There are a lot of ways to cover the expense of Williamstown drug addiction treatment. One payment method you may uncover is a sliding fee scale (fee is based on income and other components). This signifies that the rehab adjusts their costs based on the client?s earnings, yearly taxes and other economic components; in the end, the price that one client pays may not be the same as another. There are several reasons why a drug rehab would choose to provide a sliding fee scale to their clients. They may pick to help out an addict who would normally not be able to receive treatment. Another reason for providing this payment choice is that it provides the treatment facility with a tax deduction on the merit of donating their services as charity.