There are several ways to cover the price of Foley drug addiction treatment. One payment method you may discover is a sliding fee scale (fee is based on income and other variables). This implies that the rehab adjusts their fees based on the client?s revenue, yearly taxes and other monetary components; in the end, the expense that one client pays may not be the same as another. There are many reasons why a drug rehab would choose to present 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 supplying this payment choice is that it offers the treatment facility with a tax deduction on the merit of donating their services as charity.