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Tariff data · 2026-08-27
← Ameren Illinois Company · IL

DS-1 Residential Zone 2

Applies to Zone 2 only — check which one your bill lists.

When does peak hit on Ameren Illinois Company’s DS-1 Residential Zone 2? The hour never matters here — only the season. Rates peak October–May.

  • peak22.77¢
  • off-peak20.08¢
Weekdays
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Weekends
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

What does DS-1 Residential Zone 2 cost a year?

HouseholdUsesA monthPer yearWorks out to
Apartment

One or two people, no central air, no electric heat

4,866 kWh$103$1,23225.3¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$184$2,21223.4¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$247$2,96622.6¢ / kWh

Estimates, not quotes. We run three made-up but realistic households through this tariff hour by hour for a full year — including the way air conditioning loads the afternoon and an EV loads the small hours. Your own bill depends on when you actually use electricity, which is exactly the thing a per-kWh number hides.

What you actually pay

PeriodRateApplies when
peak22.77¢ up to 800 kWh19.70¢midnight–midnight, October–May
off-peak20.08¢midnight–midnight, June–September

Plus a fixed charge of $14.01 per month.

Should you be on DS-1 Residential Zone 2?

The hour of day does not change what you pay here — the month does. Running the same house through the full year, July costs about $235 and February about $150. That $85 swing is part rate and part weather, and it is the reason a budget built on your spring bill will break in July.

Before a single kilowatt-hour moves, this plan charges $168 a year in fixed fees. On the apartment above that is 14% of the whole bill; on the house with a car charging in it, 6%. Fixed charges are invisible in a cents-per-kWh comparison and they punish small users hardest — if you use very little electricity, the headline rate is the least important number on this page.

If this is new to you

Where this comes from

Effective
2026-03-01

the date this tariff took effect

Covers
delivery + supply

Delivery Charges + Basic Generation Service

Enrollment
open to new customers

Tariff document: https://www.ameren.com/-/media/rates/illinois/residential/electric-rates/distribution-delivery/aiel8rtpbrr08282025.ashx