How PSO’s plans work
RS (Residential Service). In July the first 1,350 kWh a month cost 16.4¢ each; then 19.2¢ above 1,350 kWh a month. An average Oklahoma home (1,598 kWh in July) goes past the first tier, so extra load such as an EV is priced higher. Fixed charge: $19.27 a month.
RSTOD (Residential Service Time of Day). Peak 2 pm–7 pm on July weekdays; 5 of 24 hours carry the top price of 34.2¢. The cheapest July weekday hour costs 12.2¢, so moving 1 kWh out of the top hours saves 22.0¢. In January every hour costs the same (12.4¢). Summer pricing applies Jun–Oct; winter pricing Nov–May. Weekends differ: off-peak all day. Fixed charge: $19.27 a month.
RSEV (Residential Service Electric Vehicle). Mid-peak 6 am–2 pm, Peak 2 pm–7 pm, Mid-peak 7 pm–11 pm on July weekdays; 5 of 24 hours carry the top price of 34.2¢. The cheapest July weekday hour costs 9.9¢, so moving 1 kWh out of the top hours saves 24.3¢. January weekdays range from 9.9¢ to 13.3¢. Summer pricing applies Jun–Oct; winter pricing Nov–May. Weekends differ: Mid-peak 6 am–11 pm. Fixed charge: $19.27 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, PSO billed its residential customers an average of 14.23¢ 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 Oklahoma’s price change since.