IN THIS GUIDE · A household deciding whether an unmarried partner can accompany a TN professional, given the spouse and child limits of TD status
Start with the TN eligibility and application overview
Understand what TD actually covers
TD is defined by relationship and age: a spouse, and unmarried children under 21. The procedural steps differ by each family member's nationality, since Canadian citizens and Mexican citizens follow different routes, and a family member who holds neither citizenship should have their own steps confirmed with counsel. TD also carries a scope limit that matters for planning, because it contemplates study but does not authorize employment in the United States. A household budgeting on two incomes should test that assumption before anything else. Decide early whether the facts fit a request made at inspection or preclearance, or an employer-filed I-129 petition. The latter route calls for a petition decision before travel, while the first requires a complete package on the day classification is requested.
Do not assume common-law status transfers
Provincial rules that treat cohabiting partners as spouses for taxes, benefits, or family law do not determine who counts as a spouse for this classification. Offering a cohabitation agreement, a shared lease, or years of joint accounts in place of a marriage record tends to raise questions rather than answer them. Where the legal character of the relationship is genuinely unclear, that is a question for counsel before anything is filed or presented. The record that settles the relationship is ordinarily a civil marriage certificate, with a certified translation where needed; declarations of commitment do not replace it. If a marriage is planned, choose whether the immigration timeline waits for the legal ceremony or the partner pursues a separate status.
Look at the partner's own routes separately
A partner who cannot hold TD is not necessarily unable to come; they simply need a basis of their own. That might be an employment-based category in their own right, a study route, or visitor entry with its own limits on activity and duration. Each carries different permissions, and visitor status in particular does not authorize work. Counsel can compare realistic options against the partner's citizenship, qualifications, and plans. A proposed job should be tested independently for eligibility, timing and work authorization. TN does not permit a professional to operate as their own U.S. employer, so ownership must be disclosed before a role is described as employment.
Plan the household around two independent cases
Treat the partner's route as a separate file with its own evidence, timeline, and outcome rather than an attachment to the principal's. That means separate document gathering, separate advice, and a household plan that still works if one case moves faster than the other. Decisions that are hard to reverse, such as ending a lease, resigning, or enrolling children, deserve to wait until both paths have realistic dates. A first review should end with an owner for each missing record and a decision date for the household. It should also identify what changes if the principal’s start date moves, because TD eligibility follows the principal’s valid TN classification rather than a planned relocation date.
Sources reviewed 2026-09-07. This guide covers a preparation focus; it is not an individual eligibility assessment.