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
onus is on
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "onus is on" is correct and usable in written English.
This phrase is used to describe someone or something that has a responsibility to take action in a given situation. Example: The onus is on the government to ensure that all citizens have access to quality healthcare.
✓ Grammatically correct
News & Media
Formal & Business
Alternative expressions(20)
it is up to
it's their responsibility
responsibility lies with
duty falls upon
accountability rests with
they are in charge of
the buck stops with
responsibility rests with
the obligation lies with
the onus rests with
the duty lies with
responsibility falls upon
responsibility lays on
it's up to
responsibility falls on
the onus is on
responsibility is on
the obligation is upon
liability falls on
responsibility comes on
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
56 human-written examples
"The onus is on him.
News & Media
The onus is on them.
News & Media
The onus is on Europe to respond.
News & Media
"The onus is on us," he said.
News & Media
But the onus is on the EU.
News & Media
The onus is on you.
News & Media
So the onus is on us.
News & Media
Now the onus is on us.
News & Media
"The onus is on the district attorney.
News & Media
The onus is on the government: what should be secret?
News & Media
So the responsibility, the onus, is on Assad.
News & Media
Expert writing Tips
Best practice
Use "onus is on" to clearly and directly assign responsibility for a specific action or outcome. This phrasing is suitable for both formal and informal contexts.
Common error
Avoid using "onus is on" when the responsibility is shared or unclear. Ensure that the subject you are assigning responsibility to has the authority and capacity to fulfill the obligation.
Source & Trust
89%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "onus is on" functions primarily to assign responsibility or obligation to a specific entity. Ludwig's examples clearly illustrate this function across various contexts, indicating that the responsibility for a particular action or outcome rests with the mentioned party. It's a direct way of pointing out who needs to take action.
Frequent in
News & Media
69%
Formal & Business
15%
Science
4%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "onus is on" is a frequently used phrase that effectively assigns responsibility. According to Ludwig, it's grammatically correct and serves to clearly place a demand on someone to act. The phrase is most commonly found in news and business contexts, indicating a neutral to professional register. While there are many alternative phrases, such as "responsibility lies with" or "it is up to", the phrase "onus is on" remains a direct and clear way to express where a responsibility lies. When writing, be sure that the responsibility you assign is both clear and feasible for the entity in question.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
responsibility lies with
Replaces "onus" with "responsibility" and uses "lies with" instead of "is on."
burden rests on
Substitutes "onus" with "burden" and employs "rests on" instead of "is on," emphasizing the weight of the responsibility.
duty falls upon
Replaces "onus" with "duty" and uses "falls upon" to highlight the obligation.
it is up to
Offers a more informal alternative, replacing "onus" with "it" and restructuring the sentence.
accountability rests with
Substitutes "onus" with "accountability" focusing on the aspect of being answerable.
the task is for
Replaces "onus" with "task," shifting the focus to a specific job or assignment.
the obligation is with
Emphasizes the binding nature of the responsibility.
it's their responsibility
A more direct and less formal way of expressing the same idea.
the ball is in their court
An idiomatic expression indicating that it is someone else's turn to act.
they are in charge of
Focuses on the authority and control aspect of the responsibility.
FAQs
How can I use "onus is on" in a sentence?
Use "onus is on" to indicate that someone has a duty or responsibility to do something. For example, "The "onus is on" the company to ensure the safety of its employees."
What's a less formal alternative to "onus is on"?
Alternatives include "it is up to" or "it's their responsibility", which are more suitable for casual conversations.
What is the difference between "onus is on" and "responsibility lies with"?
While similar, "onus is on" emphasizes a burden or duty, whereas "responsibility lies with" simply states where the accountability resides. The choice depends on the specific nuance you want to convey.
Is "onus is on" appropriate for formal writing?
Yes, "onus is on" is appropriate for formal writing, especially in legal, business, or academic contexts. It clearly and concisely assigns responsibility.
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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