How to Compare Cost of Living Between Two Cities

Planning a move to a new city? The first question everyone asks is "how much more (or less) will it cost?" But most people compare costs incorrectly. They look at rent, maybe check a few Zillow listings, and call it a day. A proper cost-of-living comparison considers six expense categories, tax implications, and the critical difference between overall spending and salary-dependent costs.

Here is a complete guide to comparing cost of living the right way.

Step 1: Understand the Six Cost Categories

A comprehensive cost-of-living comparison includes six categories, weighted by how much the average American household spends in each:

• Housing (33.3%): Rent or mortgage, property taxes, insurance, maintenance
• Miscellaneous (21.5%): Entertainment, clothing, personal care, education, everything else
• Transportation (17.5%): Car payments, gas, insurance, public transit, maintenance
• Groceries (12.8%): Food at home, household supplies
• Healthcare (7.9%): Insurance premiums, copays, prescriptions, dental
• Utilities (7.0%): Electricity, gas, water, internet, phone

The weights come from the BLS Consumer Expenditure Survey, which surveys 14,000 households annually. These percentages represent the typical American household. Your personal spending may differ, which is why understanding each category matters.

Step 2: Get Accurate Data (Not Crowdsourced Guesses)

Many popular cost-of-living tools rely on crowdsourced data: users report what they pay for groceries, a coffee, or a gym membership. This approach has serious problems:

• Selection bias: People who report prices are not representative of the general population
• Small sample sizes: Some cities have dozens of reports, others have thousands
• Outdated data: Individual price reports can be months or years old
• No methodology: Comparing one person's grocery bill in NYC to another's in Austin is not science

Better sources include:

• BLS Consumer Expenditure Survey: National spending baselines by category
• HUD Fair Market Rents: Government-calculated rent estimates for every ZIP code
• BLS Regional Price Parities: Metro-level price indices for all major categories
• Census Bureau ACS: Income, housing costs, and demographics at the county level

MoveNumbers uses all of these sources. See our full methodology for details on how we calculate cost indices.

Step 3: The 60/40 Rule for Salary Equivalence

This is the most important concept most people miss. Not all of your income is affected by where you live. Think about it:

• Federal taxes are the same everywhere
• Savings and investments cost the same
• Online purchases are priced identically
• Student loan payments do not change with location

Research shows that approximately 60% of household spending is location-dependent (housing, local groceries, transportation, utilities), while 40% is location-independent (savings, federal taxes, online shopping, insurance premiums).

The equivalent salary formula is:

Equivalent salary = Current salary x (0.40 + 0.60 x Destination cost index / Origin cost index)

Example: You earn $100,000 in San Francisco (cost index: 201) and are considering Austin (cost index: 103).

Equivalent salary = $100,000 x (0.40 + 0.60 x 103/201) = $100,000 x (0.40 + 0.307) = $70,700

You only need $70,700 in Austin to match your SF lifestyle. That is a 29.3% salary cut you can absorb, not the 49% that naive calculations suggest.

Step 4: Factor in Taxes (The Most Common Mistake)

Taxes are the most frequently overlooked factor in cost-of-living comparisons. State and local income taxes vary enormously:

• Zero income tax states: Alaska, Florida, Nevada, New Hampshire (limited), South Dakota, Tennessee, Texas, Washington, Wyoming
• Low tax states: Indiana (3.05%), North Dakota (1.95%), Pennsylvania (3.07%)
• High tax states: California (up to 13.3%), New York (up to 10.9%), New Jersey (up to 10.75%)
• City taxes: NYC (3.1-3.9%), Philadelphia (3.75%), Detroit (2.4%)

On a $100,000 salary, the difference between California (13.3% top rate) and Texas (0%) is roughly $8,000-10,000 per year. That is $670-830 per month, a bigger impact than many cost-of-living categories.

Always include state and local taxes in your comparison. TaxTakeHome.com calculates exact take-home pay by state.

Step 5: Account for Housing Differences Properly

Housing is the largest expense category and the most variable. Common mistakes include:

Comparing different housing types: A 1-bedroom apartment in Manhattan is not the same product as a 1-bedroom in suburban Phoenix. Square footage, amenities, commute time, and neighborhood safety all differ. Try to compare equivalent housing: similar size, similar quality, similar commute to work.

Ignoring rent vs. buy dynamics: In some cities (San Francisco, NYC), renting is dramatically cheaper than buying on a monthly basis. In others (Dallas, Raleigh), buying can be cheaper than renting. Your housing cost depends on which path you choose.

Forgetting property taxes: A $400,000 home in Texas (property tax: ~1.8%) costs $7,200/year in property taxes. The same-priced home in Colorado (0.51%) costs $2,040. That is a $5,160 annual difference that does not show up in home price comparisons.

Step 6: Consider Transportation Differences

Transportation costs vary wildly based on city design:

• Car-free cities (NYC, SF, Chicago, Boston): No car payment, no insurance, no gas. A transit pass ($100-150/mo) replaces $500-700/mo in car expenses.
• Car-dependent cities (Phoenix, Dallas, Atlanta, Houston): Budget $400-700/mo for car ownership including payment, insurance, gas, and maintenance.
• Hybrid cities (Denver, Seattle, Portland): Transit is available but limited. Many residents still need cars for suburban errands.

If you currently live car-free in NYC and move to Phoenix, your transportation costs might increase by $500/month, partially offsetting housing savings.

Step 7: Run the Full Comparison

Here is a complete example. You earn $120,000 in Boston (cost index: 152) and are considering Nashville (cost index: 93).

Equivalent salary needed: $120,000 x (0.40 + 0.60 x 93/152) = $120,000 x 0.767 = $92,040

Tax savings: Massachusetts 5% flat tax = $6,000/year. Tennessee has no income tax. Annual tax savings: ~$6,000.

Housing savings: Boston 1BR: $2,800/mo. Nashville 1BR: $1,400/mo. Monthly savings: $1,400 ($16,800/year).

Transportation change: Boston (no car + transit pass): $150/mo. Nashville (car required): $500/mo. Monthly increase: $350 ($4,200/year).

Net annual savings: ~$18,600 after all adjustments. That is real, usable money.

Common Pitfalls to Avoid

Pitfall 1: Comparing sticker prices. A $2,000/mo apartment in Nashville is not the same product as a $2,000/mo apartment in NYC. The Nashville apartment is probably twice the size with in-unit laundry and parking included.

Pitfall 2: Ignoring lifestyle changes. Moving from NYC to Austin means you will eat out less (fewer restaurants walking distance), drive more (car costs go up), but enjoy cheaper entertainment and outdoor activities. Your spending patterns will shift.

Pitfall 3: Using outdated data. Cost of living changes year to year. Austin in 2020 was dramatically cheaper than Austin in 2026. Always use current-year data.

Pitfall 4: Forgetting moving costs. The act of moving costs $3,000-10,000+ depending on distance. Factor this into your first-year calculations.

Tools for Accurate Comparison

MoveNumbers lets you enter your salary and two cities to get a personalized comparison across all six cost categories, including equivalent salary calculations. All data comes from government sources (BLS, HUD, Census), not crowdsourced estimates.

For a deeper dive, check out:

• City Explorer: Browse all cities ranked by cost of living
• Our Methodology: Exactly how we calculate every number
• Blog: City-specific deep dives with detailed analysis

Data sourced from BLS Consumer Expenditure Survey, HUD Fair Market Rents FY2026, BLS Regional Price Parities, Census Bureau ACS, and state tax authorities.