How will the money deducted from freelancers won't affect me that much?

[Btaliat]

Most times, there are some times that some freelancers will complain that the money they get from freelancing is not enough especially after they have deducted some money from them. Freelancers should be smart enough to know how to make sure that they are not shortchanged. They can add all the money that will collect to the money that they will charge the clients. What other things can freelancers do to make sure they are not shortchanging?