California income tax runs 9.3–12.3% on retirement income. Colorado is flat 4.4%. Property tax comparison, cost of living, and the communities California buyers choose most.
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Talk to a Specialist →The California-to-Colorado retirement migration is real and accelerating. The reasons are specific: California’s top income tax rate reaches 13.3%, and even moderate retirement income puts most retirees in the 9.3% bracket. Colorado’s flat 4.4% rate saves $5,000–$20,000/year for most California retirees. Combined with California’s median home price (over $800K statewide), Denver’s $625K average active adult pricing looks like a significant capital event for California sellers.
California taxes all retirement income — Social Security, pensions, 401k withdrawals, IRA distributions — at ordinary income rates. A couple with $150K combined retirement income in California pays approximately $9,500–$13,000 in state income tax per year depending on deductions. The same couple in Colorado pays $150K × 4.4% = $6,600. Annual savings: $2,900–$6,400.
For higher-income California retirees with $200K+ in combined income, the savings are larger: California reaches 10.3–12.3% on that income; Colorado stays flat at 4.4%. The gap at $250K income is approximately $14,000–$19,000/year.
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California’s Proposition 13 caps annual property tax increases at 2% for existing homeowners. This means long-term California homeowners pay artificially low taxes on appreciated properties. A $1.2M California home purchased 20 years ago for $400K pays taxes on the 2% annual growth from $400K — not on the $1.2M current value.
When that homeowner sells and buys in Colorado, they lose the Prop 13 protection and pay the full Colorado rate on the new purchase price. The reset can be a shock: from $3,000/year in California (Prop 13 protected) to $3,500–$4,000/year in Colorado (Douglas County, full assessment). However, for most California sellers, the capital freed by the sale more than compensates.
California 55+ buyers in Denver tend to gravitate toward communities with the quality and finish level they are accustomed to at home: Regency at Montaine (Toll Brothers quality), Solstice (Shea Homes, luxury tier), and Anthem Ranch (established, resort-scale) consistently appear in top searches from California zip codes. The Castle Rock and Highlands Ranch corridors — Douglas County — particularly appeal to California buyers accustomed to planned community infrastructure.
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