Quick answer
Idaho has lower average 1BR rent ($1,380/mo vs $1,680/mo). State income tax: Colorado (4.4%) vs Idaho (5.8%) — on a $120K salary that's $1,680/year difference.
State Comparison · 2026
Colorado vs Idaho
Side-by-side on state income tax, rent, home prices, climate, and top metros — with specific dollar numbers for every claim.
Last updated: April 23, 2026
Colorado vs Idaho at a Glance
| Metric | Colorado | Idaho |
|---|---|---|
| Avg 1BR rent (major metros) | $1,680 | $1,380 ✓ |
| Avg median home price | $743K | $445K ✓ |
| Cheapest city | Colorado Springs ($1,450) | Boise ($1,380) ✓ |
| Priciest city | Boulder ($1,850) | Boise ($1,380) |
| State income tax | 4.4% ✓ | 5.8% |
| Avg walkability | 57/100 ✓ | 42/100 |
| Cities tracked | 3 | 1 |
✓ marks the lower or more favorable value. Averages use the major metros we track in each state.
State Income Tax: Real Savings
What the rate gap actually looks like in your paycheck. Lower rate: Colorado (4.4%).
Salary $80K
$1,120
/year saved in Colorado
Salary $120K
$1,680
/year saved in Colorado
Salary $200K
$2,800
/year saved in Colorado
Calculation uses the effective state rate difference × gross salary. Doesn't include property tax, sales tax, or federal impact.
Deep Dive: Each State
Colorado (CO)
Tax reality
Colorado has a flat 4.4% state income tax — lower than California or New York but not zero. The TABOR amendment caps annual state revenue growth, which occasionally triggers tax refunds (a few hundred dollars per taxpayer) but also starves state services. Property tax is low (~0.5% effective).
Top cities (3 tracked)
Top drawbacks
- ✕Altitude takes 3-6 weeks to adjust to and permanently affects endurance sports performance vs sea level. Some people never fully adjust.
- ✕Winter driving the I-70 corridor to ski resorts is regularly miserable. Traction laws can close passes entirely, and Friday/Sunday traffic in season is 3-5 hour crawls for a 90-minute drive.
- ✕Water is structurally tight. Denver specifically has growing supply concerns as the population expands and Colorado River allocations contract. Homes with big lawns are increasingly a liability.
Idaho (ID)
Tax reality
Idaho has a 5.8% flat state income tax (moderate). Property tax is low (~0.6% effective). Sales tax 6%. No estate tax. Overall moderate tax burden.
Top cities (1 tracked)
Top drawbacks
- ✕Housing growth has outpaced wage growth. Long-time Idaho residents have been priced out of Boise proper.
- ✕Summer wildfire smoke affects air quality regularly — July through September can have multiple weeks of AQI 150-200+.
- ✕Idaho is deeply conservative politically, with some policy shifts (abortion, LGBTQ+, religion in schools) recently tightening. Boise specifically leans moderate; the rest of the state is more conservative.
Frequently Asked Questions
Is Colorado or Idaho cheaper to live in?
Idaho has lower average 1BR rent across major metros — $1,380/mo vs $1,680/mo in Colorado, a $300/mo difference. Home prices: Idaho median is $445K vs $743K.
Colorado vs Idaho: which has lower state income tax?
Colorado has lower state income tax (4.4%) vs 5.8% in Idaho. On an $80K salary that's $1,120/year in savings. On $200K, savings grow to $2,800/year.
Should I move from Colorado to Idaho?
Colorado has a flat 4.4% state income tax — lower than California or New York but not zero. The TABOR amendment caps annual state revenue growth, which occasionally triggers tax refunds (a few hundred dollars per taxpayer) but also starves state services. Property tax is low (~0.5% effective).
What are the best cities in Colorado vs Idaho?
Colorado's largest metros include Denver, Colorado Springs, Boulder. Idaho's largest metros include Boise. Cost of living varies significantly within each state — a Colorado suburb can be 40% cheaper than its flagship city, and vice versa.