The phrase "affect the interest" is correct and usable in written English.
It can be used when discussing how something influences or changes someone's interest or concern in a particular subject or matter.
Example: "The recent changes in policy may affect the interest of investors in the market."
Alternatives: "influence the interest" or "impact the interest".
But opting for an inheritance guarantee will reduce the amount you can borrow and may affect the interest charged.
Discussing the next steps it may take, the regulator said: "We will consider how intervening to improve the rates paid to consumers with older accounts would affect the interest rates paid on more recently opened accounts.
"[They] hurt the livelihood of the North Korean people before they affect the interest of their leadership, hell-bent on improving its nuclear arsenal," he wrote in the Korea Times.
Even though none of the problems listed seems to affect the interest of logical semantics, its applications are often handicapped by the nature of many of its basic concepts.
Therefore, the question whether budget deficits affect the interest rate is still inconclusive.
Natural changes during the life-span of the facility can drastically affect the interest of a particular location, twirling today's optimal location into an investment disaster.
In many cases, the lobbyists are selecting administration officials for departments that will affect the interests of firms they represent".
Next Steps 8. (SBU) Ambassador Struble noted that security problems in mining communities affect the interests of several countries.
Efforts to open the power sector to competition, for example, could affect the interests of relatives of Li Peng, a former prime minister.
"Whether Enron has a duty to indemnify officers and directors and whether the depletion of insurance coverage could affect the interests of shareholders are questions intertwined with the ultimate outcome of these still-nascent matters," Oregon's filing states.
Changes in banking and financial services, for instance, could affect the interests of the family of Zhu Rongji, China's prime minister from 1998 to 2003 and one of the architects of China's economic system.
