Median rent is 13% lower in St. Louis ($997/mo vs $1,145/mo). Buying is cheaper in St. Louis, where the median home runs $197,500 versus $266,200. Households earn more in Tucson ($57,073 vs $56,160 a year). Taken together, Tucson is the more affordable choice with a cost index of 89.9 against 95.0 — about 5% lower overall prices. After adjusting income for local prices, a typical paycheck stretches further in Tucson, AZ.
Cost of living verdict
Tucson is 5% cheaper overall
Cost of Living Index: 89.9 in Tucson vs 95.0 in St. Louis (US national average = 100)
City A
St. Louis, MO
City B
Tucson, AZ
How much would you need to earn in Tucson, AZ to maintain your standard of living from St. Louis, MO?
Equivalent salary in Tucson, AZ
$70,990
You could earn $4,010 less (5% lower) and break even.
Based on BEA Regional Price Parity (cost index) for each metro area. This estimates overall purchasing power; it does not account for taxes or take-home pay differences.
Metric
St. Louis
Missouri
Tucson
Arizona
Population
Median Household Income
Annual
Median Gross Rent
Per month
Median Home Value
Cost of Living Index
US avg = 100
1BR Fair Market Rent
HUD FMR
2BR Fair Market Rent
HUD FMR
3BR Fair Market Rent
HUD FMR
Air Quality Index
Lower = cleaner
Top State Income Tax
Top marginal rate
State Sales Tax
Statewide base rate
Median Age
Years
✓ = better value · Sources: Census ACS, BEA, HUD Fair Market Rents, EPA AirNow, Tax Foundation
Median rent is modestly lower in St. Louis at $997/mo compared to $1,145/mo in Tucson (13% gap). Home buyers face a steeper market in Tucson: the median home is $266,200 versus $197,500 in St. Louis — 26% more expensive.
1BR Fair Market Rent
2BR Fair Market Rent
BLS OEWS 2023 — metro-level data
State tax data is not yet available for these cities.
St. Louis
Income tax: N/A
Sales tax: N/A
Tucson
Income tax: N/A
Sales tax: N/A
Tucson has cleaner air on average: 26.0 AQI (Good) compared to 33.0 AQI (Good) in the other city. Lower AQI means cleaner, healthier air.
Pick Tucson if you prioritize lower overall cost of living (index 89.9 vs 95.0).
Pick St. Louis if you prioritize cheaper rent ($997/mo median).
Pick Tucson if you prioritize cleaner air quality (avg AQI 26.0).
Is St. Louis cheaper than Tucson?
Tucson is cheaper overall, with a cost of living index of 89.9 versus 95.0 (US average = 100). That means prices run about 5% lower in Tucson.
How much is rent in St. Louis vs Tucson?
Median rent is $997/mo in St. Louis, MO and $1,145/mo in Tucson, AZ. St. Louis, MO has the lower rent by about 13%.
Which has higher salaries — St. Louis or Tucson?
Median household income is $56,160 in St. Louis, MO and $57,073 in Tucson, AZ. Tucson, AZ has the higher median income. Note that BLS occupational wages in the table above show wages for specific jobs.
Which city has better air quality?
Tucson, AZ has better air quality on average: 26.0 AQI versus 33.0 AQI. Both are EPA AirNow annual averages; lower is better.
Which has lower taxes — St. Louis or Tucson?
State tax data is not yet available for one or both cities.
What salary do I need in Tucson to match my St. Louis income?
To maintain the same purchasing power, a salary of $100,000 in St. Louis, MO is equivalent to roughly $94,653 in Tucson, AZ (using the BEA Regional Price Parity ratio). Use the salary calculator above for any income amount.
Data last updated: December 1, 2026 · Sources: US Census ACS, BEA RPP, BLS OEWS, HUD FMR, EPA AirNow, Tax Foundation · Methodology
