H-1B Transfer Before Approval: AC21 Portability (2026)
Under AC21 portability, you can start working for a new employer when the H-1B transfer petition is filed — you do not have to wait for USCIS approval. But conditions apply.
AC21 H-1B Portability: The Core Rule
Under INA section 214(n) (the 'H-1B portability' provision), a beneficiary who is the subject of an H-1B petition can begin working for a new employer upon filing of the transfer petition, provided: (1) the original H-1B petition was approvable (not fraudulent), (2) the beneficiary is in H-1B status or was in H-1B status within the past 60 days (grace period), and (3) the new petition is nonfrivolous (has a reasonable basis). If these conditions are met, you can legally start work on the day the new employer's I-129 is received by USCIS.
What 'Nonfrivolous' Means
A nonfrivolous petition has a reasonable factual and legal basis — the employer is legitimate, the position genuinely qualifies as specialty occupation, and the application is made in good faith. A petition filed purely to obtain portability benefits with no real job behind it is frivolous and does not confer portability. In practice, virtually any genuine employment relationship with a legitimately prepared petition is nonfrivolous.
The 60-Day Grace Period
If your H-1B was terminated (layoff, resignation), you have 60 days during which you are in an authorized grace period — you can use this period to find a new employer and file a transfer petition. The transfer petition filed within the 60-day grace period still triggers portability. Do not let the 60 days expire before the new petition is filed.
Protecting Yourself: Documents to Keep
During a pending transfer, keep: (1) USCIS receipt notice (I-797C) from new employer's I-129 filing, (2) Prior employer's H-1B approval notice (I-797B), (3) Offer letter from new employer, (4) Proof of I-94 status. If USCIS requests evidence or denies the transfer, you will need to demonstrate you were in valid status when the petition was filed. Do not destroy or discard prior I-797 approvals.
Frequently Asked Questions
Can I quit my current H-1B job before the transfer is approved?
Yes, using AC21 portability. File the transfer petition with the new employer, then you can start work on receipt (filing date). Give appropriate notice to your current employer. Your current H-1B petition does not need to be withdrawn — portability attaches to the filing, not approval.
What if the H-1B transfer is denied after I already started working?
If the transfer petition is denied, you lose portability and must stop working for the new employer immediately. You may have a 60-day grace period to find another sponsor and file again, depending on the denial reason. Always use premium processing for transfers to minimize exposure time.
Does the new job need to be in the same occupation for portability?
The portability provision does not require the same or similar occupation for straightforward H-1B transfers (distinct from AC21 green card portability under Section 204(j)). For H-1B visa portability under INA 214(n), the new petition just needs to meet the H-1B specialty occupation standard — not necessarily the same SOC code as the previous H-1B.
Can I start a new job on the same day my old employer's petition is withdrawn?
Yes, if the new employer has filed the transfer petition before the old petition is withdrawn. Portability attaches when the new petition is filed — withdrawal of the old petition does not retroactively eliminate portability. However, you cannot start before the new petition is filed.