HomeWattCost

APS R-TOU-E (TOU-E) vs R-1 (Medium - Tier 2)

For a typical Arizona home using 1,052 kWh a month, R-1 (Medium - Tier 2) is cheaper by about $82 a year ($193 against $199 a month). R-1 (Medium - Tier 2) stays cheaper at every level of use from 200 to 2,500 kWh a month with the same daily pattern of use.

Utility APSTariffs checked 2026-09-28Typical use 1,052 kWh/mo, Arizona

Head to head

ScenarioR-TOU-E (TOU-E)R-1 (Medium - Tier 2)Cheaper
Typical home, per month$199$193R-1 (Medium - Tier 2)
All-in price per kWh19.0¢18.3¢R-1 (Medium - Tier 2)
Home + EV, charged at the cheapest hour$232$239R-TOU-E (TOU-E)
Home + EV, plugged in at 6 pm$274$239R-1 (Medium - Tier 2)
Fixed charge$13.94$13.94

Typical home: Arizona 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 10 am on R-TOU-E (TOU-E), any hour on R-1 (Medium - Tier 2).

Month by month

Typical-home bill each month on each plan.

PlanJanFebMarAprMayJunJulAugSepOctNovDec
R-TOU-E (TOU-E)$136$118$157$153$210$279$323$328$253$174$130$132
R-1 (Medium - Tier 2)$143$123$160$155$193$259$303$307$236$163$133$138

R-TOU-E (TOU-E): price by hour

July weekday.

Off-peakPeak
15.0¢37.1¢15.0¢12a3a6a9a12p3p6p9p12a

R-1 (Medium - Tier 2): price by hour

July weekday.

Same price all day
16.8¢12a3a6a9a12p3p6p9p12a

How the two plans work

R-TOU-E (TOU-E): Time-of-Use 4pm-7pm Weekdays

  • Peak 4 pm–7 pm on July weekdays; 3 of 24 hours carry the top price of 37.1¢.
  • The cheapest July weekday hour costs 15.0¢, so moving 1 kWh out of the top hours saves 22.1¢.
  • January weekdays range from 6.2¢ to 35.2¢.
  • Summer pricing applies May–Oct; winter pricing Nov–Apr.
  • Weekends follow a different schedule from weekdays.
  • Fixed charge: $13.94 a month.

R-1 (Medium - Tier 2): Fixed Energy Charge Plan, Medium (Tier 2)

  • In July the first 401 kWh a month cost 17.4¢ each; then 16.8¢ above 401 kWh a month.
  • An average Arizona home (1,711 kWh in July) goes past the first tier, so extra load such as an EV is priced higher.
  • Fixed charge: $13.94 a month.

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