There are many ways to cover the price of Waterfall drug addiction treatment. One payment method you may come across is a sliding fee scale (fee is based on earnings and other factors). This implies that the rehab adjusts their fees based on the client?s income, yearly taxes and other financial components; in the end, the expense that one particular individual 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 choose to help out an addict who would otherwise not be able to obtain treatment. Another reason for offering this payment possibility is that it offers the treatment facility with a tax deduction on the merit of donating their services as charity.