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Derivative status for children rests on two facts that can each expire: being unmarried, and being under twenty-one. In the temporary categories the birthday simply ends eligibility. In the immigrant categories a statutory calculation can preserve a younger age in defined circumstances. Confusing the two produces family plans that assume a protection which, in the temporary categories, does not exist at all.
Temporary dependants: the birthday is the deadline
TD, L-2 and E-2 dependent status is available to a spouse and to unmarried children under twenty-one. No grace concept attaches to the age itself: the day a child turns twenty-one the derivative basis is gone, whatever validity remains on the parent’s own status. Marrying before that date ends it just as effectively. Nothing the family does adds time — enrolment in school is permitted while status is maintained but neither extends it nor holds the age, and an extension pending for the parent does not carry an aged-out child along with it. Planning therefore has to happen ahead of the date rather than around it. A student classification in the child’s own right is the usual continuation, requiring acceptance by an approved school and its own filing, which takes long enough that starting after the birthday means a gap in status. None of these dependent categories permits the child to work, at any age, whatever the parent’s classification allows. Spouses are not treated alike either: a TD spouse may take no employment at all, including services performed remotely from a U.S. address for a Canadian employer, whereas an L-2 or E-2 spouse is employment-authorised incident to valid status and needs no separate card.
Immigrant cases: an age that is calculated, not observed
Derivative children in the employment-based immigrant categories, investor cases included, are protected by a statutory formula rather than by the calendar alone. The child’s age for eligibility is worked out by subtracting the period a petition was pending from the age at the moment an immigrant visa becomes available, and the result holds only where the child seeks to acquire permanent residence within a year of that availability. Two consequences follow. The calculation depends on real dates — petition receipt, approval, and the movement of the relevant category — so it cannot be estimated from a project timetable or promised in advance by anyone. And the one-year action requirement is a live obligation: a family that waits after availability arrives can forfeit protection it had already earned. Paying more money has no effect on the arithmetic. Accompanying derivatives in an investor case need no separate qualifying investment of their own in order to join the principal.
Deciding the order in which a family moves
Hypothetical example: a McBride family whose principal is filing an investor petition has children aged nineteen and seventeen. The younger is unlikely to be at risk. The elder one’s outcome turns on when the petition is filed and when a visa becomes available, so the filing date is a family decision rather than a purely financial one, and postponing a quarter for convenience carries a real cost. Had the same family moved first on a temporary status, both children would hold derivative status only until each turned twenty-one and would then need an independent basis. Two points hold across every scenario. For immigrant entry the principal must be admitted before or together with the derivative relatives, never afterwards. And under the Gold Card framework each eligible joining spouse or unmarried child under twenty-one carries its own US$15,000 non-refundable processing fee and its own US$1 million gift, which is why official guidance is to include family members from the outset rather than adding them later.
What else is on your mind?
Is a matching job title enough for TN?Can years of experience replace a degree for TN?Can my own U.S. company employ me under TN?Can my spouse work if I hold TN status?Editorial source review: 2026-09-08. General preparation guidance, not an individual assessment.
- Department of State — USMCA professionals
- USCIS — L-1A executives and managers
- Department of State — Treaty investors
- USCIS — EB-5 program
- INA 203 — Immigrant investor requirements
- Official Gold Card program
- Executive Order 14351
- USCIS — employment authorization for certain spouses
- Department of State — after the immigrant visa interview