Salary needed
A $50,000 salary in Contra Costa County, CA would need to be about $36,530 in Cook County, IL, or $13,470 less, to match the modeled cost ratio.
Contra Costa County, CA vs Cook County, IL: Cost of Living Difference
Is it cheaper?
Cook County, IL is cheaper than Contra Costa County, CA.
Moving to Cook County, IL is estimated to save $20,428 per year.
Cheaper County
Cook County, ILSave about $20,428 per year.Salary needed
$50,000 in Contra Costa County, CA is about $36,530 in Cook County, IL.
Biggest drivers
No measured category is higher in Cook County, IL. Taxes saves $6,384 per year.
Housing: $6,092 lower in Cook County, IL
Taxes: $6,384 lower in Cook County, IL
Childcare: about the same in both counties
Healthcare: $1,949 lower in Cook County, IL
Food: $311 lower in Cook County, IL
Transport: $3,703 lower in Cook County, IL
Contra Costa County, CA→Cook County, IL
Equivalent salary in Cook County, IL
$36,530
-26.94% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Contra Costa County, CA: $146,002
Median Income in Cook County, IL: $102,297
Living Index in Contra Costa County, CA 51.94%
Living Index in Cook County, IL 54.16%
This estimate matches your purchasing power (equivalent salary) when moving from Contra Costa County, CA to Cook County, IL.
* Living index is estimated as (estimated total cost / area median income) * 100. A living index above 100% means modeled costs exceed median income.
Cost of Living Breakdown by Category
Summary
Moving from Contra Costa County, CA to Cook County, IL is estimated to save $20,428 per year. A $50,000 salary in Contra Costa County, CA would have similar purchasing power to about $36,530 in Cook County, IL. The largest savings come from taxes and housing.
This is a -26.94% decrease in modeled annual costs. Taxes is $6,384 per year lower (-35.24%); Housing is $6,092 per year lower (-26.18%).
Below we break down the annual categories behind the difference using Economic Policy Institute 2026 Family Budget data.
Why this comparison matters
These notes use the actual annual cost differences between Contra Costa County, CA and Cook County, IL, so the page highlights the budget tradeoffs behind the total.
Affordability vs median income
Modeled annual costs equal about 51.9% of median family income in Contra Costa County, CA and 54.2% in Cook County, IL. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Housing
Housing is $6,092 per year lower in Cook County, IL than in Contra Costa County, CA. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether Cook County, IL changes their baseline budget.
Food
Food is $311 per year lower in Cook County, IL than in Contra Costa County, CA. Food costs affect weekly cash flow, so even a smaller annual gap in Cook County, IL can show up quickly for households that cook most meals at home.
Transportation
Transportation is $3,703 per year lower in Cook County, IL than in Contra Costa County, CA. Transportation matters for commuters because driving distance, vehicle costs, and transit access can change how much of a salary is left after getting around Cook County, IL.
Healthcare
Healthcare is $1,949 per year lower in Cook County, IL than in Contra Costa County, CA. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if Cook County, IL changes provider networks or plan options.
Other necessities
Other necessities is $1,988 per year lower in Cook County, IL than in Contra Costa County, CA. Other necessities cover everyday basics, so changes in Cook County, IL help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in Contra Costa County, CA and Cook County, IL, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in Cook County, IL, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $6,384 per year lower in Cook County, IL than in Contra Costa County, CA. Taxes affect take-home pay, so the gap in Cook County, IL matters even if the headline salary looks similar before deductions.
What changed the most?
The following cards show the annual category differences that most affect the move to Cook County, IL.
Biggest Cost
Largest annual cost increase when moving to Cook County, IL
Annual Increase:
No increase
No measured category is higher in Cook County, IL.
Biggest Savings
Largest annual savings when moving to Cook County, IL
Annual Savings:
$6,384 per year
TAXES has the largest annual savings when moving to Cook County, IL.
Breakdown of price percentages per category.
Numbers are average costs per section.
| Category | Difference | |
|---|---|---|
| Housing | -26% lower | |
| Food | -6% lower | |
| Transport | -27% lower | |
| Healthcare | -28% lower | |
| Other Costs | -23% lower | |
| Childcare | 0% higher | |
| Taxes | -35% lower |
In Cook County, IL, modeled annual costs are $55,399 compared with $75,827 in Contra Costa County, CA.
Overall, annual costs are lower in Cook County, IL. The category breakdown above shows where the move creates the most room in the budget.
In this case Cook County, IL and Contra Costa County, CA are both metropolitan locations.
Use our map to visually compare multiple counties at once.
