How MidAmerican’s plans work
RS (Residential Service). In July every kWh costs about 12.4¢, whatever the month's use. 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 differ: Mid-peak 8 am–10 pm. 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 11.21¢ per kWh in 2025 (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.