Illinois Utility Cost Calculator
Estimate monthly utility bills with ComEd and Nicor Gas rates in Illinois
Illinois Calculator
Control your energy costs
Updated for 2025 with real Illinois rates, brackets, and regulations
Illinois utility costs are shaped by harsh winters that drive heating bills and two dominant providers: ComEd (Commonwealth Edison) serves 4 million customers in northern Illinois at approximately $0.14/kWh for electricity, while Nicor Gas provides natural gas to 2.2 million customers at roughly $1.20 per therm. Unlike some states, Illinois has a deregulated electricity market — you can choose an alternative retail electric supplier (ARES) instead of ComEd's default rate. Heating is the biggest cost driver: natural gas furnaces are standard, and winter bills (December-February) can reach $200-350/month for a typical home. The Illinois Low Income Home Energy Assistance Program (LIHEAP) provides heating bill assistance to qualifying households. Our calculator estimates your monthly utility costs based on home size, heating fuel, and location.
Calculate Your IL Tax
Monthly Utilities (winter)
381$/mo
Electric (ComEd)
$80/mo
Gas (Nicor)
$228/mo
Water/Sewer
$73/mo
Annual Estimate
$4,570
Utility Provider
Chicago (ComEd)
IL Electric Rate
$0.14/kWh(avg)
Breakdown
Insight
Utilities for a 1800 in Illinois cost $381/month in winter. Illinois winters are BRUTAL — Chicago averages 36 inches of snow/year and temps regularly drop below 0°F. Gas heating bills spike to $150-200+/month from November through March. ComEd electricity rates (~$0.14/kWh) are near the national average, but Nicor Gas heating costs dominate winter budgets. Summer AC also drives up electric bills. Gas heat is the smart choice in IL — it's 40-60% cheaper than electric resistance heating for brutal winters. Consider a smart thermostat: lowering from 68°F to 65°F saves ~3% per degree on heating costs.
AI Explanation
What This Means
Based on default inputs, the Illinois Utility Cost Calculator shows a monthly utilities (winter) of 381 $/mo. Key figures: Electric (ComEd): $80/mo, Gas (Nicor): $228/mo, Water/Sewer: $73/mo, Annual Estimate: $4,570, Utility Provider: Chicago (ComEd), IL Electric Rate: $0.14/kWh(avg).
Key Insights
Utilities for a 1800 in Illinois cost $381/month in winter. Illinois winters are BRUTAL — Chicago averages 36 inches of snow/year and temps regularly drop below 0°F. Gas heating bills spike to $150-200+/month from November through March. ComEd electricity rates (~$0.14/kWh) are near the national average, but Nicor Gas heating costs dominate winter budgets. Summer AC also drives up electric bills. Gas heat is the smart choice in IL — it's 40-60% cheaper than electric resistance heating for brutal winters. Consider a smart thermostat: lowering from 68°F to 65°F saves ~3% per degree on heating costs.
What You Can Do
Enter your actual figures in the calculator above for a personalized breakdown. Consider consulting a tax professional for comprehensive planning, especially for complex situations involving multiple income sources or deductions.
Keep In Mind
This calculator provides estimates based on 2026 rates. Actual tax liability may vary based on credits, exemptions, and other factors not captured here. This is for educational purposes only and should not be considered tax advice.
How the Illinois Utility Cost Calculator Works
The Illinois Utility Cost Calculator uses 2026 tax rates, brackets, and deductions specific to Illinois to provide you with an accurate estimate of your tax obligations. Unlike generic federal-only calculators, this tool accounts for the unique tax structure that Illinois residents face.
Formula
Monthly Electric = kWh Usage x Rate/kWh. ComEd avg: ~$0.14/kWh. Monthly Gas = Therm Usage x Rate/Therm. Nicor avg: ~$1.20/therm. Total Utilities = Electric + Gas + Water/Sewer + Internet + Trash.Simply enter your financial details above, and the calculator instantly computes your results using the latest available data. All calculations happen directly in your browser — your personal information is never sent to any server or stored anywhere.
Why Use a Illinois-Specific Calculator?
State-Specific Rates
Uses real 2026 Illinois tax brackets, rates, and thresholds — not generic national averages that miss state-level nuances.
Local Programs & Exemptions
Factors in Illinois-specific programs, exemptions, and deductions that national calculators simply don't account for.
Instant & Private
All calculations run locally in your browser. No account required, no data stored, no waiting for results.
AI-Powered Explanations
Get a plain-English breakdown of your results with actionable insights you can actually use for financial planning.
What's Included
Provider-Specific Rates
Get current rates for ComEd, Ameren, Nicor Gas, and Peoples Gas — the major Illinois utilities.
Winter Heating Projection
See how your gas bills spike in December-February and plan your budget accordingly.
Alternative Supplier Comparison
Illinois deregulated electricity lets you shop for rates — see if switching from ComEd's default saves money.
Frequently Asked Questions
How much are utilities in Illinois?
Monthly averages: Electricity $100-150, Natural Gas $60-100 (winter: $150-350), Water/Sewer $40-70, Internet $60-80, Trash $25-40. Total: $285-440/month for a typical home. Winter heating is the biggest variable — a 2,000 sq ft home with natural gas can see January gas bills of $200-350 depending on thermostat settings and home insulation.
What are ComEd electricity rates in Illinois?
ComEd's residential supply rate averages approximately $0.14/kWh including delivery charges. Your actual rate includes: energy supply charge (~$0.08/kWh), distribution/delivery charges (~$0.04/kWh), and various riders and taxes (~$0.02/kWh). Illinois residents can choose an alternative retail electric supplier (ARES) for the supply portion — but savings vary and some offers have hidden terms.
How much does Nicor Gas cost per month?
Nicor Gas charges approximately $1.20 per therm for residential customers. Monthly costs vary dramatically by season: Summer (May-September) $30-50/month for water heating and cooking, Shoulder (March-April, October-November) $60-120, Winter (December-February) $150-350 for heating. A typical northern Illinois home uses 800-1,200 therms annually.
Can I choose my electricity provider in Illinois?
Yes. Illinois deregulated its electricity market, allowing residential customers to choose alternative retail electric suppliers (ARES) for the supply portion of their bill. ComEd (or Ameren) still handles delivery. Compare offers at the Illinois Commerce Commission's PlugInIllinois.org website. Be cautious of variable-rate plans and cancellation fees.
What is LIHEAP and how do I apply in Illinois?
The Low Income Home Energy Assistance Program (LIHEAP) helps qualifying Illinois households pay heating bills. Income limits: 200% of federal poverty level (about $60,000 for a family of four). Benefits range from $100-1,500 depending on need. Apply through your local Community Action Agency. Priority is given to elderly, disabled, and families with children under 6. The program typically opens September 1st for priority groups and October 1st for the general population.
Important Information for Illinois Residents
Tax laws in Illinois can change annually. This calculator is updated regularly to reflect the latest 2026 rates and regulations, but you should always verify important financial decisions with a qualified Illinois tax professional or CPA.
This tool is designed for informational and educational purposes. While we strive for accuracy using official Illinois Department of Taxation data, the results should be used as estimates for planning purposes only. Your actual tax liability may differ based on credits, special circumstances, and legislative changes that occur after our last update.
For filing deadlines, payment schedules, and official forms, visit the Illinois Department of Taxation and Finance website. If you have complex tax situations involving multiple states, business income, or significant investment gains, professional guidance is recommended.
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