Affordability vs median income
Modeled annual costs equal about 45.6% of median family income in Nassau County, NY and 50.8% in San Mateo County, CA. This matters because a cheaper county can still feel tight if typical local incomes are also lower.
Nassau County, NY vs San Mateo County, CA: Cost of Living Difference
Nassau County, NY is cheaper than San Mateo County, CA for modeled annual cost of living. This comparison shows the yearly cost gap, salary needed to keep similar purchasing power, and the categories driving the difference.
Is it cheaper?
Nassau County, NY is cheaper than San Mateo County, CA.
Cheaper place
Nassau County, NYSpend $18,127 more per year.Cost gap
Moving to San Mateo County, CA is estimated to cost $18,127 more per year.
AnnualSpend $18,127 more per year.
MonthlySpend $1,511 more per month.
Salary needed
$50,000 in Nassau County, NY is about $61,990 in San Mateo County, CA.
Biggest drivers
Housing increases by $8,179 per year. Healthcare saves $520 per year.
Nassau County, NY→San Mateo County, CA
Equivalent salary in San Mateo County, CA
$61,990
+23.98% higher
Current salary: $50,000
Household: 1 adult · 0 children
Median Income in Nassau County, NY: $165,692
Median Income in San Mateo County, CA: $184,583
annual living index in Nassau County, NY 45.62%
annual living index in San Mateo County, CA 50.77%
This estimate matches your purchasing power (equivalent salary) when moving from Nassau County, NY to San Mateo County, CA.
* Living index is estimated as (estimated annual total cost / area median annual income) * 100. A living index above 100% means modeled costs exceed median income.
Cost of Living Breakdown by Category
Category-by-category comparison
Annual costs are shown for the selected household. The difference column shows how much more or less the category costs in San Mateo County, CA compared with Nassau County, NY.
| Category | Nassau County, NY | San Mateo County, CA | Annual difference | Monthly impact | Direction |
|---|---|---|---|---|---|
| Housing | $22,202 | $30,381 | +$8,179(36.84%) | +$682 | Higher in San Mateo County, CA |
| Taxes | $18,672 | $25,053 | +$6,381(34.17%) | +$532 | Higher in San Mateo County, CA |
| Other Costs | $8,373 | $11,095 | +$2,722(32.51%) | +$227 | Higher in San Mateo County, CA |
| Transport | $13,523 | $14,301 | +$778(5.75%) | +$65 | Higher in San Mateo County, CA |
| Food | $4,766 | $5,354 | +$588(12.34%) | +$49 | Higher in San Mateo County, CA |
| Healthcare | $8,055 | $7,535 | -$520(-6.46%) | -$43 | Lower in San Mateo County, CA |
| Childcare | $0 | $0 | $0(0%) | $0 | About even |
Why this comparison matters
These notes use the actual annual cost differences between Nassau County, NY and San Mateo County, CA, so the page highlights the budget tradeoffs behind the total.
Housing
Housing is $8,179 per year higher in San Mateo County, CA than in Nassau County, NY. Housing usually behaves like a fixed monthly commitment, so this matters most for renters or buyers checking whether San Mateo County, CA changes their baseline budget.
Food
Food is $588 per year higher in San Mateo County, CA than in Nassau County, NY. Food costs affect weekly cash flow, so even a smaller modeled gap in San Mateo County, CA can show up quickly for households that cook most meals at home.
Transportation
Transportation is $778 per year higher in San Mateo County, CA than in Nassau County, NY. Transportation matters for commuters because driving distance, vehicle costs, and transit access can change how much of a salary is left after getting around San Mateo County, CA.
Healthcare
Healthcare is $520 per year lower in San Mateo County, CA than in Nassau County, NY. Healthcare differences are useful for planning premiums and out-of-pocket exposure, especially if San Mateo County, CA changes provider networks or plan options.
Other necessities
Other necessities is $2,722 per year higher in San Mateo County, CA than in Nassau County, NY. Other necessities cover everyday basics, so changes in San Mateo County, CA help explain the non-housing costs that can quietly add up month after month.
Childcare
Childcare is about the same in Nassau County, NY and San Mateo County, CA, so this category is not a major driver of the modeled gap. Childcare is most important for households with children; in San Mateo County, CA, this line can swing the result even when housing or taxes look manageable.
Taxes
Taxes is $6,381 per year higher in San Mateo County, CA than in Nassau County, NY. Taxes affect take-home pay, so the gap in San Mateo County, CA matters even if the headline salary looks similar before deductions.
Methodology and data vintage
WatchPennies uses county-level 2026 cost estimates from a 2025-2026 cost-data snapshot. The comparison includes housing, food, transportation, healthcare, childcare, other necessities, taxes, total cost, and median family income context when available.
Read the full methodologyFrequently asked questions
Which is cheaper, Nassau County, NY or San Mateo County, CA?
Nassau County, NY is cheaper than San Mateo County, CA by about $18,127 per year.
How much salary is needed in San Mateo County, CA?
A $50,000 salary in Nassau County, NY is modeled as roughly equivalent to $61,990 in San Mateo County, CA for the selected household profile.
What costs are included in this Nassau County, NY vs San Mateo County, CA comparison?
The comparison includes housing, food, transportation, healthcare, childcare, other necessities, taxes, total cost, and median family income context when available.
Is this comparison personalized financial advice?
No. WatchPennies comparisons are directional planning estimates based on county-level public datasets, not personalized financial, tax, housing, or relocation advice.
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