Small change: coins or small-denomination bills used for minor payments; loose change.
すみません、細かいお金がないので千円札で払えますか。
Sorry, I don't have small change—can I pay with a 1,000-yen note?
自動販売機は細かいお金しか使えないタイプだ。
The vending machine is the type that only accepts small change.
バスの運賃は細かいお金で払ってください。
Please pay the bus fare with small change.