The IRS Form 8973 Guide: CPEO Customer Reporting Agreement

Introduction – What Is Form 8973?

IRS Form 8973, titled Certified Professional Employer Organization/Customer Reporting Agreement, is a federal tax compliance form administered by the Internal Revenue Service (IRS) and the U.S. Department of the Treasury. It was introduced under Section 206 of the Stephen Beck, Jr., Achieving a Better Life Experience (ABLE) Act of 2014, which created the statutory Certified Professional Employer Organization (CPEO) program under Internal Revenue Code (IRC) Sections 3511 and 7705.

This form is used by IRS-certified Professional Employer Organizations (CPEOs) and their business clients (customers). It officially notifies the IRS whenever a CPEO enters into, modifies, or terminates a professional employer service contract with a customer. It also formalizes the legal transfer of federal employment tax responsibilities from the client to the certified organization.

Purpose of the Form – Why Does Form 8973 Exist?

Historically, when a business hired a standard payroll service company or non-certified Professional Employer Organization (PEO) to handle payroll, the business owner remained 100 percent legally liable for unpaid payroll taxes if that third-party provider defaulted, committed fraud, or failed to deposit funds with the government.

To provide security for small and mid-sized employers, Congress created the voluntary IRS certification program for PEOs. When an employer signs a qualifying contract with an IRS-certified PEO, the CPEO becomes solely liable under Section 3511 for paying federal employment taxes (such as Social Security, Medicare, and federal unemployment taxes) on behalf of worksite employees. Form 8973 provides the administrative paper trail establishing this relationship with the IRS, ensuring the client receives full statutory protection from payroll tax liabilities.

Who Needs to File This Form?

Form 8973 must be completed and submitted primarily by the Certified Professional Employer Organization (CPEO). Filing is required under the following circumstances:

• Commencement of a Service Contract: The CPEO enters into a new service agreement or statutory CPEO contract with a customer.
• Termination of a Service Contract: The service contract between the CPEO and the customer ends or is transferred to another provider.
• Contract Modifications & Corrections: The parties modify an existing contract (such as altering which federal tax forms the CPEO files) or need to correct information submitted on an earlier Form 8973.

While the CPEO is legally responsible for submitting the form, the customer’s authorized corporate officer must complete and sign Part 5 when reporting the start of a service contract.

Who Is Exempt / Not Required to File?

Not every outsourced payroll arrangement involves Form 8973. You are exempt or not permitted to use this form if:

• Non-Certified PEOs: You contract with a traditional, non-certified Professional Employer Organization. Non-certified PEOs do not have IRS certification and do not use Form 8973.
• Standard Payroll Service Providers: You use a standard payroll software service or reporting agent that files under Form 8655 (Reporting Agent Authorization).
• Section 3504 Authorized Agents: Employers that appointed an agent using Form 2678 (Employer/Payer Appointment of Agent) under Treasury Regulation Section 31.3504-1 do not file Form 8973.
• In-House Payroll Operations: Employers that manage their own internal payroll and remit taxes directly under their own Employer Identification Number (EIN).

When to File Form 8973

Form 8973 is an event-driven compliance document with strict operational deadlines:

• Service Contract Start: The CPEO must generally submit Form 8973 within 30 calendar days of the start date of the service contract. (Newly certified CPEOs are given six months from their certification date to report pre-existing client contracts).
• Service Contract End: When a customer leaves the CPEO, the CPEO must submit Form 8973 within 30 calendar days of the contract termination date. (Customers may also independently file their own Form 8973 to notify the IRS of contract termination, though it is not mandatory).
• Corrections: A corrected form must be filed as soon as an error on a prior filing is identified.

Where and How to File

Form 8973 can be submitted by mail or fax to the IRS CPEO processing unit. It is not filed alongside annual corporate income tax returns.

The completed, signed form should be transmitted to the dedicated IRS address as per instructions for Form 8973 or faxed to the toll-free IRS CPEO fax number. Both the CPEO and the customer should maintain physical and digital copies of the fully executed form, along with delivery tracking confirmations, in their permanent compliance archives.

Step-by-Step Instructions to Fill Form 8973

Form 8973 is divided into five core parts followed by a mandatory tax disclosure consent schedule.

Part 1 – Why Are You Filing This Form?

Indicate whether the filing reports the start of a service contract (entering the effective start date as MM/DD/YYYY), the end of a contract (entering the termination date), or a correction to an earlier filing.

Part-by-Part Line Breakdown

Part & Section	Form Focus	Filing Directions
Part 2 (Lines 1–5)	Customer Information	Enter the customer’s legal name, EIN, business address, and primary contact details. Check the boxes identifying which employment tax returns the CPEO will file (Forms 940, 941, 943, or CT-1) and whether the CPEO reports all or some employee compensation.
Part 3 (Lines 6–9)	CPEO Information	Enter the CPEO’s legal name, trade name (DBA), official CPEO EIN, physical address, and contact details.
Part 4 (Lines 10–13)	Customer Relationship Details	Indicate whether the contract is a formal statutory CPEO contract under Section 7705(e)(2), whether the customer is an employment service provider, whether the customer is a related party, and if special employer exemptions apply.
Part 5	Customer Signature	An authorized officer of the customer business must sign, print their title, and date the form under penalties of perjury, certifying that Parts 1, 2, and 4 are true and complete.
Consent Page	CPEO Consent to Disclosure	The CPEO signs a formal consent under Section 6103 allowing the IRS to disclose confidential employment tax filing information to the customer, ensuring the client can verify tax payments.

Required Documents and Information Needed Before Filling

Before completing Form 8973, compile the following commercial and regulatory records:

• Executed Client Service Agreement: The finalized contract between the customer and the CPEO showing the official effective start date.
• Verified EINs: Official IRS Employer Identification Number assignment notices for both the customer and the CPEO.
• Payroll Tax Scope Documentation: Agreement records specifying exactly which payroll tax filings (Forms 940, 941, 943, CT-1) the CPEO is assuming.
• Corporate Signing Authority: Verification that the individuals executing Parts 5 and the consent page hold legal authority to bind the respective organizations.

Common Mistakes to Avoid

Errors on Form 8973 can compromise tax liability protections or delay IRS processing. Watch out for these frequent mistakes:

• Missing the 30-Day Window: Failing to submit Form 8973 within 30 days of contract commencement. Late filings can jeopardize whether Section 3511 sole-liability rules apply to that calendar quarter.
• Omitting Customer Signatures: Submitting a contract start filing with only the CPEO’s signature. Part 5 requires the customer’s signature; submissions lacking customer signatures are rejected.
• Confusing Non-Certified PEOs with CPEOs: Filing Form 8973 for a PEO that has not received official IRS certification under Section 7705. Only certified organizations can use this form.
• Failing to File on Contract Termination: Forgetting to submit Form 8973 when a client leaves. If the end date is not reported, IRS records will continue to expect aggregate Schedule R filings from the CPEO.
• Inconsistent Tax Return Selection: Checking boxes for Form 940 or 941 in Part 2 that contradict how the CPEO actually reports the customer on Schedule R of its aggregate returns.

Penalties for Non-Filing or Errors

Failing to file Form 8973 properly exposes both the service provider and the customer to significant compliance and financial risks:

• Loss of Certification for the CPEO: Compliance with Form 8973 reporting rules is a mandatory condition for maintaining CPEO status. Systematic failure to file customer agreements can result in IRS suspension or revocation of certification.
• Loss of Customer Tax Protections: If a contract is not properly reported to the IRS, the statutory shield under Section 3511 may be invalidated. If the CPEO fails to remit taxes, the IRS could look to the customer to satisfy unpaid payroll liabilities.
• Schedule R Mismatches: Discrepancies between Form 8973 and the CPEO’s aggregate employment tax returns (Form 941, Schedule R) trigger automated IRS compliance inquiries and processing freezes.

Related Forms and Schedules

Form 8973 operates within a broader network of federal employment tax documents:

• Form 941 (Schedule R): Allocation Schedule for Aggregate Form 941 Filers (where the CPEO lists customer-by-customer wage and tax allocations).
• Form 940 (Schedule R): Allocation Schedule for Aggregate Form 940 Filers (for annual federal unemployment taxes).
• Form 8655: Reporting Agent Authorization (used by standard payroll service companies, not CPEOs).
• Form 2678: Employer/Payer Appointment of Agent.
• Form W-2: Wage and Tax Statement (issued to worksite employees under the CPEO’s EIN).

Frequently Asked Questions

What is the difference between a PEO and a CPEO?

A standard PEO is a private co-employment service provider. A Certified PEO (CPEO) has undergone rigorous IRS background, financial, and bonding checks. Under federal law, contracting with a CPEO legally shifts sole liability for federal employment taxes onto the CPEO, whereas customers of a standard PEO remain jointly liable.

Does the business customer file Form 8973 directly?

Generally, no. The CPEO prepares and submits Form 8973 to the IRS. However, the customer must review and sign Part 5 when a contract starts. A customer is permitted (but not required) to file Form 8973 independently if their contract terminates.

What is a “worksite employee”?

Under IRC Section 7705(e), a worksite employee is an individual who receives remuneration from a CPEO for services performed for a customer at a work location where at least 85 percent of the staff are covered by the CPEO contract.

Can a CPEO report taxes for a customer before Form 8973 is filed?

IRS guidance allows a CPEO to report a customer on Schedule R for tax periods ending prior to the Form 8973 submission deadline, provided Form 8973 is filed within the required 30-day window.

What is the purpose of the Consent to Disclosure on Page 3?

Because federal tax records are confidential under IRC Section 6103, the consent page allows the IRS to disclose confirmation to the customer that the CPEO filed the required employment tax returns and paid the associated taxes.

Can Form 8973 be signed electronically?

Yes. The IRS permits valid electronic signatures on Form 8973 in accordance with IRS electronic signature guidelines, enabling streamlined digital signing between the CPEO and customer.

Conclusion – Key Takeaways Summarized

IRS Form 8973 is the indispensable legal agreement that connects small and mid-sized businesses with Certified Professional Employer Organizations. It provides the IRS with formal notice of co-employment contracts and ensures that employers receive statutory protection against unpaid payroll taxes under IRC Section 3511.

To keep your organization compliant, execute the form within 30 days of beginning or ending a client relationship, verify that all applicable employment tax forms are checked accurately, secure authorized customer signatures, and submit the document promptly to the IRS CPEO processing center.