Ceridian Tax Service Client ID Structure

Upon receipt of a complete and timely Start-Up Kit, the Conversions Department creates a Client Master File ( CMF Client Master File ) for the customer based on the information received. The first step in creating the CMF is the systematic assignment of an identification number for the customer.

The Client ID consists of seven (7) characters. The first five (5)
represent the Tax Service Client ID. One Client ID is assigned per
FEIN
Federal Employer Identification Number . The last two (2) characters represent client divisions. Divisions are created to correspond with a customer's payroll structure. A customer may cluster or segregate his payroll processing based on
his company's needs. Separate groupings may be created for one of
the following reasons:

Typically, each grouping is assigned a unique payroll identification
number and is, therefore, assigned a unique division number on the Tax Service system in order to complement the payroll structure.