The federal government’s main energy forecaster has projected that the United States could see the electric-vehicle share of the light-duty fleet fall to roughly 18 percent by mid-century, compared with 40 to 46 percent under stricter emissions rules, a shift that would substantially reduce the EV grid load that utilities and grid operators have been preparing to absorb.
The finding comes from the U.S. Energy Information Administration’s Annual Energy Outlook 2026, released April 8, 2026, and drawing close attention as the federal EV charger tax credit reached its June 30, 2026 expiration date under the One Big Beautiful Bill Act.
What the AEO2026 numbers say
All AEO2026 cases take into account the early expiration of clean vehicle and charging infrastructure tax credits under the One Big Beautiful Bill Act; what differs across scenarios is whether the EPA’s Model Year 2027, 2032 tailpipe greenhouse gas emission standards are in place. The EV share of the light-duty vehicle stock decreases from about 40 to 46 percent in 2050 in cases that incorporate those policies to about 18 percent in cases that eliminate them. That roughly 28-percentage-point spread translates directly into the amount of electricity the transportation sector will draw from the grid over the next two and a half decades.
When the MY2027, 2032 EPA standards for both light- and heavy-duty vehicles are suspended, the share of registered light-duty battery electric vehicles and zero-emission freight trucks on the road decreases notably. The EV share of the light-duty vehicle stock decreases from about 40 to 46 percent in 2050 in cases that incorporate those policies to about 18 percent in cases that eliminate them. Zero-emission freight trucks, including both battery electric and fuel cell powertrains, decrease from about 21 to 24 percent of all Class 3, 8 freight trucks on the road in 2050 in cases that include the policies to about 5 percent in cases that do not, according to the EIA narrative.
The combined effect on grid demand in the lower-adoption scenario represents a substantial reduction in the electricity infrastructure buildout that utilities had been planning.
The charging credit that just expired
With the One Big Beautiful Bill Act signed, numerous key EV and charging tax credits have expired, including the Alternative Fuel Vehicle Refueling Property Credit (30C), the Commercial Clean Vehicle Credit (45W), the New Clean Vehicle Credit (30D), and the Used Clean Vehicle Credit (25E).
The federal new clean vehicle tax credit (30D) was eliminated for vehicles acquired after September 30, 2025. For the 30C tax credit, chargers must be “in service” by the cutoff date, meaning charging equipment needed to be purchased and in use by June 30, 2026. The 30C had originally been extended through December 31, 2032 by the Inflation Reduction Act, making the One Big Beautiful Bill Act cutoff more than six years earlier than previously scheduled.
The 30C credit covered 30 percent of EV charging station and installation costs, capped at $100,000 per charger for businesses and $1,000 per charger for residential installations. For commercial installations, the base credit rate was 6 percent, rising to 30 percent for projects meeting prevailing wage and apprenticeship requirements, with the installation required to be in a non-urban or low-income area. Both incentives are now gone.
Grid planning faces a wider range of outcomes
The policy uncertainty encoded in AEO2026 has direct consequences for distribution-level grid planning. Load from a single EV can equal nearly half the annual electricity consumption of an average U.S. household, and this new demand can materialize faster and with less notice than traditional loads.
Forecasting has historically relied on trends in economic and population growth, but transportation electrification presents a new and complex planning challenge. EV charging is driven by complex human behaviors and is mobile. It can also concentrate geographically in ways that, without proper planning, can quickly overwhelm local distribution systems.
Utilities designing substation upgrades and feeder reinforcements now face a scenario range that could differ by more than double the EV fleet size within 25 years.
Although EV and data center server demand show significant growth across most AEO2026 cases, overall electricity demand is projected to grow between 25 and 50 percent by 2050, with EV and data center server demand accounting for between 50 and 80 percent of that growth. A smaller EV fleet compresses demand growth from the top end, but also reduces the grid-flexibility potential that managed EV charging can provide.
That flexibility matters. Analysts tracking the low enrollment rates in managed-charging programs note that utilities need a large enough EV population to make demand-response programs economically viable. Fewer EVs on the road means a thinner pool of flexible load to shift away from peak hours.
Meanwhile, the record pace of grid battery installations planned for 2026 reflects operators hedging against exactly the kind of demand uncertainty the AEO2026 now formalizes.
What comes next
The EIA created a separate report explaining how it implemented the One Big Beautiful Bill Act in its AEO2026 modeling cases. That documentation will be critical reading for state regulators and grid operators deciding whether to accelerate or pause infrastructure investment plans that assumed a larger, faster EV ramp.
The EV charger credit’s expiration arrived with little market disruption in the near term, since the charging hardware market has continued to grow on commercial momentum.
But the AEO2026 makes clear that over a 25-year horizon, the suspension of EPA tailpipe emission standards, combined with the absence of purchase incentives for both vehicles and chargers, reshapes the grid load math in ways that every regional transmission organization will need to factor into its next long-term resource plan.
