noun
late fee; overdue charge; arrears
A fee or charge incurred when a payment is overdue, such as for library books, rent, or bills. Often used in formal or business contexts.
図書館の本を返すのが遅れたので、延滞料を払った。
I paid a late fee because I returned the library book late.
家賃の支払いが遅れると延滞料がかかります。
If the rent payment is late, a late charge will be incurred.