他们多少钱用英语怎么说

"How much money do they have?" 可以说成 "What is their net worth?"
"Net worth" 指的是一个人或公司拥有的资产减去负债后的总价值。
例句：
According to Forbes, his net worth is estimated to be $5 billion.
Forbes 的数据显示，他的身价估计为 50 亿美元。
The company's net worth increased by 20% last year.
公司的资产净值去年增长了 20%。