Read the general life across the border overview
Hypothetical example: a Qualicum Beach household planning a move includes a twenty-three-year-old daughter finishing a degree and a widowed parent who has lived with the family for four years. Both are, in every practical sense, part of the household. Neither is a derivative on any of the routes discussed here. Families discover this late because the categories use the word family and mean something narrower, and the people who fall outside need their own routes with their own requirements and timelines. The concrete decision is whether every person expected to move fits the derivative definition or needs a separate route. List names, ages, marital status, and intended work or study before choosing the principal’s category.
What derivative status actually covers
Across the temporary work classifications and the immigrant investor category, derivative status extends to a spouse and to unmarried children under twenty-one. It does not extend to adult children, to parents, to siblings, or to other relatives however dependent they are in fact. The rule is a status rule rather than a test of dependency, so evidence that a parent relies on the family entirely does not bring them inside it. This is one of the few points on which planning cannot find a way through the wording, and it is better confronted at the start of a plan than at the end. Ask for civil records early, especially where a stepchild, adoption, past marriage, or name change is involved. The legal relationship is settled by documents, and obtaining replacements can take longer than the principal’s work process.
Each excluded person needs their own basis
The practical response is to assess each of them independently. An adult child finishing a degree may have a route as a student, which requires an institution to issue documents and has its own requirements and costs, or may qualify in their own right through employment if their occupation and citizenship allow. A parent's options are narrower and depend on family immigration provisions with their own eligibility rules and waiting periods, which should be assessed by a licensed U.S. immigration attorney rather than assumed. Visiting is not living, and a plan built on repeated visits should be described honestly as what it is. Hypothetical example: Sonia, a Canadian occupational therapist, plans to relocate with her spouse, a seventeen-year-old stepdaughter, and her adult brother. She should verify the marriage and stepchild records, then make a separate plan for the brother rather than including him in a household budget as though he were a derivative. The decision is whether the family can stagger the move or needs another lawful option.
Raise it in the first conversation, not the last
The reason to bring this up early is that the excluded people usually have the longest timelines. A student route depends on admission cycles. Family immigration provisions can involve waiting periods measured in years. A household that learns this at the outset can plan around it: staggering the move, keeping a Canadian base, or choosing a route for the principal that leaves other options open. A household that learns it three weeks before departure is choosing between leaving someone behind and abandoning the plan, which is not a choice anyone should make under that kind of pressure. Revisit the list before extensions, renewals, and major birthdays. A child close to twenty-one may need an independent strategy much earlier than the family expects, and the absence of a plan can turn a manageable transition into an emergency.
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: 2026-09-07. General preparation guidance, not an individual assessment.