差額

1. Origins, structure, and basic meaning

• Structure: 差額 is read as さがく and is a noun for the difference between two monetary amounts or the balance to be paid or refunded.
• Basic usage: Calculation appears in 差額を計算する, while paying a balance appears in 差額を支払う.

2. Common pitfalls and similar expressions

• Difference and settlement
  • It can be a stated price difference or the remaining amount settled in a payment or exchange.
• Difference from 差
  • 差 covers differences in values, degrees, or ability generally; 差額 is specifically a difference expressed in money.