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Colorado
Employee Obligations (Which Returns YOU Must File)
Since Washington has no income tax, you won't face double taxation. However, if you physically work in Colorado, you may owe Colorado income tax (Flat 4.4%) and need to file a nonresident Colorado return.
Employer Obligations (What Your Employer Must Withhold & Remit)
Register for withholding, unemployment, and FAMLI from day 1. Must withhold the employee FAMLI share. Unemployment applies to the first $30,600. FAMLI employer contribution is 0.44% on wages up to $184,500. Effective January 1, 2026, FAMLI benefit payments are subject to FICA and FUTA for employers with 10 or more employees; FAMLI handles employee-side FICA withholding on benefit payments.
City & Local Income Taxes (Extra Filings Beyond the State Return)
Denver charges a flat $5.75/month Occupational Privilege Tax (not a percentage). Greenwood Village $2/month, Sheridan $3/month, Glendale $5/month. Aurora eliminated its tax in January 2025.
Other Paycheck Deductions (Disability, Paid Leave, Unemployment)
FAMLI 0.44% on wages up to $184,500.
Related guides
More from Washington · Cross-State Work
- Washington → New Mexico
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Moving to Colorado from elsewhere · Cross-State Work
This is general information, not tax or legal advice. Laws change frequently. Always consult a licensed CPA or tax attorney for your specific situation. All information researched as of March 21, 2026.