How to Handle ITIN Payroll

Can someone who holds an ITIN be on your payroll? Yes, when they are authorized to work in the U.S. and the employee Social Security number (SSN) rules are met: the employee has an SSN, or has applied for one. What you can’t do is use the ITIN itself in place of an SSN. An ITIN is a tax-processing number. It doesn’t authorize work, and the IRS says not to use it for employee identification or on a W-2.

Employers look up ITIN payroll when a new hire hands over a number that starts with 9, or doesn’t have a Social Security number yet. PayNortheast can help New York employers pay employees who hold ITINs once those conditions are met, and handle the payroll reporting. An ITIN is not a substitute for an employee’s SSN.

This guide explains what an ITIN is for, how it differs from an SSN, and what the IRS and Social Security Administration tell employers to do when a worker who is authorized to work has applied for an SSN but hasn’t received it yet. The federal rules apply the same way in New York.

What an ITIN is, and what it isn’t

The IRS issues ITINs for federal tax purposes only, to people who need a U.S. taxpayer identification number but aren’t eligible for an SSN. It’s a 9-digit number that starts with 9 and is formatted like an SSN.

According to the IRS, an ITIN doesn’t:

• Authorize someone to work in the U.S.
• Provide or change immigration status.
• Qualify someone for Social Security benefits.
• Serve as identification outside the federal tax system.

People use ITINs to file tax returns, claim certain tax benefits, or be listed as a spouse or dependent. That’s a different job from payroll.

ITIN payroll: why an ITIN can’t replace an SSN

The IRS is direct about this. Its hiring guidance and the Form W-2 instructions both say: do not accept an ITIN in place of an SSN for employee identification or for work, and don’t put an ITIN in box a (Employee’s social security number) on Form W-2.

Here’s why it matters. The IRS uses SSNs to match the wages you report against employees’ tax returns, and Social Security uses them to record each employee’s earnings for future Social Security and Medicare benefits. A wrong number on a W-2 can mean mismatched records, and the IRS says employers may owe a penalty for an incorrect name or SSN unless they have reasonable cause.

If you run payroll with PayNortheast, your account manager collects new-hire details during onboarding and flags a missing SSN before it causes problems at year end.

Work authorization is a separate step: Form I-9

Whether someone can work for you is decided by employment eligibility, not by their tax number. Every U.S. employer must complete Form I-9 for every new hire, citizens and noncitizens alike, to verify identity and employment authorization. USCIS publishes the list of acceptable documents, such as a U.S. passport, a permanent resident card or an Employment Authorization Document (Form I-766).

An ITIN isn’t proof of work authorization. The IRS also notes that a person with an ITIN who later becomes eligible to work in the U.S. must get an SSN. Once they have one, the IRS tells them to stop using the ITIN and use the SSN for tax purposes.

When an authorized worker is still waiting for an SSN

Some workers are authorized to work but have only just applied for an SSN. Social Security says the employee may work while the SSN application is being processed. Its employer guidance says to:

1. Tell the worker to apply for a Social Security number and card, if they haven’t already.
2. Record their details as completely as possible, including full name, address, date of birth and the date they applied.
3. Ask them to bring you the number, and the exact name printed on the card, as soon as they receive it.

If W-2s are due before the number arrives: on paper Forms W-2, enter “Applied For” in box a. If you file electronically, enter zeros instead (000-00-0000 when creating forms online, or 000000000 when uploading a file).

When the number arrives later: file Form W-2c to correct the earlier report with the employee’s SSN, and give the employee a copy.

What this means for New York employers

SSN and ITIN rules for wage reporting are federal, so they’re the same for a business on Long Island, in New York City or upstate. New York doesn’t provide a separate way to use an ITIN for employee payroll. Your usual New York steps, such as withholding certificates and new hire reporting, still apply to every employee.

Everyone’s situation is different. If you’re unsure whether a worker is authorized to work, or how to report someone’s wages, talk with your tax advisor or an employment attorney before you run payroll.

Quick checklist

• Complete Form I-9 for every new hire.
• Collect the employee’s SSN, and match the name to the Social Security card. Our guide on how to fill out a W-4 covers the withholding form.
• Don’t accept an ITIN in place of an SSN, and never put one in W-2 box a.
• If an authorized worker has applied for an SSN, keep their details and follow up.
• Use “Applied For” (paper) or zeros (electronic) only if the SSN hasn’t arrived when W-2s are due.
• File a W-2c once the SSN arrives. See our year-end payroll checklist for W-2 timing.

ITIN payroll FAQ

Can an employee who holds an ITIN be paid on a W-2? Yes, if they are authorized to work in the U.S. Their W-2 shows their SSN, or “Applied For” (zeros if e-filed) when they have applied and the number hasn’t arrived by filing time. The IRS says not to accept an ITIN in place of an SSN for employee identification or for work, and not to enter an ITIN in W-2 box a.

Can PayNortheast run ITIN payroll for my New York business? We can pay employees who hold ITINs once they are authorized to work and have an SSN or have applied for one, and we handle the payroll taxes and W-2 reporting. We can’t use an ITIN in place of an SSN.

Does an ITIN mean someone can’t ever work in the U.S.? No. An ITIN simply doesn’t authorize work. The IRS says a person with an ITIN who later becomes eligible to work must get an SSN, and then stop using the ITIN.

Can I pay a worker as a contractor instead? Not to avoid these rules. Whether someone is an employee or an independent contractor depends on the working relationship, under the IRS common-law rules, not on which tax number they have.

Is the rule different in New York? No. ID rules for federal wage reporting are the same in every state.

What if an employee gave me an ITIN by mistake? Ask for their SSN, and talk with your tax advisor or an employment attorney about correcting past filings.

Sources: IRS, Hiring employees; IRS, General Instructions for Forms W-2 and W-3 (2026); IRS, Individual taxpayer identification number (ITIN); Social Security Administration, Employer responsibilities when hiring foreign workers; IRS, Independent contractor (self-employed) or employee?; USCIS, Form I-9 acceptable documents