Does Wyoming charge a demand charge on EV charging?

Yes — the heaviest bundled stack in the covered Rocky Mountain jurisdictions, about $34 per kW at Casper including the sales-tax and franchise-fee folds. It comes with the covered set's cheapest energy at three to four cents, so the economics hinge on utilization, which the model prices explicitly.

Does Wyoming tax EV charging per kWh?

Yes — 24 cents per gasoline-gallon-equivalent, about 0.7 cents per kWh, in force and WYDOT-administered. The model includes it from year one; at default volumes it is on the order of $5,700 per year.

Which utility serves a Wyoming site?

Rocky Mountain Power serves Casper, Laramie, and most of the I-80 corridor — the modeled territory. Cheyenne is Black Hills Energy, which the model does not yet cover; a Cheyenne address sees the named utility stated rather than a wrong auto-selection.

ForgeAsset / Supercharger ROI / Wyoming

Tesla Supercharger ROI in Wyoming

Wyoming is the covered set's starkest energy-versus-demand trade: Rocky Mountain Power's Schedule 46 sells energy near 3 to 4 cents bundled — among the cheapest anywhere — against a $34-per-kW bundled demand stack, the heaviest of the Rocky Mountain jurisdictions. High-utilization corridor sites are exactly where that trade works, and I-80's through-traffic is the use case. No income taxes exist, and the state's charging excise is in force at less than a cent per kWh.

Model a Wyoming site

What makes Wyoming economics distinct

The I-80 utilization bet, priced explicitly

At about $34 per kW bundled, Schedule 46's demand stack punishes an idle site — and rewards a busy one, because every incremental kWh costs three to four cents. The model prices the demand components exactly (an evening-and-morning on-peak window, a trailing-demand facilities charge, and a load-size charge, each resolving to the monthly peak for a site drawing its hardware peak daily) so the utilization sensitivity is visible, not averaged away.

No income taxes, small fixed costs

Wyoming levies no corporate and no personal income tax. The entity's annual cost is the license tax on in-state assets — about $242 a year at default hardware — and business equipment is assessed at 9.5%, an effective property rate near 0.7% per year, mid-pack in the covered set.

A charging excise priced like road fuel

Wyoming taxes public-charging electricity at 24 cents per gasoline-gallon-equivalent — about 0.7 cents per kWh, collected through WYDOT, in force since late 2025. At default volumes it runs about $5,700 a year, the smallest in-force charging excise in the covered set, and the model carries it from year one.

A rate case is pending — the model says so

Rocky Mountain Power has a general rate case pending that asks for about 8.8% across two steps in early 2027, with an order expected around the first quarter of 2027. The modeled rates are the currently effective ones, and the library re-derives when the order lands — the pending case is stated on the tariff rather than silently ignored.

Utilities and tariffs modeled in Wyoming

Utility & tariff	Energy	Demand
Rocky Mountain Power Sch 46	2.9¢/kWh–4.3¢/kWh by time of day	$34.04/kW of monthly peak

Rates are digit-verified against each utility's own filed sheets and update within two weeks of any revision. Full derivations are on the methodology page.

Wyoming tax profile

Sales tax on hardware: 5%
Business personal property tax: 0.69% of equipment value (example rate)
Clean-fuels credit: no program
Per-kWh charging excise: 0.7¢/kWh (in force)

Wyoming tax defaults applied: no clean-fuels credit program exists in Wyoming (the LCFS revenue line is $0), and no corporate or personal income tax exists. LLC costs use the annual report license tax of $0.0002 per dollar of in-state assets — about $242 per year at default hardware. Sales tax defaults to Casper's 5% rate, and business personal property runs about 0.69% of market value per year at the 9.5% commercial assessment ratio. Wyoming's charging excise — 24 cents per gasoline-gallon-equivalent, about 0.7 cents per kWh — is in force and included from year one; at default volumes it is on the order of $5,700 per year.

Wyoming programs and incentives

NEVI (federal, WYDOT-administered)

Roughly $24 million over five years for corridor DC fast charging along I-80, I-25, and I-90; WYDOT administers rounds.

Wyoming charging market

Wyoming carries roughly 13 Supercharger stations, dominated by I-80 through Cheyenne, Laramie, Rawlins, Rock Springs, and Evanston, plus I-25 and the Yellowstone gateway routes. Rocky Mountain Power serves Casper, Laramie, and the I-80 corridor; Cheyenne is Black Hills Energy territory, which the model does not yet cover.

Wyoming Supercharger ROI — questions

Does Wyoming charge a demand charge on EV charging?: Yes — the heaviest bundled stack in the covered Rocky Mountain jurisdictions, about $34 per kW at Casper including the sales-tax and franchise-fee folds. It comes with the covered set's cheapest energy at three to four cents, so the economics hinge on utilization, which the model prices explicitly.
Does Wyoming tax EV charging per kWh?: Yes — 24 cents per gasoline-gallon-equivalent, about 0.7 cents per kWh, in force and WYDOT-administered. The model includes it from year one; at default volumes it is on the order of $5,700 per year.
Which utility serves a Wyoming site?: Rocky Mountain Power serves Casper, Laramie, and most of the I-80 corridor — the modeled territory. Cheyenne is Black Hills Energy, which the model does not yet cover; a Cheyenne address sees the named utility stated rather than a wrong auto-selection.

Sources

Model a Tesla V4 Supercharger site in Wyoming — payback, NPV, IRR, and a 15-year cash flow from your own inputs.

Run a Wyoming scenario

Other states: California, North Carolina, Georgia, Oregon, Pennsylvania, Florida, Arizona, Texas, Virginia, Illinois, Michigan, Tennessee, Montana, Idaho, Kansas, Nebraska, North Dakota, South Dakota. Coverage spans nineteen states in total — see the full list.

ForgeAsset is software, not investment, tax, or legal advice — outputs are model estimates from your inputs, not guarantees. Rates and programs current as of research; verify current terms with each source before committing capital.