How Cost of Living Comparisons Work
A cost of living index measures the relative price of a basket of goods and services in a city compared to the national average (set at 100). A city with an index of 130 costs 30% more than average; a city with an index of 85 costs 15% less.
To find the equivalent salary in a new city, multiply your current salary by the ratio of the two indexes:
Equivalent Salary = Current Salary × (Target City Index ÷ Current City Index)
For example: if you earn $80,000 in a city with index 95 and are moving to a city with index 140, you'd need $80,000 × (140 ÷ 95) = $117,900 to maintain the same lifestyle.
Why Housing Dominates the Comparison
Housing costs vary more dramatically between cities than any other category. Groceries in San Francisco might be 15% above average; housing might be 200% above average. This is why two cities can have similar overall indexes but radically different housing costs — and why housing is often the deciding factor in relocation decisions.
When evaluating a move, look at the housing index specifically. A city that appears only 20% more expensive overall might have housing costs that are 60% higher, which matters enormously if you're renting or buying.
What Cost of Living Indexes Don't Capture
- State income taxes: Moving from Texas (no income tax) to California (up to 13.3%) can cost more than the cost of living index suggests. Use the Income Tax Calculator to compare.
- Neighborhood variation: Indexes represent metro-wide averages. Costs can vary enormously within a single city.
- Lifestyle differences: If you spend heavily on dining out or entertainment, cities with high costs in those categories will affect you more than the overall index suggests.
- Commute costs: A city may have lower housing costs but require a long, expensive commute that narrows the gap.
Frequently Asked Questions
Should I take a job offer in a higher cost-of-living city?
Use this calculator to find the equivalent salary, then compare it to the actual offer. If the offer exceeds the equivalent salary, you'd come out ahead financially. Also factor in state income tax differences, career growth potential, and quality-of-life factors beyond pure cost.
Is remote work changing cost of living decisions?
Yes significantly. Remote workers earning salaries from high-cost cities while living in low-cost areas gain a substantial financial advantage. This has driven significant migration from coastal metros to lower-cost cities — and has begun pushing up costs in some previously affordable markets.