A salary that feels comfortable in one city can feel punishing in another. A $90,000 job in Detroit is a genuinely different lifestyle than a $90,000 job in San Francisco, even though the number on the offer letter is identical. This cost of living comparison calculator turns the raw cost-of-living indices of two cities into three numbers you can actually act on: the salary you would need to keep the same lifestyle, the purchasing power your current pay would have in the new city, and the gap between the two.
The math is deliberately simple. Cost-of-living indexes (the kind published by Numbeo, Expatistan, and the U.S. Bureau of Economic Analysis) are scaled so that New York City equals 100. A city with an index of 145 is 45% more expensive than New York; a city with an index of 80 is 20% cheaper. If your current city sits at 100 and your target city sits at 145, every dollar stretches to about 69 cents of buying power there. To keep living the same way, your salary has to rise by the same 45% ratio.
How to Use
- Enter your Current Annual Salary — your gross (pre-tax) annual pay in the city you live in today. Use the full year, not a paycheck.
- Set your Current City Cost-of-Living Index. If you already live in New York, leave it at 100. Otherwise look up your city's index on Numbeo (the default baseline is NYC = 100).
- Set the New City Cost-of-Living Index to the index of the place you are considering relocating to.
- Read the result card. The highlighted Required Equivalent Salary is the pay you would need in the new city to buy the same basket of housing, food, transport, and services you buy today.
- Compare that number to the actual offer on the table. If the offer is below the required salary, the shortfall is your raise (or pay cut) in real terms.
The engine also shows your Purchasing Power in New City — what your current salary would actually feel like after you move, and the Salary Adjustment Needed to break even. A positive adjustment means you need more money; a negative number means the move itself is a raise.
The Index-Ratio Formula
The calculator uses the standard ratio model published by Numbeo and adopted by every major relocation-cost tool:
Required Salary = Current Salary × (New Index ÷ Current Index)
Purchasing Power = Current Salary × (Current Index ÷ New Index)
Worked example: you make $100,000 in a city indexed at 100, and a new offer comes from a city indexed at 145. The required equivalent salary is $100,000 × 145 ÷ 100 = $145,000. Your current $100,000, if you moved without a raise, would buy only $100,000 × 100 ÷ 145 = $68,966 worth of goods and services — a 31% cut in real standard of living.
Because the formula is a pure ratio, it is transparent. There are no hidden weights, no tax adjustments, and no lifestyle assumptions baked in. If you know the two indices, you can do the arithmetic on a napkin. That is the point: a relocation decision should not rest on a black box.
What an Index Actually Measures
Cost-of-living indexes are not one number — they are weighted baskets. Numbeo's headline index blends groceries, restaurants, transportation, and utilities, but deliberately excludes rent. The "Cost of Living Plus Rent Index" folds in housing; the "Local Purchasing Power Index" compares local wages to local prices. When you quote an index in this calculator, pick the one that matches the decision you are making. If housing is your biggest expense (it usually is), use the index that includes rent.
Indexes shift slowly but do move. A city that was 95 last year may be 98 this year as inflation and remote-work demand reshape rents. Always pull a fresh number in the quarter you are negotiating, not the figure you remembered from two years ago.
Examples
Example 1 — The classic coastal move. You earn $100,000 in your current city (index 100) and a recruiter in San Francisco (index roughly 145) offers you $130,000. The required equivalent salary is $145,000, so even with the $30,000 nominal raise you are actually taking a real pay cut: your new $130,000 buys about $89,655 of your current lifestyle. Negotiate toward $145,000 or reconsider.
Example 2 — The cheaper-city win. You earn $90,000 in a city indexed at 100 and a remote-friendly employer in a city indexed at 80 offers $90,000 flat. Required equivalent pay is only $72,000, so the move is effectively a 25% raise in purchasing power. Your $90,000 now buys $112,500 worth of local goods. Same paycheck, noticeably better lifestyle.
Example 3 — A six-figure household. A dual-income household pulling in $200,000 (current index 100) is comparing a move to a city indexed at 130. They would need about $260,000 to hold their lifestyle; their current combined income would feel like roughly $153,846 in the new place. Running the number before signing a lease prevents a very expensive surprise.
FAQ
How is the cost of living comparison calculated?
The calculator uses a simple ratio. Take your current salary, multiply it by the new city's cost-of-living index, and divide by your current city's index. That gives the salary you would need to maintain the same standard of living. This is the same formula published by Numbeo's cost-of-living calculator and used by relocation services worldwide.
Where do the city cost-of-living index numbers come from?
The most widely used public source is Numbeo, which crowdsembles prices on roughly 55 everyday items in thousands of cities and scales them so New York City equals 100. The U.S. Bureau of Economic Analysis also publishes Regional Price Parities for American metro areas. For an international move, Numbeo or Expatistan are the practical defaults.
Is a higher salary always a better deal?
No. A $50,000 raise that moves you from an index of 100 to an index of 160 is a pay cut in real terms. Always compare the offer against the required equivalent salary, not against your old paycheck. The highlighted number on this result card is the break-even.
Does the calculator account for taxes?
Not directly. The indices you enter capture the price side of living (housing, food, transport) but not state and local income tax. If you are moving between, say, Texas and California, also run a state-tax comparison on top of this result, because California's marginal rates can claw back 5–10% of the nominal raise.
What does "purchasing power change" mean?
It is the percentage by which your actual lifestyle would improve or deteriorate if you moved tomorrow at your current salary. A negative number (for example -31%) means your money buys 31% less; a positive number means your money stretches further. A move to a cheaper city should show a positive number.
What if the two cities have the same index?
If both indices are equal, the required equivalent salary equals your current salary, the adjustment is $0, and the purchasing-power change is 0%. That is the control case — the move changes nothing about what your paycheck buys.
Disclaimer
This cost of living comparison calculator is provided for informational purposes only and does not constitute financial, tax, legal, or relocation advice. Cost-of-living indices are estimates that vary by source, by month, and by personal spending habits; actual expenses depend on your housing choice, lifestyle, family size, and tax situation. Always cross-check indices against at least two sources and run a full budget before accepting a relocation offer.