their interest vs their interests

Both 'their interest' and 'their interests' are correct, but they are used in different contexts. 'Their interest' is used when referring to a singular shared interest or a specific topic, while 'their interests' is used when talking about multiple interests or hobbies of a group of people.

Last updated: March 30, 2024 • 5300 views

their interest

This phrase is correct when referring to a singular shared interest or a specific topic.

Use 'their interest' when talking about a singular shared interest or a specific topic that a group of people have in common.

Examples:

Their interest in art led them to visit the museum together.
What is their interest in this project?
The team focused on their interest in environmental sustainability.

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Such a scheme may also enable the competent authorities to prioritise investment projects according to their interest for the region concerned.
The Council and the Commission are re-assessing their interest for the Community.
The amendment aims to give access to an internal review also to the members of the public where their interest is concerned.
However, neither of the importers put forward arguments according to which the imposition of anti-dumping duties would be against their interest.
Now their interest has faded, along with the macroeconomic numbers.
It is in their interest for you to survive.
Therefore, we must revive their interest in the political process.
It can thus be concluded that prolongation of measures is not in their interest.
In contrast, the Member States have recently confirmed their interest in concluding an ambitious and balanced agreement with Korea.
I am flattered by their interest but I am clearly escorting another lady.
I believe it would be in their interest to do so.
Harming us is no longer in their interest.
It is consistent with the general approach of the report but requests the members of the public to justify their interest in review.
The UK authorities note that BE's shareholders give up 97,5 % of their interest in BE's equity capital.
Indeed one would have thought it was in their interest to do so.
This puts a considerable damper on their interest and readiness to engage in the social dialogue.
It's in their interest to keep a low profile, especially after their identities are erased off the box.
They came out when it was in their interest to come out...
Following the notice of initiation, over thirty parties made themselves known and declared their interest in the proceeding.
- Parties requesting access to confidential information should submit detailed, substantiated requests that clearly demonstrate their interest in specific documents in terms of the right of defence.

Alternatives:

the interest they share
the common interest
the specific interest

their interests

This phrase is correct when referring to multiple interests or hobbies of a group of people.

Use 'their interests' when talking about the various hobbies or interests of a group of people.