Quick answer
Arizona has lower average 1BR rent ($1,365/mo vs $1,850/mo). State income tax: Arizona (2.5%) vs Illinois (4.95%) — on a $120K salary that's $2,940/year difference.
State Comparison · 2026
Arizona vs Illinois
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
Arizona vs Illinois at a Glance
| Metric | Arizona | Illinois |
|---|---|---|
| Avg 1BR rent (major metros) | $1,365 ✓ | $1,850 |
| Avg median home price | $461K | $340K ✓ |
| Cheapest city | Tucson ($1,080) ✓ | Chicago ($1,850) |
| Priciest city | Scottsdale ($1,550) | Chicago ($1,850) |
| State income tax | 2.5% ✓ | 4.95% |
| Avg walkability | 55/100 | 78/100 ✓ |
| Cities tracked | 4 | 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: Arizona (2.5%).
Salary $80K
$1,960
/year saved in Arizona
Salary $120K
$2,940
/year saved in Arizona
Salary $200K
$4,900
/year saved in Arizona
Calculation uses the effective state rate difference × gross salary. Doesn't include property tax, sales tax, or federal impact.
Deep Dive: Each State
Arizona (AZ)
Tax reality
Arizona switched to a 2.5% flat state income tax in 2023 — one of the lowest in the US. No tax on Social Security. Property tax is moderate (~0.6% effective). The tax picture is genuinely favorable for retirees and moderate earners.
Top cities (4 tracked)
Top drawbacks
- ✕Summer heat is genuinely extreme. 110°F+ days are common June-September, and 2023 saw Phoenix hit 119°F. Outdoor life basically stops — you exercise at 5am or not at all.
- ✕Electricity bills in summer are shocking — AC running 24/7 can push monthly bills to $400-$600 in detached homes. New builds with better insulation help.
- ✕Water security is a long-term question mark. Colorado River allocations are being reduced, and the state has groundwater commitments exceeding sustainable withdrawal. Urban water supply is fine now; long-term planning is uncertain.
Illinois (IL)
Tax reality
Illinois has a flat 4.95% state income tax (moderate) — but property taxes are among the highest in the US, averaging 2.1% effective. On a $350K Chicago home that's $7,400/year. Combined tax burden is higher than it looks. The state's pension underfunding creates long-term fiscal risk for homeowners.
Top cities (1 tracked)
Top drawbacks
- ✕Property tax is brutal — Cook County averages 2.3% effective. On a $500K home, that's $11,500/year. Homeowners feel this every month.
- ✕Chicago winters are genuinely cold. Lake-effect snow, mid-December through March subzero streaks, and winds off Lake Michigan can make it feel -20°F. This is the biggest filter for people considering moving here.
- ✕The state fiscal situation (pension debt, budget pressures) drives ongoing policy uncertainty — property tax, sales tax, and various fees continue to drift upward.
Frequently Asked Questions
Is Arizona or Illinois cheaper to live in?
Arizona has lower average 1BR rent across major metros — $1,365/mo vs $1,850/mo in Illinois, a $485/mo difference. Home prices: Illinois median is $340K vs $461K.
Arizona vs Illinois: which has lower state income tax?
Arizona has lower state income tax (2.5%) vs 4.95% in Illinois. On an $80K salary that's $1,960/year in savings. On $200K, savings grow to $4,900/year.
Should I move from Arizona to Illinois?
Arizona switched to a 2.5% flat state income tax in 2023 — one of the lowest in the US. No tax on Social Security. Property tax is moderate (~0.6% effective). The tax picture is genuinely favorable for retirees and moderate earners.
What are the best cities in Arizona vs Illinois?
Arizona's largest metros include Phoenix, Tucson, Scottsdale. Illinois's largest metros include Chicago. Cost of living varies significantly within each state — a Arizona suburb can be 40% cheaper than its flagship city, and vice versa.