H-1B Extension of Stay: Six-Year Cap, AC21, and Filing

An H-1B extension of stay is filed by your employer on Form I-129 up to six months before your current I-94 expires, and if the petition is received on time you can keep working for the same employer for up to 240 days past that expiration date while USCIS decides. Within the standard six-year cap, extensions come in increments of up to three years. Beyond six years, AC21 opens two separate paths, each with its own eligibility rule. The mechanics are not complicated, but the timing is unforgiving, and a late or defective filing can cost you both work authorization and future admissibility.

The Six-Year Cap and the Two Ways Past It

An H-1B worker is initially admitted for up to three years, then extended for another three, for a total of six.¹ Federal regulations treat six years as a hard ceiling for most H-1B workers.² Inside that window an extension is routine: the employer files a new petition, and if approved you get more time up to the six-year total.

Past six years, the American Competitiveness in the Twenty-first Century Act (AC21) provides two options, and which one applies depends on where you stand in the green card process.

One-Year Extensions (AC21 Section 106)

If at least 365 days have passed since your employer filed a labor certification with the Department of Labor or an I-140 immigrant petition with USCIS, and that application is still pending, you qualify for extensions in one-year increments. These continue until a final decision is reached on the underlying green card application.³

Three-Year Extensions (AC21 Section 104(c))

If you have an approved I-140 but cannot get a green card solely because of per-country visa limits, extensions come in three-year increments. The employer must show that no immigrant visa number was available on the date the H-1B extension was filed, based on your priority date and the State Department’s Visa Bulletin.³ This is the path most commonly used by workers from countries with heavy backlogs, particularly India and China.

When to File

USCIS allows employers to file an H-1B extension petition up to six months before your current I-94 expiration date. Filing early is the single most important thing you can do to protect yourself. Standard processing can stretch well past six months, and a request for evidence adds weeks or months on top of that.

The petition must be received by USCIS while you are still in a valid period of authorized stay. If your I-94 has already expired and no timely extension was filed, you cannot fix the problem from inside the country. That distinction between “filed a little late” and “filed on time” can be the difference between continuing to work and having to leave.

What Your Employer Files

The employer files Form I-129 with the H Classification Supplement. The petition must include a certified Labor Condition Application (Form ETA 9035) from the Department of Labor that covers the full period of the requested extension. If the previous LCA has expired, or the job location or wage level has changed, the employer needs a new certification before filing.⁴

The package should also include:

Copies of all Form I-797 approval notices from previous H-1B petitions.
Your most recent I-94 arrival/departure record.
A copy of every page in your current passport, which should remain valid for the duration of the requested stay.
Recent pay stubs and the employer’s financial documentation showing ability to pay the offered wage.
Transcripts and diplomas confirming you meet specialty occupation requirements.
If seeking an extension beyond six years, copies of the pending or approved labor certification and I-140 petition.
If claiming time spent abroad, passport stamps, I-94 records, or flight itineraries showing the dates of absence.

If your job duties, title, or work location have changed significantly since the last petition, the employer may need to file an amended petition alongside the extension request. Small mismatches, like an incorrect occupation code, can trigger a request for evidence or a rejection.

What It Costs

Extension petitions carry several fees that add up quickly. The total depends on employer size and whether exemptions apply.

Base I-129 filing fee, which varies by employer size. Check the current USCIS Fee Schedule (Form G-1055) for the exact figure.⁵
ACWIA fee of $750 for employers with 25 or fewer full-time employees, or $1,500 for larger employers. Nonprofits and certain research institutions are exempt.⁶
Asylum Program fee of $600 for employers with more than 25 full-time equivalent employees, $300 for small employers, and $0 for nonprofits.⁵
The $500 Fraud Prevention and Detection fee and the $4,000 Public Law 114-113 fee apply to initial petitions and employer changes, not to extensions with the same employer.⁶⁷

Premium processing is optional and costs an additional $2,965 (effective March 1, 2026), paid by filing Form I-907. It guarantees USCIS will take action within 15 business days of receipt, but “action” can be approval, denial, or a request for evidence. It does not guarantee approval.⁸ If your I-94 expiration is close, premium processing is often worth the cost just to avoid the uncertainty of a months-long wait.

Immigration attorneys typically charge between $2,000 and $5,000 to prepare and file an extension, depending on complexity and location. Legal fees are separate from government fees and, in most cases, are paid by the employer.

Working While the Petition Is Pending

If the extension petition was filed before your current I-94 expired, you can continue working for the same employer for up to 240 days past the expiration date while USCIS decides the case.⁹ The Form I-797C receipt notice is your proof. Keep a copy with your I-9 records.

The protection has limits. The 240 days run from the I-94 expiration date, not from filing, and you can only continue in the same position with the same employer who filed the petition. If USCIS denies the extension before 240 days are up, work authorization ends immediately upon notification of the denial.⁹ If 240 days pass and the case is still pending, you must stop working but may remain in the country while you wait.

Recapturing Time Spent Outside the United States

The six-year clock counts only the days you were physically present in the United States. Every full day spent abroad can be recaptured and added back to your available H-1B time. The employer must specifically request recapture as part of the extension petition and provide documentation of your absences. Passport entry and exit stamps, I-94 records, and flight itineraries all count. USCIS will not send a request for evidence for undocumented periods; days you cannot prove abroad are simply not recaptured. The reason for travel is irrelevant, and H-4 dependents can recapture the same days as the principal H-1B holder.

If You Lose Your Job

Losing your H-1B job, whether by quitting or termination, does not immediately end your status. Federal regulations provide a grace period of up to 60 consecutive days, or until the end of your current I-94 validity, whichever is shorter.¹⁰ You cannot work during the grace period unless you have separate authorization. You get one 60-day grace period per authorized petition validity period; if you used it earlier during the current petition, you do not get another. The clock starts the day after your last day of paid employment.

The grace period exists so you can act before your status lapses. Your practical options are to find a new employer willing to file an H-1B petition, file to change to another nonimmigrant category, file for adjustment of status if eligible for a green card, or prepare to depart.¹¹

H-1B portability lets you start work with the new employer as soon as a nonfrivolous petition is properly filed, provided you were in valid H-1B status (or a timely-filed period of authorized stay) at the time of filing and the new employer has a certified LCA.²¹² Portability authorization continues as long as the new petition is pending; if it is denied, authorization ends when USCIS notifies the employer.³ One trap: portability requires that you have not engaged in any unauthorized employment since your last admission. Even a brief stretch of unauthorized work can disqualify you.

Traveling While the Extension Is Pending

International travel while an H-1B extension is pending is risky. If you leave before approval, USCIS may treat the petition as abandoned. To re-enter, you would need a valid visa stamp in your passport, and if the stamp has expired you would need to apply for a new one at a U.S. consulate before returning.

There is a narrow exception. Under automatic visa revalidation, an H-1B worker with an expired visa stamp can travel to Canada, Mexico, or certain adjacent islands for 30 days or less and re-enter without a new stamp, provided you hold a valid I-94 and have not applied for a new visa.¹³ Nationals of countries designated as state sponsors of terrorism are not eligible. If you have applied for a new visa and it has not been issued, or was denied, you also cannot use this provision. The safest approach is to avoid international travel until you have the new I-797A with an updated I-94 in hand.

If the Extension Is Denied

A denial after your original I-94 has expired puts you in a hard position. USCIS treats you as having been out of valid status as of the date your previous I-94 expired, regardless of how long the petition sat pending.³ Work authorization ends immediately upon notification.

Whether unlawful presence starts accruing depends on the circumstances. If the extension was timely filed and nonfrivolous, unlawful presence generally does not begin until the date USCIS denies the request. If the petition was frivolous, untimely, or you engaged in unauthorized employment, unlawful presence can be backdated to the original I-94 expiration. Accumulating 180 days to one year of unlawful presence triggers a three-year bar on re-entry; one year or more triggers a ten-year bar. A motion to reopen or reconsider is possible but does not restore work authorization while it is pending. In most cases the practical response is to depart promptly and, if appropriate, pursue a new H-1B petition from abroad through consular processing.

Extensions for H-4 Spouses and Children

Your spouse and unmarried children under 21 hold H-4 status tied to your H-1B. When you extend, they must separately file Form I-539 to extend their H-4 status, ideally filed at the same time as your I-129 to keep the family aligned.

An H-4 spouse may also be eligible for employment authorization if the H-1B holder either has an approved I-140 or holds H-1B status granted under the AC21 provisions for extensions beyond six years.¹⁴ The spouse files Form I-765 to obtain or renew the EAD. Renewals cannot be filed more than 180 days before the current EAD expires, and the renewed EAD’s expiration generally matches the H-4 I-94 expiration. There is no equivalent of the 240-day automatic work extension for EAD holders, so a lapse between EADs is a lapse in the spouse’s ability to work.

1
U.S. Citizenship and Immigration Services. H-1B Specialty Occupations
2
eCFR. 8 CFR 214.2
3
U.S. Citizenship and Immigration Services. FAQs for Individuals in H-1B Nonimmigrant Status
4
U.S. Citizenship and Immigration Services. Checklist of Required Initial Evidence for Form I-129
5
U.S. Citizenship and Immigration Services. H and L Filing Fees for Form I-129
6
U.S. Citizenship and Immigration Services. G-1055 Fee Schedule
7
U.S. Citizenship and Immigration Services. Fee Increase for Certain H-1B and L-1 Petitions (Public Law 114-113)
8
U.S. Citizenship and Immigration Services. USCIS to Increase Premium Processing Fees
9
eCFR. 8 CFR 274a.12
10
eCFR. 8 CFR 214.1
11
U.S. Citizenship and Immigration Services. Options for Nonimmigrant Workers Following Termination of Employment
12
U.S. Department of Labor. Fact Sheet 62W: What is Portability and to Whom Does It Apply
13
U.S. Department of State. Automatic Revalidation
14
U.S. Citizenship and Immigration Services. Employment Authorization for Certain H-4 Dependent Spouses