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
it is obligatory
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "it is obligatory" is correct and usable in written English.
You can use it when stating that something is required or mandatory in a particular context. Example: "In order to participate in the event, it is obligatory to register in advance."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Alternative expressions(20)
it is a must
it is mandatory
it is of utmost interest
it is of utmost relevance
it is of substantial importance
it is inevitable
it is of utmost significance
it is a necessity
it is optional
it is indispensable
it is crucial
it is of utter importance
it is forced
it is of enormous importance
it is required
it is of extreme importance
it is compulsory
one must
it is vital
it is critical
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
60 human-written examples
"It is obligatory that" may also be read personally, but non-agentially as "it is obligatory for Jones that" ( Krogh and Herrestad 1996) We will return to these issues again below.
Science
Here we choose to read the basic operator as "it is obligatory that" so that all continuity with permissibility, impermissibility, and indifference is not lost, as it would be with the "it ought to be the case that" reading.
Science
Indeed, it is obligatory.
News & Media
(It is obligatory to add that he hated the place).
News & Media
It is obligatory these days in a polite society to have a complicated attitude toward success.
News & Media
Under certain interpretations of the Talmud, it is obligatory to kill a rodef in order to save the intended victim.
News & Media
My own feeling is that even in America, there are some to whom it is obligatory to lie.
News & Media
It is obligatory for the commencement speaker to throw in a few local references to give the appearance of being intimately familiar with the territory.
News & Media
It is obligatory in this type of play to have all arguments represented, but Ms. Diaz does a fine job of making her lines more than perfunctory.
News & Media
Since it is obligatory in a World Cup to have a "group of death" we must conclude that Australia are in it.
News & Media
No one mandates prenatal testing, although it is such an automatic part of the regimen that many expectant mothers believe it is obligatory, and few fight it.
News & Media
Expert writing Tips
Best practice
When using "it is obligatory", ensure the context clearly establishes who is obligated and what the obligation entails to avoid ambiguity.
Common error
Avoid using "it is obligatory" in casual conversations or informal writing, as it can sound overly formal or stilted. Opt for simpler alternatives like "you have to" or "you must" in those situations.
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it is obligatory" functions as an impersonal construction to express a strong sense of duty or requirement. It serves to impose an obligation on an unspecified subject, often implying a rule, law, or moral imperative. As Ludwig AI confirms, it indicates that something must be done.
Frequent in
Science
61%
News & Media
33%
Encyclopedias
4%
Less common in
Formal & Business
2%
Reference
0%
Social Media
0%
Ludwig's WRAP-UP
In summary, "it is obligatory" is a phrase used to express that something is required or mandatory, often due to a rule, law, or moral principle. Ludwig AI confirms its grammatical correctness and usability. Its usage is most common in formal and scientific contexts, as demonstrated by Ludwig's examples, which come from scientific journals, news articles, and encyclopedias. While it effectively conveys a sense of duty, it can sound overly formal in casual settings. Consider using synonyms like "it is compulsory" or "it is mandatory" depending on the specific context. When using this phrase, make sure to clearly define the subject of the obligation to prevent any misunderstandings.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
it is compulsory
Replaces 'obligatory' with 'compulsory', offering a direct synonym with virtually identical meaning and force.
it is mandatory
Substitutes 'obligatory' with 'mandatory', emphasizing the enforced nature of the requirement.
it is required
Uses 'required' in place of 'obligatory', slightly softening the tone while maintaining the sense of necessity.
it is essential
Replaces 'obligatory' with 'essential', highlighting the importance of the action or item.
it is necessary
Similar to 'required', but with an emphasis on need rather than imposed obligation.
one must
Expresses obligation through a more direct and personal construction using 'must'.
it is imperative
Emphasizes the urgent and crucial nature of the obligation, conveying a higher level of importance.
it is a must
Simplifies the phrase to a more colloquial expression indicating something indispensable.
it is binding
Suggests that something is legally or morally obligatory.
duty demands
Uses 'duty' to express the obligation in a more formal or moral context.
FAQs
What does "it is obligatory" mean?
The phrase "it is obligatory" means that something is required, mandatory, or necessary due to a law, rule, or moral principle. It indicates a duty or obligation that must be fulfilled.
When is it appropriate to use "it is obligatory"?
The phrase "it is obligatory" is most appropriate in formal writing, legal documents, or situations where emphasizing the binding nature of a requirement is important. In more casual settings, simpler alternatives may be preferable.
What can I say instead of "it is obligatory"?
You can use alternatives like "it is compulsory", "it is mandatory", or "it is required" depending on the context.
Is "it is obligatory" the same as "it is necessary"?
While similar, "it is obligatory" implies a binding duty or requirement, whereas "it is necessary" simply indicates that something is needed or essential. Obligation carries a stronger sense of enforcement or moral imperative.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested