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Child Support Services
Illinois Child Support

Text File Layout

We use the format that resembles the Federal W-4 form in order to offer uniformity in reporting new hires. Use the table below as a guide to create a file for upload. Download this text file to see an example. (This file layout should not be used for sFTP reporting, Please call (888)-245-1938 for the sFTP file layout.)

ASCII Text File Format
Field Location Length R = Required
or
O = Optional
Format Comment
Record Identifier 1-2 2 R Space fill Constant value always "W4"
Employee's SSN 3-11 9 R Digits No hyphens
Employee's First Name 12-27 16 R Space fill  
Employee's Middle Name 28-43 16 O Space fill  
Employee's Last Name 44-73 30 R Space fill  
Employee's Address Line 1 74-113 40 R Space fill  
Employee's Address Line 2 114-153 40 O Space fill  
Employee's Address Line 3 154-193 40 O Space fill  
Employee's City 194-218 25 R Space fill  
Employee's State 219-220 2 R Two char State's 2 character abbreviation
Employee's ZIP 221-225 5 R Digits  
Employee's ZIP+4 226-229 4 O Digits, Space fill  
Blank 230-270 41 N/A Space fill Not used in Illinos
Employment Status 271-271 1 O Digits, Space fill 1 = Full-time,
2 = Part-time,
3 = Seasonal,
4 = Contractual,
6 = Self-employed
Employee's Date of Birth 272-279 8 O YYYYMMDD Accepted age: 12-120
Employee's Hire Date 280-287 8 R YYYYMMDD Accepted: Within 6 months of current date
Employee's Work State 288-289 2 O Two char State's 2 character abbreviation
Employer's FEIN 290-298 9 R Digits No hyphen
Blank 299-310 12 N/A Space fill Not used in Illinos
Blank 311-511 201 N/A Space fill Not used by HFS' New Hire system
Blank 512-553 42 N/A Space fill Not used in Illinois 
Blank

554-709

156 N/A Space fill Not used by HFS' New Hire system
Blank 710-751 42 N/A Space fill Not used in Illinois
Filler 752-801 50 N/A Space fill