Run out of means to use all of something until none remains; it applies to time, budgets, patience, supplies, and other limited resources.
"We ran out of time before we could test the last feature."
"The team ran out of budget halfway through the quarter."
Why "run out of" is different from "out of" alone
Out of can describe a simple state or a lack; you may be outside something or lack it for any reason. Run out of usually describes a process of depletion instead. Something was available, people used it, and now it is completely gone.
"We're out of coffee." (a plain fact — could be for any reason)
"We ran out of coffee." (it was there, people drank it, and now it's finished — implies a process of depletion)
At work, run out of helps explain how a shortage developed. It shows that regular use gradually reduced the available supply. It does not suggest that a sudden failure caused the problem. This distinction matters when you explain shortages to managers or clients, and it can sound more exact and less alarming than "we don't have any."
"We ran out of runway for this feature before the release." (implies steady progress that hit a limit)
Want to get better at distinctions like this?
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See how Lyra Practice works →The grammar: "run out of" needs an object
Run out of is a three-part phrasal verb like put up with. Its object comes after of, which stays when an object follows.
Use the following grammatically correct form.
"We ran out of time."
The following form is grammatically incorrect.
"We ran out time."
When there is no object, drop of too. Context must make the missing object clear.
"The printer ran out." (of paper, understood from context)
"We're almost running out." (of whatever was already being discussed)
Common mistakes
Mistake 1: Dropping "of" when an object is stated.
The following example uses the wrong form.
"We ran out patience with the vendor."
The corrected version keeps the required preposition.
"We ran out of patience with the vendor."
Mistake 2: Using "run out of" for something that was never actually available in a limited quantity.
This example has a different and unintended meaning.
"I ran out of the meeting." (This sounds like leaving quickly, not depleting something — a different phrasal verb, "run out," without "of.")
To describe depletion clearly, use this form.
"I ran out of things to say in the meeting."
Mistake 3: Using the present tense when the past tense is meant.
The following example uses the wrong tense.
"We run out of budget last month."
The corrected version uses the required past tense.
"We ran out of budget last month."
Practice scenarios
Practice run out of in these situations.
- explain to a manager that a project lacks time or money
- flag low supplies, licenses, or resources before they are gone
- describe a point when you had no patience or ideas left
- warn a team before something is fully used up
Useful phrases to try.
- "We're about to run out of..."
- "We ran out of [X] before we could finish..."
- "At this rate, we'll run out of [X] by..."
- "Let's flag this now, before we run out of..."
Lyra Practice helps advanced non-native English professionals learn the nuance of high-value workplace expressions and practice using them in realistic scenarios, so their English sounds natural, precise, and senior at work. Try Lyra Practice.