HomeWattCost

MidAmerican Energy rates

MidAmerican has 2 residential plans modelled here. For a typical Iowa home using 856 kWh a month, the cheapest is RST, at about $97 a month.

Investor-owned 632,436 residential customers (EIA-861, 2024) Tariffs checked September 28, 2026

Typical all-in priceRST

01234567890123456789.0123456789¢/kWh
RS$100/mo
RST$97/mo

Residential plans

PlanTypeFixed/moJuly pricesJanuary pricesJuly weekday windows
RS
Residential Service		 Tiered $8.50 12.4¢ all hours 9.8¢ 0–1,000 kWh · 6.3¢ over 1,000 kWh None
RST
Residential Time-of-Use		 Time-of-use $8.50 Off-peak 8.3¢ · Mid-peak 10.8¢ · Peak 22.7¢ Off-peak 8.4¢ · Peak 9.6¢ Mid-peak 8 am–1 pm, Peak 1 pm–6 pm, Mid-peak 6 pm–10 pm

RST: price by hour

July weekday. Summer pricing Jun–Sep; winter Oct–May.

Off-peakMid-peakPeak
8.3¢10.8¢22.7¢10.8¢8.3¢12a3a6a9a12p3p6p9p12a

Charging an EV on MidAmerican

1,000 miles a month in a Tesla Model Y Long Range AWD (275 kWh from the wall, EPA 27.5 kWh/100 mi) at 7.2 kW, added to a typical Iowa home’s use, on each plan’s cheapest start hour versus plugging in at 6 pm. Averaged over the year.

PlanBest startCharging, best startCharging from 6 pmWhole bill with EV
RSAny$27/mo$27/mo$127/mo
RST12 am$23/mo$27/mo$120/mo

With an EV charged at its best hour, the cheapest plan overall is RST. Compare plans on your own usage.

How MidAmerican’s plans work

RS (Residential Service). In July the first 0 kWh a month cost 12.4¢ each; then . An average Iowa home (1,209 kWh in July) stays within the first tier. Fixed charge: $8.50 a month.

RST (Residential Time-of-Use). Mid-peak 8 am–1 pm, Peak 1 pm–6 pm, Mid-peak 6 pm–10 pm on July weekdays; 5 of 24 hours carry the top price of 22.7¢. The cheapest July weekday hour costs 8.3¢, so moving 1 kWh out of the top hours saves 14.4¢. January weekdays range from 8.4¢ to 9.6¢. Summer pricing applies Jun–Sep; winter pricing Oct–May. Weekends follow a different schedule from weekdays. Fixed charge: $8.50 a month.

Prices on this page are all-in per kWh, before taxes: base rates, supply and every per-kWh rider in the utility’s current tariff sheets. Your bill shows them as separate lines, and riders can change between tariff revisions.

As a cross-check, MidAmerican billed its residential customers an average of 11.01¢ per kWh in 2024 (revenue ÷ sales, EIA-861). A plan taken from URDB is shown only if its all-in price is consistent with that figure, adjusted for Iowa’s price change since.

Sources for each plan

PlanEffectiveSeasonsSolar exportsSource and status
RS
Transcribed from the utility’s tariff		 August 28, 2026 Summer pricing Jun–Sep; winter Oct–May Not recorded in URDB Checked September 28, 2026
MidAmerican Energy Iowa Electric Tariff No. 2 (Rate RS sheets 200-202, Rate RST sheets 291-293, Clauses TCA sheet 430, EAC sheet 434, EECR sheet 435, E sheets 446-455, PI sheets 456-459, TERM sheet 464.20)
RST
Transcribed from the utility’s tariff		 August 28, 2026 Summer pricing Jun–Sep; winter Oct–May Not recorded in URDB Checked September 28, 2026
MidAmerican Energy Iowa Electric Tariff No. 2 (Rate RS sheets 200-202, Rate RST sheets 291-293, Clauses TCA sheet 430, EAC sheet 434, EECR sheet 435, E sheets 446-455, PI sheets 456-459, TERM sheet 464.20)

Plans marked “Checked” were transcribed from the utility’s current tariff and rider sheets, all charges included, and are re-checked on the date shown in each file. Other plans come from the OpenEI U.S. Utility Rate Database (CC BY 4.0) and have not yet been checked line by line against the utility’s tariff. Always confirm the current rates on your utility’s website before switching plans.

Run the numbers on MidAmerican

EV charging cost Which plan is cheaper Best time to run things Appliance cost Solar payback Heat pump vs gas