There are a lot of ways to cover the price of Iva drug addiction treatment. One payment method you may uncover is a sliding fee scale (fee is based on income and other factors). This means that the rehab adjusts their fees based on the client?s earnings, yearly taxes and other financial factors; in the end, the cost that one individual 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 normally not be able to acquire treatment. Another reason for offering this payment possibility is that it offers the treatment facility with a tax deduction on the merit of donating their services as charity.