The Six-Month Rule and Its Exceptions
The six-month period looks arithmetical and generates more argument than any other part of interstate custody law, because families do not live in tidy blocks and the word consecutive has to absorb everything they actually do.

The rule in short
The six-month period is counted backwards from the day the proceeding began and must be consecutive, but a temporary absence from the state counts as part of the period rather than breaking it. That single allowance carries most of the difficulty: courts must decide whether a given absence was a pause or a departure, and they do it on the surrounding arrangements rather than on stated intentions. A separate rule covers children under six months old.
A rule that says six consecutive months sounds like the kind of thing a calendar settles. In practice it is the most litigated element of interstate custody law, because the lives it is applied to include separations, trial reconciliations, extended stays with relatives, summers in another state and moves that were meant to be temporary and were not.
Counting the period
Backwards from commencement. The six months runs immediately before the proceeding began, so the anchor is the filing date rather than any event in the family's history. Nothing that happens after filing changes the count.
Commencement is a procedural question. Which document starts a proceeding, and when it is treated as filed, is answered by the law of the state where it was filed. In a contested situation where both parents are preparing to file, days can matter.
Living, not merely present. The child must have lived in the state, which describes where their life was based rather than a tally of nights. A child based in one state throughout has lived there even with substantial time spent elsewhere.
With a parent or a person acting as one. The living arrangement has to include a parent or someone standing in that role. A child living independently, or with a relative while both parents were elsewhere, raises a distinct question about whose household it was.
The period must be unbroken. Two separate stretches of four months do not aggregate. What prevents that rule from being brutal is the treatment of temporary absences, which is where the analysis actually happens.
Temporary absences
They count as part of the period. The act provides directly that a period of temporary absence is counted as part of the six months. Without that provision almost no family would satisfy the definition.
The act does not define temporary. Courts have filled the gap with a practical approach that asks whether the family's arrangements changed or merely paused.
Indicators of a pause. The home retained, the school place held, possessions left in place, a return date, employment continuing, a lease still running. Each of these says the base did not move.
Indicators of a departure. A lease ended, furniture moved, a new school enrollment, a job started, a new lease signed. These say a new life began, and a new period with it.
Intentions asserted afterwards carry little. Both parents in a contested case will characterize the same absence in opposite ways. What decides it is the documentary record made at the time, which is why the ordinary paperwork of a household — leases, enrollments, employment records — turns out to matter so much, as it does throughout how a child's home state is identified.
| Absence | Counts toward the six months | Reason |
|---|---|---|
| A two-week holiday | Yes | Temporary absence |
| A summer with a grandparent | Usually | Temporary absence |
| A school term away | Usually | Intention to return |
| A move with the intention to stay | No | Presence ended |
| A stay in a shelter in another state | Fact-specific | Depends on intention |
The infant rule
A separate definition for the very young. For a child less than six months old, the home state is the state in which the child has lived since birth with a parent or a person acting as a parent.
It exists out of necessity. A newborn cannot satisfy a six-month requirement, and without a special rule no state would qualify for any child under half a year old.
Temporary absences apply here too. Time in a hospital in another state, or a visit to family, is treated the same way as under the general rule.
Birth in a state does not settle it. Where a child is born in one state and the household is in another, the question is where the child has lived since birth, not where the delivery occurred. A birth during a visit does not create a home state.
The rule expires. Once the child passes six months, the general definition applies, so the answer can change with the child's age even if nothing about the family has altered.
The statute preserves the count through temporary absences without saying what makes an absence temporary, so the argument is about intention at the time. Records that show a return ticket, a retained lease, an enrollment kept open or a school place held are what establish it, and they are ordinary documents that nobody keeps unless they know the question is coming.
When the period does not close
Recent moves produce a gap. A family that relocated two or three months before filing has no home state, and this is common rather than exotic.
The case does not fail. The act moves to a significant-connection analysis, allowing a state where the child and a parent have a real connection, and where substantial evidence about the child exists, to take jurisdiction.
Evidence tends to point backwards. Schools, doctors, therapists and neighbors are usually in the state just left, which frequently makes it the appropriate forum despite the family having gone.
Wrongful removal does not start a clock. A parent who takes a child across a line without authority does not build a home state by waiting, and courts have power to decline jurisdiction where a party has behaved unjustifiably, together with power to order return and costs.
Two courts may need to speak. Where proceedings are commenced in two states close together, the act requires the courts to communicate and one to defer. That mechanism, and what happens when it is not used, is described in when two states both claim authority.
Practical consequences for families
Keep the ordinary paperwork. Leases, school enrollment records, employment letters and medical registrations are what establish where a child's life was based. Families going through a separation rarely think of these as evidence and they are precisely the evidence a court wants.
Document the character of an absence at the time. Where a child goes to stay with relatives for an extended period, a short written agreement between the parents recording that the arrangement is temporary and stating a return date costs nothing and settles an argument that can otherwise consume a hearing.
Understand what a move starts. Relocating begins a new six-month period in the destination and does not immediately end the old state's status, since the old state's period ran until departure. There is a window in which neither is the home state, described in how a child's home state is identified.
Do not assume waiting improves the position. Where a removal was without authority, time does not cure it, and the delay may itself become an issue in the proceedings that follow.
Take the jurisdictional question first. Money spent arguing about arrangements in a court that turns out to lack jurisdiction is money spent twice. The order of operations matters more here than in almost any other family matter, for the reasons set out in registering a custody order in a second state.
There is a further wrinkle that catches families whose children split time between two households in different states. Where a child spends the school year with one parent and long vacations with the other, the school-year state is generally the home state, because that is where the child's life is based and the vacations are temporary absences. The arithmetic can look close — nine months against three — and the analysis is not really arithmetical: it asks where the base is. A parent who assumes that accumulating enough weeks will shift the answer has misread the test, and a parent who extends a summer stay in the hope of doing so has usually created a wrongful retention rather than a new home state.
Points to carry away
- The period runs backwards from the commencement of the proceeding.
- It must be consecutive, but temporary absences are counted as part of it.
- Whether an absence was temporary is decided on arrangements, not on intentions asserted later.
- A child under six months is governed by a separate since-birth rule.
- An incomplete period moves the analysis to significant connections rather than defeating it.
Questions readers ask
Which date is the proceeding commenced?
Generally the date the first pleading seeking a custody determination is filed, which is a question of the filing state's procedure rather than of the uniform act. This matters because the entire six-month count depends on it, and because in a contested situation both parents may be filing within days of each other. Where two proceedings are commenced in different states close together, the courts are expected to communicate and one will defer, so the precise sequence can determine which court ultimately decides.
Does the child have to be in the state for the whole six months?
The child must have lived in the state for the period, and living in a place is not the same as being continuously physically present in it. That is what the temporary absence allowance recognizes. A child who spent three weeks with grandparents in another state, a fortnight on holiday and a week in a specialist hospital across a border has still lived in the home state throughout, provided the household and the arrangements stayed put. What matters is where the child's life was based, not the sum of nights.
What if a parent removed the child to another state during the period?
An unlawful removal or retention does not create a home state in the destination, and the act contains provisions specifically preventing a party from benefiting from wrongful conduct. Courts also have power to decline jurisdiction where a party has engaged in unjustifiable conduct. The practical consequence is that a parent who takes a child across a line and waits six months has generally not achieved what they intended, and may face an order to return the child together with a costs award.
Sources
- 28 U.S.C. § 1738A — Full faith and credit given to child custody determinationslaw.cornell.edu
- Uniform Law Commission — Child Custody Jurisdiction and Enforcement Actuniformlaws.org
- 42 U.S.C. § 663 — Use of Federal Parent Locator Servicelaw.cornell.edu
- U.S. Department of State — International Parental Child Abductiontravel.state.gov
- National Center for State Courts — Family Law Resourcesncsc.org
- Office of Child Support Services — Interstate Case Processingacf.gov
Right Way Review is a publication, not a law firm. This article states general rules and cites its sources; it is not advice about any particular case, and the law differs by state and changes over time.
More in Custody & Support Across States
Registering a Custody Order in a Second State
An existing custody determination can be registered in another state by filing a letter of request, two copies of the order including one certified, a sworn statement that it has not been modified, and the parties' addresses. The receiving court files it and serves notice on the other party, who has a short period to contest on narrow grounds. Registration confirms enforceability; it does not confer any power to modify the order.
When Two States Both Claim Authority
Interstate custody law requires a court to check, before hearing a case, whether a proceeding concerning the same child is already pending elsewhere. Where one is, the court must stay its own proceeding and communicate with the other court, and it may not exercise jurisdiction if the other proceeding was commenced in a state with jurisdiction under the framework. Parties are required to disclose prior and pending proceedings in their first pleading, on pain of the court declining to act.
Modifying Support After Both Parents Move
A state other than the issuing state may modify a child support order only where two conditions are met. Nobody — neither parent nor the child — may still reside in the issuing state, and the party seeking modification must be a non-resident of the state being asked to act, with the respondent subject to that state's personal jurisdiction. The effect is that a parent seeking a change files where the other parent lives.


