Median rent is 32% lower in Phoenix ($1,582/mo vs $2,313/mo). Buying is cheaper in Phoenix, where the median home runs $420,700 versus $906,700. Households earn more in San Diego ($108,077 vs $81,332 a year). Taken together, Phoenix is the more affordable choice with a cost index of 104.7 against 110.7 — about 5% lower overall prices. After adjusting income for local prices, a typical paycheck stretches further in San Diego, CA.
Cost of living verdict
Phoenix is 5% cheaper overall
Cost of Living Index: 104.7 in Phoenix vs 110.7 in San Diego (US national average = 100)
City A
Phoenix, AZ
City B
San Diego, CA
How much would you need to earn in San Diego, CA to maintain your standard of living from Phoenix, AZ?
Equivalent salary in San Diego, CA
$79,346
You'd need $4,346 more (6% higher).
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
Phoenix
Arizona
San Diego
California
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
Renters will find significantly cheaper housing in Phoenix — median rent of $1,582/mo versus $2,313/mo in San Diego, a 32% difference. Home buyers face a steeper market in San Diego: the median home is $906,700 versus $420,700 in Phoenix — 54% 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.
Phoenix
Income tax: N/A
Sales tax: N/A
San Diego
Income tax: N/A
Sales tax: N/A
Phoenix has cleaner air on average: 28.0 AQI (Good) compared to 59.0 AQI (Moderate) in the other city. Lower AQI means cleaner, healthier air.
Pick Phoenix if you prioritize lower overall cost of living (index 104.7 vs 110.7).
Pick San Diego if you prioritize higher median household income ($108,077/yr).
Pick Phoenix if you prioritize cheaper rent ($1,582/mo median).
Pick Phoenix if you prioritize cleaner air quality (avg AQI 28.0).
Is Phoenix cheaper than San Diego?
Phoenix is cheaper overall, with a cost of living index of 104.7 versus 110.7 (US average = 100). That means prices run about 5% lower in Phoenix.
How much is rent in Phoenix vs San Diego?
Median rent is $1,582/mo in Phoenix, AZ and $2,313/mo in San Diego, CA. Phoenix, AZ has the lower rent by about 32%.
Which has higher salaries — Phoenix or San Diego?
Median household income is $81,332 in Phoenix, AZ and $108,077 in San Diego, CA. San Diego, CA 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?
Phoenix, AZ has better air quality on average: 28.0 AQI versus 59.0 AQI. Both are EPA AirNow annual averages; lower is better.
Which has lower taxes — Phoenix or San Diego?
State tax data is not yet available for one or both cities.
What salary do I need in San Diego to match my Phoenix income?
To maintain the same purchasing power, a salary of $100,000 in Phoenix, AZ is equivalent to roughly $105,794 in San Diego, CA (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
