on commission
Giving full or partial recompense for work done based on individual sale or service rendered. My normal salary is actually pretty abysmal, but the amount I can earn on commission when I sell a property more than makes up for it. My friend is an artist who earns her living painting elaborate scenes on commission for fans of various pop-culture shows and movies.
on commission
Making money based on sales or services rendered, as in Real estate agents rarely get a salary; they work largely on commission. This use of the noun commission, which generally refers to a percentage of the total price, dates from the early 1700s.
on commission
With a sales commission serving as full or partial recompense for the work done: sells boats on commission.