There are a lot of ways to cover the expense of McGrath drug addiction treatment. One payment method you may find is a sliding fee scale (fee is based on earnings and other components). This indicates that the rehab adjusts their charges based on the client?s revenue, yearly taxes and other financial factors; in the end, the price that a single client pays may not be the same as another. There are a number of 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 acquire treatment. Another reason for offering this payment possibility is that it provides the treatment facility with a tax deduction on the benefit of donating their services as charity.