Colorado Workers' Comp Rate Calculator
Calculate your workers' compensation costs in Colorado. Compare direct carrier vs PEO rates by industry. All calculations use real NCCI class code data and Colorado regulatory filings.
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- Annual Premium = (Annual Payroll / 100) × Base WC Rate × Experience Modification Rate (EMR)
- PEO Premium = (Annual Payroll / 100) × PEO Pooled Rate × PEO Pooled EMR Factor
- EMR Projection: Based on NCCI split-point formula. Claims history impacts future EMR over a 3-year rolling window.
- PEO Discount: PEO rates use a discount factor of 0.52 applied to direct market rates, reflecting pooled buying power.
- 3-Year Trend: Direct carrier premiums trend at +3%/year (10-year average). PEO premiums trend at +2%/year due to scale.
- Safety Credit: A 5% premium credit is applied when a formal safety program is in place.
Disclaimer: This calculator provides estimates for educational purposes. Actual premiums depend on your specific underwriting, claims history, and carrier selection. Data sources: NCCI, Colorado Division of Workers' Compensation, NAPEO, BLS. Calibrated to 2026 market conditions.
Workers' comp in Colorado: how the system works
In Colorado, workers' comp is sold on the competitive private market, with rates built on loss costs filed by NCCI, the national rating bureau most states use. Carriers then apply their own multipliers on top, so comparing carriers genuinely matters for your premium.
For roofers and construction employers, the class code drives the rate more than anything else: roof work carries some of the highest workers' comp rates of any trade because of fall exposure. Wherever you operate, the experience modification rate is the biggest lever you control, and a cleaner claims history compounds into lower premiums year over year.
Colorado workers' comp at a glance:
- Market: Competitive market, NCCI-rated
- Rate authority: NCCI, the national rating bureau most states use
- Highest-rate trade: roof work and construction class codes
- Your biggest lever: the experience modification rate
Official source: NCCI, the national rating bureau most states use.
Model your own numbers with the EMR Scenario Modeler, then see how lower comp cost frees budget for benefits in the Benefits ROI Calculator.
Frequently asked questions
Who sets workers' comp rates in Colorado?
Rates are built on loss costs filed by NCCI, the national rating bureau most states use, with each carrier applying its own multiplier, which is why premiums vary between carriers.
Is workers' comp required in Colorado?
Most Colorado employers are required to carry workers' comp, though small-employer thresholds vary by state. Confirm the exact requirement for your business with your state workers' comp agency.