Due process

Type: Concept

Category: Civics

Difficulty: Beginner

Reading time: 6 min

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

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Procedural due process is about steps. Substantive due process is about substance.

Read it as: Two doctrines share the same constitutional text. Procedural (yellow) is about process: did the government follow fair steps? Substantive (purple) is about substance: are there things government cannot do regardless of process? The two doctrines have very different historical and political baggage despite sharing the same six words of constitutional text.

Key takeaways

Key takeaways

• Procedural due process asks: what fair procedures did the government provide before taking your life, liberty, or property?
• Substantive due process asks: are there things government cannot do to you no matter what procedures it follows?
• The 14th Amendment Due Process Clause is the vehicle for 'selective incorporation' — applying most Bill of Rights protections to state governments.
• Substantive due process is the more contested doctrine, used to protect unenumerated rights like marriage, family, contraception, and (until Dobbs) abortion.
• Most procedural due process cases turn on the Mathews v. Eldridge balancing test: the private interest at stake, the risk of erroneous deprivation, and the government's interest in efficient procedures.

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

Why substantive due process is controversial

Procedural due process is uncontroversial — the text explicitly demands “due process of law.” Substantive due process is more contested: it reads the clause to protect substantive rights (privacy, bodily autonomy, parental rights) not explicitly enumerated elsewhere in the Constitution.

Critics: this is invented constitutional law — judges using the Due Process Clause as a blank check for their preferred rights.

Defenders: the framers used capacious language (“liberty”) precisely so that the clause could protect interests they hadn’t foreseen.

Incorporation — how the Bill of Rights became applicable to states

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The incorporation doctrine moves a federal-only right to apply against state governments via the 14th Amendment.

Read it as: Incorporation is a one-by-one process, not a single sweep. The 14th Amendment opened the door (yellow); each Supreme Court case in the 20th century walks one specific right through it (purple). A handful of Bill of Rights provisions remain unincorporated (e.g., the grand-jury requirement of the Fifth Amendment).

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

Caveats

Caution

Dobbs v. Jackson Women’s Health Organization (2022) overruled Roe v. Wade and Casey on the ground that abortion was not “deeply rooted in this nation’s history and tradition” — applying a methodology that could narrow substantive due process more broadly. Other substantive-due-process precedents (contraception in Griswold, same-sex intimacy in Lawrence, same-sex marriage in Obergefell) rely on similar reasoning. Whether the Court applies Dobbs’s logic to them is an open question.

Related material

Related

Chapter 2: The Protection of Rights Due process as the conduit for selective incorporation of the Bill of Rights. Judicial review The mechanism by which due process arguments become binding law.