1. interest rate 利率

2. simple interest 單利

3. compound interest 復利

4. legal interest 法定利息

5. prime rate 優待利率

6. payable interest 應付利息

7. lending rate 貸款利率

8. usury 高利貸

常用句型：

1. What's the interest rate for the savings account?

儲蓄存款的利率是多少？

2. Do you pay interest on this account?

這種存款付給利息嗎？

3. Please tell me what the annual interest rate is.

請告訴我年利率是多少。

4. Interest is paid at the rate of 1% per annum at present.

目前每年的利率是1%。

5. It allows you to earn a little interest on your money.

這可使你從存款中獲得一點利息。

6. The account carries interest of 4%.

該存款有4%的利息。

7. The interest is added to your account every year.

每年的利息都加到你的存款中。

8. The interest rate for the savings account is 4%.

儲蓄存款的利率是4%。

9. It varies from time to time. At present it is 6%.

（年息）每個時期都不同，現在是六厘。