Salary needed
A $50,000 salary in Contra Costa County, CA would need to be about $31,830 in St. Louis County, MO, or $18,170 less, to match the modeled cost ratio.
Contra Costa County, CA vs St. Louis County, MO: Cost of Living Difference
Is it cheaper?
St. Louis County, MO is cheaper than Contra Costa County, CA.
Moving to St. Louis County, MO is estimated to save $27,555 per year.
Cheaper County
St. Louis County, MOSave about $27,555 per year.Salary needed
$50,000 in Contra Costa County, CA is about $31,830 in St. Louis County, MO.
Biggest drivers
No measured category is higher in St. Louis County, MO. Housing saves $10,942 per year.
Housing: $10,942 lower in St. Louis County, MO
Taxes: $8,905 lower in St. Louis County, MO
Childcare: about the same in both counties
Healthcare: $1,924 lower in St. Louis County, MO
Food: $242 lower in St. Louis County, MO
Transport: $2,070 lower in St. Louis County, MO
Contra Costa County, CA→St. Louis County, MO
Equivalent salary in St. Louis County, MO
$31,830
-36.34% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Contra Costa County, CA: $146,002
Median Income in St. Louis County, MO: $108,392
Living Index in Contra Costa County, CA 51.94%
Living Index in St. Louis County, MO 44.53%
This estimate matches your purchasing power (equivalent salary) when moving from Contra Costa County, CA to St. Louis County, MO.
* 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 St. Louis County, MO is estimated to save $27,555 per year. A $50,000 salary in Contra Costa County, CA would have similar purchasing power to about $31,830 in St. Louis County, MO. The largest savings come from housing and taxes.
This is a -36.34% decrease in modeled annual costs. Housing is $10,942 per year lower (-47.02%); Taxes is $8,905 per year lower (-49.16%).
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 St. Louis County, MO, 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 44.5% in St. Louis County, MO. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Housing
Housing is $10,942 per year lower in St. Louis County, MO than in Contra Costa County, CA. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether St. Louis County, MO changes their baseline budget.
Food
Food is $242 per year lower in St. Louis County, MO than in Contra Costa County, CA. Food costs affect weekly cash flow, so even a smaller annual gap in St. Louis County, MO can show up quickly for households that cook most meals at home.
Transportation
Transportation is $2,070 per year lower in St. Louis County, MO 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 St. Louis County, MO.
Healthcare
Healthcare is $1,924 per year lower in St. Louis County, MO than in Contra Costa County, CA. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if St. Louis County, MO changes provider networks or plan options.
Other necessities
Other necessities is $3,473 per year lower in St. Louis County, MO than in Contra Costa County, CA. Other necessities cover everyday basics, so changes in St. Louis County, MO 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 St. Louis County, MO, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in St. Louis County, MO, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $8,905 per year lower in St. Louis County, MO than in Contra Costa County, CA. Taxes affect take-home pay, so the gap in St. Louis County, MO 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 St. Louis County, MO.
Biggest Cost
Largest annual cost increase when moving to St. Louis County, MO
Annual Increase:
No increase
No measured category is higher in St. Louis County, MO.
Biggest Savings
Largest annual savings when moving to St. Louis County, MO
Annual Savings:
$10,942 per year
HOUSING has the largest annual savings when moving to St. Louis County, MO.
Breakdown of price percentages per category.
Numbers are average costs per section.
| Category | Difference | |
|---|---|---|
| Housing | -47% lower | |
| Food | -5% lower | |
| Transport | -15% lower | |
| Healthcare | -28% lower | |
| Other Costs | -40% lower | |
| Childcare | 0% higher | |
| Taxes | -49% lower |
In St. Louis County, MO, modeled annual costs are $48,272 compared with $75,827 in Contra Costa County, CA.
Overall, annual costs are lower in St. Louis County, MO. The category breakdown above shows where the move creates the most room in the budget.
In this case St. Louis County, MO and Contra Costa County, CA are both metropolitan locations.
Use our map to visually compare multiple counties at once.
