A $75,000 salary in Chicago requires about $94,397 in San Diego to keep your real spending power flat. Housing leads the gap at +40.2% versus a composite +25.9% on the C2ER ACCRA cost-of-living index. Tax sits separately — see the state-tax sidebar.
Multiply your Chicago salary by 1.259 (the index ratio 146/116) to get the San Diego number that preserves your real-terms spending. The three anchor rows below — $50k, $75k, $150k — are the most common comparison points for relocation offers.
| Chicago salary | Equivalent in San Diego | Difference |
|---|---|---|
| $50,000 | $62,931 | +$12,931 |
| $75,000 | $94,397 | +$19,397 |
| $150,000 | $188,793 | +$38,793 |
Aggregated indexes are useful for headline comparisons but rarely match an individual household's experience. The five-category breakdown for Chicago and San Diego below makes the underlying drivers visible so you can map them against your own line-item budget mix.
| Category | Chicago | San Diego | Delta |
|---|---|---|---|
| Housing Rent + median home price | 132 | 185 | +40.2% |
| Groceries Supermarket basket | 100 | 107 | +7.0% |
| Transportation Fuel, transit, parking | 108 | 127 | +17.6% |
| Healthcare Doctor visits, prescriptions | 99 | 102 | +3.0% |
| Utilities Electric, gas, internet | 112 | 113 | +0.9% |
| Composite | 116 | 146 | +25.9% |
For relocators leaving Chicago, IL for San Diego, CA, the cost-of-living math is the part that does not lie. San Diego runs about 26% above Chicago on the composite C2ER index, which means $75,000 in Chicago maps to roughly $94,397 in San Diego just to stay even on real-terms spending power.
State tax sits on top of that as a separate adjustment. Illinois and California can have very different income tax regimes at the same salary level, and the gap is layered onto the consumer-price gap rather than included in it. The sidebar on this page summarizes the state-tax delta at three anchor salaries so you can stack both effects and see the all-in picture before negotiating an offer.
Tax is the silent leg of any cross-state move. Illinois runs a 4.95% top-marginal or flat state income tax; California runs 9.30%. That maps to $3,713 versus $6,975 at the $75,000 anchor income — a $3,263 difference layered on top of the consumer-price comparison above.
Use the take-home pay calculator to model the after-tax difference at your specific salary and filing status. Federal tax stays constant across the move; only the state piece moves. See the take-home pay calculator or the state-by-state take-home pay article for the precise after-tax number.
Short answer: yes. San Diego runs 26% above Chicago on the C2ER ACCRA composite (146 vs 116). Housing is the dominant driver of that gap; non-housing categories contribute smaller pieces in the same direction.
The equivalent salary in San Diego is about $94,397. You get there by multiplying $75,000 by the index ratio (1.26, derived from 146 and 116). This is a consumer-price comparison; layer state tax separately for after-tax parity.
Housing carries the gap. Chicago indexes at 132 on housing; San Diego indexes at 185. The other categories — groceries (100 vs 107), transportation (108 vs 127), utilities (112 vs 113) — move smaller distances. Housing variance is what makes metros feel meaningfully different on cost.
State tax is a separate adjustment. The composite cost-of-living index is a pre-tax, consumer-prices-only measure. Illinois and California state-tax rates differ; the sidebar quantifies that gap at common salary anchors so you can add it to the consumer-price equivalent and get an after-tax number.