Payroll Tax in Colorado: Complete Guide 2026
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Payroll Tax in Colorado: Complete Guide 2026
Tax information is for educational purposes only and does not constitute tax advice. Consult a licensed tax professional for your specific situation.
Colorado’s payroll tax landscape has expanded significantly in recent years, driven by the FAMLI Act (Family and Medical Leave Insurance), which introduced mandatory paid family and medical leave premiums for virtually all employers and employees in the state. Combined with a flat state income tax, standard unemployment insurance, and federal FICA obligations, Colorado employers now navigate a payroll system that is more complex than many neighboring Western states.
Colorado Payroll Tax Rates (2026)
| Tax | Rate | Paid By | Wage Base |
|---|---|---|---|
| State Income Tax Withholding | Flat ~4.40% | Employer withholds from employee | All taxable wages |
| State Unemployment Insurance (SUI) | ~0.71% to ~11.84% | Employer | First ~$23,800 per employee |
| FAMLI (Paid Family & Medical Leave) | ~0.90% total | Employer (~0.45%) + Employee (~0.45%) | All wages (no cap) |
| Federal FICA — Social Security | ~6.2% each | Employer + Employee | First ~$168,600 |
| Federal FICA — Medicare | ~1.45% each | Employer + Employee | No cap |
| Additional Medicare (high earners) | ~0.9% | Employee only | Wages over ~$200,000 |
Colorado’s flat income tax rate of ~4.40% applies to all taxable wages with no brackets, making withholding calculations straightforward compared to states with graduated systems.
How Colorado Payroll Tax Works
State Income Tax Withholding
Colorado uses a flat income tax rate of approximately ~4.40%, which applies to all wages after allowable deductions. Because it is a flat rate, employers simply withhold ~4.40% of taxable wages after accounting for withholding allowances. Colorado’s income tax is constitutionally linked to the federal taxable income definition, meaning most federal deductions and adjustments flow through automatically.
FAMLI Act (Paid Family and Medical Leave)
The Colorado FAMLI program, which began collecting premiums in ~2023 and paying benefits in ~2024, provides up to ~12 weeks of paid family and medical leave (with up to ~4 additional weeks for pregnancy or childbirth complications). The total premium rate for ~2026 is projected at approximately ~0.90% of all wages with no wage cap. The cost is split equally between employer and employee at approximately ~0.45% each. Employers with fewer than ~10 employees are not required to pay the employer share but must still withhold and remit the employee portion. The maximum weekly benefit is projected at approximately ~$1,100 per week.
State Unemployment Insurance (SUI)
Colorado employers pay SUI on the first approximately ~$23,800 of each employee’s annual wages. New employers typically receive a standard rate of approximately ~1.70% for their first ~2 to ~3 years. After developing sufficient experience, rates are assigned based on the employer’s reserve ratio, ranging from approximately ~0.71% to ~11.84%. Colorado’s maximum SUI rate is notably high compared to many states, reflecting the state’s aggressive surcharging during periods of high unemployment claims.
Workers’ Compensation
Colorado requires most employers to carry workers’ compensation insurance through private insurers or Pinnacol Assurance (the state’s quasi-public insurer). Premiums vary by industry classification and payroll volume. Rates range from approximately ~$0.15 per ~$100 of payroll for low-risk office work to over ~$20.00 per ~$100 for high-risk occupations.
Comparison to Neighboring States
| Metric | Colorado | Utah | Wyoming | Kansas | National Avg. |
|---|---|---|---|---|---|
| State income tax rate | Flat ~4.40% | Flat ~4.65% | None | ~3.1%—~5.7% | Varies |
| SUI taxable wage base | ~$23,800 | ~$47,000 | ~$30,900 | ~$14,000 | ~$16,000 |
| FAMLI/PFML premium | ~0.90% (shared) | None | None | None | ~0.4% |
| Est. total employer cost per ~$50K employee | ~$5,400 | ~$5,100 | ~$3,200 | ~$4,800 | ~$4,300 |
Colorado’s FAMLI premiums push its total employer cost above most neighboring states, though the benefit of paid leave can reduce costs associated with turnover and unplanned absences.
Tips for Minimizing Payroll Tax Burden
- Leverage the FAMLI small-employer exemption. Employers with fewer than ~10 employees are exempt from the employer share of FAMLI premiums, saving ~0.45% of total payroll.
- Manage SUI experience ratings proactively. Colorado’s maximum SUI rate of ~11.84% is among the highest in the nation. Contest improper unemployment claims and maintain detailed separation records.
- Use the correct withholding method. Colorado’s flat ~4.40% rate simplifies withholding, but ensure you apply the correct withholding allowances to avoid over-collection and employee complaints.
- Review workers’ compensation classifications. Ensure employees are classified in the correct risk category. Misclassification can create significant premium overpayment.
- File and pay on time. Colorado imposes penalties of ~3% to ~10% for late SUI payments and separate penalties for late FAMLI premium remittance.
- Plan for FAMLI leave operationally. Understanding the ~12-week (plus ~4-week) benefit structure helps with workforce planning and managing coverage during employee absences.
- Monitor flat tax rate changes. Colorado voters have repeatedly adjusted the income tax rate through ballot measures. Budget for potential changes in future tax years.
Key Takeaways
- Colorado’s flat state income tax rate of approximately ~4.40% applies to all taxable wages with no brackets
- The FAMLI Act requires ~0.90% of all wages (split ~0.45% employer / ~0.45% employee) for paid family and medical leave, with no wage cap
- SUI rates range from ~0.71% to ~11.84% on the first approximately ~$23,800 of wages, with the maximum rate among the highest nationally
- Employers with fewer than ~10 employees are exempt from the employer share of FAMLI premiums
- FAMLI provides up to ~12 weeks of paid leave (plus ~4 weeks for pregnancy complications), with a projected maximum benefit of approximately ~$1,100 per week
- Estimated total employer cost per ~$50,000 employee is approximately ~$5,400
Next Steps
- See the full state picture at Taxes in Colorado: State Tax Guide 2026
- Compare state tax burdens at State Income Tax Rates Comparison 2026
- Learn about federal payroll obligations in the Self-Employment Tax Guide
- Calculate your federal bracket with the Tax Bracket Calculator 2026
- Get local help: Find a CPA Near You