payoff
Definitions
A payment made to someone, especially as a bribe or in settlement of a debt.
The final return or benefit resulting from an investment, effort, or undertaking.
The climax or resolution of a story or situation.
Examples
The long hours of studying finally resulted in a big payoff when she aced her final exam.
Investing in high-quality equipment may be expensive initially, but the long-term payoff is worth the cost.