量ㄌㄧㄤˋ入ㄖㄨˋ為ㄨㄟˊ出ㄔㄨliàngrù‑wéichū

简量入为出

  1. 根據收入情況來確定支出多少。例 「過日子要精打細算，量入為出」。

英to assess one's income and spend accordingly (idiom)​; to live within one's means, You can only spend what you earn.