Kansas Payroll Tax and Registration Guide

Account Number(s) Needed:

Companies who pay employees in Kansas must register with the KS Department of Revenue for a Withholding Account Number and the KS Department of Labor for an Employer Serial Number.
KS Withholding Account Number: 0036-099999999F01 or 999-099999999Z99 (4/3 digits; 9 digits; 1 letter; 2 digits)
  • Apply online at the DOR's Customer Service Center to receive a Withholding Account Number within 48 hours of completing the application.
  • Find an existing Withholding Account Number:
    • on Form KW-5, Withholding Tax Deposit Report, or
    • by contacting the DOR
KS Employer Serial Number: 999999 or 9999999 (6 or 7 digits)
  • Apply online at the DOL's KansasEmployer portal to receive an Employer Serial Number within 2 days of completing the application.
  • Find an existing Employer Serial Number:
    • on Form K-CNS 100, Quarterly Wage Report and Unemployment Tax Return, or
    • by contacting the DOL

Required Payroll Documentation:

Withholding 

  • KW-5 (Kansas Withholding Tax Deposit Report): Returns can be filed electronically. This report is a good source of information to balance state tax withheld amounts from previous quarters. 

Unemployment

  • K-CNS 100 (Quarterly Wage Report and Unemployment Tax Return): This return can be filed electronically. This return is a good source of information to use to balance employee gross wages paid and employer contributions made in prior quarters.

Third Party Access /POA Needed:

  • No

Local Income Taxes Imposed:  

  • No

State Resources:

Visit state resources for specific tax rates and wage details



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