Can I start working for a new employer the day my transfer is filed?

Only if you have been in valid H-1B status for 180 or more continuous days. If you have not yet hit 180 days, you must wait for USCIS to approve the transfer before starting work. Using portability before 180 days is an immigration violation. Count your days from your I-797 status start date, not your hire date.

What happens to my old H-1B if I transfer?

When you file an H-1B transfer with a new employer, your old H-1B remains valid until the transfer is adjudicated or until you stop working for your old employer, whichever comes first. Once you start at the new employer under portability, you are withdrawing from the old employer's petition. The old employer should formally withdraw their petition.

Does the 180-day rule reset if I change employers?

No. The 180 days counts from your original H-1B status start date, not from each employer's hire date. If you entered H-1B status October 1, you hit 180 days around April. A subsequent employer change after that date uses the same original 180-day threshold. The counter does not restart with each new employer.

What if USCIS denies my transfer petition?

If USCIS denies the transfer, your work authorization at the new employer terminates on the denial date. You must stop working immediately. If the denial was in error, file a motion to reconsider. This is why careful due diligence on petition quality before starting, and not burning bridges with the old employer, matters during the portability period.

Can I invoke portability to change to a self-employed or owner role?

Portability requires a bona fide employer-employee relationship. If you are the sole owner of the new entity with no legitimate control mechanism such as a board of directors or investors with termination authority, USCIS may challenge whether a true employer-employee relationship exists. Get immigration counsel before attempting portability to a startup you own.

Does portability work for H-4 EAD holders?

H-4 EAD authorization is tied to the principal H-1B holder's status, not to their specific employer. When the H-1B holder invokes portability and changes employers, the H-4 EAD remains valid because the underlying H-4 status is still valid. If the H-1B holder's status becomes invalid, the H-4 and H-4 EAD are also affected.

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AC21 Portability

H-1B Portability Under AC21: How to Change Jobs Without Losing Your Status

AC21 portability is one of the most misunderstood protections in immigration law. Here is exactly what it covers, what the 180-day rule means in practice, and how to use it correctly.

By Sumit PatelUpdated May 202613 min read

What AC21 Portability Means

The American Competitiveness in the 21st Century Act (AC21), enacted in 2000, created H-1B portability. It allows H-1B workers to change employers without waiting for USCIS to approve the new petition, as long as specific conditions are met.

You must have been in valid H-1B status for at least 180 days continuously
Your new employer must file an H-1B transfer petition on your behalf
Once the transfer is filed, you can start working for the new employer immediately
USCIS approval of the transfer petition later validates your continuous lawful status

The 180-Day Requirement: What It Actually Means

The 180 days refers to the period you must have been in valid H-1B status, not the length of time with your current employer. It starts from the date your H-1B status was approved, the status start date on your I-797.

Day 1 starts on your H-1B status start date, typically October 1 for cap-subject H-1Bs
Days count continuously, periods of travel outside the U.S. generally do not interrupt the count
If you change employers before 180 days, you must wait for USCIS to approve the transfer before starting
After 180 days, you can start immediately upon filing and do not need to wait for approval

Same or Similar Occupation Requirement

H-1B portability requires the new position to be in the same or similar occupational classification as the original H-1B petition, evaluated under the Standard Occupational Classification (SOC) system.

Same occupation: identical SOC code, clear-cut portability
Similar occupation: overlapping duties, skills, and industry, evaluated case by case
A software engineer moving to machine learning engineering: likely similar occupation
A software engineer moving to a product manager role: potentially different classification, get legal advice
Document the job duties of both positions to support a portability argument if challenged

Green Card Portability Under AC21

AC21 portability extends to pending I-485 applications. If your I-485 has been pending for at least 180 days, you can change employers or change to a similar job without affecting your pending green card application.

The underlying I-140 must have been approved at the time you invoke portability
The new job must be in the same or similar occupational classification as the job on the original I-140
File Form I-485J (Supplement J) to formally invoke portability and connect the new offer to the pending I-485
Your original priority date from the I-140 is preserved, you do not lose your place in line

Frequently Asked Questions

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