H-1B Concurrent Employment: Second Petition, Wages, and Taxes

H-1B concurrent employment lets you hold two or more H-1B jobs at the same time, with each employer filing its own separate petition and its own certified Labor Condition Application. The second job can be full-time or part-time, but it has to independently qualify as a specialty occupation, and each employer carries its own wage and paperwork obligations. Once the second employer properly files the petition, you can generally begin working right away under H-1B portability.

Who Can Take a Second H-1B Job

Any employer can petition for a worker who already holds H-1B status with someone else. The rule sits at 8 CFR 214.2(h)(2)(i)(C), and it requires the new employer to include a copy of your current I-94, the existing I-797 approval notice, and a letter from your current employer describing the terms of your existing job.¹ Both roles have to meet the specialty-occupation standard: each one genuinely requires at least a bachelor’s degree in a related field.

If you were already counted against the H-1B cap in a prior year (through a prior lottery selection, for instance), adding a concurrent employer does not send you back through the lottery, no matter what type of employer either one is.

How the H-1B Cap Affects a Concurrent Filing

The cap question matters most when your primary employer is cap-exempt. If you work at a university or a nonprofit research institution and pick up a concurrent role at a private company, that private employer’s petition does not need a lottery selection. USCIS treats you as maintaining valid H-1B status through the cap-exempt job, so the cap-subject employer can file at any time.²

The catch is real. This whole arrangement hinges on the cap-exempt job. If you leave the university, or the university withdraws its petition, the cap-subject petition can be revoked, because you were never independently counted against the cap. Think of the cap-exempt job as the load-bearing wall. Quitting it without having been cap-counted somewhere along the way can bring both positions down.

What the Second Employer Has to File

Before anything else, the new employer needs a certified Labor Condition Application from the Department of Labor. The LCA is the employer’s binding promise to pay at least the prevailing wage for that occupation in that geographic area.³ The LCA has to be certified before the employer files the I-129.

On Form I-129, the employer must select option “D” in Part 5, labeled “New concurrent employment.”⁴ Getting this box right is not a formality. If the petition is filed as a transfer or change of employer, USCIS may read it as replacing your existing job rather than adding a second one, which can end your authorization with the original employer.

The concurrent filing package should include:

Your current I-94 arrival/departure record.
The I-797 approval notice for the existing H-1B petition.
A letter from the current employer describing the terms of that job.
Recent pay stubs showing you are actively working and maintaining status with the current employer.
Educational credentials showing you qualify for the new specialty-occupation role.

The regulation specifically calls out the current-employer letter, the I-94, and the I-797 as requirements for concurrent filings.¹

When You Can Start the Second Job

You do not have to wait for approval. Under the H-1B portability provision at 8 U.S.C. § 1184(n), a worker already in valid H-1B status can begin working for a new petitioning employer as soon as that employer properly files a non-frivolous I-129.⁵ USCIS has confirmed portability applies to concurrent filings, not just employer-to-employer transfers.²

Once USCIS receives the petition it issues an I-797C receipt notice with the filing date and case number.⁶ Keep it. That receipt is what the second employer relies on to put you on payroll while the case is pending. Standard processing runs several months, and employers who want a faster decision can pay for premium processing, which requires USCIS to act within 15 business days. The premium processing fee for an H-1B on Form I-129 is $2,965 as of March 1, 2026.⁷

If the concurrent petition is ultimately denied, you must stop working for the second employer immediately. Portability authorization runs only until adjudication, and a denial ends it.⁵

Each Employer’s Wage Obligation Stands Alone

Every H-1B employer must pay at least the higher of the prevailing wage for the occupation in that geographic area or the actual wage the employer pays other employees in the same role with similar qualifications.⁸ In a concurrent setup, those obligations are completely independent. Neither employer can count what the other pays you toward its own wage floor, and neither can pay less because you earn income elsewhere.

For a part-time concurrent role, the wage is prorated. If the full-time prevailing wage for a software engineer in a metro area is $120,000 and the concurrent job is 20 hours per week, the second employer has to pay at least roughly $60,000 annually. Calling it a side job does not lower the floor.

Part-Time Concurrent Positions

The second job does not have to be full-time. Part-time concurrent H-1B arrangements generally mean fewer than 35 hours per week. There is no regulatory minimum, but the specific hours have to be stated in the petition, and you have to actually work at least that many. If the petition says 20 hours, the employer needs to provide 20 hours of work and pay the prorated wage every week. A part-time LCA pegged at 20 hours does not let an employer swing the schedule between 5 and 30 hours depending on demand.

What Happens if One Job Ends

The fallout depends on which job ends and how the cap applied to your situation.

If the secondary employer ends the concurrent role, your primary H-1B status is unaffected and the primary petition remains valid for its approved duration. The terminated employer has to notify USCIS so the concurrent petition can be revoked, and must give you written notice of termination.⁹ No grace period is needed, because you still have active employment with the primary employer.

If the primary employer ends the job, it depends on whether you were ever counted against the cap. Workers who took a cap-subject concurrent job while relying on a cap-exempt primary employer can lose the concurrent petition when the cap-exempt job ends, because the cap-subject petition’s validity depended on that cap-exempt employment continuing.² Workers who were previously counted against the cap do not automatically lose the concurrent petition when the primary job ends; the concurrent employer’s petition can effectively become your sole H-1B, though USCIS may need to be notified and the arrangement updated.

If you lose a position and have no other active petition, you are eligible for a discretionary grace period of up to 60 consecutive days, during which you are considered to be maintaining status and can look for new employment.¹⁰

The Tax Problem Two Employers Create

Two employers withholding independently is where concurrent H-1B workers get surprised. Each employer withholds Social Security tax (6.2% of wages) up to the annual wage base, which is $184,500 for 2026.¹¹ Neither employer sees what the other withholds. So if you earn $120,000 from one and $90,000 from the other, both employers withhold Social Security tax on your full wages with them, even though only $184,500 of your combined $210,000 is actually subject to the tax.

You claim the overpayment as a credit against income tax on your annual return. The Instructions for Form 1040 include a worksheet for calculating excess Social Security tax when it results from multiple employers, and each spouse on a joint return calculates their excess separately.¹² Medicare tax has no wage cap, so there is nothing to reclaim there.

Federal and state income tax withholding is a separate problem. Two employers each running the standard withholding tables will each treat your wages with them as your only income, and neither one accounts for the combined total pushing you into a higher bracket. Review your W-4 with each employer early in the year, or make estimated tax payments, to avoid a bill in April.

Traveling Abroad With Two Petitions

Carry the I-797 approval notices for every active H-1B petition when you cross the border. A valid H-1B visa stamp covers your re-entry in H-1B status, but Customs and Border Protection officers can ask about your employment, and having documentation for each employer keeps things simple at the port of entry.

If your concurrent petition has been filed but not yet approved, bring the I-797C receipt notice along with the approval for the primary petition. Re-entering on a pending concurrent petition means relying on portability, and CBP officers have discretion at the border. When timing allows, traveling after both petitions are approved is the safer path.

1
eCFR. 8 CFR 214.2 – Special Requirements for Admission, Extension, and Maintenance of Status
2
U.S. Citizenship and Immigration Services. H-1B Specialty Occupations
3
eCFR. 20 CFR 655.730 – What Is the Process for Filing a Labor Condition Application
4
U.S. Citizenship and Immigration Services. Instructions for Petition for Nonimmigrant Worker
5
Office of the Law Revision Counsel. 8 USC 1184 – Admission of Nonimmigrants
6
U.S. Citizenship and Immigration Services. Form I-797C, Notice of Action
7
U.S. Citizenship and Immigration Services. USCIS to Increase Premium Processing Fees
8
eCFR. 20 CFR 655.731 – What Is the First LCA Requirement, Regarding Wages
9
U.S. Department of Labor. Termination Notice – H-1B Advisor
10
U.S. Citizenship and Immigration Services. Options for Nonimmigrant Workers Following Termination of Employment
11
Social Security Administration. Contribution and Benefit Base
12
Internal Revenue Service. Excess Social Security and RRTA Tax Withheld