Cost of living is the single biggest factor in determining what your salary is actually worth. A $100,000 income in Mississippi buys a fundamentally different lifestyle than $100,000 in California — and the gap is wider than most people realize. The cost of living index assigns every state a number relative to the national average of 100. A state with an index of 85 is 15% cheaper than average. A state at 142 is 42% more expensive. Understanding these numbers is essential for anyone evaluating a job offer, planning a relocation, or trying to figure out why their paycheck does not seem to go as far as it should.
The ten cheapest states in the United States by cost of living index are Mississippi (83), West Virginia (83), Arkansas (86), Oklahoma (87), Alabama (88), Iowa (89), Missouri (89), Indiana (90), Kentucky (90), and Ohio (90). In these states, housing is dramatically cheaper — median home prices range from $130,000 to $190,000, and monthly rents for a two-bedroom apartment run $700 to $1,000. Groceries, utilities, and transportation costs also fall 10% to 20% below the national average. For someone earning $60,000, living in Mississippi provides the equivalent purchasing power of about $72,300 at the national average.
The ten most expensive states tell a starkly different story. Hawaii leads at 192 — nearly double the national average — driven primarily by the cost of importing goods to an island chain. California follows at 142, propelled by astronomical housing costs in its major metro areas. Then come Alaska (127), New York (125), Massachusetts (118), New Jersey (115), Maryland (112), Connecticut (111), Oregon (110), and Washington (110). In these states, a $100,000 salary buys considerably less than it would in middle America.
Salary equivalents make the gap tangible. A $100,000 salary in California (COL index 142) has the same purchasing power as approximately $58,000 in Mississippi (COL index 83). In other words, someone earning $58,000 in Mississippi can afford the same quality of life — same size home, same groceries, same entertainment — as someone earning $100,000 in California. Conversely, to maintain a California lifestyle in Mississippi, you only need 58% of your California salary. These equivalents are calculated by dividing the target state's index by the origin state's index and multiplying by the salary.
Housing is the dominant driver of cost of living differences, typically accounting for 60% to 70% of the variation between states. The median home price in West Virginia is approximately $140,000. In California, it exceeds $850,000. That means a 20% down payment in California ($170,000) would buy an entire house outright in West Virginia with $30,000 to spare. Monthly mortgage payments reflect this gap: roughly $750 in West Virginia versus $4,500 in California on a median-priced home with 20% down at current rates. Rent follows a similar pattern, with one-bedroom apartments averaging $650 in low-cost states and $2,200 or more in high-cost metros.
Taxes interact with cost of living in ways that can either amplify or offset the differences. Low-tax states with low cost of living offer the greatest purchasing power per dollar earned. Texas combines zero state income tax with a cost of living index around 93, meaning a $100,000 salary keeps more dollars in your pocket and those dollars go further. Tennessee offers the same zero income tax with an even lower COL index of 90. Florida, South Dakota, and Wyoming round out the group of states that offer both no income tax and below-average cost of living.
The worst value proposition in the country is New York City, which combines some of the highest taxes in the nation with an extreme cost of living. New York State income tax reaches 10.9%, New York City adds up to 3.876%, and the metro area COL index exceeds 180. A $150,000 salary in NYC yields roughly $100,000 after federal, state, and city taxes — and that $100,000 has the purchasing power of about $55,500 at the national average. By comparison, a $100,000 salary in Nashville, Tennessee yields about $78,000 after taxes, with the purchasing power of approximately $86,700 at the national average. The Nashville earner is materially wealthier despite earning $50,000 less.
The remote work revolution has turned cost of living arbitrage into a mainstream financial strategy. Workers earning San Francisco or New York salaries while living in low-cost states capture an enormous gap. A software engineer earning $180,000 from a San Francisco company while living in Austin, Texas keeps about $138,000 after taxes (no state income tax). That $138,000 has the purchasing power of roughly $131,000 at the national average. The same engineer living in San Francisco would keep about $122,000 after taxes, with purchasing power equivalent to only $86,000 at the national average. The remote worker in Austin is $45,000 better off in real terms.
Let us examine a $150,000 remote salary across five different states to illustrate the compounding effect of taxes and cost of living. In California: take-home approximately $108,000, adjusted purchasing power $76,000. In New York: take-home approximately $105,000, adjusted purchasing power $84,000. In Colorado: take-home approximately $113,000, adjusted purchasing power $107,000. In Texas: take-home approximately $117,000, adjusted purchasing power $126,000. In Tennessee: take-home approximately $117,000, adjusted purchasing power $130,000. The difference between California and Tennessee is $54,000 in real purchasing power on the same gross salary.
Migration data confirms that Americans are responding to these differences with their feet. Over the past five years, the states gaining the most domestic migrants are Texas, Florida, Tennessee, North Carolina, and Arizona — all of which combine reasonable or zero state income taxes with below-average to moderate cost of living. The states losing the most residents are California, New York, Illinois, New Jersey, and Massachusetts — all high-tax, high-cost states. The trend accelerated during the pandemic as remote work made geographic arbitrage feasible for millions of workers.
An important caveat: lower cost of living almost always correlates with lower local salaries. If you are not a remote worker and need to find employment in a low-cost state, the salary you command will typically be lower. A registered nurse earning $95,000 in California might earn $55,000 for the same role in Mississippi. After adjusting for both the salary difference and cost of living, the California nurse may still come out ahead — or at worst break even. The cost of living advantage is most powerful when you can decouple your salary from your location through remote work, freelancing, or investment income.
Cost of living indices also fail to capture important quality-of-life factors that have real economic value. States with lower cost of living may have fewer top-tier hospitals, weaker public school systems, less cultural infrastructure, and limited public transportation. These deficiencies can impose hidden costs: private school tuition, longer commutes, travel for specialized healthcare, or higher car ownership costs in areas without public transit. A $5,000 annual savings from lower cost of living means little if you spend $8,000 more on private schooling because public schools are inadequate.
Climate and natural disaster risk are increasingly relevant financial factors that cost of living indices do not fully capture. Low-cost states in tornado alley, hurricane zones, or areas prone to extreme heat may require higher insurance premiums, more expensive home construction standards, and higher utility bills. Florida's cost of living index of 101 looks reasonable until you factor in homeowner insurance premiums of $4,000 to $10,000 per year — a cost that does not appear in standard COL calculations but dramatically affects your monthly budget.
Use our cost of living calculator to see exactly what your salary is worth in any state. Try the relocation calculator to model the full financial impact of a move — including taxes, housing costs, and salary adjustments. And check the salary equivalents tool to compare what you would need to earn in a new state to maintain your current lifestyle.