honorarium
noun [ C ]
formal uk/ˌɒnəˈreəriəm/ usplural honorariums | honorariaa sum of money paid to someone for providing a service or winning a prize:
The board will meet three times a year and members will be paid a $3,500 honorarium per meeting, plus expenses.
The O'Donnell Award for science consists of a $25,000 honorarium and an inscribed statue.