A sliding-fee scale is a way of offering financial assistance that involves basing the cost of treatment on the income of the person paying for treatment.
For example, a therapist may charge $150 per session but offer a sliding-fee scale for people who can’t afford that amount.
The scale might mean that someone who makes less than a certain amount would only pay half the regular price, for instance. Clients might be asked to provide financial statements to receive this benefit.