1. Affluent、well-off等是比较常用的表达：
Her family was very well-off.
她的家庭非常富有
I heard that she has a wealthy uncle.
我听说她有个非常有钱的叔叔。
He is becoming more and more affluent.
他越来越有钱了。
2. 也有不太礼貌的表达：
He inherited the family business - he must be loaded!
他继承了家族产业——肯定富得流油！
They're filthy rich.
这些人都太特么有钱了。
3. 近几年又兴起了一个说法——the one percent，“财富塔顶端的那1%”：
It's easy to get by in society when you're part of the one percent.
这个社会就是富人好办事儿。
4. 如果一个人从小就有钱，可以用privileged：
She had a privileged upbringing.
她是含着金汤匙长大的。
5. “新富”和“承袭祖荫”也各有说法：
These new money millionaires have been coming in and building these huge mansions in the area.
新晋的百万富翁们不断涌入，在那个地方建豪宅。
She comes from an old money family.
她家祖上就很有钱。
（中国日报网）