Salary needed
A $50,000 salary in San Mateo County, CA would need to be about $42,035 in Fairfax County, VA, or $7,965 less, to match the modeled cost ratio.
San Mateo County, CA vs Fairfax County, VA: Cost of Living Difference
Is it cheaper?
Fairfax County, VA is cheaper than San Mateo County, CA.
Moving to Fairfax County, VA is estimated to save $14,932 per year.
Cheaper County
Fairfax County, VASave about $14,932 per year.Salary needed
$50,000 in San Mateo County, CA is about $42,035 in Fairfax County, VA.
Biggest drivers
No measured category is higher in Fairfax County, VA. Taxes saves $5,245 per year.
Housing: $3,392 lower in Fairfax County, VA
Taxes: $5,245 lower in Fairfax County, VA
Childcare: about the same in both counties
Healthcare: $3,059 lower in Fairfax County, VA
Food: $185 lower in Fairfax County, VA
Transport: $1,941 lower in Fairfax County, VA
San Mateo County, CA→Fairfax County, VA
Equivalent salary in Fairfax County, VA
$42,035
-15.93% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in San Mateo County, CA: $184,583
Median Income in Fairfax County, VA: $178,683
Living Index in San Mateo County, CA 50.77%
Living Index in Fairfax County, VA 44.09%
This estimate matches your purchasing power (equivalent salary) when moving from San Mateo County, CA to Fairfax County, VA.
* 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 San Mateo County, CA to Fairfax County, VA is estimated to save $14,932 per year. A $50,000 salary in San Mateo County, CA would have similar purchasing power to about $42,035 in Fairfax County, VA. The largest savings come from taxes and housing.
This is a -15.93% decrease in modeled annual costs. Taxes is $5,245 per year lower (-20.94%); Housing is $3,392 per year lower (-11.16%).
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 San Mateo County, CA and Fairfax County, VA, so the page highlights the budget tradeoffs behind the total.
Affordability vs median income
Modeled annual costs equal about 50.8% of median family income in San Mateo County, CA and 44.1% in Fairfax County, VA. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Housing
Housing is $3,392 per year lower in Fairfax County, VA than in San Mateo County, CA. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether Fairfax County, VA changes their baseline budget.
Food
Food is $185 per year lower in Fairfax County, VA than in San Mateo County, CA. Food costs affect weekly cash flow, so even a smaller annual gap in Fairfax County, VA can show up quickly for households that cook most meals at home.
Transportation
Transportation is $1,941 per year lower in Fairfax County, VA than in San Mateo 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 Fairfax County, VA.
Healthcare
Healthcare is $3,059 per year lower in Fairfax County, VA than in San Mateo County, CA. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if Fairfax County, VA changes provider networks or plan options.
Other necessities
Other necessities is $1,111 per year lower in Fairfax County, VA than in San Mateo County, CA. Other necessities cover everyday basics, so changes in Fairfax County, VA help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in San Mateo County, CA and Fairfax County, VA, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in Fairfax County, VA, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $5,245 per year lower in Fairfax County, VA than in San Mateo County, CA. Taxes affect take-home pay, so the gap in Fairfax County, VA 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 Fairfax County, VA.
Biggest Cost
Largest annual cost increase when moving to Fairfax County, VA
Annual Increase:
No increase
No measured category is higher in Fairfax County, VA.
Biggest Savings
Largest annual savings when moving to Fairfax County, VA
Annual Savings:
$5,245 per year
TAXES has the largest annual savings when moving to Fairfax County, VA.
Breakdown of price percentages per category.
Numbers are average costs per section.
| Category | Difference | |
|---|---|---|
| Housing | -11% lower | |
| Food | -3% lower | |
| Transport | -14% lower | |
| Healthcare | -41% lower | |
| Other Costs | -10% lower | |
| Childcare | 0% higher | |
| Taxes | -21% lower |
In Fairfax County, VA, modeled annual costs are $78,786 compared with $93,718 in San Mateo County, CA.
Overall, annual costs are lower in Fairfax County, VA. The category breakdown above shows where the move creates the most room in the budget.
In this case Fairfax County, VA and San Mateo County, CA are both metropolitan locations.
Use our map to visually compare multiple counties at once.
