There are several ways to cover the expense of Greenville 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 charges based on the client?s earnings, yearly taxes and other monetary components; in the end, the cost that a single person pays might not be the same as another. There are many 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 normally not be able to receive treatment. Another reason for offering this payment selection is that it offers the treatment facility with a tax deduction on the benefit of donating their services as charity.