Cost of Living in Illinois in 2026: Housing, Salary, Taxes & City Comparison

What does cost of living mean in Illinois?

Cost of living is one of the most important filters home buyers and relocating households can use when comparing markets. A home price by itself is not enough. The better question is how housing, transportation, groceries, utilities, healthcare, and local taxes combine into a realistic monthly budget. In 2026, Illinois has a statewide cost of living index of 93, where 100 represents the national average.

That means Illinois is below the national benchmark overall. But statewide averages hide major local variation. Some cities inside Illinois are much easier on a middle-income budget than others.

Illinois cost of living snapshot

• Statewide cost of living index: 93
• Average home price: $275,000
• Median household income: $78,433
• Property tax rate: 1.97%

The practical takeaway is simple: even in a state with manageable headline costs, housing and tax burdens can still push the monthly budget higher than expected. That is why cost-of-living research should sit next to affordability calculations, not replace them.

City-by-city cost comparison in Illinois

City	Cost of Living Index	Average Home Price	Approx. Salary Benchmark
Chicago	107	$340,000	$85,000
Aurora	95	$290,000	$72,500
Naperville	112	$440,000	$110,000
Rockford	82	$165,000	$41,250
Springfield	84	$155,000	$38,750

In our current dataset, Rockford is the lowest-cost major city at an index of 82, while Naperville is the most expensive tracked major city at 112. That gap matters because a household that feels comfortable in Rockford may feel far more stretched in Naperville, even before factoring in neighborhood-level differences.

How housing changes the cost picture

Housing is usually the largest line item in household spending, so state-level cost-of-living comparisons become much more meaningful when paired with home prices. In Illinois, the average home price is about $275,000. That does not automatically mean the state is affordable or unaffordable. What matters is whether the payment for a typical home fits local incomes once you include property taxes, insurance, and mortgage structure.

Use our Home Affordability Calculator to test what that home price means for your exact income and debt profile. Then compare with our Illinois state guide for more local context.

How much salary feels comfortable in Illinois?

A practical first-pass benchmark for housing affordability is often around one-quarter of home price in annual income, though the real answer depends on rate, debt, down payment, and taxes. On the statewide average home price, that suggests many households need roughly $68,750 or more to stay in a workable range, with higher needs in more expensive cities and lower needs in the cheapest markets.

That is why cost of living and salary are linked. Lower housing costs can offset weaker wages, while stronger wages can justify higher housing costs if the rest of the budget remains manageable.

Who should pay attention to Illinois cost of living data?

• Relocating households comparing cities before a move
• First-time buyers deciding which metro gives them the best chance to enter the market
• Remote workers comparing take-home lifestyle across states
• Families evaluating whether local income supports local housing costs

Bottom line

Illinois cost-of-living data is most useful when it helps you connect three things: what homes cost, what people earn, and what the full monthly budget looks like. Use the state index as a directional guide, but make final decisions with city-level research and calculator-based budgeting.