Gas vs. electric driving costs · adjust vehicle and price period below
Why is it like this in Utah?
Utah has one of the largest electric-driving cost advantages in the West. Rocky Mountain Power's rate case, which opened with an 18–30% request, was cut to just 4.7% by the Utah PSC — preserving electricity rates around 11.8¢/kWh and keeping electric miles roughly half the per-mile cost of gasoline for a typical PHEV. Rocky Mountain Power filed a separate wildfire insurance surcharge (~4.5%) in late 2025, but Utah's track record of containing rate cases through strong regulatory oversight suggests the electric advantage will persist.
In the news · Utah
After rejecting Rocky Mountain Power's initial 18–30% request, the Utah PSC approved a 4.7% increase — preserving most of Utah's strong electric cost advantage (~12¢/kWh), where a PHEV like the RAV4 Prime costs roughly half as much per mile to run on electricity as on gas.
Rocky Mountain Power filed another rate increase proposal in late 2025 — a wildfire insurance surcharge of ~4.5% — adding to the ongoing rate pressure on Utah's currently low electricity prices and the PHEV cost-per-mile advantage they support.
An accessible explainer on Rocky Mountain Power's rate case — from the initial 30% request to the final 4.7% approval — providing essential context for understanding why Utah currently has among the lowest residential electricity rates in the West.
Curated coverage of Utah's EV/PHEV cost, policy, and infrastructure story. External links open in a new tab.
West region comparison
| State | Electric ¢/mi | Gas ¢/mi | Cheaper | Annual diff |
|---|---|---|---|---|
| Washington | 4.2¢ | 10.0¢ | ⚡ Electric | $701/yr |
| Nevada | 4.2¢ | 8.8¢ | ⚡ Electric | $549/yr |
| Oregon | 4.4¢ | 8.8¢ | ⚡ Electric | $519/yr |
| Idaho | 3.7¢ | 7.3¢ | ⚡ Electric | $432/yr |
| Montana | 3.9¢ | 7.2¢ | ⚡ Electric | $398/yr |
| Utah | 3.9¢ | 6.8¢ | ⚡ Electric | $342/yr |
| Wyoming | 3.9¢ | 6.5¢ | ⚡ Electric | $307/yr |
| California | 9.2¢ | 11.1¢ | ⚡ Electric | $228/yr |
| Colorado | 5.0¢ | 6.6¢ | ⚡ Electric | $196/yr |
| Alaska | 7.7¢ | 9.1¢ | ⚡ Electric | $170/yr |
| Hawaii | 12.1¢ | 11.6¢ | ⛽ Gas | $59/yr |