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Tariff data · 2026-08-27
← Wisconsin Power & Light Co · WI

Residential Service Rg-1 (Single Phase)

Does the hour matter on Residential Service Rg-1? No — one rate, every hour of the year.

  • off-peak16.43¢

There is no peak and no off-peak here: 16.43¢ per kilowatt-hour at 3am is the same as at 6pm, on a Sunday as on a Tuesday, in July as in January. Moving laundry or car charging to another time of day will not change this bill by a cent. What does change it is how much you use, and the fixed charge below, which you pay whether you use anything or not.

What does Residential Service Rg-1 cost a year?

HouseholdUsesA monthPer yearWorks out to
Apartment

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

4,866 kWh$82$97920.1¢ / kWh
Family home

Three or four people with central air conditioning

9,453 kWh$144$1,73318.3¢ / kWh
Home with an EV

Same house, plus an electric car charging overnight

13,103 kWh$194$2,33217.8¢ / 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
off-peak16.43¢midnight–midnight

Plus a fixed charge of $0.4932 per day — so longer months cost more before you use a single kWh.

Should you be on Residential Service Rg-1?

One rate, every hour of the year. That makes this plan predictable and nothing else: there is no cheap window to move laundry or car charging into, and no penalty for running the oven at six in the evening. Predictability is worth something if your schedule is not yours to control — but if it is, a flat rate is the one structure that guarantees you cannot benefit from it.

Before a single kilowatt-hour moves, this plan charges $180 a year in fixed fees. On the apartment above that is 18% of the whole bill; on the house with a car charging in it, 8%. 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.

Expect the bill to move with the calendar. The same family home costs about $196 in July and $112 in February — a $84 spread driven by heating and cooling far more than by anything you chose. Budget against the July figure, not the average, and a summer bill stops being a surprise.

How it compares to Wisconsin Power & Light’s other plans

Measured against the other residential plans this utility files, a family home lands 1st cheapest of 4 — nothing else here beats it for that household.

Other Wisconsin Power & Light plans

Who can be on Wisconsin Power & Light’s Residential Service Rg-1 (Single Phase)?

Eligibility is not our judgement — it is written into the tariff Wisconsin Power & Light filed. This is what that document says:

This schedule is available to all residential customers who use single or threephase service and have measured maximum demands of 75 kW or less for at least 8 out of 12 months or annual energy usage of 60,000 kWh or less. For new customers, the company shall, at its discretion, determine the customer�s demand limits and energy usage until review of 12 month�s service. Existing residential customers with measured maximum demands exceeding 75 kW for 8 or more of the past 12 months or whose annual energy usage exceeds 60,000 kWh shall be immediately transferred to the appropriate rate schedule. Customers will not be moved from one rate to another, on the basis of conditions required to qualify for a rate schedule, more often than once a year.

Quoted from the filed tariff. Your utility decides eligibility, not us; check with them before you switch.

If this is new to you

Where this comes from

Effective
2025-01-01

the date this tariff took effect

Covers
delivery + supply

the ZIP-code service map lists this territory as bundled, so the utility sells delivery and supply together

Enrollment
open to new customers

Tariff document: https://www.alliantenergy.com/-/media/alliant/documents/accountandbilling/ratesandtariffs/wplresidentialratesummary.pdf?la=en&hash=333E7E05440DFBE1326467A6D92B98BC