Statutory Overview: The standard H-1B six-year limitation under INA § 214(g)(4) has specific statutory exceptions. AC21 § 106(a)/(b) can support one-year extensions based on lengthy labor-certification or immigrant-petition processing, while AC21 § 104(c) can support extensions of up to three years when an approved EB-1, EB-2, or EB-3 immigrant petition cannot yet lead to permanent residence because of the applicable per-country limitation.
How the Two AC21 Rules Differ
- § 106(a)/(b): Based on a qualifying labor certification or immigrant petition filed at least 365 days before the beneficiary will exhaust the six-year H-1B limit. Extensions are generally granted in one-year increments while the underlying permanent-residence process remains eligible under the regulation.
- § 104(c): Requires an approved employment-based immigrant petition and eligibility for the underlying EB-1, EB-2, or EB-3 classification except for the applicable per-country limitation. Extensions may be granted in increments of up to three years while that eligibility continues.
- I-140 withdrawal/revocation: A 180-day rule can protect an approved employment-based petition from automatic revocation based solely on withdrawal, but other statutory or regulatory revocation grounds can still apply.
AC21 Extension Provisions Comparison
| AC21 Provision | Prerequisite Requirement | Extension Increment | CFR Citation |
|---|---|---|---|
| AC21 § 106(a)/(b) | PERM (ETA-9089) or Form I-140 filed 365+ days prior to 6-year H-1B max date. | 1-Year Increments | 8 CFR § 214.2(h)(13)(iii)(D) |
| AC21 § 104(c) | Approved Form I-140 with priority date backlogged under per-country limits. | 3-Year Increments | 8 CFR § 214.2(h)(13)(iii)(E) |
Critical Timeline Guidelines
- The 365-Day Clock: The qualifying labor certification or Form I-140 must have been filed at least 365 days before the date you will exhaust six years of H-1B status. The calculation should account for any qualifying recapture of time spent outside the United States.
- Recapturing Travel Time: You can recapture days spent outside the U.S. to extend your 6-year max date, giving your employer additional time to hit the 365-day PERM benchmark.
- Approved I-140 After Employer Withdrawal: A qualifying approved I-140 can generally remain valid for certain portability and H-1B extension purposes after withdrawal when the statutory 180-day protection applies, unless the petition is revoked on another ground. The 180-day rule is not itself the complete § 104(c) eligibility test.
At-A-Glance
365-Day PERM RuleAC21 § 106(a)
3-Year ExtensionAC21 § 104(c)
Statutory Max6 Years (Without AC21)
Related Tools
Related US Tools & Guides
Frequently Asked Questions (FAQ)
No. The H-1B petitioning employer does not have to be the same employer that filed the approved immigrant petition. The beneficiary must still satisfy the § 104(c) requirements, including eligibility for the approved EB classification but for the applicable per-country limitation.
An employment-based I-140 generally is not automatically revoked solely because the employer withdraws it 180 days or more after approval, or after the associated adjustment application has been pending for 180 days or more. Revocation can still occur for other statutory or regulatory reasons, including fraud or material error.
Under AC21 § 106(a)/(b) (8 CFR § 214.2(h)(13)(iii)(D)), an H-1B worker can extend status beyond 6 years in 1-year increments if a PERM Labor Certification (Form ETA-9089) or Form I-140 petition was filed at least 365 days prior to reaching the 6-year max-out date.
Under AC21 § 104(c) and 8 CFR § 214.2(h)(13)(iii)(E), an H-1B worker may qualify for an extension beyond the six-year limit when the worker is the beneficiary of an approved employment-based immigrant petition under EB-1, EB-2, or EB-3 and is eligible for that immigrant classification but for the applicable per-country limitation. Qualifying extensions may be granted in increments of up to three years for as long as the statutory eligibility continues.
Any days spent physically outside the U.S. during your 6-year H-1B tenure can be recaptured. Recapturing physical absence extends your 6-year max-out date, allowing your PERM filing to reach the required 365-day age before your status expires.
A subsequent H-1B petitioner may rely on a qualifying approved employment-based immigrant petition for a § 104(c) extension when the beneficiary remains eligible under the regulation. The 180-day rule is important because an employment-based I-140 generally is not automatically revoked solely because of employer withdrawal when the withdrawal occurs 180 days or more after approval (or the associated adjustment application has been pending 180 days or more), unless another revocation ground applies. The 180-day period should not be described as a universal standalone requirement for every § 104(c) extension.
Generally, no § 104(c) extension is available when the beneficiary is immediately eligible for the approved employment-based immigrant classification and the per-country limitation is no longer the reason the immigrant classification cannot be granted. There is no general rule requiring Form I-485 to be filed within one year of a priority date becoming current in order to preserve § 104(c) eligibility.
If the Department of Labor denies or revokes the qualifying labor certification, § 106(a) eligibility can end when the decision becomes final. A timely BALCA appeal keeps the labor-certification matter pending for purposes of the AC21 extension analysis until the appeal is resolved or the certification otherwise becomes finally denied or invalid.
Official U.S. Government References
• USCIS Official AC21 Guidance: uscis.gov/ac21
• USCIS Form I-129 Petition for Nonimmigrant Worker: uscis.gov/i-129