noun
Refers to paying more than the required amount, either accidentally or intentionally.
税金の払い過ぎが判明した。
It turned out that I had overpaid my taxes.
払い過ぎた分は返金されます。
The overpaid amount will be refunded.
Synonymous compound noun, often used in legal or financial contexts (e.g., 過払い金). 払い過ぎ is more colloquial and descriptive.
Compound of 払い (the continuative form of 払う 'to pay') + 過ぎ 'excess, too much'.