You’ve probably typed it both ways without a second thought “all time favourite” one day, “all-time record” the next. You’re not alone. Even experienced writers stumble over this small but meaningful punctuation choice. The truth is, both forms exist in standard English, but they are not interchangeable. Knowing which one to use and when can make the difference between polished, professional writing and something that quietly undermines your credibility.
This guide breaks it all down: what each form means, why the hyphen exists, how to use both correctly in real sentences, and the most common mistakes to avoid.
What Does “All Time” or “All-Time” Mean?
Before diving into the grammar rules, it helps to understand what the phrase actually means in each form.
All time (two words, no hyphen) functions as a noun phrase. It refers to the entire span of history or existence “the whole of time.” It usually appears after a verb or preposition, completing a thought rather than directly describing a noun.
All-time (hyphenated) functions as a compound adjective. It describes a noun and signals that something is the greatest, highest, lowest, or most extreme of its kind across all of history. The hyphen is what binds the two words together into a single descriptive unit.
Think of it this way: when you say a song is your favourite “of all time,” you’re talking about a period. When you call a song your “all-time favourite,” you’re describing it and that’s where the hyphen earns its place.
Why Is All-Time Hyphenated?
The reason comes down to a standard rule in English grammar: compound adjectives that appear before a noun should be hyphenated.
When two or more words work together as a single modifier in front of a noun, a hyphen is used to show they function as one idea. This prevents confusion and makes sentences easier to read.
Consider the difference:
- “An all time record” — Is “all” modifying “time,” or are both words modifying “record” together?
- “An all-time record” Clear: both words combine to describe the record as the greatest ever.
The hyphen removes ambiguity instantly.
This rule is supported by major style authorities:
| Style Guide | Ruling |
|---|---|
| AP Stylebook | Hyphenate compound modifiers before nouns |
| Chicago Manual of Style | Hyphens improve clarity for compound adjectives before nouns |
| Merriam-Webster Dictionary | Lists “all-time” with a hyphen for adjective usage |
All three agree: position determines form. Before a noun → hyphen. After a verb or preposition → no hyphen.
All Time or All-Time in Real Sentences
Correct Usage Examples
Here are clear, real-world examples of each form used properly:
Using “all-time” (hyphenated — before a noun):
- The company reported an all-time high in quarterly revenue.
- She is considered an all-time great in women’s tennis.
- That album is my all-time favorite I’ve listened to it hundreds of times.
- The post reached an all-time record for engagement on that platform.
- It was an all-time low for customer satisfaction scores.
Using “all time” (no hyphen after a verb or preposition):
- He is widely regarded as the greatest basketball player of all time.
- That film ranks among the best comedies of all time.
- The discovery is considered one of the most important in all time.
- She will be remembered as one of the finest writers of all time.
Notice the pattern: “all-time” sits directly before a noun (high, great, favorite, record, low), while “all time” follows a preposition like “of.”
Incorrect Usage Examples
These are the kinds of mistakes that appear often in blogs, social media captions, and even news headlines:
| Incorrect | Correct | Why |
|---|---|---|
| That was an all time great performance. | That was an all-time great performance. | Compound adjective before “performance” needs a hyphen |
| She holds an alltime record. | She holds an all-time record. | “Alltime” as one word is never correct in standard English |
| He’s the greatest of all-time. | He’s the greatest of all time. | After a preposition, no hyphen needed |
| The movie is an all time classic. | The movie is an all-time classic. | Directly modifying “classic” requires the hyphen |
The single biggest takeaway: “alltime” as one solid word is always wrong. It is never the correct form in standard American or British English.
Context Variations
The correct form can shift depending on the writing context. Here’s how “all time” and “all-time” appear across different fields:
Business and Finance Writing The hyphenated form dominates here. Phrases like “all-time high,” “all-time low,” and “all-time record” appear regularly in earnings reports, financial news, and market analysis. The hyphen ensures precision essential in professional documents where clarity matters most.
Sports Journalism Sports writing uses “all-time” constantly: “all-time leading scorer,” “all-time win record,” “all-time great.” After a player retires, the tribute pieces almost always reach for this hyphenated form. “Greatest of all time” (without the hyphen) also appears frequently, often abbreviated as GOAT.
Entertainment and Pop Culture Reviewers use “all-time favorite” to describe films, songs, and albums. The phrase signals a personal or cultural peak something that transcends a moment and becomes a lasting standard.
Casual Writing and Social Media Online, the hyphen often disappears simply because people aren’t thinking about grammar. “All time favorite” and “all time best” are extremely common on social platforms. While readers understand the meaning, the missing hyphen is technically incorrect when the phrase precedes a noun.
Common Mistakes with All Time or All-Time
Even skilled writers get this wrong. Here are the most frequent errors and the thinking behind them:
1. Dropping the hyphen before a noun This is the most common mistake. Writers say or hear “all time great” and write it exactly that way, without pausing to consider whether the phrase is modifying a noun. It is so the hyphen belongs.
2. Using “alltime” as a single word This form does not exist in standard English. It is not listed in any major dictionary and is not accepted by any major style guide. Always write it as two words or two hyphenated words.
3. Hyphenating after a preposition Phrases like “greatest of all-time” are technically incorrect. Once the phrase moves to a position after a verb or preposition, it no longer acts as a compound adjective and the hyphen should be dropped.
4. Being inconsistent within one piece of writing Using “all-time” in one sentence and “all time” in the same modifying role two paragraphs later can confuse readers and signal a lack of editing care.
How Do You Remember the Hyphen?
Grammar rules are easier to retain when you have a mental shortcut. Here are two that work:
The “before the noun” test Ask yourself: Is the phrase sitting directly in front of a noun and describing it? If yes, use the hyphen. If the phrase comes after a verb or preposition, leave it open.
- “An all-time [noun]” → hyphen
- “… [noun] of all time” → no hyphen
The substitution test Try swapping in “record-breaking” or “best-ever” in place of “all-time.” If the swap feels natural, you’re in adjective territory and you need a hyphen.
- “She is a record-breaking favorite” ✓ → “She is an all-time favorite” ✓
- “She is considered the greatest record-breaking” ✗ → “She is considered the greatest of all time” ✓
When Should You Use Each Form?
Here’s a simple decision guide to settle the question in any writing situation:
Use all-time (with hyphen) when:
- The phrase comes directly before a noun
- You are describing something as the best, highest, lowest, or most extreme ever
- The two words function together as a single descriptive unit
- Examples: all-time high, all-time favorite, all-time low, all-time record
Use all time (without hyphen) when:
- The phrase follows a preposition such as “of” or “in”
- You are referring to the entire span of history or existence
- The phrase is not directly modifying a noun
- Examples: of all time, the greatest of all time, in all time
Never use:
- Alltime one word, always incorrect in standard English
Conclusion
The choice between “all time” and “all-time” is not arbitrary it follows a clear, logical rule. When the phrase acts as a compound adjective and sits before a noun, the hyphen is necessary. When it functions as a noun phrase following a preposition, leave it open. That single question does this phrase directly describe a noun? is all you need to get it right every time.
Small details like this one are what separate writing that feels polished from writing that feels rough around the edges. Once you internalize the rule, you’ll notice the mistake everywhere and you won’t make it yourself.
FAQs
Is “all time” one word or two?
“All time” is always written as two separate words (or hyphenated as “all-time”). The one-word form “alltime” does not exist in standard English.
Is it “greatest of all time” or “greatest of all-time”?
The correct form is “greatest of all time” no hyphen. The phrase follows a preposition here, so it functions as a noun phrase, not a compound adjective.
Should I write “all-time high” or “all time high”?
Always write “all-time high.” Because the phrase directly precedes and modifies the noun “high,” the hyphen is required.
Does British English use “all-time” the same way American English does?
Yes. The hyphenation rule for compound adjectives is consistent across both American and British English. “All-time” is hyphenated before a noun in both varieties.
Is “all-time” correct after a verb, like “the score is all-time high”?
In this case, “the score is at an all-time high” would be the natural phrasing. If “all-time” still directly precedes the noun “high,” the hyphen is correct regardless of the sentence structure.
Can I write “all-time” after the noun it modifies?
Typically, no. Once a compound adjective follows the noun, the hyphen is usually dropped. “The record is an all-time high” uses the hyphen correctly; “the record, considered all time, was impressive” would not require one.
Why do so many websites and publications get this wrong?
Because spoken English doesn’t differentiate between the two forms they sound identical. Writers often transcribe speech rather than thinking about grammatical function, which leads to the missing hyphen in print.
