Does Iowa charge a demand charge on EV charging?

Both covered utilities do, at very different weights: MidAmerican bills about $6.74 per kilowatt-month on a plain monthly peak; Alliant bills about $32.08 on the peak inside a weekday daytime window. Neither carries a ratchet.

How does Iowa's 2.6¢/kWh electric fuel excise work?

It applies to electricity dispensed into EVs at non-residential locations, in force since July 2023. The operator licenses with the Department of Revenue and remits semiannually; residential charging is exempt. At default volumes it runs about $25,000 a year, and driver-side charging revenue is exempt from sales tax where the excise applies.

Is Supercharger hardware taxed as property in Iowa?

Iowa exempts personal property from property tax, and a June 2026 Iowa Supreme Court decision reading removable equipment out of the real-property base supports a $0 default for operator-owned cabinets. The model carries $0 with county-assessor confirmation noted as an open item.

ForgeAsset / Supercharger ROI / Iowa

Tesla Supercharger ROI in Iowa

Iowa is a tale of two demand charges. MidAmerican — serving Des Moines, Iowa City, Davenport, Sioux City, Council Bluffs, and Waterloo — bills about $6.74 per kilowatt-month on a plain monthly peak with no ratchet and no time window, against roughly 6.3-cent flat energy. Alliant's Cedar Rapids book runs the other way: cheaper time-of-use energy against the heaviest demand charge in the pair, about $32 per kilowatt-month, billed on the peak inside a weekday daytime window. On top of both sits the country's first-generation charging excise: 2.6 cents per kWh on non-residential charging, in force since July 2023.

Model a Iowa site

What makes Iowa economics distinct

MidAmerican's rate book favors charging sites

At a charging site's monthly volume, MidAmerican's first pricing block covers everything — and the blocks beyond it are cheaper, so the model's flat treatment can only overstate. The demand charge is a plain monthly peak with no ratchet, no window, and no seasonal spread worth naming. The modeled figures fold five riders at their current factors, including a filed annual credit.

Cedar Rapids prices demand five times heavier

Alliant's large-service book bills the highest 15-minute demand inside a 7 a.m.–8 p.m. weekday window — which coincides with a charging site's peak — at about $32 per kilowatt-month folded, five times MidAmerican's figure. The energy side is cheaper, but at charging-site load factors the demand side dominates: the same hardware bills roughly $38,000 a month more in Cedar Rapids than in Des Moines.

The 2.6¢/kWh excise, and its sales-tax trade

Iowa's electric fuel excise has applied to non-residential charging since July 2023 — about $25,000 a year at default volumes, carried from year one. The operator remits on semiannual returns. The statute pairs it with an exemption: fuel on which the excise is imposed is exempt from sales tax, so driver-side charging revenue carries no sales tax where the excise applies.

Metro-to-utility mapping is verified, not assumed

Iowa City and Coralville are MidAmerican territory; Cedar Rapids and Marion are Alliant. The model's territory detection pins both sides of that seam from the utilities' own filed franchise-fee lists, because the obvious guess — that the two university metros share a utility — is wrong.

Utilities and tariffs modeled in Iowa

Utility & tariff	Energy	Demand
MidAmerican Rate LS	6.3¢/kWh flat	$6.74/kW of monthly peak
Alliant IPL LGS	4.7¢/kWh–5.8¢/kWh by time of day	$32.08/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.

Iowa tax profile

Sales tax on hardware: 7%
Business personal property tax: none
Clean-fuels credit: no program
Per-kWh charging excise: 2.6¢/kWh (in force)

Iowa tax defaults applied: no clean-fuels credit program exists in Iowa (the LCFS revenue line is $0), and LLC costs use the $30 biennial report — about $15 per year. Sales tax defaults to 7% (6% state plus the 1% local option in both covered metros); driver-side charging revenue is exempt from sales tax where the electric-fuel excise applies. Business personal property is exempt in Iowa, a reading reinforced by the 2026 Chickasaw equipment decision. Iowa's 2.6¢/kWh electric fuel excise on non-residential charging has been in force since July 2023 and is included from year one — on the order of $25,000 per year at default volumes.

Iowa programs and incentives

Iowa electric fuel excise licensing (DOR)

Operators dispensing electric fuel for compensation license as dealers and file semiannual returns through GovConnectIowa; meters are tested biennially.

NEVI (federal, Iowa DOT-administered)

Federal corridor DC fast-charging funding along I-80, I-35, and I-380, administered in award rounds. Iowa's VW settlement DC fast-charging cycles have concluded; site-specific awards enter the model through the grant inputs.

Iowa charging market

Iowa carries roughly 20 Supercharger stations along I-80 and I-35. MidAmerican serves Des Moines and most of the covered metros; Alliant serves the Cedar Rapids corridor and Dubuque. Cedar Falls and Ames run municipal utilities the model does not cover — addresses there see a named-utility notice rather than a wrong auto-selection.

Iowa Supercharger ROI — questions

Does Iowa charge a demand charge on EV charging?: Both covered utilities do, at very different weights: MidAmerican bills about $6.74 per kilowatt-month on a plain monthly peak; Alliant bills about $32.08 on the peak inside a weekday daytime window. Neither carries a ratchet.
How does Iowa's 2.6¢/kWh electric fuel excise work?: It applies to electricity dispensed into EVs at non-residential locations, in force since July 2023. The operator licenses with the Department of Revenue and remits semiannually; residential charging is exempt. At default volumes it runs about $25,000 a year, and driver-side charging revenue is exempt from sales tax where the excise applies.
Is Supercharger hardware taxed as property in Iowa?: Iowa exempts personal property from property tax, and a June 2026 Iowa Supreme Court decision reading removable equipment out of the real-property base supports a $0 default for operator-owned cabinets. The model carries $0 with county-assessor confirmation noted as an open item.

Sources

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

Run a Iowa scenario

Other states: California, North Carolina, Georgia, Oregon, Pennsylvania, Florida, Arizona, Texas, Virginia, Illinois, Michigan, Tennessee, Montana, Idaho, Kansas, Nebraska, North Dakota, South Dakota, Wyoming, New Mexico, Oklahoma, Alabama, Missouri, Wisconsin, Indiana, Louisiana, Nevada. Coverage spans twenty-eight 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.