Result
Yes. "Due" is an adjective (or a noun in "Dues"), and adjectives are capitalized in every style guide. In the phrase "due to," "Due" is capitalized and "to" stays lowercase: "Delays Due to Weather."
"Due" by Style Guide
| Style guide | "Due" mid-title | Why |
|---|---|---|
| AP | Capitalize | Adjectives are major words |
| APA | Capitalize | Adjectives are major words |
| Chicago | Capitalize | Adjectives are major words |
| MLA | Capitalize | Adjectives are major words |
| AMA | Capitalize | Adjectives are major words |
| Bluebook | Capitalize | Adjectives are major words |
Examples in Chicago Style
- Delays Due to Weather
- The Rent Is Due
- Credit Where Credit Is Due
- Due Diligence for New Writers
Only "to" in "due to" follows the small-word rule. See "to" for how every guide treats it.
For the short list of words that do stay lowercase, see the full list of words that stay lowercase.
"Due" in Sentence Case
APA reference lists, many news sites, and most UI text use sentence case instead of title case. There, only the first word and proper nouns get capitals, so "due" is lowercase unless it starts the title: "Delays due to weather." Pick one of the two styles for a whole set of headings rather than mixing them.
Quick Answers
Should "due" be capitalized in a title?
Yes. "Due" is an adjective, and every style guide capitalizes adjectives in title case.
Is "due" capitalized in APA?
Yes. APA capitalizes major words, including adjectives, regardless of length.