Average Utility Costs in Decatur, IL

Estimated monthly utility costs (1,000 kWh + 5,000 gal)

Average monthly utility costs in Decatur, IL are about $261.88, based on 1,000 kWh of electricity and 5,000 gallons of water, plus sewer and trash fees. See the full breakdown and sources below.

Total estimated monthly utilities

$261.88

Estimated average monthly utilities in Decatur are ~$261.88 (1,000 kWh + 5,000 gal assumptions). Average water bill estimate: ~$44.69/mo at 5,000 gallons.

Data freshness: last verified 2026-10-18

Electric includes approximate delivery (ComEd Rate RDS).

  • Electric $155.01 (59%)
  • Water $44.69 (17%)
  • Sewer $33.25 (13%)
  • Trash $28.93 (11%)

Utilities here are about 10% higher than the Illinois city average, driven mainly by electric rates.

  • In Illinois, heating and cooling often makes electric the largest share of the bill.
  • Trash is provided by private haulers; residents choose their own. Our estimate reflects typical rates for the area—contact haulers for exact pricing.

How rates in Decatur have changed

When a published residential tariff no longer matches what we had on file, we keep the previous figure and record the date. Comparisons below use the same assumed usage as the estimate on this page. A percentage is shown only when both figures are confirmed charges of the same kind. How we compare past rates.

  • Electricity is down 11.7%, from $113.26 to $100.05 at 1,000 kWh.

    The previous tariff was last verified July 14, 2026. We recorded this change on October 18, 2026.

    Ameren Illinois non-summer Price to Compare is 10.441 cents for the first 800 kWh and 8.262 cents above that, for October 1, 2026 through May 31, 2027. At 1,000 kWh the blend is 10.0052 cents, down from the flat summer rate of 11.326 cents. Delivery is billed separately.

    Both amounts use the seasonal schedule published on that date, at the same assumed usage.

    This comparison is the supply price on the electric card. Delivery is billed in addition and was not part of this change.

    One earlier change is also on file. The figures above are the latest one.

    Plug In Illinois – Ameren Illinois Price to Compare (October 1, 2026–May 31, 2027)

Electric

Confirmed
Provider
Ameren Illinois
Base charge
$0.00/mo
Energy rate
$0.1001/kWh
Assumed usage
1000 kWh
Supply + trans. only
$100.05

Delivery (approximate)

At 1,000 kWh: $14.04 customer charge + 3.97¢/kWh distribution + 0.13¢/kWh IEDT ≈ $54.96/mo.

Approx. full electric (supply+trans+delivery): $155.01/mo

Meter $5.32 + Customer $8.72. Distribution 4.376¢ (0–800 kWh), 2.324¢ (>800) non-summer. At 1,000 kWh total ~$141 (supply + delivery).

CUB – Ameren Illinois Delivery Rates (Jan 2025) (verified 2026-03-17). Rate RDS (Retail Delivery Service)

plugin.illinois.gov· verified 2026-10-18

IL allows supplier choice. Ameren delivers; Price to Compare is default supply.

Water

Confirmed
Provider
City of Decatur Water Division
Base charge
$15.69/mo
Volumetric rate
$5.80/1,000 gal
Assumed usage
5,000 gal
Estimated monthly
$44.69
decaturil.gov· verified 2026-10-18

Sewer

Confirmed
Method
tiered
Estimated monthly
$33.25

Tiered structure simplified to a representative monthly estimate at assumed usage.

decaturil.gov· verified 2026-10-18

Trash

Confirmed
Monthly fee
$28.93

Basic service (one cart) $28.93/mo ($57.86 bi-monthly). Expanded (two carts) $40.83/mo. Approved by City Council April 2024. Includes trash and recycling.

wandtv.com· verified 2026-10-18

Check Internet pricing & availability in Decatur

Internet service varies widely—many providers, different plans, introductory offers, and bundles make it hard to compare apples to apples. That's why we don't estimate internet on this page like we do for electric, water, sewer, and trash. Use our tool to compare providers for your address or ZIP code.

Total estimated monthly utilities

$261.88

What changes your bill most?

  • Electric is about 59% of your estimated utilities here.
  • Every 100 kWh changes your total by about $10.01.
  • Each additional 1,000 gallons of water adds about $11.26 to your water and sewer bills combined (water ~$5.80 + wastewater ~$5.46).

Share your utility bill

These figures are estimates built from published rate schedules. If you pay a utility bill anywhere in the US, share what you actually paid and help us show how close published rates land. It's anonymous, takes about a minute, and we never ask for your name or account number.

We're collecting submissions now and publishing nothing yet. Once a city has enough verified reports, we'll show them here alongside our rate-based estimates — city, provider, month, and amount, with nothing attached that identifies a household.

Share your bill

Assumptions

  • Electric: 1000 kWh/month
  • Water: 5,000 gallons/month

What these labels mean

  • Confirmed — From this area's rate schedule.
  • Benchmark — From an official typical (e.g. state commission 1,000 kWh); not city-specific.
  • TDU + supply — Estimated total at 1,000 kWh: regulated delivery plus a representative supply benchmark. Not delivery charges alone, and not a plan you can enroll in.
  • Estimated — From other or incomplete sources; use as a rough guide.
Sources

Wondering if solar makes sense for you? Try our solar payback calculator to find out.

More in Illinois

Illinois utility costsMacon CountyUtility providers in Illinois

FAQ

In Decatur, sewer is billed in tiers based on usage, so the rate per gallon changes with volume. Our estimate uses the rate structure from City of Decatur – 2026 Utility Rates (water, sewer, storm drain) at the assumed 5,000 gallons per month. Your bill will vary with actual usage.
We use base charges and per-unit rates from official provider pages. Electric = base + (rate × assumed kWh). Water = base + (rate per 1,000 gal × assumed gallons / 1,000). Sewer is either a flat fee or a percentage of water. Trash is a fixed monthly fee. See the Methodology page for full formulas.
Actual bills depend on your usage, seasonal rates, taxes, fees, and provider-specific rules. Our estimates use fixed assumed usage (e.g., 1,000 kWh, 5,000 gal) for comparison. Your home may use more or less.
Each component shows a 'last verified' date. We aim to update from official sources periodically; always confirm current rates on the provider's site before making decisions.

Learn more

For tips on understanding your bill, comparing cities, and how electric and utility rates work by state, see our blog. Compare Decatur with another city side-by-side, or see how we calculate estimates.