HomeWattCost

ComEd BES vs DTOD

BES and DTOD cost about the same for a typical Illinois home (within $4 a year). They stay within about 1% of each other at every level of use from 200 to 2,500 kWh a month, with the same daily pattern of use.

Utility ComEdTariffs checked 2026-10-29Typical use 697 kWh/mo, Illinois

Head to head

ScenarioBESDTODCheaper
Typical home, per month$143$142Tie
All-in price per kWh20.4¢20.4¢Tie
Home + EV, charged at the cheapest hour$191$183DTOD
Home + EV, plugged in at 6 pm$191$201BES
Fixed charge$19.99$19.99

Typical home: Illinois average use by month (EIA), shaped hour by hour (NREL ResStock), before taxes. EV: Tesla Model Y Long Range AWD, 1,000 miles a month; cheapest start any hour on BES, 12 am on DTOD.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
BES$171$154$134$120$116$134$180$161$124$126$127$162
DTOD$168$151$131$118$117$136$183$164$126$126$125$160

BES: price by hour

July weekday.

Same price all day
15.9¢12a3a6a9a12p3p6p9p12a

DTOD: price by hour

July weekday.

Super off-peakOff-peakMid-peakPeak
13.1¢14.2¢21.2¢13.9¢13.1¢12a3a6a9a12p3p6p9p12a

BES or DTOD: common questions

Is BES or DTOD cheaper?

BES and DTOD cost about the same for a typical Illinois home (within $4 a year). They stay within about 1% of each other at every level of use from 200 to 2,500 kWh a month, with the same daily pattern of use. Adding an EV driven 1,000 miles a month and charged at each plan’s cheapest hour, DTOD gives the lower total ($183 against $191 a month).

What is the difference between BES and DTOD?

BES is flat: the same price at every hour, with a fixed charge of $19.99 a month. DTOD is time-of-use (summer weekdays: Super off-peak 12 am–6 am, Mid-peak 6 am–1 pm, Peak 1 pm–7 pm, Super off-peak 9 pm–12 am; lowest price 9 pm–6 am next day), with a fixed charge of $19.99 a month.

How the two plans work

BES: Basic Electric Service, single family (no electric space heat)

  • One price per kWh at every hour: 15.9¢ in July and 18.6¢ in January.
  • Shifting use to other hours changes nothing on this plan; using less is the only lever.
  • Fixed charge: $19.99 a month.

DTOD: Delivery Time-of-Day Pricing (fixed-price ComEd supply), single family (no electric space heat)

  • Super off-peak 12 am–6 am, Mid-peak 6 am–1 pm, Peak 1 pm–7 pm, Super off-peak 9 pm–12 am on July weekdays; 6 of 24 hours carry the top price of 21.2¢.
  • The cheapest July weekday hour costs 13.1¢, so moving 1 kWh out of the top hours saves 8.1¢.
  • January weekdays range from 15.8¢ to 23.9¢.
  • Summer pricing applies Jun–Sep; winter pricing Oct–May.
  • Fixed charge: $19.99 a month.

Your own pattern of use decides the winner: compare every ComEd plan on your usage, or see all ComEd plans, sources and peak hours.