Why do PEO wages not always match a client’s Form 941 records?

The mismatch may be explained by the payroll arrangement. A certified professional employer organization may file aggregate employment tax returns under the CPEO's EIN and allocate customer amounts through Schedule R. Other third-party payer arrangements can use different filing mechanics.

The preparer should identify the arrangement before treating the mismatch as an error. The business return still needs support for wage deductions, payroll taxes, benefits, and fees, but that support may come from PEO reports and allocation schedules rather than Forms 941 filed under the client's EIN.