remaining money; balance
Refers to money left over after some has been spent, or the outstanding amount still owed. Common in financial contexts.
今月の残金はあと2万円しかない。
I only have 20,000 yen left for this month.
請求書の残金を来週までにお支払いください。
Please pay the remaining balance on the invoice by next week.
I have to pay off the remaining balance by next month.
I couldn't buy the item because I didn't have enough money left.
I checked my remaining balance at the ATM.