There are quite a few ways to cover the cost of Chesterfield drug addiction treatment. One payment method you may come across is a sliding fee scale (fee is based on income and other factors). This means that the rehab adjusts their charges based on the client?s income, yearly taxes and other monetary variables; in the end, the expense that a single person pays may not be the same as another. There are many reasons why a drug rehab would select to offer a sliding fee scale to their clients. They may choose 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.