Cost Of Living in Boulder Hill, IL

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A-

4%

Overall NAT. AVG.

3%

Groceries NAT. AVG.

17%

Housing NAT. AVG.

Date & Last Updated: These cost of living estimates reflect 2026 modeled data using U.S. Census housing inputs and AI-assisted city-level pricing models.

The cost of living index is based on a national average of 100. For example, if the cost of living score is 90, then the estimated cost of living is 10% lower than the national average. If the score is 110, then the estimated cost of living is 10% higher than average. The overall index is calculated using weighted estimates across major everyday expense categories, including housing (30%), groceries (16%), transportation (12%), healthcare (10%), utilities (8%), lifestyle and entertainment (8%), household expenses (8%), and education and childcare (8%). All values are AI-assisted city-level estimates designed for directional comparisons.
Index	Boulder Hill	Illinois	National
Cost of living	104	98	100
Groceries	97	100	100
Health care	99	100	100
Housing	117	95	100
Transportation	103	101	100
Utilities	102	99	100
Lifestyle & Entertainment	96	100	100
Household Items	100	100	100
Education & Childcare	96	100	100

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Homes For Sale In Boulder Hill, IL

25 Garden Dr #1

Montgomery, IL

Cost Of Living Quick Facts

The cost of living in Boulder Hill is 6% higher than the Illinois average
The cost of living in Boulder Hill is 4% higher than the national average
Boulder Hill housing is 17% higher than the national average
Illinois general sales tax is 22% higher than the national average
Illinois state income tax is 91% higher than the national average

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Price difference in compared to

Cost of living index
Groceries index
Health care index
Housing index
Transportation index
Utilities index
Lifestyle index
Household index
Educare index

Median Income & Debt-To-Income Ratio

Median Income	Per Year	Per Month	Max Budget (28% DTI)	Max Budget (36% DTI)
Owners	$103,604	$8,634	$2,417	$3,108
Renters	$94,840	$7,903	$2,213	$2,845

To approximate the cost of living and the housing affordability in Boulder Hill, IL, we can look at the percentage of income that is available to be spent on monthly housing, otherwise known as the debt-to-income ratio (DTI). To stay on the safe side, a consumer should not spend more than 28% of his or her gross income on housing-related expenses and costs and not more than 36% of income on all expenses and debts. Homeowners in Boulder Hill have a median income of $103,604. Therefore, the amount that a consumer should spend on housing costs should be no more than $2,417 per month to avoid calamity and poverty. The renters in the city have an income of about $94,840, which would make their monthly maximum allowable rental costs $2,213.

Illinois Sales Tax

State	General Sales Tax	With Max Surtax
Illinois	6.25%	10.25%

Illinois Income Tax

State	Income Tax (Low)	Income Tax (High)
Illinois	4.95%	4.95%

Nearby cities with low cost of living

City	Population	Cost of Living Index	National Avg.
Fairmont, IL	2,777	94	6.0%
Rockdale, IL	2,487	95	4.9%
Newark, IL	1,376	98	2.3%
Millington, IL	679	98	1.8%
Sandwich, IL	7,547	99	1.0%
Boulder Hill, IL	9,282	104	4.4%

Cities with similar population

City	Population	Cost of Living Index	National Avg.
LaSalle, IL	9,282	90	10.1%
Roxborough Park, CO	9,283	148	47.5%
Cameron, MO	9,284	89	11.1%
Groton, CT	9,279	110	10.0%
Corman Park No. 344, SK	9,288	n/a
Boulder Hill, IL	9,282	104	4.4%