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HEAD-TO-HEAD TAX COMPARISON · 2026

COUNTRY A Colorado VS COUNTRY B Arizona

Side-by-side analysis of income tax, effective rates, and take-home pay for Colorado and Arizona in 2026.

Daniel · CountryTaxCalc Updated May 2026 Tax Comparison 2026
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OVERVIEW
Colorado has a flat 4.4% income tax rate (TABOR protected), while Arizona charges a flat 2.5% rate (lowest income tax state in America). Living in Arizona saves $1,900/year on $100k income compared to Colorado. Property taxes are now essentially tied between the two states (CO 0.49% vs AZ's 0.48%), and Colorado has slightly lower sales tax (7.77% vs 8.37%). Overall, Arizona offers better tax advantages for high earners on income tax, while Colorado's edge is mainly its four-season lifestyle rather than property tax. The Denver-Phoenix corridor sees significant bidirectional migration.
Section 01

The Big Picture

Top-line rates and effective take-home for a typical earner — including income tax, social contributions, and applicable surcharges.

🏔️
COUNTRY A
Colorado
TAX RATE
4.4%
Flat Rate

Flat 4.4% (TABOR protected)

🌵
COUNTRY B
Arizona
TAX RATE
2.5%
Flat Rate

Flat 2.5% (lowest income tax state)

TYPICAL ANNUAL DIFFERENCE
Moving from Arizona → Colorado at $100,000
$1,900

That's $158/month back in your pocket

Section 02

Tax Savings by Income Level

Net take-home after all income tax, social contributions, and surcharges — for a single employee with no dependents.

GROSS INCOME
🏔️ CO TAX
🌵 AZ TAX
SAVINGS
10-YEAR
$50,000
$2,200
$1,250
$950
$9,500
$100,000
$4,400
$2,500
$1,900
$19,000
$200,000
$8,800
$5,000
$3,800
$38,000
$500,000
$22,000
$12,500
$9,500
$95,000
💡

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🏔️

Colorado Pros & Cons

+ PROS
  • Property tax essentially tied with Arizona: 0.49% (vs AZ 0.48%) — no longer a meaningful cost advantage either way
  • Four seasons: Fall foliage, skiing, mild summers (vs AZ extreme heat)
  • Better schools: CO ranks #17 vs AZ #40 in K-12 education
  • Outdoor recreation: World-class skiing, hiking, 14ers (Rocky Mountains)
  • Quality of life: Denver consistently ranks top 10 US cities
− CONS
  • Higher income tax: 4.4% flat (vs AZ 2.5%) costs $1,900 on $100k
  • Expensive housing: Denver median $600k (vs Phoenix $470k, 22% cheaper)
  • Harsh winters: Snow, cold (vs Phoenix mild winters)
  • High cost of living: Overall 18% more expensive than AZ
  • Traffic: I-25 congestion, limited transit outside downtown
🌵

Arizona Pros & Cons

+ PROS
  • Lowest income tax: 2.5% flat saves $1,900 on $100k, $9,500 on $500k
  • Lower housing: Phoenix median $470k (vs Denver $600k, 22% cheaper)
  • Lower cost of living: 18% cheaper than Colorado overall
  • Mild winters: 70°F sunny (vs CO snow/cold)
  • Huge job market: Phoenix 5M metro (vs Denver 3M)
− CONS
  • Property tax essentially tied with Colorado: 0.48% (vs CO 0.49%) — not a meaningfully higher cost
  • Higher sales tax: 8.37% (vs CO 7.77%) costs $60 more/year
  • Extreme heat: 110°F+ summers (vs CO mild 85°F)
  • No seasons: Desert year-round (vs CO four seasons)
  • Limited outdoor recreation: Desert vs CO mountains
FAQ

Frequently Asked Questions

How much will I save moving from Colorado to Arizona?

On $100,000 income, Arizona saves $1,900/year in income tax (AZ 2.5% vs CO 4.4%). AZ also has cheaper housing (Phoenix 22% cheaper than Denver). Property tax is now essentially a wash (AZ 0.48% vs CO 0.49%). On a $500k home, AZ pays $2,400/year vs CO $2,450/year—AZ is actually about $50/year cheaper. Net savings: roughly $1,950/year. Over 10 years: ~$19,500. Plus 18% lower cost of living in Phoenix.

Why does Arizona have such low income tax (2.5% flat)?

2021 tax reform flattened AZ's progressive system to 2.5% flat rate (fully implemented by 2023). Goal: compete with Texas/Florida/Nevada for migration. Now AZ has lowest income tax of any state WITH income tax. Combined with low property tax (0.48%) and no extreme weather premiums, AZ is extremely competitive. Colorado's 4.4% is TABOR-protected (constitutional limit), can't easily change.

Is there significant Colorado-Arizona migration?

Yes, heavy bidirectional flow. In 2023, 18,472 people moved CO → AZ and 14,204 moved AZ → CO (net: AZ gained 4,268). Migration drivers CO → AZ: lower taxes (~$1,950/year savings), lower cost of living (18% cheaper), mild winters, retirees escaping snow. Migration drivers AZ → CO: four seasons, skiing, better schools, quality of life, escaping extreme heat.

Which state is better for remote workers?

Colorado wins for quality of life: four seasons, skiing, outdoor recreation, better schools (#17 vs #40), Denver tech culture. Arizona wins for: lower taxes ($1,900/year savings at $100k), lower cost of living (18% cheaper), mild winters, no snow. Both have strong tech scenes. Choose CO for lifestyle/outdoors. Choose AZ for tax savings/affordability.
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