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Alliant Energy WI Rg-1 vs Rg-5

Rg-1 and Rg-5 cost about the same for a typical Wisconsin home (within $9 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 Alliant EnergyTariffs checked 2026-09-28Typical use 665 kWh/mo, Wisconsin

Head to head

ScenarioRg-1Rg-5Cheaper
Typical home, per month$129$130Tie
All-in price per kWh19.4¢19.5¢Rg-1
Home + EV, charged at the cheapest hour$176$156Rg-5
Home + EV, plugged in at 6 pm$176$186Rg-1
Fixed charge$16.01$16.01

Typical home: Wisconsin 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 Rg-1, 12 am on Rg-5.

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
Rg-1$150$125$123$110$110$126$170$145$119$112$115$145
Rg-5$150$126$115$104$106$136$186$158$114$106$109$148

Rg-1: price by hour

July weekday.

Same price all day
17.0¢12a3a6a9a12p3p6p9p12a

Rg-5: price by hour

July weekday.

Off-peakMid-peakPeak
9.5¢21.0¢29.9¢21.0¢9.5¢12a3a6a9a12p3p6p9p12a

Rg-1 or Rg-5: common questions

Is Rg-1 or Rg-5 cheaper?

Rg-1 and Rg-5 cost about the same for a typical Wisconsin home (within $9 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, Rg-5 gives the lower total ($156 against $176 a month).

What is the difference between Rg-1 and Rg-5?

Rg-1 is flat: the same price at every hour, with a fixed charge of $16.01 a month. Rg-5 is time-of-use (summer weekdays: Mid-peak 6 am–11 am, Peak 11 am–7 pm, Mid-peak 7 pm–11 pm; lowest price 11 pm–6 am next day), with a fixed charge of $16.01 a month.

How the two plans work

Rg-1: Residential Service

  • One price per kWh at every hour, all year: 17.0¢.
  • Shifting use to other hours changes nothing on this plan; using less is the only lever.
  • Fixed charge: $16.01 a month.

Rg-5: Residential Time-of-Use

  • Mid-peak 6 am–11 am, Peak 11 am–7 pm, Mid-peak 7 pm–11 pm on July weekdays; 8 of 24 hours carry the top price of 29.9¢.
  • The cheapest July weekday hour costs 9.5¢, so moving 1 kWh out of the top hours saves 20.4¢.
  • January weekdays range from 9.5¢ to 29.9¢.
  • Weekends differ: off-peak all day.
  • Fixed charge: $16.01 a month.

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