on commission

on commission idiom
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.

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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