The six-year maximum period of admission in H-1B status is not the end of the road for employees with permanent residence cases in progress. Two provisions of the American Competitiveness in the Twenty-First Century Act create extensions beyond that limit, and each depends on a different milestone in the green card process. Understanding which applies — and when the clock starts — prevents avoidable gaps in work authorization.
One-year extensions based on a pending case
Where a labor certification or an immigrant petition was filed at least 365 days before the end of the sixth year and remains pending or approved without a final decision on adjustment, extensions may be granted in one-year increments. The critical detail is the 365-day lead time: filings made late in the sixth year do not qualify, which is why permanent residence planning should begin in the fourth year rather than the fifth.
Three-year extensions based on visa unavailability
Where an immigrant petition is approved but a visa number is not immediately available because of per-country backlogs, extensions may be granted in three-year increments. For nationals of heavily oversubscribed countries this is the practical mechanism that sustains long-running employment while the priority date advances.
- One-year increments: qualifying filing pending 365+ days.
- Three-year increments: approved I-140 with no visa number available.
- Time spent outside the United States can be recaptured against the six years.
What the approved I-140 preserves
An approved immigrant petition establishes a priority date that the beneficiary generally retains for future petitions, including with a new employer, unless the approval is revoked for fraud, misrepresentation, or material error. Once the petition has been approved for 180 days or more, ordinary employer withdrawal does not strip its validity for extension and priority-date purposes. This is what makes mobility possible for employees deep in a backlog.
Practical sequencing for employers
Track two dates for every sponsored employee: the sixth-year end date and the 365-day threshold that precedes it. Start the labor certification process early enough that recruitment, filing, and processing all complete before that threshold. Keep copies of approval notices with the employee as well as in company records — a future employer will need them to establish priority date retention, and reconstructing them years later is slow.
Key takeaways
- Begin permanent residence filings by year four to clear the 365-day rule.
- Approved I-140 plus backlog equals three-year extension increments.
- Priority dates generally survive an employer change after 180 days.
- Recapture time spent abroad to extend the usable six years.
- Give employees their own copies of every approval notice.
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