Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
but one catch
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "but one catch" is correct and usable in written English.
It is typically used to introduce a condition or limitation that may affect the situation being discussed. Example: "The offer sounds great, but one catch is that you must sign a two-year contract."
✓ Grammatically correct
News & Media
Alternative expressions(3)
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
2 human-written examples
All but one CATCH practitioner was involved in the clinical care of children.
Science
But one catch is that getting an ARM may now be harder.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
56 human-written examples
The piece, about the creation of a social networking site, is heavy on the technology, but one catches oneself wishing that technology didn't make for the most vivid character in a play that still involves people, Jason Zinoman writes.
News & Media
Advertisements were running on the screen, something I normally ignored, but one caught my eye: "Have you considered becoming an egg donor?" I had heard of this before but knew almost nothing about it.
News & Media
But one caught his forehead, opening a gash.
News & Media
Dozens of photographs decorate the narrow living room of Nicole Paultre Bell's home in Far Rockaway, Queens, but one catches the eye more quickly than the rest.
News & Media
My pencil point (I had but one) caught in my coat and broke, and the world lost the prayer, a prayer that was only interrupted by the sobs of Stanton as he buried his face in the bedclothes.
News & Media
He remained a great manager, but one caught in the grip of a dream of long ago, still staring at a vision of beauty that faded and fell further into disuse as each year passed.
News & Media
"I know for a fact without naming them, we've got a few guys on our team who, if it wasn't for Chicago State, these guys wouldn't only be part of unemployment (statistics) but ones caught in something illegal or involved in life-or-death situations.
News & Media
But there is one catch.
News & Media
But there's one catch: You have to feel good.
News & Media
Expert writing Tips
Best practice
Use "but one catch" to introduce a caveat or limitation after presenting something seemingly positive or advantageous. This helps to manage expectations and provide a balanced view.
Common error
Don't forget to thoroughly explain the "catch". Briefly mentioning it without detailing its implications can mislead the reader and undermine your credibility.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "but one catch" functions as a transitional phrase, specifically a conjunction used to introduce a condition, limitation, or unexpected element that contrasts with what has been previously stated. Ludwig confirms its grammatical correctness and usability.
Frequent in
News & Media
65%
Formal & Business
15%
Wiki
10%
Less common in
Science
5%
Encyclopedias
3%
Social Media
2%
Ludwig's WRAP-UP
In summary, the phrase "but one catch" serves as a useful conjunction phrase to introduce a caveat or limitation. Ludwig confirms that it is grammatically correct and frequently found in news and media contexts. While versatile, using more formal alternatives is advisable in academic or highly professional settings. Remember to fully explain the "catch" to avoid misleading your audience and maintain credibility.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
but there's a drawback
Replaces "catch" with "drawback", emphasizing the negative aspect or disadvantage.
but there's a limitation
Substitutes "catch" with "limitation", highlighting a restriction or constraint.
however, there's a stipulation
Uses "stipulation" instead of "catch", suggesting a specific condition or requirement.
but there is a downside
Employs "downside" in place of "catch", focusing on the potential negative consequences.
but there is a snag
Replaces "catch" with "snag", implying a hidden problem or difficulty.
but there's a caveat
Substitutes "catch" with "caveat", indicating a warning or condition that should be noted.
however, there is a problem
Uses a more general term "problem" instead of "catch" indicating some issue or difficulty.
but there's a hitch
Replaces "catch" with "hitch", suggesting a minor difficulty or obstacle.
but one condition applies
Replaces "catch" with an explicit mention of a condition that affects the situation.
however, one requirement exists
Employs the word "requirement" instead of "catch" highlighting a mandatory condition.
FAQs
How can I use "but one catch" in a sentence?
Use "but one catch" to introduce a condition or limitation. For example, "The job offer is excellent, "but one catch" is that it requires frequent travel."
What phrases are similar to "but one catch"?
Alternatives include "but there's a drawback", "however there's a stipulation", or "but there is a downside". These phrases all introduce a condition or limitation to something previously stated.
Is it appropriate to use "but one catch" in formal writing?
While "but one catch" is widely understood, more formal alternatives like "however, there is a stipulation" or "however, a specific condition applies" might be preferable in academic or professional contexts.
What's the difference between "but one catch" and "however"?
"However" simply introduces a contrasting statement, whereas "but one catch" specifically introduces a limitation, condition, or drawback that affects the preceding statement. For example, "The plan sounds promising; however, funding is uncertain" versus "The plan sounds promising, "but one catch" is that it depends on securing external funding."
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested