In a transaction, something extra on the side.
A handout.
A tip or gratuity.
A bribe.
An extra sum given as a premium, e.g. to an employee or to a shareholder.
Something extra that is good; an added benefit.
An addition to the player's score based on performance, e.g. for time remaining.
One or more free throws awarded to a team when the opposing team has accumulated enough fouls.
To pay a bonus, premium