Cost of Living: How to Actually Compare Two Cities Honestly

Every cost-of-living comparison starts with the same misleading number: average rent. It’s the figure every “cheapest cities” listicle leads with, and it’s the one that lies most often — because average rent is a proxy for a housing market, not a measurement of what your life costs in a place. Your actual cost of living is a stack of six or seven line items, they move in different directions in every city, and the biggest ones aren’t rent at all. This post is the method I use to compare two places honestly, with a worked example you can copy. If you’re going to make a move — across the country or across an ocean — this is the spreadsheet that should come before the flight search.

Why Most Comparisons Fail

The generic comparison sites will tell you City B is “23% cheaper than City A.” That number is built for tourists, priced for bachelors, and averages away everything specific to your family. A single 25-year-old and a family of four with two kids in childcare live in the same city at wildly different costs — the family’s childcare line alone can exceed the rent difference between two metros. Honest comparison means pricing your household’s actual basket in both places, which takes an evening with a spreadsheet and produces an answer you can actually act on. The stakes are real: this is the arithmetic underneath the whole domestic-geoarbitrage strategy, and the international version of the same idea is what I introduced in the six-step geo-arbitrage plan.

The Six Line Items That Actually Decide It

1. Housing — but in both directions. Price the rent you’d actually pay at your actual size, and the price of buying the home you’d actually own, because the rent-vs-buy calculus flips between cities. A city where renting is cheap but buying is stratospheric changes the long-run math.
2. Taxes — all of them, not just income tax. State income tax, sales tax, property tax (even for renters, via rent), and vehicle taxes. A no-income-tax state often collects the difference elsewhere; compare total burden, not the loudest line.
3. Childcare and education. The most unequal line item in America — swings of several hundred dollars a month between metros for the same care are normal. If it applies to you, price it first, not last.
4. Cars and commuting. A city where you shed a car saves a monthly payment, insurance, fuel, and parking in one stroke — often $400–700 a month. A city that forces two cars erases rent savings that look bigger than they are.
5. Healthcare and insurance. Premiums and plan availability vary by state and market, and access to specific specialists is part of the price. If anyone in your household has ongoing needs, this line can veto an otherwise great comparison.
6. The boring multiplier — utilities, insurance, groceries, services. Electricity in hot climates, home insurance in disaster-prone ones, and the general price of a haircut or a plumber all vary more than people expect. They’re individually small and collectively real.

Worked Example: Two Cities, One Family (Hypothetical, Labeled)

Illustrative numbers for a family of four with two young kids and a portable income of $90,000 — the numbers are invented, the method is the point:

Line item	City A (bigger metro)	City B (smaller metro)	Annual difference
Rent (3-bed, their actual size)	$2,100/mo	$1,350/mo	+$9,000
State income tax (5% vs 0%)	~$4,500/yr	$0	+$4,500
Childcare (one toddler)	$1,400/mo	$950/mo	+$5,400
Cars (two cars vs one + transit)	$700/mo	$350/mo	+$4,200
Healthcare premiums	equal	equal	$0
Everything else (net)	—	—	assumed even

Total: City B comes out about $23,100 a year cheaper — $1,925 a month — before you’ve priced a single intangible. Notice the shape of that table: rent, the headline number everyone leads with, is less than half of the total difference. Childcare and the second car — lines that never appear on cheap-cities lists — are worth $9,600 a year together. This is why “cheaper city” comparisons that only quote housing costs are systematically misleading for families.

The Salary Adjustment: Price It Before You Fall in Love

Now the line that breaks most naive arbitrage plans: income isn’t fixed. If your salary is portable, fine — but if your employer reprices pay by location, or if a local job market pays less for the same role, the effective saving is the cost difference minus the pay cut. A move that saves $23,100 while cutting income $18,000 still wins, but one that saves $23,100 against a $25,000 cut loses. Run the comparison as purchasing power — income minus costs, in both places — and never as costs alone. And check the deeper question: is your industry even present in the smaller city? A cheap city with a thin job market for your field is a cheap city with a trapdoor in it, because options matter most in the year you need them. I walk through that salary-adjustment trap in detail in the domestic geoarbitrage post above.

Where to Get Real Numbers (Instead of Averages)

Averages are for browsing; your basket needs real quotes. Rent: live listings at your target size, not published medians. Childcare: call three centers in each city — the range within one city will embarrass the comparison sites. Insurance: get actual quotes, since car and home insurance vary enormously by zip. Taxes: state and local calculators give a decent effective-rate approximation at your income. Healthcare: price marketplace plans for both zip codes if you’re pre-Medicare. Groceries and utilities: budget roughly from national data, then adjust for the obvious cases (extreme climates, car-dependent regions). This is an evening of work, and it produces a document worth more than a dozen listicles.

The Intangibles, Which I Won’t Pretend Are a Footnote

Here’s the part of the method that keeps it honest. After the spreadsheet, write down — in words, not dollars — what each city offers that the other doesn’t: proximity to grandparents, a faith community that fits, schools with the program your kid needs, the medical specialists your family uses, weather that your mental health tolerates, the friend group that took twenty years to build. Some of these are worth more than any line in the table, and pretending otherwise produces moves that unravel in eighteen months. The mature version of a cost-of-living comparison is a two-column verdict: what the money says, and what the life says. When they agree, move fast. When they disagree, the money rarely wins for long — a rent saving of $500 a month has a way of quietly becoming a flights-home budget.

One more honest observation from watching people do this well: the best arbitrage moves often aren’t to the “cheap cities” at all — they’re one ring out from expensive. The suburb or secondary metro twenty minutes from a great job market keeps most of the access and sheds much of the premium. Extreme versions of this thinking — whole countries where the math is dramatic, like the questions I engaged with in my look at Cuenca, Ecuador — are a different calculation with different frictions, and the same six-line method still applies.

Your Copyable Template

Forward step: build the table above for your two candidate places tonight — six lines, real quotes where you can get them, annualized. Then add the seventh row: the salary each city would actually pay you. Whatever the verdict, you’ll have made the decision with open eyes, which is more than most movers can say. And if the numbers come out compelling, the strategy they feed is the layered version in geoarbitrage from the US — the comparison is the tool; the move is just what you do with it.