The Right to Travel: Durational Residency Explained

A woman moves from one state to another and applies for benefits she would receive as a long-settled resident. The state pays her less, or makes her wait a year, on the ground that she has only just arrived. That single fact pattern is the whole of the modern Fourteenth Amendment Privileges or Immunities Clause.

The clause forbids any state to abridge the privileges or immunities of citizens of the United States. Read broadly, it might have been the engine of federal rights against the states. The Slaughterhouse Cases (1873) read it narrowly instead, and incorporation had to run through the Due Process Clause. What survived, and what Saenz v. Roe (1999) revived, is the right to travel.

Diagram of the right to travel under the Fourteenth Amendment Privileges or Immunities Clause showing the durational residency trigger, strict scrutiny, and which waiting periods have been struck down or upheld — Fig. 46 · The right to travel: clause, trigger, standard, and which waiting periods survive.

Three components, three different homes

Saenz is worth reading closely because it separates the right to travel into three parts, each protected by a different provision. The first is the right to enter and leave a state, which is structural and needs no textual hook. The second is the right to be treated as a welcome visitor rather than an unfriendly alien while temporarily present, which is Article IV’s job. The third is the right of a newly arrived citizen to be treated on equal terms with other citizens of the state she has chosen, and that is the Fourteenth Amendment component.

Keeping the three apart solves most of the confusion in this area. If the plaintiff is a visitor from another state complaining about discrimination, the claim is Article IV comity. If the plaintiff has moved in and is being treated as a second-class member of her new state, the claim is Fourteenth Amendment privileges or immunities.

The trigger: durational residency

The clause is engaged by durational residency classifications — rules that divide the state’s own residents by how long they have lived there. Bona fide residence requirements are not the problem. A state may insist that you genuinely live within its borders before it treats you as a resident, and it may verify the fact. What it may not casually do is make you wait, once you genuinely live there, before you are treated like everyone else.

Where the trigger is satisfied, the standard is strict scrutiny: the classification must be necessary to a compelling state interest. Because durational requirements are almost always defended on budgetary grounds, and cost saving is not a compelling interest, most of them fail. Shapiro v. Thompson (1969) struck down a one-year wait for welfare, reasoning that withholding subsistence penalises the act of moving. Saenz struck down a subtler version: California paid newcomers only what their previous state would have paid, which the Court treated as the same penalty in different clothing.

Exam tip: distinguish a bona fide residence requirement from a durational one. The first asks whether you live here. The second asks how long you have lived here, and only the second triggers strict scrutiny.

Which requirements survive

The pattern in the decided cases turns on how severely the waiting period punishes migration and how closely the benefit is tied to something the state genuinely needs time to establish.

Durational requirement	Outcome
One-year wait for welfare benefits	Struck down — Shapiro v. Thompson
Newcomers capped at their former state’s benefit level	Struck down — Saenz v. Roe
One-year wait for non-emergency state medical care	Struck down — subsistence-level need
One-year residence for reduced in-state university tuition	Upheld — a subsidy, not a necessity
One-year residence before filing for divorce	Upheld — Sosna v. Iowa, a genuine forum interest
Bona fide residence with no waiting period	Valid — no durational classification at all

Six durational requirements and how they fared.

The unifying idea is not the length of the wait but what is being withheld. Where the benefit is necessary for survival, the waiting period operates as a penalty on the decision to move and cannot be justified. Where the benefit is a subsidy that the state funds for its established community, or where the state has an independent reason to require settled residence before acting — as a divorce court does before dissolving a marriage — the requirement survives.

Why equal protection usually rides along

Modern courts often resolve durational residency cases under the Equal Protection Clause rather than privileges or immunities, because equal protection has the more developed apparatus: a fundamental right triggers strict scrutiny, and the right to travel is fundamental. The two routes reach the same destination in nearly every case, and the safe practice is to plead both.

There is also a doctrinal frontier worth knowing about. Justice Thomas has argued that the Privileges or Immunities Clause, not the Due Process Clause, should be the vehicle for applying the Bill of Rights to the states, a position he set out in McDonald v. City of Chicago (2010). It is not the law. Incorporation still runs through due process, and the clause remains narrow. But a question that asks which clause “should” do the work of incorporation is asking about that debate.

Worked example

State P funds a treatment programme for rare diseases and limits access to residents who have lived in the state for at least two years. A citizen who moved there one year ago is refused, and sues.

She wins. The rule classifies the state’s own residents by duration of residence, so the trigger is satisfied and strict scrutiny applies. State P will defend on cost and on the idea that resources should go to those who have contributed longest, but neither is a compelling interest; the Court rejected precisely that reasoning in Shapiro. Nor is a two-year wait necessary to any legitimate end the state can identify, since verifying genuine residence takes weeks rather than years. Because the benefit withheld is medical treatment rather than a discretionary subsidy, the case sits on the Shapiro side of the line.

Change one fact. Suppose the programme is a scholarship rather than a treatment, and the wait is one year. Now the state is much better placed. A tuition-style subsidy is not necessary for survival, the one-year period tracks the recognised in-state tuition cases, and the classification is likely to be upheld.

Common mistakes that cost points

Confusing the two privileges clauses. Article IV protects visitors from other states; the Fourteenth Amendment protects a state’s own newcomers.
Treating every residence requirement as unconstitutional. Bona fide residence rules are perfectly valid.
Assuming a one-year wait is always fatal. The tuition and divorce cases went the other way.
Accepting fiscal savings as a compelling interest. It never is.
Forgetting the equal protection alternative, which most courts actually rely on.
Stating that the clause is the vehicle for incorporation. That is a concurring view, not current doctrine.

Frequently asked questions

Is the right to travel in the constitutional text?

Not by name. It is assembled from several sources: the structure of the union for the right of movement itself, Article IV for the treatment of visitors, and the Fourteenth Amendment Privileges or Immunities Clause for the equal treatment of new residents.

Does the right to travel cover international travel?

Only weakly. Movement abroad is treated as a liberty interest subject to reasonable regulation rather than as a fundamental right attracting strict scrutiny, which is why passport and visa restrictions are analysed very differently from interstate residency penalties.

May a state require residence before allowing someone to vote?

It may require bona fide residence and a reasonable registration cut-off for administrative reasons, but long waiting periods aimed at newcomers do not survive. The permissible period is measured by what election administration actually needs.

The right to travel: California’s landmark cases and 2026 practice

California has produced the two decisions that define this right, which makes it an unusually rewarding topic to localise. In Edwards v. California (1941) the Court struck down a state statute making it a crime to bring an indigent person into California, a Depression-era measure aimed at migrants from the Dust Bowl states. Nearly six decades later, Saenz v. Roe (1999) invalidated a California statute that limited welfare benefits for new residents to the amount payable in their former state during their first year.

Saenz is the case worth knowing cold, because it identified three components of the right and located the third in the Privileges or Immunities Clause of the Fourteenth Amendment, one of the very few modern decisions to give that clause real work. The components are the right to enter and leave a state, the right to be treated as a welcome visitor, and the right of a new resident to be treated the same as long-standing residents.

Where durational residency issues arise in Los Angeles County:

Benefit programmes cannot discount new arrivals. County general assistance and state aid must be calculated on the same terms for recent and established residents.
Tuition residency rules survive. A one-year requirement for reduced tuition has been upheld as a bona fide residence test rather than a penalty on migration.
Voting residency requirements must be short. Brief periods tied to administrative necessity are permissible; long ones are not.
Divorce and licensing residency rules differ. Section 2320 of the California Family Code requires a period of residence before a California dissolution, and such rules have generally been sustained.
Bona fide residence is not the same as duration. Requiring that someone actually live in the county is lawful; requiring that they have lived there for a year to receive equal treatment usually is not.
Homelessness policy sits in this shadow. Measures that effectively penalise arrival, rather than regulate conduct, invite Edwards arguments.

In 2026, distinguish a genuine residence requirement from a durational penalty, because that single distinction resolves most problems. Read with Article IV privileges and immunities, equal protection and the incorporation doctrine.

Next steps

Read this next to the Article IV Privileges and Immunities Clause, its constant companion in exam questions, then the three levels of scrutiny for the standard the trigger unlocks, and the state action doctrine for the threshold every Fourteenth Amendment claim must cross.

For primary sources, read Saenz v. Roe on Justia and Shapiro v. Thompson also on Justia, review the Fourteenth Amendment on Cornell Legal Information Institute, and confirm current subject coverage with the State Bar of California.