can checkout (check out)

Writers often confuse checkout (one word) and check out (two words). Rule of thumb: check out (two words) is a phrasal verb meaning to examine, try, or leave; checkout (one word) names a place or process (the point of payment) or acts as an adjective that modifies that noun.

Quick answer

Use check out (two words) for the action. Use checkout (one word) for the place, process, or a noun-based modifier.

check out = verb (two words): Please check out the report.
checkout = noun/adjective (one word): The checkout line was long; the checkout page failed.
Quick test: Replace with "inspect" or "try" → two words. Replace with "counter" or "process" → one word.

Core explanation: verb vs. noun

Check out is a separable phrasal verb: the particle out can move (check it out). That movement signals an action and requires two words. Checkout is a single lexical item naming a thing or process and is written as one word when used as a noun or adjective (checkout counter, checkout flow).

Pronoun split test: If a pronoun can appear between the verb and out (check it out), use two words.
Substitute test: If "inspect" or "try" fits, use check out (verb). If "counter" or "process" fits, use checkout (noun).
Examples:
- Verb: Check out the appendix for the sources.
- Noun: The checkout closed at midnight.

One-glance proofreading rules

When you scan a document quickly, these signals pick the right form fast.

Is there an article (the/a) before it? → likely checkout (noun).
Is there an object or pronoun between check and out? → check out (verb).
Can you logically replace it with "inspect" or "try"? → check out (verb).
Can you replace it with "counter" or "process"? → checkout (noun).

Common wrong → right pairs

Copy these corrected lines when you need a quick fix.

Wrong: I need to checkout that book from the library.
Right: I need to check out that book from the library.
Wrong: Please checkout the attached file and confirm.
Right: Please check out the attached file and confirm.
Wrong: I'll meet you at the check out.
Right: I'll meet you at the checkout.
Wrong: Can you checkout this article for errors?
Right: Can you check out this article for errors?
Wrong: Checkout was slow and the customers complained.
Right: The checkout was slow and the customers complained.
Wrong: We need to checkout the new build before launch.
Right: We need to check out the new build before launch.

Real usage: workplace, school, and casual examples

Short, situational examples you can adapt.

Work: Please check out the staging site and confirm the new endpoint works.
Work: We improved the checkout flow to reduce abandoned carts.
Work: QA will check out the patch today; leave a note if you find a regression.
School: Check out the lecture slides under Week 4 before the seminar.
School: The library's checkout desk has new self-service kiosks.
School: Can you check out my bibliography for formatting issues?
Casual: Check out this playlist - perfect for studying.
Casual: I'm stuck at the checkout; the card reader isn't working.
Casual: You should check out that new taco truck this weekend.

Rewrite help: paste-and-go fixes

Templates and quick rewrites for common swaps.

Verb template: "Please check out [object]." (action = two words)
Noun template: "The checkout [noun phrase]." (place/process = one word)
Rewrite examples:
- Wrong: "Can you checkout my slides?" → Better: "Can you check out my slides?"
- Wrong: "I'll wait at the check out." → Better: "I'll wait at the checkout."
- Wrong: "We need to checkout eligibility before approving." → Better: "We need to check out eligibility before approving."
- Wrong: "The check out process failed during payment." → Better: "The checkout process failed during payment."
- Wrong: "Please check-out the options." → Better: "Please check out the options."
- Wrong: "User tried to checkout without logging in." → Better: "User tried to check out without logging in." (if action)

Try your own sentence

Test the whole sentence instead of the phrase alone: context usually makes the correct form obvious.

Hyphenation: is 'check-out' ever correct?

Hyphenating "check-out" is uncommon. Prefer "check out" for verbs and "checkout" for nouns or adjectives. A hyphen may appear only if a specific style guide or a rare compound-adjective rule requires it.

Default: no hyphen. Verb = check out; noun/adjective = checkout.
Rare exception: a policy title or strict house style might use "check-out" as a hyphenated modifier, but most editors avoid it.

Spacing: searching and batch-fixing mistakes

When reviewing a long document, search and inspect rather than blindly replacing.

Search for "checkout" (one word). For each hit, ask: is it naming a thing/process? If not, change to "check out".
Search for "check out" used where a noun is needed (e.g., "the check out") and fuse to "checkout".
If you use regex, find \bcheckout\b and check 1-2 surrounding words before replacing.

Grammar notes and edge cases

Phrasal verbs allow particle movement: "check it out" confirms the verb form. "Checkout" can act as an adjective (checkout page) but remains one word.

Separable phrasal verb example: "Check the feature out if you have time."
Adjective: "the checkout button" (one word used as modifier).
Informal "to check out" meaning "to die" is still a verb and written as two words; "checkout" never carries that meaning as a noun.
If a sentence still feels ambiguous, rewrite: "inspect" vs "the checkout counter."

Memory trick and quick checklist

Keep this small routine when proofreading.

Mnemonic: One word = one thing (checkout = thing/process). Two words = action (check + out).
3-step checklist when you see checkout/check out:
1. Is it naming a place or process? → checkout (one word).
2. Is it an action or will a pronoun go between? → check out (two words).
3. If unsure, replace with "inspect" (action) or "counter/process" (thing) to test.
Example check: "Please checkout this page" → try "inspect" (fails), so correct to "Please check out this page."

Similar mistakes and pairs to watch

Apply the same tests to other separable phrasal verbs that become nouns when fused.

log in (verb) vs login (noun)
set up (verb) vs setup (noun)
follow up (verb) vs follow-up (noun/adjective) - many guides allow the hyphen for the noun
check in (verb) vs check-in (noun/adjective) - parallels checkout vs check out

FAQ

Is 'checkout' one word or two?

As a noun or adjective, checkout is one word (the checkout line, the checkout page). As a verb, use two words: check out the document.

Can I write 'check-out' with a hyphen?

Hyphenating "check-out" is uncommon. Use "check out" for verbs and "checkout" for nouns/adjectives unless a specific style guide requires a hyphen.

Which is right in an email: "Please checkout the file" or "Please check out the file"?

"Please check out the file." You're asking for an action, so use two words.

Does British vs American English differ here?

No major dialect difference: both treat check out as the verb and checkout as the noun. Minor style-guide preferences may vary.

How do I fix multiple instances quickly in a long document?

Search for "checkout" and review each occurrence in context. Keep noun uses, change action uses to "check out." A context-aware grammar tool speeds the process by flagging likely misuses.

Want an automatic second opinion?

If you edit long documents, paste a passage into a grammar checker that evaluates context. Use the substitution tests here as a mental filter and let a tool catch the remaining hits.