| Subject | English | Russian |
| bank. | act in the best interest of | действовать в интересах (akimboesenko) |
| law | act in the best interest of | действовать к наибольшей выгоде (кого-либо – напр., клиента sankozh) |
| busin. | act in the best interests of one's client | действовать в интересах клиента (“All the business models have been about making money. But we’re supposed to be acting in the best interests of our client.” (vancouversun.com) ART Vancouver) |
| econ. | act in the interests of | действовать в интересах (кого-либо) |