left-aligned produces an inaccurate hierarchy.

Putting Level 4 or 5 text on a new line

Levels 4 and 5 are run-in headings, so the paragraph must begin on the same line after the period. Pressing Enter after either heading incorrectly turns it into a separate display heading. Check these two levels carefully when converting formatting between word processors.

Using sentence case

APA headings use title case, not sentence case. For example, write Effects of Social Media on Sleep Quality, not Effects of social media on sleep quality. Keep capitalization consistent even for paragraph-style headings.

Adding unnecessary blank lines

APA papers are double-spaced throughout, including around headings. Do not add an extra blank line before or after a heading to create visual separation. Consistent spacing makes the hierarchy easier to recognize.

Quick APA heading checklist

Before submitting your paper, confirm that:

• The first main section uses Level 1.
• Heading levels appear in order without skipped levels.
• All headings use title case.
• Levels 1–3 begin on separate lines.
• Levels 4–5 end with periods and continue into the paragraph.
• Boldface, italics, alignment, and indentation match the selected levels.
• The paper remains double-spaced without extra blank lines.
• The introduction does not have an unnecessary Introduction heading.

Headings organize your writing, while citations identify the sources supporting it. After checking your APA headings, use the APA Citation Generator to draft reference entries and in-text citations, then compare every result with the original source information before submitting your paper.

APA headings improve the structure and readability of your paper, but proper citations are just as important for academic writing. After organizing your sections with the correct heading levels, use our APA Citation Generator to build properly formatted references that support every source you cite throughout your paper.