Anytime vs Any Time: One Word or Two?

Reviewed by the Grammarlyzer Editorial Team · Our Review Standards · Published January 22, 2026 · Updated June 13, 2026

Adverb vs Noun Phrase in Real Sentences

📌 Quick Answer
Anytime is usually an adverb meaning whenever. Any time is a noun phrase meaning an amount of time.

Memory Trick: After prepositions like "at" and "for," use any time.

💡 Key Difference

Informal writing often uses "anytime" broadly, but formal writing keeps the distinction.

Quick Comparison

Form Use It For Quick Check
Anytime an adverb meaning "whenever" Swaps with whenever: call anytime / call whenever. Never after a preposition.
Any time a noun phrase meaning "an amount/point of time" Required after at, for, in: at any time. Accepts "any amount of time."

The Two Tests That Decide It

Two substitutions resolve almost every case. If "whenever" fits, you want the one-word adverb. If a preposition is in front, or "any amount of time" fits, you want two words.

Sentence What fits Use
Call me ___. "whenever" → call me whenever anytime
Do you have ___ today? "any amount of time" → do you have any time any time
You may cancel at ___. preposition "at" in front any time

Common Mistakes

❌ Incorrect:

Do you have anytime tomorrow?

✓ Correct:

Do you have any time tomorrow?

This asks about an amount of available time — a noun phrase — so two words. You could say "any free time," which only works split.
❌ Incorrect:

You can visit at anytime.

✓ Correct:

You can visit at any time.

A preposition ("at") must be followed by a noun phrase, and the one-word adverb can't fill that slot. "At anytime" is always wrong — likewise "for any time," "in any time."
❌ Incorrect:

I didn't waste anytime getting started.

✓ Correct:

I didn't waste any time getting started.

"Waste" needs an object (a thing), and the thing is "any time" (an amount). The adverb "anytime" can't be wasted, scheduled, or measured.
❌ Incorrect:

Stop by any time; you're always welcome.

✓ Correct:

Stop by anytime; you're always welcome.

Here it means "whenever you like" with no preposition, so the one-word adverb is the natural choice. (Two words isn't strictly wrong here, but "anytime" reads better.)

Good to Know

"Anytime" is relatively new and still informal-leaning

The one-word adverb only became common in 20th-century American English. It's fully standard now in casual and business writing, but in very formal prose some editors still prefer "at any time." When in doubt in a formal document, two words is never wrong.

"Anytime" as a conjunction

It can also mean "whenever" linking two clauses: "Anytime you need help, just ask." That's standard and idiomatic — equivalent to "whenever you need help."

The whole family doesn't behave the same

Unlike "anytime," the forms any one, any way, and any more change meaning when closed up (anyone, anyway, anymore). See anymore vs any more for that pair.

🎯 Test Your Knowledge

1. Feel free to message me ___.

2. I do not have ___ for extra meetings.

3. You can unsubscribe at ___.

4. Thanks for the help! — Sure, ___!

5. We didn't have ___ to lose before the deadline.

See It Live: Check a Sentence With Our Engine

Want proof the anytime vs any time rule holds up? The box below runs Grammarlyzer's engine on your text in real time. The starter sentence (“Do you have anytime tomorrow?”) already contains a slip—edit it or paste your own to watch the engine react.

The correct version is: "Do you have any time tomorrow?".

Honest limits: the engine catches the spacing, but anytime (whenever) versus any time (a quantity, and after a preposition) depends on meaning. Pick the sense first, then confirm the fix.

Frequently Asked Questions

Is "anytime" acceptable in emails?

Yes, especially in casual emails. For formal tone, keep the grammar distinction.

Why is it always "at any time" and never "at anytime"?

The preposition "at" must be followed by a noun phrase, and "any time" is the noun phrase. The adverb "anytime" cannot serve as the object of a preposition, so "at anytime" is incorrect.

What's the quickest test?

Swap in "whenever." If the sentence still works ("call me whenever"), use the one-word "anytime." If a preposition like "at" or "for" sits in front, or you mean "any amount of time," use two words.

Can "anytime" start a sentence as a conjunction?

Yes: "Anytime you're ready, we'll begin" means "whenever you're ready." That conjunction use is standard and idiomatic in both casual and business writing.

Deep Dive

Anytime is usually adverbial and conversational (whenever), while any time stays noun-like and quantifiable.

When you can insert "at", "for", or "about", the two-word form normally feels stronger.

Practical Use Cases

This distinction shows up in scheduling, customer support, marketing copy, and everyday conversation.

Context How to Choose
Adverb Use "anytime" when it means "whenever": "You can call anytime."
Noun phrase Use "any time" after "at" or when you mean an amount of time: "Do you have any time today?"
Formal writing If the sentence is about availability or duration, the two-word form is often clearer.

Why This Mistake Happens

The one-word form is common in casual writing, but it cannot replace every noun phrase. Prepositions are the strongest clue.

Mini Checklist

  • If "whenever" fits, "anytime" can work.
  • After "at," write "any time."
  • If you mean an amount of time, keep two words.

How Grammarlyzer Can Help

Grammarlyzer may flag spacing choices, but context tells you whether the phrase means "whenever" or "some amount of time."

You can compare this rule with Prepositions & Spacing and Awhile vs A While.

Related Articles

Anytime vs Any Time in Professional and Everyday Writing

In professional communication, the two-word form "any time" is consistently safer because it works in all positions and with all prepositions. Customer service teams writing scripts and auto-responses frequently use the adverb "anytime" in the sense of "whenever you need help, contact us anytime," which is perfectly correct. But the same teams sometimes write "contact us at anytime" — which requires "any time" because the preposition "at" demands a noun phrase, not an adverb. In formal business correspondence, especially client-facing materials, using "any time" throughout eliminates this risk entirely and signals careful editing to the reader.

In academic and formal writing, the distinction becomes more pronounced. Research articles and reports rarely use either form as a casual adverb; instead, "any time" appears in quantitative or scheduling language: "Participants could withdraw at any time during the study," or "Measurements were taken at any time a threshold event was recorded." In these contexts, "anytime" would be grammatically problematic because the preposition "at" forces the two-word noun phrase. Academic style guides tend to favor explicit, precise language over collapsed compound forms, so "any time" is generally the preferred choice in scholarly contexts even where "anytime" might also be defensible.

In casual writing — text messages, informal emails, social media — "anytime" has largely won the usage battle and most readers do not distinguish between the two. Phrases like "feel free to call anytime" and "message me anytime" are natural, standard informal usage. The error that casual writers make is the opposite: using "anytime" after prepositions ("at anytime," "for anytime," "in anytime"), producing grammatically incorrect constructions. A good rule of thumb is to check the word that comes immediately before: if a preposition precedes the word in your sentence, you need the two-word noun phrase "any time" regardless of how informal the tone of your writing.

The Preposition Signal

Scan left from your word to the nearest content word or preposition. If you see "at," "for," "in," "during," or "without" immediately before the word, write "any time" — the preposition signals that a noun phrase must follow. If the word follows a verb directly with no preposition, "anytime" (meaning "whenever") is the natural adverb choice: "Call me anytime." This one check handles the large majority of real-world cases.

Editing Questions About Anytime vs Any Time

Is "anytime" in "anytime soon" correct?

Yes. "Anytime soon" is a fixed idiomatic phrase meaning in the near future, and "anytime" functions as an adverb modifying "soon." The phrase appears in both formal and informal writing: "We do not expect results anytime soon" is standard and widely accepted. "Any time soon" is also seen occasionally, but the one-word adverb form is the established idiomatic choice here. This is one of the few phrases where "anytime" is so entrenched that almost no style guide or grammar checker challenges it, even in fairly formal contexts.

Can "any time" come at the end of a sentence?

Yes, and when it does, it is always the two-word form: "You can reach me any time" means you are available at any point in time, framing "any time" as a noun phrase. Interestingly, "anytime" at the end of a sentence is also accepted in informal usage with the same meaning, making end-of-sentence position one of the more ambiguous spots for this pair. The clearest guidance is: if you mean "at whatever point in time," the two-word form "any time" is always grammatically defensible regardless of position, while "anytime" can substitute in most positions except directly after a preposition.

Does British English handle "anytime" differently?

British English has historically been more conservative and prefers the two-word form "any time" in most contexts, treating "anytime" as an Americanism. British newspapers, academic journals, and formal correspondence commonly use "any time" where American writers might choose "anytime." However, "anytime" has been gaining ground in British informal writing, particularly in digital communication, under the influence of American media and tech company copy. If you are writing for a British audience or publication, defaulting to "any time" is the safer choice and will never be marked as an error.

How does this compare to the everyday/every day distinction?

The anytime/any time pair follows the same logic as everyday/every day, and also closely mirrors awhile/a while and anymore/any more. In each case, the one-word form is a more specific grammatical category — an adverb or compound adjective — while the two-word form preserves the noun phrase that can follow a preposition or take a determiner. Learning any one of these pairs gives you the conceptual framework to handle all of them: ask whether the word follows a preposition, ask whether it modifies a noun, and ask whether a determiner like "any" or "every" is functioning as an adjective before a noun. The answers point you to the correct form.

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