Seattle, WA vs San Diego, CA Cost of Living (2026)

Seattle has a cost of living index of 144.5, about 44.5% above the national average. Housing is a major driver here, with a housing index of 203.6. Typical apartment rent is about $2,970 a month, and median home values are around $1,119,686. The median household income is approximately $94,000.

A $100,000 salary in an average-cost city buys about $69,200 worth of lifestyle in Seattle. That usually means smaller apartments, tighter savings margins, or a longer commute if you want to keep housing costs in check. Outside housing, transportation and miscellaneous costs also run above the national baseline.

Transportation in Seattle is moderately expensive. The city has expanded its light rail network significantly, and residents in neighborhoods along the Link Light Rail corridor can live without a car. That said, most parts of the metro area still require one, and traffic on key corridors like I-5 and I-90 is among the worst in the country during peak hours. Groceries run about 15% above the national average, and healthcare costs are also slightly elevated.

One practical cost consideration: Seattle's rental market has softened from its 2021 peak but remains tight. New apartment construction has added supply, which has moderated prices slightly in some neighborhoods, particularly those farther from downtown. Renters who are flexible on neighborhood and willing to live a few miles from the city center can find meaningfully better value than those who focus on Capitol Hill, South Lake Union, or Belltown.

San Diego has a cost of living index of 147.3, about 47.3% above the national average. Housing is a major driver here, with a housing index of 209.6. Typical apartment rent is about $3,111 a month, and median home values are around $1,145,226. The median household income is approximately $80,000.

A $100,000 salary in an average-cost city buys about $67,900 worth of lifestyle in San Diego. That usually means smaller apartments, tighter savings margins, or a longer commute if you want to keep housing costs in check. Outside housing, utilities and transportation also run above the national baseline.

California's income tax applies fully in San Diego. For a single filer earning $100,000, the marginal state rate is 9.3%. The effective state tax rate at that income level runs around 5 to 6%, and combined with federal income tax and FICA, take-home pay is substantially lower than gross salary. Someone moving from a no-income-tax state like Texas or Florida will notice this immediately in their first paycheck.

Groceries in San Diego run roughly 15 to 20% above the national average. The climate is mild year-round, which reduces heating and cooling costs compared to cities in more extreme climates. Utility bills are moderate relative to San Francisco. One specific housing dynamic worth noting: the San Diego rental market has a relatively low vacancy rate, and renters who move frequently face the risk of resetting to current market prices. Long-term renters in rent-stabilized buildings have enjoyed some protection, but California's AB 1482 rent cap of 5% plus CPI still allows meaningful annual increases.