There is robust evidence that fossil fuel prices influence the adoption of electric vehicles. In a study of California between 2014 and 2017, Bushnell et al. (2022) show that when consumers decide whether to go electric, the price of gasoline matters four to six times more than the price of electricity, suggesting that what pushes people toward EVs is less the promise of cheap charging than the pain of expensive fuel. The pattern holds in China: Fei et al. (2025) track monthly sales across 36 cities and find that a 1 CNY/L rise in gasoline prices lifts overall EV sales by 4.67%, with pure battery electric vehicles surging by 9.04%. Most recently, Zhang et al. (2026) confirm the relationship in a European context, showing that a 1% increase in gasoline prices raises EV registrations by 0.85% across Denmark, Finland, Norway and Sweden, with budget-friendly models benefiting the most.
Yet the historical record shows that without structural reinforcement, oil-shock-driven shifts in vehicle preferences tend to reverse. During the 2007–08 oil spike, US demand for SUVs and pickup trucks fell sharply, before recovering in subsequent years as fuel prices declined and macroeconomic conditions improved. The pattern repeated after 2014: When crude prices collapsed from USD115 per barrel to below USD30 by early 2016, lower fuel prices coincided with renewed consumer demand for SUVs and pickups, encouraging manufacturers to prioritize those segments. Analysis by Resources for the Future confirms that gasoline prices accounted for a substantial share of the shift toward smaller vehicles between 2003 and 2007, yet that trend reversed once prices fell post-2014.
Crucially, where EV adoption remained resilient through past oil price downturns, strong policy frameworks appear to have played a decisive role. The International Council on Clean Transportation (ICCT) observed that during the 2014 crash, EV sales continued to grow in Norway, the UK and China, markets that combined robust purchase incentives, charging infrastructure deployment and regulatory support, while markets without comparable policy frameworks showed stagnation. The IEA's Global EV Outlook 2025 reinforces this point looking forward: lower oil prices reduce the fuel-cost savings of EVs, and this effect is particularly pronounced in countries with low fuel taxation. The distinction between cyclical and structural displacement is critical: the demand lost during the pandemic was temporary and rebounded once economies reopened, whereas displacement driven by EVs becomes durable only when underpinned by lasting changes in technology, policy and consumer behavior.
This is precisely where carbon pricing enters the picture as a mechanism to make the fossil-fuel cost signal permanent and predictable. While geopolitical shocks produce sharp but temporary price spikes, a well-designed carbon tax raises the floor price of fossil fuels structurally, removing the cyclicality that has historically allowed consumer preferences to revert. Under such a regime, every barrel of oil carries its environmental cost regardless of what OPEC decides or whether a Middle Eastern conflict escalates or de-escalates.
To explore how different carbon pricing trajectories might shape the pace of BEV adoption in Europe, we consider three oil-price scenarios over the 2025–2035 horizon, each reflecting a distinct policy ambition, following the NGFS framework. Under a Baseline scenario – current policies, no additional carbon pricing – oil prices stabilize around USD77–86/barrel through 2035, despite short-term possible price fluctuations related to exogenous factors such as geopolitical instabilities. EU pump prices remain flat at approximately EUR1.73–1.95/L, and BEV adoption grows primarily through the autonomous trend at roughly 1.75pps per year, driven by technology improvement rather than price signals.
Under a Nationally Determined Contributions (NDC) scenario, carbon border adjustments and emissions trading begin to bite, pushing oil toward USD100–114/barrel by the early 2030s and EU pump prices to approximately EUR2.10–2.55/L, enough to make fuel expenditure a meaningful push factor, with BEV share reaching approximately 50% in Germany by 2030. Under a Net Zero 2050 scenario, aggressive carbon pricing drives oil above USD190/barrel by 2028–2031 and pump prices to EUR3.50–5.60/L, at which point ICE ownership becomes economically untenable for most households and the mass switch to BEVs accelerates sharply. Figure 10 shows the different pathways of BEV share related to a permanent shift in oil prices.
Carbon pricing raises the long-run cost of fossil-fuel driving. But making the old technology expensive is not the same as making the new one affordable, particularly for low- and middle-income households, who are the mass market. These are distinct economic problems, because carbon pricing internalizes the emissions externality, while purchase subsidies address the separate barriers – such as upfront cost, learning-by-doing, network effects around charging infrastructure – that hold back adoption of a technology most consumers still perceive as novel and risky. The two instruments are often best deployed as complements rather than alternatives. European policymakers appear to have absorbed this logic, as the number of active national EV incentive policies across EU-27 countries has grown from just two in 2010 to 74 by 2024, with a sharp acceleration after 2019 as governments layered purchase grants, tax exemptions, charging infrastructure support and fleet incentives on top of one another.
How far can subsidies alone take Europe? To answer this, we model BEV adoption across EU-26 ? countries under three policy scenarios, calibrating the subsidy effect from Martins et al. (2024). Their estimates show that a modest tax exemption worth around EUR1,000 adds 3.2% annual growth to BEV market share, a moderate grant below EUR5,000 adds 11.6% and a generous grant above EUR5,000 adds 26.4%. To analyze the BEV pathways as a response to subsidies, we built different scenarios (Figure 12). In the most optimistic scenario, every EU country raises grants to at least EUR5,000 through 2031, then gradually phasing them out by 2035 as BEV-ICE cost parity approaches, i.e., market share reaches 70% by 2030 and 93% by 2035. If instead governments simply maintain current programs through 2028 and then let them wind down, BEV share reaches only 59% by 2030. If political backlash or fiscal pressure leads to abrupt subsidy removal by 2029, adoption stalls at just 48% by 2030, slowly recovering to 76% by 2035 as the market falls back on cost economics and regulation alone. Therefore, even the most generous pathway falls 10pps short of the 80% BEV share by 2030 that would be consistent with meeting European decarbonization targets.
The evidence shows that subsidies accelerate adoption, but fiscal constraints might make it unrealistic for several economies to sustain large-scale purchase incentives through the full duration of the transition. Muehlegger and Rapson (2022) show that low- and middle-income households are highly price-sensitive when it comes to EVs: a 10% price reduction can increase sales in this segment by roughly 21%. But no government can subsidize its way to 80% market share indefinitely. The fiscal cost escalates as adoption scales, and as Archsmith et al. (2022) argue, what ultimately sustains mass adoption is not the subsidy itself but what they call "intrinsic demand", the point at which vehicle quality, model availability, charging convenience and total cost of ownership make the EV the obvious choice without a grant, which would dependent on speeding up the technological transition.
The technological case for EVs rests, above all, on one number: the price of a lithium-ion battery pack. Figure 13 shows that price has fallen from USD1,474 per kilowatt-hour in 2010 to USD108 in 2024, a 93% decline in 14 years. This trajectory follows a remarkably stable learning rate of approximately 18%: every doubling of cumulative manufactured capacity reduces costs by roughly a fifth. What makes this learning rate so consequential is that global battery demand is now entering an exponential phase. Passenger EVs already dominate, but demand from electric buses, commercial vehicles, two- and three-wheelers and stationary storage is compounding rapidly. It is projected that total demand will rise from roughly 1,000 GWh today to over 5,000 GWh by the early 2030s. Each of these segments feeds the same manufacturing base, driving cumulative production volumes higher and pulling costs down further regardless of what happens in any single market. If the 18% learning rate holds, pack prices are on track to reach approximately USD60–70/kWh by 2030 and could fall below USD55 by the mid-2030s. At those levels, the upfront purchase price of a BEV falls below that of an equivalent ICE vehicle in most segments without any subsidy at all. This is the point at which "intrinsic demand" takes over: the EV becomes the default choice not because governments pay people to buy it, but because it is simply the cheaper, better car.
There is, however, a final condition that determines whether all of this – the carbon pricing, the subsidies, the falling battery costs – actually delivers on its environmental promise. An EV is only as clean as the electricity it runs on. Across the EU, grid carbon intensity has fallen from 0.45 tCO₂/MWh in 2005 to 0.22 in 2025, driven by a low carbon energy share that has grown from 47% to 70% of total generation (renewables grew from 16% to 50%). Under the EU NDC scenario, that trajectory continues: carbon intensity drops to 0.18 by 2030, 0.13 by 2035 and 0.07 by mid-century as low-carbon sources rise from 70% to 86% of generation. Each reduction compounds the emissions benefit of every EV already on the road. Moving from today's low-carbon electricity share of 70% to roughly 80% by 2035 would, on its own, reduce the per-vehicle carbon footprint of an EV by over 40%.
Germany illustrates the benefits of the grid transition. With a low-carbon share of 57% in 2025, an EV driven 14,000 km per year emits approximately 0.98 tCO₂, already 46.6% less than a new ICE car. But the gains from grid greening are steep: as Germany's low-carbon share rises to 64% by 2030 and 76% by 2035 under NDC commitments, the annual CO₂ saving per vehicle climbs from 0.85 tCO₂ today to 1.05 by 2030 and 1.39 by 2035, a 75.6% reduction relative to ICE. Therefore, grid decarbonization alone, without any change in driving behavior or vehicle efficiency, cuts the German EV's carbon footprint by 54% over a single decade. This creates a powerful feedback loop: the more EVs on the road, the stronger the case for grid investment; the greener the grid becomes, the larger the climate return on every vehicle already switched. Conversely, stalling grid decarbonization erodes the credibility of the entire transition. An 80% BEV fleet running on a ‘brown’ grid delivers far less than a 50% BEV fleet running on a clean one. Grid decarbonization is a critical complement of green transport in Europe.