Colorado payroll taxes: Your 2026 guide to staying compliant

Colorado's economy is known for its strong focus on technology, aerospace, biosciences, and outdoor recreation. The state's stunning natural landscapes and robust economic development initiatives make it an attractive place for businesses and talent alike. In the first quarter of 2025, new business entity filings in Colorado increased by 7.7% year-over-year, showcasing a healthy entrepreneurial spirit within the state, according to the Colorado Secretary of State’s Quarterly Business & Economic Indicators. As businesses thrive in this dynamic environment, understanding payroll taxes becomes crucial for smooth operations. These taxes play a vital role in funding essential state and federal programs, and proper management ensures compliance and avoids penalties.

This guide will walk you through the specifics of Colorado's payroll taxes, helping you navigate the requirements and responsibilities.

Jump to:

• What are payroll taxes?
• Understanding Colorado state payroll taxes
• Other important tax considerations
• Employer responsibilities for payroll taxes in Colorado
• Filing payroll tax returns in Colorado
• Common payroll tax mistakes in Colorado (and how to avoid them)
• How to manage your small business payroll obligations
• Leverage payroll software for compliance in Colorado

What are payroll taxes?

Payroll taxes are taxes based on wages, salaries, or other compensation that both employers and employees must pay. While income taxes are also withheld through payroll, payroll taxes specifically fund programs like Social Security, Medicare, and unemployment insurance.

Understanding Colorado state payroll taxes

When starting a business in Colorado, you need to understand both federal and state payroll taxes to ensure compliance.

Federal payroll taxes

Payroll taxes are mandatory and encompass both federal and state requirements.

Federal payroll taxes include:

• Federal income tax: This is withheld from each employee's paycheck based on their W-4 form and the current IRS tax brackets. You'll be responsible for calculating the correct amount, withholding it, and then sending it to the IRS.
• Social Security and Medicare taxes: Both of these taxes have a portion paid by the employee and a matching portion paid by you, the employer. For Social Security, the combined rate is 12.4% on the first $176,100 of wages in 2025. For Medicare, it's 2.9% on all wages, with an extra 0.9% for higher earners. You'll withhold the employee's portion and match it.
• Federal Unemployment Tax (FUTA): This is paid solely by you at a rate of 6% on the first $7,000 of each employee's wages. However, most employers get a 5.4% credit, reducing the rate to 0.6%. The graphic below lists some best practices for managing your FUTA obligations.

Colorado state payroll taxes

In addition to federal payroll taxes, Colorado employers must account for state-specific payroll taxes. These include:

• Colorado State Income Tax: Colorado applies a flat income tax rate of 4.40%. Employers withhold this tax from employee wages based on federal Form W-4 and, if applicable, Colorado Form DR 0004, Colorado Employee Withholding Certificate.
• State Unemployment Insurance (SUI): Employers pay Colorado's SUI taxes. The taxable wage base for UI in Colorado for 2025 is $27,200. Tax rates vary based on an employer's experience rating, with new employers assigned a standard rate based on their industry classification for the first three years. These rates include a standard premium rate, a support surcharge rate, and a solvency surcharge.
• Family and Medical Leave Insurance (FAMLI): Colorado’s FAMLI program is funded by premiums paid by both employers and employees. The 2025 rate for FAMLI remains at 0.9% of wages, with 0.45% paid by the employer and 0.45% paid by the employee. Employers may choose to pay the full 0.9% as an added employee benefit. FAMLI benefits are generally not subject to Colorado state income tax.

Colorado local payroll taxes

There are generally no local payroll taxes to withhold in Colorado. However, some cities, including Denver, impose an Occupational Privilege Tax (OPT), a flat monthly tax paid by both employees and employers when wage thresholds are met.

• Check with your local government in your specific area to confirm whether OPT or other unique tax requirements apply.
• Consult a tax professional if you're unsure about tax obligations. Choosing an accountant specializing in Colorado taxes can help you do this.

Other important tax considerations

Multiple locations

If your business has employees working in different Colorado cities, you may be subject to local taxes like the Occupational Privilege Tax (OPT) in each location. Requirements vary by city, so it’s important to review local rules based on where your employees perform their work.

Changing rates

Payroll tax rates can change over time, so it's important to stay informed about any updates that may affect your business.

Employer responsibilities for payroll taxes in Colorado

As a Colorado employer, you're responsible for managing a complex array of federal and state payroll taxes, which involves careful calculation, timely withholding, and accurate reporting to various government agencies. Here’s an overview of what you should know.

Registering for payroll taxes

To comply with Colorado payroll tax requirements, employers must register with the appropriate state agencies. This typically involves several steps:

1. Colorado Wage Withholding Account: Every employer paying wages for services performed in Colorado must apply for and maintain an active Colorado Wage Withholding account. You can apply online via MyBizColorado or by submitting a paper Form CR 0100, Colorado Sales Tax and Withholding Account Application, available from the Colorado Department of Revenue (CDOR).
2. State Unemployment Insurance (SUI): Employers must register with the Colorado Department of Labor and Employment (CDLE) for unemployment insurance. This is done through the MyUI Employer+ system. Step-by-step instructions for registration are available on the CDLE website.
3. Paid Family and Medical Leave Insurance (FAMLI): Businesses need to register for a My FAMLI+ Employer account to manage their responsibilities under the FAMLI program. This portal allows employers to report wage data and remit premium payments.

Calculating payroll taxes

Once you've registered, the next step is accurately calculating payroll taxes.

• Check government websites: Colorado's Department of Revenue provides resources and publications, such as the Colorado Withholding Worksheet for Employers (Form DR 1098), to help businesses calculate state income tax withholding. The Colorado Department of Labor and Employment (CDLE) publishes updated information on SUI rates and the taxable wage base. The FAMLI Division provides guidance on FAMLI premium calculations.
• Payroll software: Some small business software payroll programs have built-in Colorado tax tables that automate calculations, saving you time and minimizing the chance for errors.
• Professional services: If you prefer to outsource payroll, a professional payroll service can handle everything for you.

Whichever method you choose, make sure you stay updated on the current tax rates and wage limits, as these can change every year.

Withholding state payroll taxes

Once you've calculated the correct amounts, you'll need to withhold these taxes from your employee’s wages and remit them to the appropriate authorities. Follow Colorado’s guidelines for withholding and remittance timelines to avoid penalties.

Colorado State Income Tax: Employers are required to withhold Colorado income tax from employee wages. For 2025, the flat income tax rate is 4.4%. ​

• *Example: An employee earns $1,000 in gross wages. The employer would withhold $44.00 ($1,000 x 0.044) for Colorado state income tax.*

Paid Family and Medical Leave (FAMLI): For 2025, the FAMLI premium rate is 0.9% of an employee's wages. Half of this (0.45%) is the employee's responsibility and is withheld from their wages. ​

• *Example: An employee earns $1,000 in gross wages. The employer would withhold $4.50 ($1,000 x 0.0045) for the employee's portion of FAMLI.*

By applying these calculations to each paycheck, you ensure accurate withholdings and compliance with state requirements.

Remitting state payroll taxes

Businesses need to file payroll taxes with the state agencies based on their assigned filing frequency (weekly, monthly, or quarterly) for withholding tax, and quarterly for SUI and FAMLI.

Filing payroll tax returns in Colorado

In Colorado, employers must comply with quarterly and annual payroll tax return requirements to meet state and federal obligations. Here's a breakdown of 2025 state-level requirements:

Quarterly and monthly requirements