What Happens If You Move to the U.S. Without Proper Work Authorization?

If you want to live and work in the U.S., play by the book—because in immigration law, the book bites back—don’t underestimate the consequences of moving to the U.S. from Canada without a job, and don’t rely on secondhand stories about “fixing it later.” The rules are very strict, and enforcement is real.

What Is Work Authorization?

Think of proper work authorization as your official permission slip to earn money in the U.S. – a document that says, “This person is allowed to work here, for this employer, in this role, until this date.” No slip? No legal work.

• It starts: when your visa or work permit is approved and you’ve entered the U.S. in that status.
• It ends: when your visa/work authorization expires, you leave the job, or change your status.

If you’re considering a move, consult a reputable immigration attorney early. Get your paperwork lined up before you cross that borde—the smartest, safest move you can make—both for your career and your peace of mind.

The Realities of Working in the U.S. Without Proper Authorization

Let’s cut to the chase: in the United States, working without the right work authorization is a major legal risk, even if you’re coming from Canada (or anywhere else). The U.S. immigration system is strict, and—especially in recent years—has only gotten more vigilant. Think of the system less as a gray area and more like a chessboard: one wrong move, and the consequences can follow you for years.

Key Points To Remember

1. Every foreign national needs proper work authorization to legally work in the U.S.—period. This typically means a work visa (like H-1B, L-1, or TN for Canadians/Mexicans under NAFTA/USMCA), an Employment Authorization Document (EAD), or green card status.
2. Canadian citizens enjoy some streamlined processes (like the TN visa), but they are NOT exempt from the requirement to have employment authorization before starting work—there’s no loophole for just “showing up and fixing it later.”
3. It is NOT legal to move to the U.S. and begin work without the right documents, even if you plan to “adjust status” later. The U.S. government takes unauthorized employment seriously, and “fixing it later” is much harder (and riskier) than people think.

Consequences of Unauthorized Work

• Future immigration benefits could be denied. Unauthorized employment can make you ineligible for future visas, green cards, or even U.S. citizenship.
• You could be deported or barred from re-entering the U.S. for years.
• Employers can face heavy fines and penalties for hiring someone without valid work authorization.
• Visa overstays and unauthorized work are tracked closely by U.S. authorities—there’s much less “looking the other way” than some might assume.

Can You “Fix” Your Status Later?

In most cases, it’s very difficult (and sometimes impossible) to clean up a messy status after the fact. 

Unauthorized work can make you ineligible for adjustment of status (for example, switching from a visitor visa to a work visa or green card). Waivers are sometimes available, but they are rare and require extraordinary circumstances.

Most Common Myths About U.S. Job Visas (and a Bit of Truth)

Sometimes people slip through the cracks temporarily—maybe they’re working “under the table,” or an employer is willing to take a risk. But these stories are the exception, not the rule, and the risks are enormous. Immigration authorities can audit records for years after the fact. It’s like ignoring a leaky roof because it hasn’t collapsed yet; eventually, it catches up.

#1. “I can work remotely for a foreign employer while in the U.S.”

Nope! Even if you’re working for a company outside the U.S., if you’re physically on U.S. soil, you generally need work authorization. The U.S. government cares where you are, not just who pays you. (Think of it as: “When in Rome, follow Roman paperwork.”)

#2. “I can start working as soon as I apply for a visa.”

It looks more like wishful thinking. You can only start working after your work visa or employment authorization is officially approved and active—not a moment before. Applying isn’t enough—you need that golden ticket in hand.

#3. “A business can pay me as an independent contractor.”

Not even close! The rules don’t care if you’re called an “employee,” “contractor,” “consultant,” or “wizard.” If you’re providing services and getting paid by a U.S. entity, you need the proper work authorization. No clever titles or 1099 forms make it legal.

#4. “Nobody checks if I work informally.”

Immigration authorities are a lot more thorough than people think. Tax records, social security numbers, even LinkedIn profiles have tripped people up. Sometimes, it catches up with you years later—especially if you ever want a green card or citizenship.

#5. “I’m Canadian, so I don’t need a visa to work in the U.S.”

Canadians are lucky in some ways (hello, TN visa!), but you still need a visa or work authorization before you start earning that paycheck. You can’t just stroll across the border and clock in—there’s paperwork, even if it’s a bit smoother for you than for others.

If you’re earning money while physically in the U.S.—for anyone, anywhere—you need the right authorization. If you’re Canadian, the process is friendlier, but the rules are still real. When in doubt, check first with your lawyer, not after.

For Canadians: Where Are the Lines?

For most jobs, you’ll need a TN visa (thanks to the USMCA/NAFTA agreement). It’s fast, but you still need a job offer and to prove you qualify for a TN-eligible profession. And, no way you start work until you’re officially stamped in as a TN worker at a port of entry (border or airport). Be careful, no “working while waiting”—you need the paperwork first, even if you’re just working remotely for a U.S. company.

How to Correct or Avoid Unauthorized Status And When You Should Definitely Seek Legal Help

Let’s tackle some of the most common (and a few trickier) situations where “changing status” comes up, what you can do, what you can’t, and when you really need to call in an expert.

You Entered on a Visitor Visa (B1/B2) & Got a Job Offer

You cannot legally work or even volunteer for a paid position while on a B1/B2.

You CANNOT just start work or “change your mind” and stay. What should you do in this case?

Option 1: Leave the U.S., apply for the correct work visa from your home country, and re-enter once it’s approved.

Option 2: In some cases, you can apply to “change status” while still in the U.S., but it’s slow, tricky, and risky. If you start work before approval, it’s a big problem.

Pro Tip: U.S. immigration gets suspicious if you enter as a tourist but quickly try to change status to work—they’re watching for “preconceived intent.” When in doubt, always consult an immigration attorney.

You Overstayed Your Visa

Even a short overstay can have major consequences. A few days? May be forgiven at the border, but still risky.

180+ days? You could be barred from returning to the U.S. for 3–10 years. What to do?

• Don’t panic, but don’t ignore it. Talk to a reputable immigration lawyer ASAP.
• “Fixing it” is hard—most people need to leave the U.S. and apply for a new visa from abroad.
• There are some waivers, but they’re for rare hardship situations.

My Employer Made a Mistake / Didn’t File Properly

You are responsible for your own status—even if your employer slips up.

• If you discover a paperwork error before your status expires, fix it fast!
• If it’s after your work authorization expires, stop working right away and seek legal help.
• Don’t rely on “my boss said it’s fine.” Always double-check your own documents and approval notices.

Other Scenarios

• Falling in Love & Getting Married in the U.S.

If you marry a U.S. citizen while on a valid visa, you may be able to adjust status—but only if the marriage is real and not just for the paperwork. Timing and intent matter a lot here and you can’t trick it!

• Changing Employers

On most visas (like H-1B or TN), if you switch jobs, the new employer must file paperwork before you start the new job. Don’t just assume you can move from one to another without new approval—it’s one of the big ‘no-no.’

• Student Visa (F-1) to Work Visa

Many students want to stay and work after graduation. You’ll need to apply for Optional Practical Training (OPT), or a work visa (like H-1B)—and you must do so before your student status expires.

The Bottom Line

1. Never start work without the right authorization.
2. Changing status in the U.S. is possible, but complicated and slow. It often makes more sense (and is safer) to leave the U.S. and re-enter with the correct visa.
3. Immigration law is full of fine print and hidden traps. When in doubt, don’t guess—ask a pro. Even a quick consultation with a real immigration lawyer can save you years of headaches.

Keep your own records—never rely purely on employers or friends for legal advice. Your future self will thank you!