There are many ways to cover the price of Waltham drug addiction treatment. One payment method you may uncover is a sliding fee scale (fee is based on income and other variables). This means that the rehab adjusts their costs based on the client?s income, yearly taxes and other financial factors; in the end, the price that a single client pays might not be the same as another. There are several reasons why a drug rehab would choose to present a sliding fee scale to their clients. They may pick to help out an addict who would normally not be able to obtain treatment. Another reason for providing this payment choice is that it provides the treatment facility with a tax deduction on the benefit of donating their services as charity.