The 2010 Patient Protection and Affordable Care Act (ACA, P.L. 111-148) requires certain health insurers to provide consumer rebates if they do not meet a set financial target known as a medical loss ratio (MLR). At its most basic, a MLR measures the share of health care premium dollars spent on medical benefits, as opposed to company expenses such as overhead or profits. For example, if an insurer collects $100,000 in premiums and spends $85,000 on medical care, the MLR is 85%. In general, the higher the MLR, the more value a policyholder receives for his or her premium dollar. The ACA requires an annual, minimum 80% MLR for individual and small group insurance plans, and an annual, minimum 85% MLR for large group plans. Congress imposed the MLR to provide "greater transparency and accountability around the expenditures made by health insurers and to help bring down the cost of health care."