There are quite a few ways to cover the price of Northampton 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 revenue, yearly taxes and other economic variables; in the end, the expense that a single client pays may not be the same as another. There are a number of 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 in any other case not be able to acquire treatment. Another reason for supplying this payment selection is that it provides the treatment facility with a tax deduction on the benefit of donating their services as charity.