The level of assistance patients with Alzheimer’s disease (AD) require in their care may be an important predictor of resource use, costs of care and quality of life. The Dependence Scale (DS), a measure of care-assistance required, was used to estimate costs of care and quality of life of patients with AD categorized into six dependence stages based upon the summated item scores of the DS. Data was derived from a three-year, non-interventional study of 132 patients with probable AD (ages 50 to 85) and caregiver dyads. We investigated the association between DS scores and healthcare costs, health-related quality of life (HRQoL), caregiver burden and estimated annual costs and HRQoL for six dependence stages in adjusted models. DS scores were significant predictors of healthcare costs, HRQoL, and caregiver burden. The estimated annual healthcare costs and a measure of HRQoL (EuroQoL-5D) ranged from $11,418 and 1.00 for those at very mild dependence stage to $101,715 and 0.26 for those at very severe dependence stage. DS scores classified into six dependence stages provides a useful method to estimate unique levels of care-associated costs and health utilities for pharmacoeconomic evaluations of new treatments for AD.