IRS CPEO List: Entries, Status Changes, and Quarterly Checks

The IRS publishes its official list of Certified Professional Employer Organizations on irs.gov under the page titled “CPEO Public Listings,” and it is the only reliable way to confirm that a PEO actually holds federal certification.¹ No industry directory, provider brochure, or third-party site substitutes for it. If the PEO handling your payroll is not on that list, or its status has changed since you last looked, you may be personally on the hook for federal employment taxes you assumed someone else was paying.

Where the List Lives and How Often It Changes

Search irs.gov for “CPEO Public Listings” or navigate through the Tax Professionals section of the site. The IRS is required by statute to publish and maintain the list.¹

Newly certified CPEOs are added to the list by the 15th day of the first month of each calendar quarter.¹ Suspensions and revocations can appear between those quarterly updates. Existing and potential customers can verify current status, including whether an organization has been suspended or revoked, directly from the listing.²

What Each Entry Shows

Each listing includes the CPEO’s legal business name, Employer Identification Number, state of location, effective date of certification, and current certification status.

Three fields deserve attention every time you check:

Certification status. “Certified” is the only status that supports the federal employment tax liability shift. If you see “Suspended” or “Revoked,” act the same day.
EIN match. Confirm the EIN on the list matches the EIN in your service contract. Large PEO groups sometimes operate through several legal entities, and certification attaches to a specific entity, not to a parent company or a brand name.
Effective date. The statutory protections under IRC Section 3511 only apply from the date the CPEO was certified forward. Work performed before that date does not carry them.

If any of those three do not line up, the liability shift you are counting on may not exist for your arrangement.

Why the Status on the List Matters

Hundreds of PEOs operate in the United States, but only a fraction are federally certified. The CPEO program is a voluntary certification created by the Tax Increase Prevention Act of 2014 and administered by the IRS.³

With a standard PEO, the client business typically remains on the hook for all federal employment taxes regardless of the contractual arrangement. With a CPEO, the law treats the CPEO as the employer for federal tax purposes and shifts primary liability away from the client.⁴ The shift covers FICA, FUTA, and federal income tax withholding on wages the CPEO actually pays. The CPEO holds primary liability. The client is secondarily liable, so the IRS can still pursue you if the CPEO fails to pay and cannot be collected from.

That secondary exposure is the whole reason to keep watching the list. A CPEO that has lost certification is, for federal employment tax purposes, no longer standing between you and the IRS.

Limits on the Liability Shift You Should Know Before Relying on It

The list tells you whether a provider is certified. It does not tell you whether every worker on your payroll is covered by the shift, and two limits catch business owners off guard.

The first is the worksite-employee rule. A “worksite employee” is a covered employee who works at a location where at least 85% of the people performing services for your business are also covered under the CPEO agreement.⁵ For worksite employees, the CPEO is solely liable for federal employment taxes. For non-worksite employees, both the CPEO and the client may share liability on the wages the CPEO pays them.⁶ Self-employed individuals, including partners in a partnership that is a customer, are specifically excluded from the definition of worksite employee.⁴ If your workforce is spread across multiple sites where the 85% threshold is not met, the clean liability shift may not fully apply.

The second is the related-party bar. If the customer has a 10% or greater ownership relationship with the CPEO (using the related-party rules of IRC Sections 267(b) and 707(b), modified to a 10% threshold instead of 50%), the entire liability shift is unavailable.⁴ Captive arrangements between related businesses do not get Section 3511 treatment even if the CPEO is on the list.

The liability shift also only reaches wages paid through the CPEO. If your business pays any employee directly outside the CPEO arrangement, you remain fully responsible for employment taxes on those wages, and you always remain responsible for other federal obligations such as corporate income tax.

Confirming the Paperwork Behind Your Listing Match

Two things must be in place for the shift to actually take effect once you have confirmed your CPEO on the list. Your service contract must include the exact legal name and EIN of the CPEO that will handle your federal employment tax obligations, and it should acknowledge the CPEO’s responsibility for calculating, withholding, and depositing employment taxes on wages it pays to your worksite employees.⁶

The CPEO must also file Form 8973, the formal notice to the IRS that a service contract has started or ended. The CPEO files it, not the client, generally within 30 days of the contract start or end. A newly certified CPEO gets six months from its certification notice to file Forms 8973 for its existing customers.⁷ If Form 8973 is not filed on time, the statutory shift may not take effect. Ask your provider to confirm in writing that it has been filed for your account.

What to Do If the Status Changes

Certification is not permanent. The IRS can suspend a CPEO temporarily for issues such as failing to maintain the required surety bond or missing an attestation deadline. Suspension is a signal that something has gone wrong and may be fixable. Revocation is permanent and typically follows severe or repeated compliance failures.

When a CPEO loses certification, Section 3511 treatment ceases. Primary federal employment tax liability shifts back to you as the client. You must immediately begin making employment tax deposits and filings under your own EIN. At that point, the former CPEO is treated as a predecessor employer and you as the successor for wage base purposes, which preserves Social Security and FUTA wage base continuity for the rest of the calendar year.⁴

The cost of missing a status change is steep. If you keep assuming the CPEO is handling your taxes after certification has been pulled, failure-to-deposit and failure-to-file penalties accumulate under your own EIN. Nobody warns you in real time. The list is where you find out.

Build a Quarterly Check into Your Payroll Calendar

Verify your CPEO on the IRS list at least quarterly, and pair each check with a request for proof of recent federal tax deposits from your provider. Match the legal name, match the EIN, confirm the status still reads “Certified,” and note the effective date the first time you look. Two minutes a quarter is cheap insurance against a scenario where the taxes withheld from your employees’ paychecks are not reaching the IRS.

1
Internal Revenue Service. Certified Professional Employer Organization (CPEO) Public Listings
2
Internal Revenue Service. About the Voluntary Certification Program for Professional Employer Organizations
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Internal Revenue Service. About the Certified Professional Employer Organization Program
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Office of the Law Revision Counsel. 26 US Code 3511 – Certified Professional Employer Organizations
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eCFR. 26 CFR 301.7705-1 – Certified Professional Employer Organization
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Internal Revenue Service. CPEO Customers – What You Need to Know
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Internal Revenue Service. Instructions for Form 8973