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Crunching costs, sorting signals, rendering insights.
Crunching costs, sorting signals, rendering insights.
The 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $75K salary, 3 cities (60%) meet this threshold. You've got plenty of choices. We ran the numbers on 5 cities in Illinois using 2026 census, rent, and salary data. Rockfor…
#1 Ranked: Rockford — cost index 67, rent $1,151/mo, income $53,328
3 of 5 cities keep rent under 30% of $75K
3 of 5 cities keep rent under 30% of $75K gross income
Data sourced from Census Bureau, Zillow, BLS, and Tax Foundation — current as of 2026
The 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $75K salary, 3 cities (60%) meet this threshold. You've got plenty of choices. We ran the numbers on 5 cities in Illinois using 2026 census, rent, and salary data. Rockford comes out on top — here's the full ranking and analysis.
The #1 spot goes to Rockford, and the breakdown explains why. Renters here pay $1,151/month — saving renters $8,928 per year compared to the national average. Meanwhile, Housing is the standout at index 67, making it one of the cheapest in the country for that category. The weak spot? Healthcare at 93. A 26% rent-to-income ratio keeps most households inside the safe zone.
The definition of value.
Flip the lens, and you get a different read: Here's the state-level backdrop: Illinois averages a 104 cost index, $1,779/mo rent, and $91,148 income across 5 cities. That's $116 less than the national rent average. Chicago's premium versus downstate bargains — and that context shapes every city in this ranking.
What to do with this data: use the ranking as a shortlist, then dig into the city profiles for trend lines and category breakdowns. The difference between #1 and #5 is often smaller than the difference between "good on paper" and "actually fits my life." Compare your top picks with our calculator to see real take-home numbers.
| City | State Tax | Sales Tax | Property Tax | Est. Take-Home |
|---|---|---|---|---|
1Rockford | 4.95% | 8.83% | 1.73% | $53,997 |
2Joliet | 4.95% | 8.83% | 1.73% | $53,997 |
3Elgin | 4.95% | 8.83% | 1.73% | $53,997 |
4Naperville | 4.95% | 8.83% | 1.73% | $53,997 |
5Chicago | 4.95% | 8.83% | 1.73% | $53,997 |
The 30% rule — spending no more than 30% of gross income on housing — is the most widely cited benchmark for affordability. On a $75K salary, 3 cities (60%) meet this threshold. You've got plenty of choices.
#1-ranked Rockford has a cost index 37 points lower than the top-5 average of 104. That's not a marginal lead — it's a category of its own.
Rent ranges from $1,151/mo in Rockford to $2,292/mo in Chicago — a monthly difference of $1,141, or $13,692 per year.
Rent in #1-ranked Rockford has increased from $1,087 to $1,151/mo over the past 12 months — a 6% increase. Rising costs may erode its top ranking over time.
146,120 residents · Illinois
Real talk: Why Rockford ranks #1: the numbers tell a clear story. At 67 on the cost index, residents save roughly 44% less than the typical American. Rent sits at $1,151/month while the median household pulls in $53,328/year. The Housing category is particularly strong at 67, though Healthcare (93) lags behind. Home prices average $172,610 — $294,760 below the national median.
150,489 residents · Illinois
Dive into Joliet's numbers: cost index 91 (20 points below national average), rent $1,559/month, income $88,026, and a home price of $255,981. The city's cost profile isn't flat — Housing is the cheapest category at 91, while Healthcare runs 98. With 150,489 residents, it balances mid-size city convenience with manageable costs.
113,310 residents · Illinois
The #3 spot goes to Elgin, and the breakdown explains why. Renters here pay $1,736/month — saving renters $1,908 per year compared to the national average. Meanwhile, Healthcare is the standout at index 100, keeping costs manageable. The weak spot? Housing at 101. At a 24% rent-to-income ratio, there's genuine breathing room in the average household budget.
150,245 residents · Illinois
The #4 spot goes to Naperville, and the breakdown explains why. And in practical terms, renters here pay $2,157/month — costing renters $3,144 more per year compared to the national average. Meanwhile, Healthcare is the standout at index 105, keeping costs manageable. The weak spot? Housing at 126. At a 17% rent-to-income ratio, there's genuine breathing room in the average household budget.
2,664,452 residents · Illinois
Chicago earns its position at #5 through a combination that's hard to replicate. The 134 cost index sits 23 points above the national baseline, and the $75,134 — we had to double-check this one — median income means purchasing power here is partially offset by higher costs. Homes list at $312,457 — $154,913 below the national median — a genuine ownership opportunity. On the cost side, Healthcare leads the way at 107, while Housing trails at 134.
We model what a $75K salary looks like after taxes in each city: federal income tax (marginal brackets), FICA (7.65%), and state income tax. Then we compare take-home against local rent and costs to determine where the salary stretches furthest. All data is sourced from federal agencies and verified research institutions. Cost of living indices are normalized to 100 (national median) using Zillow rent as the primary signal, with sub-category adjustments derived from regional BLS price data. Rankings are updated monthly as new data is released.
Rockford ranks #1 in Illinois for this analysis with a cost index of 67 and median income of $53,328.
Yes. On a $75K salary in Rockford, rent would consume about 18% of your gross monthly income. Financial experts recommend keeping rent under 30%. You're well within that guideline.
Our cost of living index uses real Zillow rent data as the foundation, indexed to 100 (national median). Sub-categories (housing, food, transport, utilities, healthcare) are derived from the overall index with regional adjustments. Data is updated monthly.
Rockford (ranked #1) has a cost index of 67 and rent of $1,151/mo, while Chicago (ranked #5) has a cost index of 134 and rent of $2,292/mo — a 67-point difference in cost of living.
City data is refreshed monthly from Census Bureau population estimates, Zillow rent and home price indices, BLS salary data, and Tax Foundation tax rates. Last updated: 2026.
The median 1-bedroom rent in Rockford is $1,151/month as of 2026, based on Zillow's Observed Rent Index. This is $744 below the national median of $1,895/month.
After federal taxes, FICA (7.65%), and 4.95% state income tax, estimated take-home on $75K in Rockford is approximately $53,997/year ($4,500/month). After median rent of $1,151/month, you'd have roughly $40,185/year for all other expenses.
The median home price in Rockford is $172,610, which is 3.2× the local median income. That's within the standard 3.5× affordability rule for most local earners. The national median home price is $467,370.
Illinois has a 4.95% state income tax rate. Combined state and local sales tax averages 8.83%, and the effective property tax rate is 1.73%.
This ranking was generated using data current as of early 2026. Population and income data comes from the Census Bureau's American Community Survey (5-year estimates). Rent and home price data is from Zillow's monthly releases. Tax rates are from the Tax Foundation's 2025 edition. Rankings are refreshed monthly.