H-1B Portability for Employers: When Can a New Hire Actually Start Work?

TLDR:

• H-1B “portability” lets a new hire begin working for your company as soon as you file a nonfrivolous Change of Employer (COE) petition, you don’t have to wait for USCIS approval.
• Filing alone doesn’t guarantee a start date. Employers should confirm the petition has been received (via a receipt notice, or delivery + payment confirmation for premium processing) before finalizing onboarding.
• I-9 documentation, the 60-day grace period, and same-employer extensions each carry their own rules. Get these wrong and you risk a compliance headache down the road.
• If your HR or talent acquisition team is managing H-1B transfers, this is worth reviewing with immigration counsel before you set a start date.

What is H-1B Portability? 

As a general rule, a nonimmigrant employee changing employers must wait for the USCIS approval notice before beginning work for the new employer. In the H-1B context, this generally means the employer must first obtain a certified Form ETA 9035, Labor Condition Application for Nonimmigrant Workers (“LCA”) from the Department of Labor, then file Form I-129, Petition for a Nonimmigrant Worker (“Form I-129”), with USCIS to request H-1B classification or a change of H-1B employer. However, USCIS recognizes limited exceptions to this general “approval-before-work” rule, including H ‑1B portability. 

For H-1B Change of Employer (COE) petitions, portability generally permits an H-1B worker to begin employment with the new H-1B employer as soon as the new employer files a nonfrivolous H-1B COE petition on the employee’s behalf, provided the filing occurs before the employee’s authorized stay expires and the employee otherwise meets the portability requirements. 

If Utilizing Portability, When May the Employee Start Work? 

Under portability regulations, an H-1B employee may begin working once the H-1B COE petition is filed. However, filing alone does not guarantee that USCIS will accept and “receipt in” the petition. For start-date planning, including when the foreign national may want to give two weeks’ notice to a current employer, best practice is the following sequence of events: 

1. Wait for the formal Form I-797C receipt notice when available; or alternatively, 
2. For premium processing cases, wait until both FedEx delivery confirmation and the premium processing e-confirmation are received. The e-confirmation is useful for timing and planning because USCIS typically processes payment shortly after it is issued. Once the e-confirmation is received, BIL will monitor for payment processing. For the employee’s Form I-9 records, retain:
   a. Proof of delivery confirmation (e.g., FedEx confirmation),
   b. Proof of payment for filing the new Form I-129, and
   c. A copy of the filed Form I-129. 

I-9 Verification Documentation 

For an H-1B COE petition where USCIS has not yet issued an approval notice, the employer should complete a new Form I-9 consistent with USCIS I-9 Central guidance for H-1B portability. In Section 2, the employer should use the employee’s foreign passport and unexpired Form I-94 as List A documentation, write “AC-21” in the Additional Information field, enter the date the Form I-129 was submitted to USCIS, and retain the filing evidence noted above. 

The filing evidence referenced above should be retained with the employee’s Form I-9 records while the approval notice is pending. 

60-Day Grace Period Considerations 

If the employee has already stopped working for the prior H-1B employer, portability may still be available if the new H-1B COE petition is filed during the applicable discretionary grace period, generally up to 60 consecutive days or until the end of the employee’s authorized validity period, whichever is shorter. 

Because the 60-day grace period is discretionary and fact-specific, the employee’s status history, last day of employment, Form I-94 validity, and timing of filing should be reviewed with immigration counsel before confirming a start date. 

Practical Reminders:

• Portability applies to H-1B change of employer filings. Same-employer H-1B extensions are handled separately under the 240-day continuing employment rule. 

• Review worksite, job duties, wage, and employment structure before filing. Material changes may require an amended petition. 

• Maintain H-1B Public Access File records separately from the I-9 file. 

• Confirm case-specific facts, including timing, status history, travel, and prior employment, with immigration counsel before confirming a start date. 

• If USCIS rejects or denies the petition, contact immigration counsel immediately before allowing work to continue. 

Getting H-1B Portability Right, From Filing to First Day

H-1B portability is genuinely useful, it lets employers move quickly on strong candidates without losing them to a lengthy approval wait. But “the employee can start once we file” is a simplification that skips over several details that actually determine whether a start date is safe: confirmation of filing, correct I-9 documentation, grace-period math, and awareness of what counts as a material change.

None of this needs to slow down your hiring. It just needs to be handled correctly the first time. Berardi Immigration Law works with employers to build H-1B transfer processes from filing strategy through I-9 documentation that hold up to scrutiny long after the new hire’s first day. Nobody should navigate immigration alone, including the HR and talent teams responsible for getting it right. Book your consultation with our business immigration team today and start your U.S. immigration process with confidence.

FAQs

Q: Can an H-1B employee start working for us the same day we file their COE petition?

Not quite. Portability allows work to begin once the petition is filed and USCIS has receipted it, but confirming that receipt (through a Form I-797C, or delivery and payment confirmation for premium processing) before finalizing a start date is the safer approach for both the employer and employee.

Q: What happens if we let the employee start working and USCIS later denies the petition?

Work authorization under portability depends on the petition remaining pending or being approved. If USCIS rejects or denies the case, the employee’s authorization to continue working ends, and employers should contact immigration counsel immediately to determine next steps rather than allowing work to continue.

Q: Does the 60-day grace period mean an employee can wait two months before their new employer files?

Not necessarily. The 60-day grace period (or the remainder of the employee’s authorized validity period, whichever is shorter) is discretionary, not guaranteed, and depends on the employee’s specific status history and timing. This scenario should be reviewed with immigration counsel before a start date is confirmed.