noun
repaying a debt after achieving success; promise to repay after success
Refers to an arrangement where a debt is repaid later, once the borrower has become successful or financially stable. Often used in informal or personal contexts, such as between students or young professionals.
学生時代に借りたお金は出世払いで返すよ。
I'll pay back the money I borrowed during my student days once I'm successful.
My senior helped with my tuition on the promise that I'd repay it after I make it.