The average total cost of a rehab program in California is $56.654. However, the actual cost for you may vary depending on the type of rehab center you want to enroll in and the services they provide. Daily fees can ascend to $629.49 for patients looking for inpatient rehab without insurance. These costs can be significantly reduced depending on your insurance coverage. For those with 60% insurance coverage, costs can be around $251.80, while it can also be as low as $125.90 for an insurance coverage of 80%.