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Usually, an approved I-140 by itself is not enough to change employers while keeping the same adjustment case. Most employment-based applicants use AC21 portability only after a properly filed Form I-485 has been pending for at least 180 calendar days, remains unadjudicated, and the new offer is permanent and in the same or a similar occupational classification. The 180-day clock starts on the I-485 filing date—not the I-140 approval date.
When those conditions are met, you normally request portability with Form I-485 Supplement J. Your priority date, the continuing validity of the approved I-140, and your ability to use a new job offer are related but separate issues. Keeping those rules distinct prevents a premature job change from damaging the adjustment case.
The rule in one sentence
Under section 204(j) of the American Competitiveness in the Twenty-First Century Act (AC21), an employment-based adjustment applicant may generally change to a new employer without filing a new I-485 when:
- the underlying petition is EB-1, EB-2, or EB-3;
- the I-140 is approved, or a pending I-140 is ultimately approved;
- the properly filed I-485 has been pending for at least 180 calendar days when U.S. Citizenship and Immigration Services (USCIS) receives the portability request;
- the I-485 is still unadjudicated; and
- the new offer is permanent and in the same or a similar occupational classification as the job in the original petition.
The standard request is Form I-485 Supplement J. The new employer does not “take over” the old I-140. Instead, you ask USCIS to accept a qualifying new permanent job offer for the pending adjustment application.
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Three protections that are often confused
An approved I-140 can produce several different protections. They do not arise at the same time and do not substitute for one another.
| Question | AC21 portability for a pending I-485 | Retention of an approved I-140 and its priority date |
|---|---|---|
| What is preserved? | The ability to rely on a qualifying new permanent job offer for an eligible pending adjustment case | The earlier priority date for use with a later qualifying employment-based petition, and in some circumstances continued validity of the approved petition |
| Main timing rule | The I-485 must have been pending at least 180 days when USCIS receives the portability request | For continued I-140 validity after withdrawal or business termination, the relevant threshold is generally 180 days after I-140 approval or 180 days of associated I-485 pendency |
| Does a new job have to qualify? | Yes. The new permanent job must be in the same or a similar occupational classification | No. Priority-date retention does not itself provide a qualifying job offer |
| What filing or action is used? | Form I-485 Supplement J | A later employment-based petition may be needed; retaining a date is not a portability request |
| Important limit | The petition must be approved or ultimately approved, and every portability condition must be met | Substantive revocation grounds can still defeat the petition or the retained date; retention does not guarantee adjustment approval |
The Department of Homeland Security’s November 18, 2016, final rule treats these protections separately. A preserved priority date is not the same thing as a portable job offer.
When the 180-day portability clock starts
USCIS counts from the date it receives a properly filed I-485, not from the date it approves the I-140. The case must remain pending and unadjudicated while the days accumulate.
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That means weekends and holidays count. A receipt date is more useful than the date a filing was mailed, and an I-485 that USCIS rejected or never properly accepted does not start a valid portability period. If USCIS approves the I-485 before receiving the portability request, there is no pending adjustment case to port.
How to calculate your earliest filing date
- Find the “Received Date” on your I-485 receipt notice.
- Confirm that the filing was accepted as properly filed rather than rejected.
- Count 180 calendar days beginning with that filing date, following USCIS’s counting method.
- Confirm through your case record that the I-485 remains pending on the day USCIS will receive Supplement J and the supporting evidence.
- Do not replace this calculation with the I-140 approval date, the priority date, the labor-certification date, or the date you started working for the original employer.
Filing Supplement J before the threshold does not create eligibility. If the I-485 has been pending fewer than 180 days when USCIS receives the request, an approved I-140 generally does not remain valid for a new job offer under this portability rule.
Eligibility checklist before you resign
1. Confirm the employment category
AC21 portability described by USCIS applies to EB-1, EB-2, and EB-3 employment-based cases. The category on the I-140 approval notice should match one of those classifications. Other employment categories may have different rules and should not be assumed to qualify.
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2. Verify the I-140 status
USCIS generally requires an approved I-140, or a pending I-140 that is ultimately approved, before it can approve the portability request. A receipt notice alone is not an approval. If the petition is still pending, the portability analysis remains contingent on its eventual approval.
3. Verify that the I-485 is both old enough and still pending
The 180-day requirement is measured when USCIS receives the request. An I-485 that was filed 180 days ago but has already been approved, denied, withdrawn, or otherwise ended cannot be used as a pending adjustment case for this purpose.
4. Obtain a genuine permanent offer
The new position must be intended as permanent employment, not a temporary assignment or an arrangement that ends on a predetermined short-term date. The offer should identify the employer, title, duties, work location, full-time or other employment terms, and the intention to employ you on a permanent basis if the adjustment is approved.
5. Compare the occupational classification
The new position must be in the same or a similar occupational classification as the position described in the original I-140. Compare the actual duties and the occupation represented in the petition, not just the job titles. Titles can differ while the work remains similar, and identical titles do not automatically make two jobs equivalent.
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For portability requests made on or after January 17, 2017, USCIS identifies Form I-485 Supplement J as the required form. Use the current edition and filing instructions, because USCIS can change editions, addresses, fees, and submission procedures.
Step-by-step portability process
- Collect the original case records. Keep the I-140 approval notice, I-485 receipt notice, priority-date information, labor-certification or petition job description, and any USCIS correspondence together. These documents establish the dates and job against which the new offer is evaluated.
- Check the 180-day date. Use the I-485 received date and count calendar days. Write down the date on which day 180 is reached and allow enough delivery time so USCIS receives the request after the threshold, not merely after you mail it.
- Obtain a detailed permanent offer from the new employer. The employer should complete the employer portion of Supplement J and provide a signed offer describing the position. Make the duties specific enough for USCIS to compare the occupations.
- Document the same-or-similar analysis. Include a clear explanation of how the new role relates to the original role. Supporting materials may include the two job descriptions, organizational information, professional qualifications, and an explanation of any change in title, location, seniority, or duties.
- File Supplement J using the current USCIS instructions. Submit it through the method and address USCIS currently designates for your situation. If USCIS requests the form during I-485 processing, respond by the deadline in the notice.
- Keep working lawfully during the transition. Portability under AC21 does not itself grant work authorization. Continue relying on valid employment authorization, an appropriate nonimmigrant status, or another lawful basis while the case is pending.
- Respond to requests for evidence. USCIS may ask for proof of the original job, the new permanent offer, the I-485 receipt date, the I-140’s status, or the relationship between the occupations. Answer with consistent documents and an explanation tied to the legal requirements.
- Preserve records after filing. Keep the filed Supplement J, delivery confirmation, employer letter, job descriptions, pay records, and notices. USCIS may examine whether the offer remained genuine through adjudication.
What happens if the original employer withdraws the I-140?
Withdrawal timing affects the petition’s continuing validity, but it does not eliminate the separate portability requirements.
| Situation | General USCIS treatment | What it does not establish |
|---|---|---|
| Withdrawal before 180 days have elapsed since I-140 approval, while the associated I-485 has not been pending 180 days or was never filed | USCIS generally automatically revokes the I-140 approval | It does not create a right to port through a new employer |
| Withdrawal 180 or more days after I-140 approval, or after the associated I-485 has been pending at least 180 days | The approved petition generally remains valid for priority-date retention, subject to substantive revocation grounds | It does not waive the same-or-similar job test or the I-485’s 180-day portability threshold |
| Business termination or a similar event after the applicable 180-day protection | The petition generally remains valid for priority-date retention, subject to the same substantive limits | It does not supply a new permanent job offer for the pending I-485 |
If you are not eligible to port and need a new adjustment application, USCIS says a new employment-based petition is required. A retained priority date can often be requested for that later petition, but it does not convert an unrelated job into a qualifying offer under the old I-485.
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How USCIS evaluates “same or similar” work
USCIS evaluates the occupational relationship between the original sponsored job and the new permanent job. Start with substance rather than labels:
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- Describe the occupational classification represented by each role.
- Explain changes in title, department, worksite, reporting line, seniority, or compensation instead of leaving USCIS to infer why the jobs are related.
- Distinguish a normal career progression from a move into a materially different occupation.
- Make sure the employer’s Supplement J, offer letter, résumé, and other filings do not describe conflicting duties.
There is no universal shortcut such as matching a job title or using the same industry. A careful explanation is especially important when the new role has a different title, substantially different technology or specialization, supervisory responsibility, or work location. The evidence should let USCIS compare the two occupations without relying on assumptions.
Priority-date retention: useful, but not a substitute for portability
The priority date is the place in the visa queue assigned to an employment-based case. If an approved I-140 remains valid for retention purposes after a qualifying withdrawal or business termination, the beneficiary may generally use that earlier date with a later qualifying employment-based petition, subject to visa-availability and other requirements.
That protection answers a date question: “Can I carry the earlier place in line to another petition?” AC21 portability answers a different job question: “Can this new permanent offer support my already pending I-485?” A retained date does not by itself keep the old I-485 approvable, authorize a job change, or guarantee that a later adjustment application will be approved.
A narrow 2024 ability-to-pay point
In January 2024, USCIS announced guidance for certain adjustment applicants who change employers under AC21 while the I-140 is pending. In the cases described by the agency, the ability-to-pay review looks at facts from the priority date through the I-140 filing date. USCIS said the guidance applies prospectively to petitions filed on or after publication.
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This is a limited rule about the underlying petition’s ability-to-pay analysis. It should not be read to mean that a new employer automatically inherits every obligation of the former petitioner or that the new employer’s finances are irrelevant to the new offer.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Common mistakes and how to correct them
Counting from I-140 approval
Problem: You assume approval starts the 180-day portability clock.
Correction: Recalculate from the I-485 received date and confirm the case is still pending when USCIS receives Supplement J.
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Leaving before the I-485 reaches 180 days
Problem: You change jobs based only on the approved I-140.
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1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problemsCorrection: An approved petition does not, by itself, make a new offer portable. Before day 180, obtain case-specific advice about the risk and possible need for a new petition and I-485.
Assuming priority-date retention equals job portability
Problem: You believe a preserved date lets any employer support the existing adjustment case.
Correction: Treat date retention and AC21 portability as separate analyses. The new job still must satisfy the same-or-similar requirement for the pending I-485.
Submitting Supplement J with an inadequate job description
Problem: The form contains only a title and a generic sentence about employment.
Correction: Provide a specific, internally consistent description of the permanent duties and explain how they relate to the original position.
Ignoring withdrawal or revocation history
Problem: You rely on an approval notice without checking whether the petition was withdrawn or whether USCIS raised a substantive revocation issue.
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Correction: Review all notices and employer communications. The 180-day protections do not prevent revocation for substantive grounds.
Using an outdated form or filing address
Problem: You download an old Supplement J edition or send it to an address no longer listed by USCIS.
Correction: Verify the current form edition, instructions, filing location, and any fee or delivery requirements immediately before filing.
Illustrative timelines
Timeline A: I-140 approved before the I-485 reaches 180 days
You file the I-485 on March 1 and the I-140 is approved on May 15. The I-140 approval does not make the case portable on May 15. The relevant threshold remains 180 calendar days from the March 1 I-485 filing, and the I-485 must still be pending when USCIS receives the portability request.
Timeline B: I-485 has passed 180 days, but the job is materially different
You reach day 180 and receive an offer in a substantially different occupation. The timing requirement may be satisfied, but the same-or-similar occupational requirement is not automatically satisfied. The issue is the relationship between the two jobs, not simply the passage of time.
Timeline C: Employer withdraws after the protected period
The original employer withdraws after the applicable 180-day protection. The approved I-140 may generally remain valid for priority-date retention, subject to substantive revocation grounds. You still need a qualifying permanent offer and an eligible pending I-485 to use AC21 portability.
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When a new petition and adjustment application may be necessary
If the I-485 was never properly filed, has not been pending 180 days when USCIS receives the request, has already been decided, or cannot be supported by a same-or-similar permanent job, the existing case may not be portable. A new employer may need to file a new employment-based petition, and you may need a new I-485 when visa availability and other requirements permit.
A previously retained priority date may be requested for the later petition when the rules allow it. That date does not eliminate the new petition’s requirements, establish eligibility for the new job, or guarantee that the new adjustment application will be approved.
Documents to assemble before changing jobs
- I-140 approval notice and any later USCIS notices concerning withdrawal, revocation, or an amended filing
- I-485 receipt notice showing the received date
- Current case-status information confirming the I-485 remains pending
- The original petition’s job description and occupational information
- The new employer’s signed permanent-offer letter and completed Supplement J
- A side-by-side explanation of the original and new duties
- Evidence of lawful work authorization and immigration status during the transition
- Delivery proof and a complete copy of everything submitted to USCIS
Because the result depends on the petition category, exact receipt and approval dates, current case status, job duties, and withdrawal or revocation history, a lawyer can evaluate facts that a general checklist cannot. Confirm the current USCIS instructions before filing; forms, editions, addresses, and procedures can change.
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