What Is a Collateral Source, and What Is the Collateral Source Doctrine?
In torts, a collateral source is a source of compensation—other than the defendant—that is available to an injured party. Examples of collateral sources include: a plaintiff’s private insurance, Social Security, workers’ compensation, employee benefits (e.g., PTO), Medicare or Medicaid, the Affordable Care Act, etc. In general, collateral source rules, or the collateral source doctrine, prevent an injured person’s damages from being reduced by payments from collateral sources.
The collateral source doctrine maintains that any compensation an injured person has received from a source other than the party who is legally responsible for the injuries (the defendant) will not reduce the amount of damages recoverable from the defendant. The collateral source doctrine ensures that the at-fault party is held responsible for the full range of an injured person’s harm. In essence, collateral source rules prohibit a tortfeasor from transferring the financial liability resulting from an injury from themselves to a non-culpable third party, e.g., to an insurance company, or to a government subsidized program, i.e., to tax-paying members of the general public. Life Care Planners are often asked why they do not consider collateral sources when addressing the Third Basic Question of Life Care Planning: How much will the medically related goods and services cost over time? Answers to this question lie primarily in rules that govern the admissibility of expert testimony, as well as state-specific collateral source rules.