vested interest
US /ˈves.tɪd ˈɪn.trəst/
UK /ˈves.tɪd ˈɪn.trəst/

1.
interesse adquirido, interesse pessoal
a personal stake or involvement in an undertaking or state of affairs, especially one with an expectation of financial or other gain
:
•
As a shareholder, he has a vested interest in the company's success.
Como acionista, ele tem um interesse adquirido no sucesso da empresa.
•
The politician's decision was influenced by his vested interest in the new development project.
A decisão do político foi influenciada pelo seu interesse adquirido no novo projeto de desenvolvimento.