Salary needed
A $50,000 salary in Fairfax County, VA would need to be about $38,230 in King William County, VA, or $11,770 less, to match the modeled cost ratio.
Fairfax County, VA vs King William County, VA: Cost of Living Difference
Is it cheaper?
King William County, VA is cheaper than Fairfax County, VA.
Moving to King William County, VA is estimated to save $18,550 per year.
Cheaper County
King William County, VASave about $18,550 per year.Salary needed
$50,000 in Fairfax County, VA is about $38,230 in King William County, VA.
Biggest drivers
Transport increases by $3,385 per year. Housing saves $11,073 per year.
Housing: $11,073 lower in King William County, VA
Taxes: $6,509 lower in King William County, VA
Childcare: about the same in both counties
Healthcare: $189 higher in King William County, VA
Food: $842 lower in King William County, VA
Transport: $3,385 higher in King William County, VA
Fairfax County, VA→King William County, VA
Equivalent salary in King William County, VA
$38,230
-23.54% lower
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Fairfax County, VA: $178,683
Median Income in King William County, VA: $99,444
Living Index in Fairfax County, VA 44.09%
Living Index in King William County, VA 60.57%
This estimate matches your purchasing power (equivalent salary) when moving from Fairfax County, VA to King William 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 Fairfax County, VA to King William County, VA is estimated to save $18,550 per year. A $50,000 salary in Fairfax County, VA would have similar purchasing power to about $38,230 in King William County, VA. The largest savings come from housing and taxes.
This is a -23.54% decrease in modeled annual costs. Housing is $11,073 per year lower (-41.03%); Taxes is $6,509 per year lower (-32.86%).
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 Fairfax County, VA and King William County, VA, so the page highlights the budget tradeoffs behind the total.
Affordability vs median income
Modeled annual costs equal about 44.1% of median family income in Fairfax County, VA and 60.6% in King William County, VA. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Housing
Housing is $11,073 per year lower in King William County, VA than in Fairfax County, VA. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether King William County, VA changes their baseline budget.
Food
Food is $842 per year lower in King William County, VA than in Fairfax County, VA. Food costs affect weekly cash flow, so even a smaller annual gap in King William County, VA can show up quickly for households that cook most meals at home.
Transportation
Transportation is $3,385 per year higher in King William County, VA than in Fairfax County, VA. Transportation matters for commuters because driving distance, vehicle costs, and transit access can change how much of a salary is left after getting around King William County, VA.
Healthcare
Healthcare is $189 per year higher in King William County, VA than in Fairfax County, VA. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if King William County, VA changes provider networks or plan options.
Other necessities
Other necessities is $3,699 per year lower in King William County, VA than in Fairfax County, VA. Other necessities cover everyday basics, so changes in King William County, VA help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in Fairfax County, VA and King William County, VA, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in King William County, VA, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $6,509 per year lower in King William County, VA than in Fairfax County, VA. Taxes affect take-home pay, so the gap in King William 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 King William County, VA.
Biggest Cost
Largest annual cost increase when moving to King William County, VA
Annual Increase:
$3,385 per year
TRANSPORT has the largest annual increase when moving to King William County, VA.
Biggest Savings
Largest annual savings when moving to King William County, VA
Annual Savings:
$11,073 per year
HOUSING has the largest annual savings when moving to King William County, VA.
Breakdown of price percentages per category.
Numbers are average costs per section.
| Category | Difference | |
|---|---|---|
| Housing | -41% lower | |
| Food | -16% lower | |
| Transport | 27% higher | |
| Healthcare | 4% higher | |
| Other Costs | -37% lower | |
| Childcare | 0% higher | |
| Taxes | -33% lower |
In King William County, VA, modeled annual costs are $60,236 compared with $78,786 in Fairfax County, VA.
Overall, annual costs are lower in King William County, VA. The category breakdown above shows where the move creates the most room in the budget.
In this case King William County, VA and Fairfax County, VA are both metropolitan locations.
Use our map to visually compare multiple counties at once.
