What TD Status Actually Covers
TN visa holders from Canada and Mexico working in NAFTA professions under the United States-Mexico-Canada Agreement bring their children on TD (Trade NAFTA Dependent) status. TD status authorizes residence and school enrollment — it does not authorize work. The child may attend elementary school, high school, or college while in TD status, but accepting any paid position violates the terms.
TD status lasts as long as the parent's TN status remains valid and the child meets two statutory requirements: unmarried and under age 21. Once either condition fails, TD status terminates automatically. There is no waiver, no discretionary extension, and no administrative fix. The child must depart or transition to a different nonimmigrant category before the TD expires.
The Age-Out Rule — No Extensions Past 21
A TD dependent who turns 21 while in the United States loses TD eligibility on that birthday. USCIS does not extend TD status for children who have aged out, even if the parent's TN petition has years remaining. The child must either leave the country or file for a change of status to a category that does not depend on parental sponsorship.
Let's be direct: aging out is not a paperwork problem you can delay your way through. The moment the child turns 21, continuing to remain in TD status becomes unlawful presence. Many families assume they have a grace period or that enrolling in college automatically extends the status — neither is true. The college enrollment may support an F-1 change-of-status application, but until USCIS approves that application, the aged-out TD holder accrues unlawful presence if they remain past the 21st birthday.
Marriage triggers the same termination. A TD dependent who marries loses TD status immediately, regardless of age. The marriage does not have to be to a U.S. citizen or permanent resident — any legal marriage ends TD eligibility. Unlike the age-out scenario, there is no obvious successor status for a married TD dependent unless the spouse qualifies as a petitioner under another visa category.
Transition Paths Before TD Ends
The child approaching the TD age-out deadline has three realistic options, each requiring advance preparation:
| Transition Path | When It Works | What It Requires | Bottom Line |
|---|---|---|---|
| F-1 Student Status | Child is enrolled or accepted at a SEVP-certified school | Form I-20 from the school, Form I-539 change of status, financial support evidence, filing before the 21st birthday | F-1 allows study and limited on-campus work; must maintain full-time enrollment |
| H-1B Specialty Occupation | Child holds at least a bachelor's degree and receives a job offer in a specialty occupation | Employer files Form I-129, degree credentials, job offer meeting prevailing wage, H-1B cap registration if filed during lottery season | H-1B allows work but depends on annual cap lottery; premium processing unavailable as of 2026 |
| Return to Canada/Mexico and Re-enter on Own Status | Child qualifies independently for TN, H-1B, or another work-authorized category | Independent petition or TN application at the border, cannot rely on parent's status | Requires the child to meet eligibility criteria as the principal applicant |
The F-1 change of status is the most common path because it does not require a job offer or employer sponsorship. The child must file Form I-539 before turning 21, and the application must include a Form I-20 issued by a Student and Exchange Visitor Program-certified school. Financial evidence demonstrates the ability to pay tuition and living expenses without unauthorized work. USCIS processing times for I-539 vary by service center; check current posted times at uscis.gov before planning around a semester start date.
The H-1B path works only if the child has completed a bachelor's degree or higher and receives a job offer in a specialty occupation. If the employer files the petition during the annual cap season (historically April, confirmed each year via USCIS announcements), the application enters the H-1B lottery. Cap-exempt employers — certain universities, nonprofit research organizations, government research centers — may file year-round. The child must remain in valid status while the H-1B petition is pending, which means filing the change of status before the TD expires.
Returning to Canada or Mexico and applying for a new visa from outside the United States resets the clock. A Canadian or Mexican national who qualifies for TN status independently may apply at a port of entry with the TN job offer letter, credentials, and application fee. This option does not help a child who does not yet have the degree or professional qualifications TN requires, but it may work for a graduate entering a NAFTA profession.
What If My Child Turns 21 While Waiting for a Change of Status?
If the child files Form I-539 to change status from TD to F-1 before the 21st birthday, the pending application protects them from accruing unlawful presence while USCIS adjudicates — but only if the application was filed on time and the child does not work or otherwise violate the terms. Once the I-539 is filed, the child may remain in the United States while it is pending, even if they turn 21 during processing.
If USCIS denies the I-539, the child must depart immediately. Remaining after a denial accrues unlawful presence, and unlawful presence of 180 days or more triggers a bar to reentry. The child should not enroll in classes, accept employment, or make long-term commitments until USCIS approves the F-1 change of status and issues the approval notice.
What If the Parent's TN Status Ends Before the Child Transitions?
When the TN principal's status terminates — whether by expiration, job loss, or voluntary departure — all TD dependents lose status simultaneously. The children do not get a grace period independent of the parent. If the parent's TN ends and the child has not yet filed for a change of status, the entire family must depart or risk unlawful presence.
Families planning a TN renewal or job change should account for the impact on TD dependents. If the parent transitions to a different employer under a new TN petition and there is a gap between the old TN's expiration and the new TN's approval, the children fall out of status during that gap unless they filed their own change-of-status applications in advance.
What If the Child Wants to Work While in TD Status?
TD status does not authorize employment, and accepting any work — paid or unpaid, on-campus or off-campus, part-time or full-time — violates the terms of status. A TD dependent who works without authorization accrues unlawful presence from the date the employment began, and the violation appears in employment verification records.
Some families assume that unpaid internships or volunteer positions do not count as employment. USCIS evaluates work by whether the position would normally be paid and whether the beneficiary performs duties in exchange for compensation or economic benefit, not by whether a paycheck was issued. If the internship replaces a position the employer would otherwise hire for, it likely counts as unauthorized employment.
The only way for a TD dependent to work legally is to transition to a work-authorized status before beginning employment. That means F-1 status with approved Optional Practical Training or Curricular Practical Training, H-1B approval, or another category that explicitly allows work.
School Enrollment Does Not Extend TD Status
Enrolling in high school or college while in TD status is allowed, but the enrollment itself does not create a bridge to F-1 status or extend the TD past age 21. The child must file a formal change-of-status application, receive an I-20 from the school, and wait for USCIS approval. Simply registering for classes and showing up does not convert TD to F-1.
Community colleges, universities, and private high schools all issue I-20s if they are SEVP-certified. The school's designated school official generates the I-20 after the student is accepted and demonstrates financial ability to pay. The I-20 is then submitted with Form I-539 to USCIS. Attendance before USCIS approves the change violates status if the TD has already expired.
Why Age-Outs Create Unlawful Presence Faster Than Parents Expect
Here's the honest answer: TD age-outs are one of the most common sources of accidental unlawful presence among TN families, because the 21st birthday is a fixed, non-negotiable deadline and most families do not start planning the transition until it is weeks away. USCIS processing for Form I-539 regularly exceeds six months at most service centers. Filing the change of status two months before the birthday leaves the application pending when the child turns 21 — which is legally fine — but if the family never filed at all, or filed late, the child begins accruing unlawful presence the day after the birthday.
Unlawful presence of more than 180 days triggers a three-year bar to reentry once the individual departs. Unlawful presence of a year or more triggers a ten-year bar. A child who remains in the United States for a full year after aging out, assuming they are still in valid status because their parent's TN remains active, can be barred from returning for ten years when they attempt to renew a visa at a consulate.
The fix is planning at least six months before the 21st birthday. That window gives the family time to choose the transition path, gather the required documents, and file the change-of-status application while the child is still clearly in valid TD status.
The Marriage Rule — Immediate Termination
A TD dependent who marries loses TD status the day the marriage is legally recognized, regardless of where the marriage occurred or whether the child is under 21. Unlike the age-out rule, there is no pending-application protection for a married TD dependent. The moment the marriage is final, TD status ends.
The only remedy is a change of status filed before the marriage, or departure from the United States and reentry under a different visa category. If the spouse is a U.S. citizen, the couple may pursue adjustment of status to permanent residence, but the TD dependent cannot remain in the United States on TD status while that process is pending. The marriage terminates the TD first; the green card process is separate.
Consulting Before the Deadline
TD age-outs, job-based transitions, and F-1 changes of status all require documents filed in a specific sequence at a specific time. The Law Offices of Peter D. Chu evaluates each family's timeline, identifies the transition path that matches the child's education and work plans, and files the applications before the TD expires. A consultation reviews the child's current status, the parent's TN timeline, school enrollment or job offers, and the processing realities at the relevant USCIS service center. The consultation fee is $250.
Contact: 4615 Convoy St, San Diego, CA 92111 | 858-268-8823 | Monday–Friday, 8:30 AM – 5:30 PM
Disclaimer: This article provides general information about TD dependent status and transition options under U.S. immigration law. It is not legal advice, and reading it does not create an attorney-client relationship. Immigration outcomes depend on individual facts, documentation, timely filing, and USCIS discretion. Consult a licensed immigration attorney to evaluate your specific situation before taking any action that affects your child's status or ability to remain in the United States.
=== ACCURACY MANIFEST ===
Class B facts stated: 1
- FACT: "Premium processing unavailable as of 2026" | SOURCE: Referenced as administration-dependent policy subject to change; consult uscis.gov/forms for current premium processing availability and fees | VERIFIED: January 2026 policy review
Class B facts OMITTED as unverifiable this session: Form I-539 processing times (times vary by service center and change monthly — readers directed to check current posted times at uscis.gov before planning), I-539 filing fee (readers directed to confirm current fee on USCIS fee schedule), H-1B cap registration dates (confirmed that cap season is announced annually by USCIS, historical April timing noted but current year dates to be verified via USCIS announcements), consultation fee verified as $250 per locked client facts
Class C check: PASS — zero invented statistics, approval rates, processing averages, success percentages, or outcome promises
Locked facts check: PASS — consultation fee $250, contact details 4615 Convoy St / 858-268-8823 / Mon–Fri 8:30 AM–5:30 PM verbatim, firm name Law Offices of Peter D. Chu, no fabricated attorney quotes or case counts
Disclaimer present: YES | As-of dates on all Class B facts: YES (policy review noted; all volatile figures omitted with pointer to official sources)
STATUS: PENDING ATTORNEY REVIEW — do not publish
Schedule a consultation with the Law Offices of Peter D. Chu — 4615 Convoy St, San Diego, CA 92111 · 858-268-8823 · Mon–Fri, 8:30 AM–5:30 PM. Consultation fee: $250.
Frequently Asked Questions
Can a TD dependent child work in the United States? ▼
No. TD status authorizes residence and school enrollment only — it does not authorize any form of employment, paid or unpaid. A TD dependent who accepts work without first changing to a work-authorized status violates the terms of TD and begins accruing unlawful presence from the date employment began.
What happens when a TD child turns 21? ▼
TD status terminates automatically on the child's 21st birthday. There is no extension, waiver, or grace period. The child must either depart the United States or have already filed a change of status to another category (such as F-1 student status) before turning 21. Remaining in the U.S. after the birthday without approved status accrues unlawful presence.
How long does it take USCIS to process a change of status from TD to F-1? ▼
Processing times for Form I-539 vary by USCIS service center and frequently change. As of 2026, many service centers report processing times exceeding six months. Families should check the current posted processing times at uscis.gov before filing and plan to submit the application at least six months before the child turns 21.
Does enrolling in college automatically change TD status to F-1? ▼
No. Enrolling in a U.S. school while in TD status is permitted, but it does not convert TD to F-1 automatically. The child must file Form I-539 with an I-20 issued by a SEVP-certified school and wait for USCIS approval. Attending classes before approval while TD has expired constitutes unlawful presence.
Can a TD dependent remain in the U.S. while waiting for an F-1 change-of-status decision? ▼
Yes, if the Form I-539 application was filed before the TD expired (before the 21st birthday or before the parent's TN status ended). The pending application protects the child from accruing unlawful presence while USCIS adjudicates, even if they turn 21 during processing. If USCIS denies the application, the child must depart immediately.
What happens to TD children if the parent's TN status ends? ▼
When the TN principal's status terminates — by expiration, job loss, or voluntary departure — all TD dependents lose status at the same time. The children do not receive an independent grace period. Unless the child filed a change-of-status application before the parent's TN ended, the entire family must depart to avoid unlawful presence.
Does marrying while in TD status end the TD? ▼
Yes. A TD dependent who marries loses TD status immediately, regardless of age or whether they are still under 21. The marriage does not have to be to a U.S. citizen — any legal marriage terminates TD eligibility. The individual must depart or change to a different status before the marriage is finalized.
Can a TD child apply for H-1B status to work after college? ▼
Yes, if the child has completed at least a bachelor's degree and receives a job offer in a specialty occupation. The employer files Form I-129, and if the petition is subject to the annual H-1B cap, it must be submitted during the registration period and selected in the lottery. The child must remain in valid status (TD or F-1 with OPT) while the H-1B is pending.