Definition
Due process of law is the constitutional requirement that government act through fair procedures before depriving a person of life, liberty, or property. The text appears twice in the Constitution:
- Fifth Amendment — binds the federal government.
- Fourteenth Amendment — binds the states.
The Fourteenth Amendment's Due Process Clause is the more consequential of the two — it is the vehicle through which most of the Bill of Rights has been applied to state governments.
Two kinds of due process
Key takeaways
Why "due process" has two doctrines under one phrase
The literal text says "due process of law" — a procedural phrase. For most of the 19th century courts read it that way. Substantive due process emerged later through interpretation: if "liberty" can be taken only by due process, the argument runs, then certain substantive liberties cannot be taken at all (because no process is "due" for revoking a fundamental right). This is the doctrinal move that allows the same six words to do both procedural and substantive work.
Procedural due process — the Mathews balancing test
When government deprives a person of life, liberty, or property, it must provide some level of process — but how much process is a balancing question.
| Factor | Pulls toward more process | Pulls toward less process | |---|---|---| | Private interest at stake | Large (welfare benefits, parental rights) | Small (small fine, minor inconvenience) | | Risk of erroneous deprivation | High under current procedures | Low under current procedures | | Value of additional procedures | Likely to materially reduce error | Diminishing returns | | Government interest | Modest administrative burden | Heavy administrative burden, emergency, national security |
Mathews v. Eldridge (1976) established this framework for evaluating procedural sufficiency in administrative contexts.
Substantive due process — the unenumerated rights vehicle
Incorporation — how the Bill of Rights became applicable to states
Example: How procedural due process plays out in practice
A state university wants to dismiss a tenured professor for alleged research misconduct. What process is due?
Applying Mathews:
- Private interest at stake. Continued employment and reputation — substantial.
- Risk of erroneous deprivation. Without a hearing, the dismissal rests on the institution's investigators alone. High risk of error.
- Value of additional procedures. A formal hearing with cross-examination materially reduces error.
- Government interest. Some efficiency cost, but the university already runs grievance processes.
Result: Due process requires notice of specific charges, access to the evidence, an opportunity to respond, and (likely) a neutral hearing panel. The exact procedures are negotiable; the core entitlement to meaningful process is not.
What about life, liberty, and property?
The clause's three protected interests are read broadly:
| Interest | Examples | |---|---| | Life | Capital punishment proceedings; medical decisions in custody | | Liberty | Physical confinement; restrictions on movement; reputational stigma plus tangible consequence; fundamental rights to marry, raise children, bodily autonomy | | Property | Real and personal property; statutory entitlements (welfare, government employment with for-cause protection); professional licenses |