There are many ways to cover the expense of Mc Grath drug addiction treatment. One payment method you may come across is a sliding fee scale (fee is based on earnings and other factors). This signifies that the rehab adjusts their costs based on the client?s revenue, yearly taxes and other monetary factors; in the end, the price that one particular individual pays may not be the same as another. There are various reasons why a drug rehab would choose to offer a sliding fee scale to their clients. They may select to help out an addict who would otherwise not be able to receive treatment. Another reason for providing this payment option is that it offers the treatment facility with a tax deduction on the merit of donating their services as charity.