The Single Biggest Financial Argument for Moving to Denver
Illinois has an effective property tax rate of approximately 2.0–2.3%, consistently ranking in the top 3 highest rates in the country. Colorado's effective rate is approximately 0.5–0.6%. That's a 3.5–4x difference that compounds dramatically at Denver's home price levels.
The Dollar Difference on Real Purchases
| Home Value | Annual Taxes (IL) | Annual Taxes (CO) | Annual Savings | Monthly Savings |
|---|---|---|---|---|
| $400,000 | $8,000–$9,200 | $2,000–$2,400 | $5,600–$6,800 | $467–$567 |
| $600,000 | $12,000–$13,800 | $3,000–$3,600 | $8,400–$10,200 | $700–$850 |
| $800,000 | $16,000–$18,400 | $4,000–$4,800 | $12,000–$13,600 | $1,000–$1,133 |
| $1,200,000 | $24,000–$27,600 | $6,000–$7,200 | $18,000–$20,400 | $1,500–$1,700 |
How Colorado Property Taxes Work
Colorado uses an assessment rate system. Residential properties are assessed at 6.765% of actual value. Denver County's total mill levy is approximately 74–79 mills. On a $600,000 home: assessed value $40,590 × 0.076 mill rate = approximately $3,085/year.
Are there other Colorado taxes I should factor in?
Colorado has no estate tax. Income tax is 4.4% flat vs Illinois at 4.95%. Sales tax in Denver runs approximately 8.81% combined vs Chicago's approximately 10.25%. The overall tax picture tilts toward Colorado across almost every category.
Does Colorado have a homestead exemption?
Yes — for homeowners 65+ who have owned and occupied their primary residence for 10+ years, Colorado exempts 50% of the first $200,000 of actual value from taxation. Meaningful for retirement and pre-retirement buyers.
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