The United Kingdom or a majority of US states implement a mandatory per-mile road usage charge on electric vehicles before 2030.
Governments seek to replace declining fuel excise taxes as EV adoption grows. Resolves true if a statutory per-mile road fee system is enacted across the UK or over 25 US states.
Across 6 frontier models answering independently, the panel thinks this is unlikely: the median is 18%.
They do not agree: GPT puts it at 37% and Claude at 6%, 31 points apart. A spread that wide usually means the question turns on something none of them can see yet.
Nothing is settled until 12 Oct 2031, when the outcome is checked against sources and every number above gets a permanent score.
What each one said
-
GPTOpenAI
It hinges on whether fiscal pressure converts pilot programs into broad statutes before the 2030 cutoff.
- The UK Parliament could enact one nationwide regime, while the US path requires more than 25 separate state legislatures.
- Oregon, Utah and Virginia have mileage-based programs, but they are limited or optional; broad mandatory EV systems remain rare.
- A sharp fuel-tax revenue shortfall or a UK budget measure adopting a national EV levy would materially raise the odds.
37% -
GeminiGoogle
Mandatory VMT charges face fierce privacy backlash and administrative costs, making flat EV registration surcharges far more likely.
- Most US states already levy annual flat EV registration fees rather than dealing with the GPS and odometer tracking required for VMT.
- Treasury in the UK faces massive fuel duty loss, but Labour and Tories repeatedly shelve pay-per-mile as a toxic voter issue.
- Passing statutory mandates across 26 states by 2030 requires an unprecedented legislative cascade, far above historical tax diffusion rates.
23% -
GrokxAI
UK statute or 25+ US state laws must pass by end-2029.
- UK fuel-duty talks persist but 2000s backlash and 2024-26 delays make a 2027 Budget-to-2029 regs path tight.
- Only OR/UT/VA run voluntary RUC; 25 states need 2027-29 sessions, well above 2-3 new-state/year pace.
- A 2027 US highway bill tying funds to RUC would most raise odds.
18% -
QwenAlibaba
UK road pricing legislation is the only realistic path; 26 US states in three years is essentially impossible.
- US side: only ~5 states have any per-mile EV fee as of 2026; reaching 26 requires ~7 new state laws per year with tracking infrastructure, well beyond any historical…
- UK side: Treasury has signalled intent to replace fuel duty with road pricing, but no bill has been introduced; even with a 2027 act, operational rollout by end-2029 is…
- A change of mind trigger would be the UK government publishing a Road Pricing Bill in the 2026-27 parliamentary session, which would push this above 40%.
17% -
DeepSeekDeepSeek
This turns on whether any large jurisdiction converts a pilot into a binding per-mile mandate within roughly four years.
- Utah's 2023 flat EV fee and Oregon's voluntary RUC show states prefer flat fees or opt-in pilots over mandatory per-mile metering.
- The UK has repeatedly delayed national road pricing; a 2025 consultation is not legislation, and no bill is before Parliament for a 2029 start.
- Only four US states have mandatory RUC programs, all light-vehicle-limited, so reaching 26 states by 2030 needs an implausible 22-state wave.
12% -
ClaudeAnthropic
Needs either UK legislation or 26+ US states enacting per-mile EV charges by 2031 — neither is close.
- UK has only piloted/discussed road pricing repeatedly since 2005 without enacting a national scheme; Treasury favors incremental EV VED changes instead.
- US road usage charge programs exist in pilot form in <10 states (Oregon, Utah, Virginia) with no momentum toward 26+ states adopting mandatory mileage fees by 2031.
- Political resistance to mileage tracking/privacy concerns and lack of federal mandate make rapid multi-state rollout unlikely; a major federal infrastructure funding…
6%
6 of 6 models answered · 31 points between the highest and lowest. None was shown the market price.
Question sourced from a news sweep on 13 Oct 2026. Forecast by google/gemini-3.8-flash, anthropic/claude-sonnet-5, openai/gpt-5.6-terra, x-ai/grok-4.6, deepseek/deepseek-v4.1-flash, qwen/qwen3.8-max-0902 via OpenRouter.