in interest

in (one's) (own) interest

Beneficial to one. It would be in your interest to have your lawyer review the contract before you sign it. Of course Ryan won't help us—that selfish jerk doesn't do anything that isn't in his own interest. The work experience you get now will be in your interest when you start looking for a job after college.

See also: interest

Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.

in one's (own) (best) interest(s)

to one's advantage; as a benefit to oneself. It is not in your own interests to share your ideas with Jack. He will say that they are his. Jane thought it was in the best interest of her friend to tell his mother about his illness.

See also: interest

McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.