There are several ways to cover the cost of Harmony drug addiction treatment. One payment method you may find is a sliding fee scale (fee is based on earnings and other variables). This implies that the rehab adjusts their fees based on the client?s income, yearly taxes and other financial factors; in the end, the cost that a single client pays may not be the same as another. There are numerous 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 normally not be able to acquire treatment. Another reason for providing this payment option is that it provides the treatment facility with a tax deduction on the merit of donating their services as charity.