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Colorado State Tax, Colorado Unemployment and Payroll Tax |

Looking for Colorado state tax information? We provide the latest resources on state tax, unemployment, income tax and more.

Colorado Department of Revenue

Colorado Department of Labor and Employment

Withholding Requirements:

  • Register as employer by filing online with Colorado Business Express online
  • Employee Withholding Allowance Certificate, Federal W-4
  • Withholding Method = Formula
  • Supplemental Rate = Withhold at 4.63%

Local Taxes:

For a complete list of Colorado city taxes please here.

State Unemployment Insurance (SUI):

Report Quarterly wages and contributions by filing Form UITR-a(a) (Unemployment Insurance Report of Worker Wages) and Form UITR-1 (Unemployment Insurance Tax Report) by last day of month following end of quarter or file online by clicking here

Wage Base is $11,800 for 2015 and $12,200 for 2016 Rates Range from 2.13% to 9.67%

New non-construction employers use 1.7% Base Rate plus 0.43% Bond Principal Rate for a Combined Rate of 2.13% for 2015

General construction employers use 5.06% Base Rate plus 1.28% Bond Principal Rate for a Combined Rate of 6.34% for 2015.

Heavy construction employers use 7.72% Base Rate plus 1.95% Bond Principal Rate for a Combined Rate of 9.67% for 2015.

Trade employers use 5.06% Base Rate plus 1.28% Bond Principal Rate for a Combined Rate of 6.34% for 2015.

State Disability Insurance (SDI):


State Labor Laws:

Minimum wage - $8.23 per hour effective 2015, $8.31 per hour effective 2016.
Termination Pay - If fired pay at once. If employee quits, pay by the next regular payday.

New Hire Reporting:

Colorado State Directory of New Hires

P.O. Box 2920
Denver, CO 80201-2920
Fax: 303-297-2595

To report online click here

Remit Withholding for Child Support to:

The Family Support Registry
PO Box 2171
Denver, Colorado 80201-2171

Phone: 303-299-9123

Reciprocal States:


To see a Colorado paycheck calculation, visit the Salary Paycheck Calculator at PaycheckCity. is a free online resource featuring a compilation of research, collaboration and web tools for use by payroll professionals and more including information about Colorado state tax, articles, federal tax information and state tax information.

TAX TIDBIT... To correctly calculate withholding near wage base limits, enter your Gross Salary Year-to-date. It's important for an accurate calculation and is usually found on your last pay stub.