How to Find Your Employer Registration Number for Unemployment

To find your employer registration number for unemployment, check your state’s annual tax rate notice, a recent quarterly wage report, your original registration confirmation letter, or your payroll provider’s tax summaries. The number, sometimes called a state unemployment insurance (UI) account number or SUTA number, is assigned by your state’s workforce or labor agency and is separate from your federal EIN. If none of those documents are within reach, your state unemployment agency can look the number up using your EIN and basic business details.

Check the Paperwork You Already Have

Before contacting any agency, look through documents that already carry the number. The fastest sources are:

Your annual tax rate notice. Each year the state unemployment agency mails a notice showing your assigned contribution rate for the coming year, with your account number printed near the top.
Quarterly wage and tax reports. Every quarterly filing you or your payroll provider submits carries the registration number in the header.
The original registration confirmation. When you first registered with the state, you received a letter confirming the account and its assigned number.
Payroll provider records. Tax summaries, payment receipts, and year-end reports from a third-party payroll service all display the registration number.

Any one of these is quicker than waiting on a government response, so it’s worth a thorough search of both paper files and email before moving on.

Log Into Your State Employer Portal

Most states run an online employer portal through the department of labor, workforce commission, or employment security agency. Once you sign in, the account number is usually visible on the main dashboard or in the account profile. The portal also lets you view past quarterly filings, your tax rate history, and your experience rating, all of which show the registration number.

If you’ve never set up online access, you can generally create an account using your EIN and the business information on file with the state. Some states add a one-time identity verification step that can take a few business days before the portal unlocks. The U.S. Department of Labor keeps a directory of state unemployment agencies that points to the correct site for your state.¹

Request the Number From Your State Agency

If nothing turns up in your records or online, contact your state unemployment agency directly. Have the following ready before you call or submit a request:

Your federal Employer Identification Number. This is the primary piece of information the agency uses to locate the account. You can find it on prior IRS filings such as Form 941 or on the confirmation letter you received after filing Form SS-4.²
Your exact legal business name as registered with the Secretary of State. Even minor differences, such as dropping “LLC,” can cause a mismatch.
Your business physical address and mailing address, which the agency will compare against its records.
The principal officer’s Social Security Number. Some states use this as an added identity check before releasing account details.

Most agencies offer a dedicated employer phone line, an online contact form, and a mailing address. Phone hold times vary from a few minutes to more than an hour depending on the state and season. Written or online requests generally get a response within seven to ten business days. The U.S. Department of Labor’s state labor office directory can help you find the right contact.³

Can Your Accountant or Payroll Provider Get It for You?

A CPA, tax attorney, or payroll provider can often retrieve the number on your behalf, but state agencies require written authorization before releasing account information to anyone other than the business owner or a listed officer. Each state uses its own authorization form; there is no single federal form that grants access to a state unemployment account.

For federal tax matters, the IRS uses Form 2848 (Power of Attorney) to let a representative act on your behalf and Form 8821 (Tax Information Authorization) to let a designee view confidential tax records.⁴ Those forms do not cover state agencies. Ask your state unemployment office for the equivalent authorization; an established payroll provider will already know the process in your state.

How the State Unemployment Number Differs From Your EIN

The EIN is a nine-digit number issued by the IRS to identify a business for federal tax purposes, including income tax withholding, Social Security, Medicare, and FUTA.² The state unemployment registration number is a separate identifier issued by a state labor or workforce agency. Different format, different agency, different purpose. Mixing the two is one of the most common errors on quarterly wage reports and audit responses.

You can confirm or retrieve an EIN by requesting a business entity transcript from the IRS or by calling the IRS business and specialty tax line to ask for Letter 147C.² The state unemployment number, however, only comes from the state. The IRS cannot provide it.

What Happens If You File Without It

Filing quarterly wage reports or your annual Form 940 without the correct state account number causes problems at both levels of government. State reports may be rejected or held in suspense, delaying processing and potentially triggering late-filing penalties. On the federal side, Form 940 requires a valid state account number to claim the 5.4% FUTA credit against the 6.0% federal unemployment tax on the first $7,000 of each employee’s wages.¹⁵⁶

The IRS also charges a failure-to-deposit penalty on employment taxes that aren’t paid on time or in the right amount, with interest accruing until the balance is cleared.⁷ Tracking down the registration number before a filing deadline is far cheaper than untangling penalties afterward.

If You’ve Never Registered

If your business is new and has never registered with a state unemployment agency, there’s no number to find yet. You qualify as an employer subject to FUTA if you paid at least $1,500 in wages during any calendar quarter, or if you employed at least one person on some day in each of 20 different weeks during the current or preceding calendar year.⁸ State thresholds vary and are often similar or lower.

Registration is usually done online through the state workforce or labor agency’s website. You’ll provide your EIN, legal business name and address, the date you first paid wages, and information about your business type. Most states don’t charge a fee. Once approved, the agency assigns your registration number and mails a confirmation along with your initial tax rate. Many states require registration within 10 to 30 days of first paying wages, so don’t wait for the first quarterly report to be due.

A Note for Multi-State Employers

One registration number covers one state. If you have employees working in more than one state, you need a separate unemployment account in each state where employees perform work, and you report this on Form 940 by checking the multi-state employer box and attaching Schedule A.¹ Each state runs its own wage base, rate schedule, and registration process, so a remote hire in a state where you have no office typically means registering with that state’s agency before the first quarterly filing is due.

1
Internal Revenue Service. 2025 Instructions for Form 940
2
Internal Revenue Service. Employer Identification Number
3
U.S. Department of Labor. State Labor Offices
4
Internal Revenue Service. Power of Attorney and Other Authorizations
5
Employment and Training Administration. FUTA Credit Reductions
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Office of the Law Revision Counsel. 26 U.S. Code 3302 – Credits Against Tax
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Internal Revenue Service. Failure to Deposit Penalty
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Office of the Law Revision Counsel. 26 U.S. Code 3306 – Definitions