hyphen in 'write up'

'Write up' changes form with its job in the sentence. If it names a thing (a report), use write-up. If it describes an action (to put something into writing), use write up. Hyphenation also appears when the phrase works as a compound adjective before a noun.

Below: a quick rule, clear tests you can use in your head, many copy-ready wrong/right pairs, rewrites for common sentences, and related compounds to watch for.

Quick answer

Use write-up (hyphen) for nouns and compound adjectives before a noun. Use write up (two words) for the verb phrase.

Noun (hyphen): I handed in the write-up.
Verb (no hyphen): I will write up the report.
Adjective before a noun (hyphen): the write-up guidelines

Core explanation: noun vs. verb vs. adjective

If the phrase names a thing, treat it as a noun and hyphenate. If it's an action, keep the words separate. If it modifies a noun that follows, hyphenate as a compound adjective.

Noun examples: the write-up, a write-up, several write-ups
Verb examples: to write up, she will write up, we wrote up
Adjective-before-noun: write-up instructions, write-up deadline

Hyphenation and spacing: exact punctuation rules

Use a single hyphen with no spaces for the noun or compound adjective: write-up. Use two separate words for the verb: write up. Avoid en dashes, extra spaces, or unapproved closed forms unless your style guide permits them.

Correct noun: a write-up
Correct verb: to write up
Wrong forms to avoid: write - up, write-up (en dash), writeup (closed, except by house style)

Grammar note: verb inflections and pluralization

Verb inflections stay on the verb (writes up, wrote up, writing up). Nouns pluralize after the hyphen (write-ups). Avoid hyphenating verb forms like wrote-up; instead rewrite the sentence.

Verb: she writes up the notes / she is writing up the notes
Noun plural: several write-ups
Rewrite example: instead of "the wrote-up report," say "the report written up by the team"

Examples: common wrong/right pairs (copy-paste fixes)

These pairs cover meetings, HR notes, deadlines, emails, studies, and casual posts. Use them as templates: swap nouns or names and keep the corrected hyphenation.

Wrong: I will write-up the meeting minutes tonight. /
Right: I will write up the meeting minutes tonight.
Wrong: Please attach your write up to the email. /
Right: Please attach your write-up to the email.
Wrong: He received a write up for tardiness. /
Right: He received a write-up for tardiness.
Wrong: Make sure to write-up a short summary for stakeholders. /
Right: Make sure to write up a short summary for stakeholders.
Wrong: The write up deadline is Friday. /
Right: The write-up deadline is Friday.
Wrong: Are you going to write-up the client notes? /
Right: Are you going to write up the client notes?
Wrong: Upload your write up to the portal by noon. /
Right: Upload your write-up to the portal by noon.
Wrong: Should I write-up the bug report now? /
Right: Should I write up the bug report now?
Wrong: He posted a write up about the concert. /
Right: He posted a write-up about the concert.
Wrong: We'll write-up the proposal after the meeting. /
Right: We'll write up the proposal after the meeting.
Wrong: The product write up is in the drive. /
Right: The product write-up is in the drive.
Wrong: Can you write-up a blurb for my profile? /
Right: Can you write up a blurb for my profile?
Wrong: She needs a write up for the incident report. /
Right: She needs a write-up for the incident report.
Wrong: Please write-up your reflections in the Google Doc. /
Right: Please write up your reflections in the Google Doc.
Wrong: We scheduled a follow up and a write up. /
Right: We scheduled a follow-up and a write-up.
Wrong: I will writeup the notes later. /
Right: I will write up the notes later.

Try your own sentence

Test the whole sentence rather than the phrase alone. Context usually makes the correct form obvious. Use the quick tests below if you get stuck.

Rewrite help: fix your sentence in three steps + ready rewrites

Checklist: 1) Can you add "a" or "the"? If yes → noun → hyphenate. 2) Can you add "to" before it naturally? If yes → verb → two words. 3) If the result sounds clumsy, swap in "summary," "report," or rewrite the clause.

Step 1: Insert "the" or "a". If it fits → use write-up.
Step 2: Try "to" + phrase. If it reads naturally → use write up.
Step 3: If awkward, rewrite: "a summary" or "the report that..."

Rewrite:
Original: Please write-up the analysis before Monday. / Fix: Please write up the analysis before Monday.
Rewrite:
Original: The write up format is attached. / Fix: The write-up format is attached.
Rewrite:
Original: She wrote-up the incident in her notes. / Better: She wrote about the incident in her notes. (or She wrote up the incident in her notes.)
Rewrite:
Original: He needs a write up for HR. / Fix: He needs a write-up for HR. /
Alternative: HR needs a written report about him.
Rewrite:
Original: The write-up report is due. / Fix: The write-up is due. Or: The report write-up is due.

Real usage and tone: work, school, and casual examples

Business and academic writing prefer the hyphen for nouns; casual writing is more forgiving but the same tests apply.

Work: The quarterly write-up is due on Friday; email your draft to me.
Work: Can you write up the client meeting highlights before lunch?
Work: He received a formal write-up following the HR review.
School: Your lab write-up should include methods, results, and discussion.
School: Please write up your experiment results using the template.
School: Several students turned in late write-ups and lost points.
Casual: I'll write up a quick note about what happened at the party.
Casual: He posted a short write-up of his trip to Lisbon.
Casual: Can you write up a blurb for my profile? (verb - two words)

Memory trick and style notes

Mnemonics: the "article test" and the "to test." If you can place "the/a" before it → noun → write-up. If "to" naturally precedes it → verb → write up.

Style note: Some outlets accept writeup as one word for nouns. When in doubt, use write-up for clarity or follow your house style.

Article test: the write-up → hyphen
To test: to write up → two words
When unsure, rewrite with "summary" or "report" to remove ambiguity

Similar mistakes to watch for

The same pattern applies to many compounds: follow up, set up, check in, close up, back up. Hyphenate when naming a thing (a follow-up); keep it open when it's an action (to follow up).

follow up (verb) vs. follow-up (noun)
set up (verb) vs. set-up (noun) - note: setup is sometimes accepted as closed for nouns
check in (verb) vs. check-in (noun); back up (verb) vs. back-up (noun)

Usage: Wrong: I'll follow-up next week. /
Right: I'll follow up next week. / But: We scheduled a follow-up.
Usage: Wrong: Please check-in at reception. /
Right: Please check in at reception. / But: The check-in desk is to your left.

FAQ

Should I always hyphenate write-up?

No. Hyphenate when it's a noun or a compound adjective before a noun (the write-up, write-up instructions). Do not hyphenate when it's a verb phrase (to write up the notes).

Is writeup acceptable as one word?

Some publications and informal writing use writeup as a closed form. Check your style guide. For formal or unfamiliar audiences, write-up (hyphen) is the safest noun form.

How do I pluralize write-up?

Pluralize after the hyphen: write-ups. For verb uses there is no plural; use verb inflection instead (writes up, wrote up).

What if my sentence becomes clumsy with "write-up"?

Rewrite: swap in "summary," "report," or rephrase the clause (for example, "a report on X" or "the report that X wrote").

Are verb forms ever hyphenated (writing-up / wrote-up)?

Avoid hyphenating verb forms. Use "writing up," "wrote up," "writes up." If you need an adjective, rewrite: "the report written up by the team" instead of "the wrote-up report."

Quick check tip

If unsure, apply the article and to tests or paste one sentence into a grammar checker. Small hyphen fixes keep emails and assignments looking professional.